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buildkit
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Add initial MergeOp implementation. 

This consists of just the base MergeOp with support for merging LLB
results that include deletions using hardlinks as the efficient path
and copies as fallback.

Signed-off-by: Erik Sipsma <erik@sipsma.dev>
master
Erik Sipsma 2021-08-03 01:57:39 +00:00
parent 9321ec2f82
commit d73e62f878
39 changed files with 3522 additions and 572 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

237
api/services/control/control.pb.go
View File

@ -205,13 +205,14 @@ type UsageRecord struct {
Mutable bool `protobuf:"varint,2,opt,name=Mutable,proto3" json:"Mutable,omitempty"`
InUse bool `protobuf:"varint,3,opt,name=InUse,proto3" json:"InUse,omitempty"`
Size_ int64 `protobuf:"varint,4,opt,name=Size,proto3" json:"Size,omitempty"`
Parent string `protobuf:"bytes,5,opt,name=Parent,proto3" json:"Parent,omitempty"`
Parent string `protobuf:"bytes,5,opt,name=Parent,proto3" json:"Parent,omitempty"` // Deprecated: Do not use.
CreatedAt time.Time `protobuf:"bytes,6,opt,name=CreatedAt,proto3,stdtime" json:"CreatedAt"`
LastUsedAt *time.Time `protobuf:"bytes,7,opt,name=LastUsedAt,proto3,stdtime" json:"LastUsedAt,omitempty"`
UsageCount int64 `protobuf:"varint,8,opt,name=UsageCount,proto3" json:"UsageCount,omitempty"`
Description string `protobuf:"bytes,9,opt,name=Description,proto3" json:"Description,omitempty"`
RecordType string `protobuf:"bytes,10,opt,name=RecordType,proto3" json:"RecordType,omitempty"`
Shared bool `protobuf:"varint,11,opt,name=Shared,proto3" json:"Shared,omitempty"`
Parents []string `protobuf:"bytes,12,rep,name=Parents,proto3" json:"Parents,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
@ -278,6 +279,7 @@ func (m *UsageRecord) GetSize_() int64 {
return 0
}
// Deprecated: Do not use.
func (m *UsageRecord) GetParent() string {
if m != nil {
return m.Parent
@ -327,6 +329,13 @@ func (m *UsageRecord) GetShared() bool {
return false
}
func (m *UsageRecord) GetParents() []string {
if m != nil {
return m.Parents
}
return nil
}
type SolveRequest struct {
Ref string `protobuf:"bytes,1,opt,name=Ref,proto3" json:"Ref,omitempty"`
Definition *pb.Definition `protobuf:"bytes,2,opt,name=Definition,proto3" json:"Definition,omitempty"`
@ -1155,95 +1164,96 @@ func init() {
func init() { proto.RegisterFile("control.proto", fileDescriptor_0c5120591600887d) }
var fileDescriptor_0c5120591600887d = []byte{
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0xd6, 0x54, 0x92, 0x33, 0xd1, 0xff, 0xb1, 0x08, 0xb5, 0x5d, 0x59, 0xe3, 0x59, 0x39, 0xac, 0x42,
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0x29, 0xc7, 0x57, 0x82, 0xb4, 0x1b, 0x1c, 0xed, 0x62, 0x4b, 0x03, 0x79, 0x50, 0x7e, 0xf8, 0x3a,
0xa5, 0x4c, 0x96, 0x54, 0x5e, 0xd1, 0x4c, 0x64, 0xf4, 0x02, 0x96, 0xb3, 0xf5, 0x03, 0x21, 0x98,
0x2c, 0x54, 0x59, 0x46, 0x77, 0x66, 0xcb, 0xc8, 0x36, 0x2a, 0x98, 0xc2, 0x3c, 0x4c, 0x04, 0x1b,
0xe3, 0x69, 0x1e, 0xe9, 0xe1, 0x2e, 0xe1, 0x5c, 0x5a, 0xa8, 0xd2, 0x8f, 0x33, 0x51, 0x9a, 0xf3,
0x19, 0xa3, 0x89, 0x20, 0x49, 0x5f, 0xa5, 0xbe, 0x82, 0x27, 0xb2, 0x34, 0x27, 0x5b, 0x6b, 0x73,
0x4a, 0x67, 0x32, 0x67, 0x0a, 0x63, 0xcc, 0x99, 0xda, 0x43, 0x9b, 0x50, 0xd8, 0x0a, 0x7b, 0xaf,
0x88, 0xca, 0x72, 0xb5, 0xb5, 0x36, 0x4b, 0xa8, 0x3e, 0x7f, 0xae, 0xd2, 0xca, 0x55, 0xa3, 0x5e,
0xc2, 0x1a, 0x82, 0xbe, 0x82, 0xda, 0xc3, 0x44, 0x44, 0x22, 0x26, 0x43, 0x95, 0xb1, 0x8a, 0xcc,
0x58, 0x7b, 0xf3, 0xed, 0xe1, 0xfa, 0x87, 0x0b, 0x0f, 0x9e, 0x91, 0x88, 0xe2, 0x26, 0xb1, 0x50,
0x81, 0x45, 0x81, 0xa7, 0xf8, 0xd0, 0x4b, 0x58, 0xc9, 0x8c, 0xdd, 0x4e, 0xd2, 0x91, 0xe0, 0x2e,
0x28, 0xaf, 0x5b, 0x67, 0xf4, 0x5a, 0x83, 0xb4, 0xdb, 0xc7, 0x98, 0xbc, 0xfb, 0x80, 0x66, 0x73,
0x25, 0x6b, 0x6a, 0x9f, 0x8c, 0xb3, 0x9a, 0xda, 0x27, 0x63, 0xd9, 0xd6, 0x07, 0x61, 0x3c, 0xd2,
0xed, 0x5e, 0xc1, 0x5a, 0xd8, 0xcc, 0xdd, 0x73, 0x24, 0xc3, 0x6c, 0x78, 0xcf, 0xc5, 0xf0, 0x05,
0x5c, 0x99, 0x63, 0xea, 0x1c, 0x8a, 0x1b, 0x36, 0xc5, 0x6c, 0x4d, 0x1f, 0x51, 0xfa, 0x3f, 0xe7,
0xa1, 0x66, 0x27, 0x0c, 0x6d, 0xc0, 0x15, 0xed, 0x27, 0x26, 0x7b, 0x1d, 0x92, 0x32, 0xd2, 0x93,
0xa7, 0x84, 0x21, 0x9f, 0xf7, 0x09, 0xb5, 0xe0, 0xea, 0xf6, 0xd0, 0x6c, 0x73, 0x0b, 0x92, 0x53,
0xfd, 0x38, 0xf7, 0x1b, 0xa2, 0xf0, 0x2f, 0x4d, 0xa5, 0x22, 0x61, 0x81, 0xf2, 0x2a, 0x61, 0x1f,
0x9d, 0x5c, 0x55, 0xc1, 0x5c, 0xac, 0xce, 0xdb, 0x7c, 0x5e, 0xf4, 0x09, 0x94, 0xf4, 0x87, 0xac,
0x31, 0xaf, 0x9f, 0xfc, 0x17, 0x9a, 0x2c, 0xc3, 0x48, 0xb8, 0xf6, 0x83, 0xbb, 0x85, 0x73, 0xc0,
0x0d, 0xc6, 0x7b, 0x04, 0xde, 0x62, 0x93, 0xcf, 0x53, 0x02, 0xfe, 0x4f, 0x0e, 0x5c, 0x9e, 0xf9,
0x23, 0x79, 0x6b, 0xa8, 0x73, 0x53, 0x53, 0xa8, 0x35, 0xea, 0x40, 0x41, 0x77, 0x7e, 0x4e, 0x19,
0x1c, 0x9c, 0xc1, 0xe0, 0xc0, 0x6a, 0x7b, 0x0d, 0xf6, 0xee, 0x01, 0x5c, 0xac, 0x58, 0xfd, 0x5f,
0x1d, 0x58, 0x36, 0x5d, 0x66, 0xae, 0xd8, 0x10, 0x56, 0xb3, 0x16, 0xca, 0xf6, 0xcc, 0x65, 0x7b,
0x77, 0x61, 0x83, 0x6a, 0xb5, 0xe0, 0x38, 0x4e, 0xdb, 0x38, 0x43, 0xe7, 0x6d, 0x65, 0x75, 0x75,
0x4c, 0xf5, 0x5c, 0x96, 0xff, 0x17, 0x96, 0x77, 0x45, 0x28, 0x46, 0x7c, 0xe1, 0xcd, 0xe1, 0xff,
0xe2, 0xc0, 0x4a, 0xa6, 0x63, 0xbc, 0xfb, 0x00, 0xca, 0x07, 0x84, 0x09, 0xf2, 0x9a, 0x70, 0xe3,
0x95, 0x3b, 0xeb, 0xd5, 0x97, 0x4a, 0x03, 0x4f, 0x34, 0xd1, 0x26, 0x94, 0xb9, 0xe2, 0x21, 0x59,
0xa2, 0xd6, 0x16, 0xa1, 0xcc, 0xff, 0x4d, 0xf4, 0x51, 0x13, 0x96, 0x62, 0x3a, 0xe0, 0xa6, 0x67,
0xfe, 0xbd, 0x08, 0xf7, 0x84, 0x0e, 0xb0, 0x52, 0xf4, 0x0f, 0x73, 0x50, 0xd4, 0x7b, 0xe8, 0x31,
0x14, 0xfb, 0xd1, 0x80, 0x70, 0xa1, 0xbd, 0x6a, 0xb7, 0xe4, 0x39, 0xfd, 0xf6, 0x70, 0xfd, 0xa6,
0x75, 0x10, 0xd3, 0x94, 0x24, 0xf2, 0xbd, 0x1a, 0x46, 0x09, 0x61, 0xbc, 0x39, 0xa0, 0xb7, 0x35,
0x24, 0xe8, 0xa8, 0x1f, 0x6c, 0x18, 0x24, 0x57, 0xa4, 0x8f, 0x5b, 0xd5, 0xf2, 0x17, 0xe3, 0xd2,
0x0c, 0xb2, 0x92, 0x93, 0x70, 0x48, 0xcc, 0xf5, 0xaa, 0xd6, 0xf2, 0xee, 0xef, 0xc9, 0x52, 0xed,
0xab, 0x57, 0x51, 0x19, 0x1b, 0x09, 0x6d, 0x42, 0x89, 0x8b, 0x90, 0xc9, 0x63, 0xa3, 0x70, 0xc6,
0x47, 0x4b, 0x06, 0x40, 0x9f, 0x42, 0xa5, 0x47, 0x87, 0x69, 0x4c, 0x24, 0xba, 0x78, 0x46, 0xf4,
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0x38, 0x81, 0xd9, 0x69, 0x28, 0xbd, 0x57, 0x1a, 0xca, 0xe7, 0x4e, 0x83, 0xff, 0x9b, 0x03, 0x95,
0x49, 0x95, 0x5b, 0xd1, 0x75, 0xde, 0x3b, 0xba, 0x53, 0x91, 0xc9, 0x5d, 0x2c, 0x32, 0xd7, 0xa0,
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0x14, 0xa1, 0xf2, 0xa3, 0x86, 0xd5, 0xda, 0xbf, 0x05, 0xe8, 0x49, 0xc4, 0xc5, 0x0b, 0x35, 0x7f,
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0x66, 0x4f, 0x0d, 0x35, 0xe6, 0x05, 0x1a, 0x38, 0x3d, 0xed, 0xb4, 0xfe, 0xca, 0x43, 0x69, 0x4b,
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0x13, 0x75, 0x8c, 0x7d, 0x8f, 0xa0, 0xa0, 0xe6, 0x49, 0x34, 0xe7, 0x18, 0xb4, 0x07, 0x4d, 0xef,
0xe4, 0xf9, 0x6c, 0xc3, 0x91, 0x4c, 0xea, 0x0e, 0x99, 0xc7, 0x64, 0xbf, 0xfe, 0xbc, 0xf5, 0x53,
0x2e, 0x1f, 0xb4, 0x03, 0x45, 0xd3, 0xce, 0xf3, 0x54, 0xed, 0x9b, 0xc2, 0xab, 0x2f, 0x56, 0xd0,
0x64, 0x1b, 0x0e, 0xda, 0x99, 0x3c, 0xe8, 0xe7, 0x99, 0x66, 0x97, 0x81, 0x77, 0xca, 0xf7, 0x86,
0xb3, 0xe1, 0xa0, 0x97, 0x50, 0xb5, 0x12, 0x8d, 0xe6, 0x24, 0x74, 0xb6, 0x6a, 0xbc, 0xff, 0x9d,
0xa2, 0xa5, 0x8d, 0x6d, 0xd7, 0xde, 0xbc, 0x5b, 0x73, 0x7e, 0x7f, 0xb7, 0xe6, 0xfc, 0xf9, 0x6e,
0xcd, 0xe9, 0x16, 0x55, 0xdd, 0xff, 0xff, 0x9f, 0x00, 0x00, 0x00, 0xff, 0xff, 0x5d, 0x51, 0xa3,
0x94, 0xc5, 0x10, 0x00, 0x00,
}
// Reference imports to suppress errors if they are not otherwise used.
@ -1750,6 +1760,15 @@ func (m *UsageRecord) MarshalToSizedBuffer(dAtA []byte) (int, error) {
i -= len(m.XXX_unrecognized)
copy(dAtA[i:], m.XXX_unrecognized)
}
if len(m.Parents) > 0 {
for iNdEx := len(m.Parents) - 1; iNdEx >= 0; iNdEx-- {
i -= len(m.Parents[iNdEx])
copy(dAtA[i:], m.Parents[iNdEx])
i = encodeVarintControl(dAtA, i, uint64(len(m.Parents[iNdEx])))
i--
dAtA[i] = 0x62
}
}
if m.Shared {
i--
if m.Shared {
@ -2736,6 +2755,12 @@ func (m *UsageRecord) Size() (n int) {
if m.Shared {
n += 2
}
if len(m.Parents) > 0 {
for _, s := range m.Parents {
l = len(s)
n += 1 + l + sovControl(uint64(l))
}
}
if m.XXX_unrecognized != nil {
n += len(m.XXX_unrecognized)
}
@ -3740,6 +3765,38 @@ func (m *UsageRecord) Unmarshal(dAtA []byte) error {
}
}
m.Shared = bool(v != 0)
case 12:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Parents", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowControl
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
stringLen |= uint64(b&0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthControl
}
postIndex := iNdEx + intStringLen
if postIndex < 0 {
return ErrInvalidLengthControl
}
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.Parents = append(m.Parents, string(dAtA[iNdEx:postIndex]))
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipControl(dAtA[iNdEx:])

3
api/services/control/control.proto
View File

@ -41,13 +41,14 @@ message UsageRecord {
bool Mutable = 2;
bool InUse = 3;
int64 Size = 4;
string Parent = 5;
string Parent = 5 [deprecated=true];
google.protobuf.Timestamp CreatedAt = 6 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
google.protobuf.Timestamp LastUsedAt = 7 [(gogoproto.stdtime) = true];
int64 UsageCount = 8;
string Description = 9;
string RecordType = 10;
bool Shared = 11;
repeated string Parents = 12;
}
message SolveRequest {

72
cache/blobs.go vendored
View File

@ -54,12 +54,20 @@ type compressor func(dest io.Writer, requiredMediaType string) (io.WriteCloser,
func computeBlobChain(ctx context.Context, sr *immutableRef, createIfNeeded bool, compressionType compression.Type, forceCompression bool, s session.Group) error {
eg, ctx := errgroup.WithContext(ctx)
if sr.parent != nil {
switch sr.kind() {
case Merge:
for _, parent := range sr.mergeParents {
parent := parent
eg.Go(func() error {
return computeBlobChain(ctx, sr.parent, createIfNeeded, compressionType, forceCompression, s)
return computeBlobChain(ctx, parent, createIfNeeded, compressionType, forceCompression, s)
})
}
case Layer:
eg.Go(func() error {
return computeBlobChain(ctx, sr.layerParent, createIfNeeded, compressionType, forceCompression, s)
})
fallthrough
case BaseLayer:
eg.Go(func() error {
_, err := g.Do(ctx, fmt.Sprintf("%s-%t", sr.ID(), createIfNeeded), func(ctx context.Context) (interface{}, error) {
if sr.getBlob() != "" {
@ -88,8 +96,8 @@ func computeBlobChain(ctx context.Context, sr *immutableRef, createIfNeeded bool
}
var lower []mount.Mount
if sr.parent != nil {
m, err := sr.parent.Mount(ctx, true, s)
if sr.layerParent != nil {
m, err := sr.layerParent.Mount(ctx, true, s)
if err != nil {
return nil, err
}
@ -125,7 +133,7 @@ func computeBlobChain(ctx context.Context, sr *immutableRef, createIfNeeded bool
fallback = false // prohibit fallback on debug
} else if !isTypeWindows(sr) {
enableOverlay, fallback = true, true
switch sr.cm.ManagerOpt.Snapshotter.Name() {
switch sr.cm.Snapshotter.Name() {
case "overlayfs", "stargz":
// overlayfs-based snapshotters should support overlay diff. so print warn log on failure.
logWarnOnErr = true
@ -178,7 +186,6 @@ func computeBlobChain(ctx context.Context, sr *immutableRef, createIfNeeded bool
desc.Annotations[k] = v
}
}
info, err := sr.cm.ContentStore.Info(ctx, desc.Digest)
if err != nil {
return nil, err
@ -195,12 +202,12 @@ func computeBlobChain(ctx context.Context, sr *immutableRef, createIfNeeded bool
if err := sr.setBlob(ctx, compressionType, desc); err != nil {
return nil, err
}
return nil, nil
})
if err != nil {
return err
}
if forceCompression {
if err := ensureCompression(ctx, sr, compressionType, s); err != nil {
return errors.Wrapf(err, "failed to ensure compression type of %q", compressionType)
@ -208,16 +215,16 @@ func computeBlobChain(ctx context.Context, sr *immutableRef, createIfNeeded bool
}
return nil
})
}
if err := eg.Wait(); err != nil {
return err
}
return sr.setChains(ctx)
return sr.computeChainMetadata(ctx)
}
// setBlob associates a blob with the cache record.
// A lease must be held for the blob when calling this function
// Caller should call Info() for knowing what current values are actually set
func (sr *immutableRef) setBlob(ctx context.Context, compressionType compression.Type, desc ocispecs.Descriptor) error {
if _, ok := leases.FromContext(ctx); !ok {
return errors.Errorf("missing lease requirement for setBlob")
@ -267,9 +274,9 @@ func (sr *immutableRef) setBlob(ctx context.Context, compressionType compression
return nil
}
func (sr *immutableRef) setChains(ctx context.Context) error {
func (sr *immutableRef) computeChainMetadata(ctx context.Context) error {
if _, ok := leases.FromContext(ctx); !ok {
return errors.Errorf("missing lease requirement for setChains")
return errors.Errorf("missing lease requirement for computeChainMetadata")
}
sr.mu.Lock()
@ -281,13 +288,37 @@ func (sr *immutableRef) setChains(ctx context.Context) error {
var chainIDs []digest.Digest
var blobChainIDs []digest.Digest
if sr.parent != nil {
chainIDs = append(chainIDs, digest.Digest(sr.parent.getChainID()))
blobChainIDs = append(blobChainIDs, digest.Digest(sr.parent.getBlobChainID()))
// Blobs should be set the actual layers in the ref's chain, no
// any merge refs.
layerChain := sr.layerChain()
var layerParent *cacheRecord
switch sr.kind() {
case Merge:
layerParent = layerChain[len(layerChain)-1].cacheRecord
case Layer:
// skip the last layer in the chain, which is this ref itself
layerParent = layerChain[len(layerChain)-2].cacheRecord
}
if layerParent != nil {
if parentChainID := layerParent.getChainID(); parentChainID != "" {
chainIDs = append(chainIDs, parentChainID)
} else {
return errors.Errorf("failed to set chain for reference with non-addressable parent")
}
if parentBlobChainID := layerParent.getBlobChainID(); parentBlobChainID != "" {
blobChainIDs = append(blobChainIDs, parentBlobChainID)
} else {
return errors.Errorf("failed to set blobchain for reference with non-addressable parent")
}
}
switch sr.kind() {
case Layer, BaseLayer:
diffID := digest.Digest(sr.getDiffID())
chainIDs = append(chainIDs, diffID)
blobChainIDs = append(blobChainIDs, imagespecidentity.ChainID([]digest.Digest{digest.Digest(sr.getBlob()), diffID}))
}
chainID := imagespecidentity.ChainID(chainIDs)
blobChainID := imagespecidentity.ChainID(blobChainIDs)
@ -304,8 +335,15 @@ func isTypeWindows(sr *immutableRef) bool {
if sr.GetLayerType() == "windows" {
return true
}
if parent := sr.parent; parent != nil {
return isTypeWindows(parent)
switch sr.kind() {
case Merge:
for _, p := range sr.mergeParents {
if isTypeWindows(p) {
return true
}
}
case Layer:
return isTypeWindows(sr.layerParent)
}
return false
}

10
cache/contenthash/checksum_test.go vendored
View File

@ -13,6 +13,8 @@ import (
"time"
"github.com/containerd/containerd/content/local"
"github.com/containerd/containerd/diff/apply"
"github.com/containerd/containerd/diff/walking"
ctdmetadata "github.com/containerd/containerd/metadata"
"github.com/containerd/containerd/snapshots"
"github.com/containerd/containerd/snapshots/native"
@ -22,6 +24,7 @@ import (
"github.com/moby/buildkit/snapshot"
containerdsnapshot "github.com/moby/buildkit/snapshot/containerd"
"github.com/moby/buildkit/util/leaseutil"
"github.com/moby/buildkit/util/winlayers"
digest "github.com/opencontainers/go-digest"
"github.com/pkg/errors"
"github.com/stretchr/testify/require"
@ -1209,12 +1212,17 @@ func setupCacheManager(t *testing.T, tmpdir string, snapshotterName string, snap
md, err := metadata.NewStore(filepath.Join(tmpdir, "metadata.db"))
require.NoError(t, err)
lm := leaseutil.WithNamespace(ctdmetadata.NewLeaseManager(mdb), "buildkit")
c := mdb.ContentStore()
applier := winlayers.NewFileSystemApplierWithWindows(c, apply.NewFileSystemApplier(c))
differ := winlayers.NewWalkingDiffWithWindows(c, walking.NewWalkingDiff(c))
cm, err := cache.NewManager(cache.ManagerOpt{
Snapshotter: snapshot.FromContainerdSnapshotter(snapshotterName, containerdsnapshot.NSSnapshotter("buildkit", mdb.Snapshotter(snapshotterName)), nil),
MetadataStore: md,
LeaseManager: lm,
ContentStore: mdb.ContentStore(),
ContentStore: c,
Applier: applier,
Differ: differ,
GarbageCollect: mdb.GarbageCollect,
})
require.NoError(t, err)

318
cache/manager.go vendored
View File

@ -3,6 +3,7 @@ package cache
import (
"context"
"sort"
"strings"
"sync"
"time"
@ -18,6 +19,7 @@ import (
"github.com/moby/buildkit/identity"
"github.com/moby/buildkit/session"
"github.com/moby/buildkit/snapshot"
"github.com/moby/buildkit/util/bklog"
"github.com/moby/buildkit/util/flightcontrol"
digest "github.com/opencontainers/go-digest"
imagespecidentity "github.com/opencontainers/image-spec/identity"
@ -53,6 +55,7 @@ type Accessor interface {
New(ctx context.Context, parent ImmutableRef, s session.Group, opts ...RefOption) (MutableRef, error)
GetMutable(ctx context.Context, id string, opts ...RefOption) (MutableRef, error) // Rebase?
IdentityMapping() *idtools.IdentityMapping
Merge(ctx context.Context, parents []ImmutableRef, opts ...RefOption) (ImmutableRef, error)
}
type Controller interface {
@ -75,7 +78,14 @@ type ExternalRefChecker interface {
type cacheManager struct {
records map[string]*cacheRecord
mu sync.Mutex
ManagerOpt
Snapshotter snapshot.MergeSnapshotter
ContentStore content.Store
LeaseManager leases.Manager
PruneRefChecker ExternalRefCheckerFunc
GarbageCollect func(ctx context.Context) (gc.Stats, error)
Applier diff.Applier
Differ diff.Comparer
MetadataStore *metadata.Store
muPrune sync.Mutex // make sure parallel prune is not allowed so there will not be inconsistent results
unlazyG flightcontrol.Group
@ -83,7 +93,14 @@ type cacheManager struct {
func NewManager(opt ManagerOpt) (Manager, error) {
cm := &cacheManager{
ManagerOpt: opt,
Snapshotter: snapshot.NewMergeSnapshotter(context.TODO(), opt.Snapshotter, opt.LeaseManager),
ContentStore: opt.ContentStore,
LeaseManager: opt.LeaseManager,
PruneRefChecker: opt.PruneRefChecker,
GarbageCollect: opt.GarbageCollect,
Applier: opt.Applier,
Differ: opt.Differ,
MetadataStore: opt.MetadataStore,
records: make(map[string]*cacheRecord),
}
@ -114,7 +131,6 @@ func (cm *cacheManager) GetByBlob(ctx context.Context, desc ocispecs.Descriptor,
}
var p *immutableRef
var parentID string
if parent != nil {
p2, err := cm.Get(ctx, parent.ID(), NoUpdateLastUsed, descHandlers)
if err != nil {
@ -122,18 +138,17 @@ func (cm *cacheManager) GetByBlob(ctx context.Context, desc ocispecs.Descriptor,
}
p = p2.(*immutableRef)
if err := p.Finalize(ctx); err != nil {
p.Release(context.TODO())
return nil, err
}
if p.getChainID() == "" || p.getBlobChainID() == "" {
p.Release(context.TODO())
return nil, errors.Errorf("failed to get ref by blob on non-addressable parent")
}
chainID = imagespecidentity.ChainID([]digest.Digest{p.getChainID(), chainID})
blobChainID = imagespecidentity.ChainID([]digest.Digest{p.getBlobChainID(), blobChainID})
if err := p.Finalize(ctx); err != nil {
p.Release(context.TODO())
return nil, err
}
parentID = p.ID()
}
releaseParent := false
@ -195,7 +210,7 @@ func (cm *cacheManager) GetByBlob(ctx context.Context, desc ocispecs.Descriptor,
go link.Release(context.TODO())
}
l, err := cm.ManagerOpt.LeaseManager.Create(ctx, func(l *leases.Lease) error {
l, err := cm.LeaseManager.Create(ctx, func(l *leases.Lease) error {
l.ID = id
l.Labels = map[string]string{
"containerd.io/gc.flat": time.Now().UTC().Format(time.RFC3339Nano),
@ -208,7 +223,7 @@ func (cm *cacheManager) GetByBlob(ctx context.Context, desc ocispecs.Descriptor,
defer func() {
if rerr != nil {
if err := cm.ManagerOpt.LeaseManager.Delete(context.TODO(), leases.Lease{
if err := cm.LeaseManager.Delete(context.TODO(), leases.Lease{
ID: l.ID,
}); err != nil {
logrus.Errorf("failed to remove lease: %+v", err)
@ -224,7 +239,7 @@ func (cm *cacheManager) GetByBlob(ctx context.Context, desc ocispecs.Descriptor,
}
if desc.Digest != "" {
if err := cm.ManagerOpt.LeaseManager.AddResource(ctx, leases.Lease{ID: id}, leases.Resource{
if err := cm.LeaseManager.AddResource(ctx, leases.Lease{ID: id}, leases.Resource{
ID: desc.Digest.String(),
Type: "content",
}); err != nil {
@ -238,11 +253,11 @@ func (cm *cacheManager) GetByBlob(ctx context.Context, desc ocispecs.Descriptor,
mu: &sync.Mutex{},
cm: cm,
refs: make(map[ref]struct{}),
parent: p,
parentRefs: parentRefs{layerParent: p},
cacheMetadata: md,
}
if err := initializeMetadata(rec.cacheMetadata, parentID, opts...); err != nil {
if err := initializeMetadata(rec.cacheMetadata, rec.parentRefs, opts...); err != nil {
return nil, err
}
@ -342,18 +357,16 @@ func (cm *cacheManager) getRecord(ctx context.Context, id string, opts ...RefOpt
checkLazyProviders := func(rec *cacheRecord) error {
missing := NeedsRemoteProvidersError(nil)
dhs := descHandlersOf(opts...)
for {
blob := rec.getBlob()
if isLazy, err := rec.isLazy(ctx); err != nil {
if err := rec.walkUniqueAncestors(func(cr *cacheRecord) error {
blob := cr.getBlob()
if isLazy, err := cr.isLazy(ctx); err != nil {
return err
} else if isLazy && dhs[blob] == nil {
missing = append(missing, blob)
}
if rec.parent == nil {
break
}
rec = rec.parent.cacheRecord
return nil
}); err != nil {
return err
}
if len(missing) > 0 {
return missing
@ -375,6 +388,17 @@ func (cm *cacheManager) getRecord(ctx context.Context, id string, opts ...RefOpt
if !ok {
return nil, errors.Wrap(errNotFound, id)
}
parents, err := cm.parentsOf(ctx, md, opts...)
if err != nil {
return nil, errors.Wrapf(err, "failed to get parents")
}
defer func() {
if retErr != nil {
parents.release(context.TODO())
}
}()
if mutableID := md.getEqualMutable(); mutableID != "" {
mutable, err := cm.getRecord(ctx, mutableID)
if err != nil {
@ -385,16 +409,11 @@ func (cm *cacheManager) getRecord(ctx context.Context, id string, opts ...RefOpt
return nil, err
}
// parent refs are possibly lazy so keep it hold the description handlers.
var dhs DescHandlers
if mutable.parent != nil {
dhs = mutable.parent.descHandlers
}
rec := &cacheRecord{
mu: &sync.Mutex{},
cm: cm,
refs: make(map[ref]struct{}),
parent: mutable.parentRef(false, dhs),
parentRefs: parents,
cacheMetadata: md,
equalMutable: &mutableRef{cacheRecord: mutable},
}
@ -403,28 +422,12 @@ func (cm *cacheManager) getRecord(ctx context.Context, id string, opts ...RefOpt
return rec, nil
}
var parent *immutableRef
if parentID := md.getParent(); parentID != "" {
var err error
parent, err = cm.get(ctx, parentID, append(opts, NoUpdateLastUsed)...)
if err != nil {
return nil, err
}
defer func() {
if retErr != nil {
parent.mu.Lock()
parent.release(context.TODO())
parent.mu.Unlock()
}
}()
}
rec := &cacheRecord{
mu: &sync.Mutex{},
mutable: !md.getCommitted(),
cm: cm,
refs: make(map[ref]struct{}),
parent: parent,
parentRefs: parents,
cacheMetadata: md,
}
@ -436,7 +439,7 @@ func (cm *cacheManager) getRecord(ctx context.Context, id string, opts ...RefOpt
return nil, errors.Wrapf(errNotFound, "failed to get deleted record %s", id)
}
if err := initializeMetadata(rec.cacheMetadata, md.getParent(), opts...); err != nil {
if err := initializeMetadata(rec.cacheMetadata, rec.parentRefs, opts...); err != nil {
return nil, err
}
@ -451,11 +454,29 @@ func (cm *cacheManager) getRecord(ctx context.Context, id string, opts ...RefOpt
return rec, nil
}
func (cm *cacheManager) parentsOf(ctx context.Context, md *cacheMetadata, opts ...RefOption) (ps parentRefs, rerr error) {
if parentID := md.getParent(); parentID != "" {
p, err := cm.get(ctx, parentID, append(opts, NoUpdateLastUsed))
if err != nil {
return ps, err
}
ps.layerParent = p
return ps, nil
}
for _, parentID := range md.getMergeParents() {
p, err := cm.get(ctx, parentID, append(opts, NoUpdateLastUsed))
if err != nil {
return ps, err
}
ps.mergeParents = append(ps.mergeParents, p)
}
return ps, nil
}
func (cm *cacheManager) New(ctx context.Context, s ImmutableRef, sess session.Group, opts ...RefOption) (mr MutableRef, err error) {
id := identity.NewID()
var parent *immutableRef
var parentID string
var parentSnapshotID string
if s != nil {
if _, ok := s.(*immutableRef); ok {
@ -474,7 +495,6 @@ func (cm *cacheManager) New(ctx context.Context, s ImmutableRef, sess session.Gr
return nil, err
}
parentSnapshotID = parent.getSnapshotID()
parentID = parent.ID()
}
defer func() {
@ -483,7 +503,7 @@ func (cm *cacheManager) New(ctx context.Context, s ImmutableRef, sess session.Gr
}
}()
l, err := cm.ManagerOpt.LeaseManager.Create(ctx, func(l *leases.Lease) error {
l, err := cm.LeaseManager.Create(ctx, func(l *leases.Lease) error {
l.ID = id
l.Labels = map[string]string{
"containerd.io/gc.flat": time.Now().UTC().Format(time.RFC3339Nano),
@ -496,7 +516,7 @@ func (cm *cacheManager) New(ctx context.Context, s ImmutableRef, sess session.Gr
defer func() {
if err != nil {
if err := cm.ManagerOpt.LeaseManager.Delete(context.TODO(), leases.Lease{
if err := cm.LeaseManager.Delete(context.TODO(), leases.Lease{
ID: l.ID,
}); err != nil {
logrus.Errorf("failed to remove lease: %+v", err)
@ -505,7 +525,7 @@ func (cm *cacheManager) New(ctx context.Context, s ImmutableRef, sess session.Gr
}()
snapshotID := id
if err := cm.LeaseManager.AddResource(ctx, leases.Lease{ID: id}, leases.Resource{
if err := cm.LeaseManager.AddResource(ctx, l, leases.Resource{
ID: snapshotID,
Type: "snapshots/" + cm.Snapshotter.Name(),
}); err != nil && !errdefs.IsAlreadyExists(err) {
@ -522,7 +542,7 @@ func (cm *cacheManager) New(ctx context.Context, s ImmutableRef, sess session.Gr
err = cm.Snapshotter.Prepare(ctx, snapshotID, parentSnapshotID)
}
if err != nil {
return nil, errors.Wrapf(err, "failed to prepare %s", parentSnapshotID)
return nil, errors.Wrapf(err, "failed to prepare %v as %s", parentSnapshotID, snapshotID)
}
cm.mu.Lock()
@ -535,12 +555,12 @@ func (cm *cacheManager) New(ctx context.Context, s ImmutableRef, sess session.Gr
mutable: true,
cm: cm,
refs: make(map[ref]struct{}),
parent: parent,
parentRefs: parentRefs{layerParent: parent},
cacheMetadata: md,
}
opts = append(opts, withSnapshotID(snapshotID))
if err := initializeMetadata(rec.cacheMetadata, parentID, opts...); err != nil {
if err := initializeMetadata(rec.cacheMetadata, rec.parentRefs, opts...); err != nil {
return nil, err
}
@ -591,6 +611,128 @@ func (cm *cacheManager) GetMutable(ctx context.Context, id string, opts ...RefOp
return rec.mref(true, descHandlersOf(opts...)), nil
}
func (cm *cacheManager) Merge(ctx context.Context, inputParents []ImmutableRef, opts ...RefOption) (ir ImmutableRef, rerr error) {
// TODO:(sipsma) optimize merge further by
// * Removing repeated occurrences of input layers (only leaving the uppermost)
// * Reusing existing merges that are equivalent to this one
// * Reusing existing merges that can be used as a base for this one
// * Calculating diffs only once (across both merges and during computeBlobChain). Save diff metadata so it can be reapplied.
// These optimizations may make sense here in cache, in the snapshotter or both.
// Be sure that any optimizations handle existing pre-optimization refs correctly.
id := identity.NewID()
parents := parentRefs{mergeParents: make([]*immutableRef, 0, len(inputParents))}
dhs := make(map[digest.Digest]*DescHandler)
defer func() {
if rerr != nil {
parents.release(context.TODO())
}
}()
for _, inputParent := range inputParents {
if inputParent == nil {
continue
}
var parent *immutableRef
if p, ok := inputParent.(*immutableRef); ok {
parent = p
} else {
// inputParent implements ImmutableRef but isn't our internal struct, get an instance of the internal struct
// by calling Get on its ID.
p, err := cm.Get(ctx, inputParent.ID(), append(opts, NoUpdateLastUsed)...)
if err != nil {
return nil, err
}
parent = p.(*immutableRef)
defer parent.Release(context.TODO())
}
switch parent.kind() {
case Merge:
// if parent is itself a merge, flatten it out by just setting our parents directly to its parents
for _, grandparent := range parent.mergeParents {
parents.mergeParents = append(parents.mergeParents, grandparent.clone())
}
case Layer, BaseLayer:
parents.mergeParents = append(parents.mergeParents, parent.clone())
}
for dgst, handler := range parent.descHandlers {
dhs[dgst] = handler
}
}
if len(parents.mergeParents) == 0 {
// merge of nothing is nothing
return nil, nil
}
if len(parents.mergeParents) == 1 {
// merge of 1 thing is that thing
return parents.mergeParents[0], nil
}
for _, parent := range parents.mergeParents {
if err := parent.Finalize(ctx); err != nil {
return nil, errors.Wrapf(err, "failed to finalize parent during merge")
}
}
cm.mu.Lock()
defer cm.mu.Unlock()
// Build the new ref
md, _ := cm.getMetadata(id)
rec := &cacheRecord{
mu: &sync.Mutex{},
mutable: false,
cm: cm,
cacheMetadata: md,
parentRefs: parents,
refs: make(map[ref]struct{}),
}
if err := initializeMetadata(rec.cacheMetadata, rec.parentRefs, opts...); err != nil {
return nil, err
}
snapshotID := id
l, err := cm.LeaseManager.Create(ctx, func(l *leases.Lease) error {
l.ID = id
l.Labels = map[string]string{
"containerd.io/gc.flat": time.Now().UTC().Format(time.RFC3339Nano),
}
return nil
})
if err != nil {
return nil, errors.Wrap(err, "failed to create lease")
}
defer func() {
if rerr != nil {
if err := cm.LeaseManager.Delete(context.TODO(), leases.Lease{
ID: l.ID,
}); err != nil {
bklog.G(ctx).Errorf("failed to remove lease: %+v", err)
}
}
}()
if err := cm.LeaseManager.AddResource(ctx, leases.Lease{ID: id}, leases.Resource{
ID: snapshotID,
Type: "snapshots/" + cm.Snapshotter.Name(),
}); err != nil {
return nil, err
}
rec.queueSnapshotID(snapshotID)
if err := rec.commitMetadata(); err != nil {
return nil, err
}
cm.records[id] = rec
return rec.ref(true, dhs), nil
}
func (cm *cacheManager) Prune(ctx context.Context, ch chan client.UsageInfo, opts ...client.PruneInfo) error {
cm.muPrune.Lock()
@ -690,7 +832,7 @@ func (cm *cacheManager) prune(ctx context.Context, ch chan client.UsageInfo, opt
shared := false
if opt.checkShared != nil {
shared = opt.checkShared.Exists(cr.ID(), cr.parentChain())
shared = opt.checkShared.Exists(cr.ID(), cr.layerDigestChain())
}
if !opt.all {
@ -806,8 +948,14 @@ func (cm *cacheManager) prune(ctx context.Context, ch chan client.UsageInfo, opt
UsageCount: usageCount,
}
if cr.parent != nil {
c.Parent = cr.parent.ID()
switch cr.kind() {
case Layer:
c.Parents = []string{cr.layerParent.ID()}
case Merge:
c.Parents = make([]string, len(cr.mergeParents))
for i, p := range cr.mergeParents {
c.Parents[i] = p.ID()
}
}
if c.Size == sizeUnknown && cr.equalImmutable != nil {
c.Size = cr.equalImmutable.getSize() // benefit from DiskUsage calc
@ -851,12 +999,15 @@ func (cm *cacheManager) markShared(m map[string]*cacheUsageInfo) error {
return errors.WithStack(err)
}
var markAllParentsShared func(string)
markAllParentsShared = func(id string) {
var markAllParentsShared func(...string)
markAllParentsShared = func(ids ...string) {
for _, id := range ids {
if id == "" {
continue
}
if v, ok := m[id]; ok {
v.shared = true
if v.parent != "" {
markAllParentsShared(v.parent)
markAllParentsShared(v.parents...)
}
}
}
@ -874,7 +1025,7 @@ func (cm *cacheManager) markShared(m map[string]*cacheUsageInfo) error {
type cacheUsageInfo struct {
refs int
parent string
parents []string
size int64
mutable bool
createdAt time.Time
@ -917,13 +1068,20 @@ func (cm *cacheManager) DiskUsage(ctx context.Context, opt client.DiskUsageInfo)
description: cr.GetDescription(),
doubleRef: cr.equalImmutable != nil,
recordType: cr.GetRecordType(),
parentChain: cr.parentChain(),
parentChain: cr.layerDigestChain(),
}
if c.recordType == "" {
c.recordType = client.UsageRecordTypeRegular
}
if cr.parent != nil {
c.parent = cr.parent.ID()
switch cr.kind() {
case Layer:
c.parents = []string{cr.layerParent.ID()}
case Merge:
c.parents = make([]string, len(cr.mergeParents))
for i, p := range cr.mergeParents {
c.parents[i] = p.ID()
}
}
if cr.mutable && c.refs > 0 {
c.size = 0 // size can not be determined because it is changing
@ -940,12 +1098,14 @@ func (cm *cacheManager) DiskUsage(ctx context.Context, opt client.DiskUsageInfo)
}
for id := range rescan {
v := m[id]
if v.refs == 0 && v.parent != "" {
m[v.parent].refs--
if v.refs == 0 {
for _, p := range v.parents {
m[p].refs--
if v.doubleRef {
m[v.parent].refs--
m[p].refs--
}
rescan[p] = struct{}{}
}
rescan[v.parent] = struct{}{}
}
delete(rescan, id)
}
@ -962,7 +1122,7 @@ func (cm *cacheManager) DiskUsage(ctx context.Context, opt client.DiskUsageInfo)
Mutable: cr.mutable,
InUse: cr.refs > 0,
Size: cr.size,
Parent: cr.parent,
Parents: cr.parents,
CreatedAt: cr.createdAt,
Description: cr.description,
LastUsedAt: cr.lastUsedAt,
@ -1079,14 +1239,24 @@ func withSnapshotID(id string) RefOption {
})
}
func initializeMetadata(m *cacheMetadata, parent string, opts ...RefOption) error {
func initializeMetadata(m *cacheMetadata, parents parentRefs, opts ...RefOption) error {
if tm := m.GetCreatedAt(); !tm.IsZero() {
return nil
}
if err := m.queueParent(parent); err != nil {
if parents.layerParent != nil {
if err := m.queueParent(parents.layerParent.ID()); err != nil {
return err
}
} else if len(parents.mergeParents) > 0 {
var ids []string
for _, p := range parents.mergeParents {
ids = append(ids, p.ID())
}
if err := m.queueMergeParents(ids); err != nil {
return err
}
}
if err := m.queueCreatedAt(time.Now()); err != nil {
return err
@ -1112,8 +1282,8 @@ func adaptUsageInfo(info *client.UsageInfo) filters.Adaptor {
switch fieldpath[0] {
case "id":
return info.ID, info.ID != ""
case "parent":
return info.Parent, info.Parent != ""
case "parents":
return strings.Join(info.Parents, ";"), len(info.Parents) > 0
case "description":
return info.Description, info.Description != ""
case "inuse":

134
cache/manager_test.go vendored
View File

@ -29,6 +29,7 @@ import (
"github.com/containerd/containerd/namespaces"
"github.com/containerd/containerd/snapshots"
"github.com/containerd/containerd/snapshots/native"
"github.com/containerd/continuity/fs/fstest"
"github.com/containerd/stargz-snapshotter/estargz"
"github.com/klauspost/compress/zstd"
"github.com/moby/buildkit/cache/metadata"
@ -128,8 +129,11 @@ func newCacheManager(ctx context.Context, opt cmOpt) (co *cmOut, cleanup func()
return nil, nil, err
}
store = containerdsnapshot.NewContentStore(mdb.ContentStore(), ns)
c := mdb.ContentStore()
store = containerdsnapshot.NewContentStore(c, ns)
lm := leaseutil.WithNamespace(ctdmetadata.NewLeaseManager(mdb), ns)
applier := winlayers.NewFileSystemApplierWithWindows(store, apply.NewFileSystemApplier(store))
differ := winlayers.NewWalkingDiffWithWindows(store, walking.NewWalkingDiff(store))
md, err := metadata.NewStore(filepath.Join(tmpdir, "metadata.db"))
if err != nil {
@ -142,8 +146,8 @@ func newCacheManager(ctx context.Context, opt cmOpt) (co *cmOut, cleanup func()
ContentStore: store,
LeaseManager: lm,
GarbageCollect: mdb.GarbageCollect,
Applier: winlayers.NewFileSystemApplierWithWindows(store, apply.NewFileSystemApplier(store)),
Differ: winlayers.NewWalkingDiffWithWindows(store, walking.NewWalkingDiff(store)),
Applier: applier,
Differ: differ,
})
if err != nil {
return nil, nil, err
@ -529,7 +533,7 @@ func TestExtractOnMutable(t *testing.T) {
err = snap.(*immutableRef).setBlob(leaseCtx, compressionType, desc)
done(context.TODO())
require.NoError(t, err)
err = snap.(*immutableRef).setChains(leaseCtx)
err = snap.(*immutableRef).computeChainMetadata(leaseCtx)
require.NoError(t, err)
snap2, err := cm.GetByBlob(ctx, desc2, snap)
@ -652,7 +656,7 @@ func TestSetBlob(t *testing.T) {
}
err = snap.(*immutableRef).setBlob(ctx, compressionType, desc)
require.NoError(t, err)
err = snap.(*immutableRef).setChains(ctx)
err = snap.(*immutableRef).computeChainMetadata(ctx)
require.NoError(t, err)
snapRef = snap.(*immutableRef)
@ -682,7 +686,7 @@ func TestSetBlob(t *testing.T) {
}
err = snap2.(*immutableRef).setBlob(ctx, compressionType2, desc2)
require.NoError(t, err)
err = snap2.(*immutableRef).setChains(ctx)
err = snap2.(*immutableRef).computeChainMetadata(ctx)
require.NoError(t, err)
snapRef2 := snap2.(*immutableRef)
@ -1273,7 +1277,7 @@ func TestGetRemotes(t *testing.T) {
require.NoError(t, err)
require.Equal(t, 1, len(remotes))
remote := remotes[0]
refChain := ir.parentRefChain()
refChain := ir.layerChain()
for i, desc := range remote.Descriptors {
switch compressionType {
case compression.Uncompressed:
@ -1494,6 +1498,122 @@ func checkDescriptor(ctx context.Context, t *testing.T, cs content.Store, desc o
}
}
func TestMergeOp(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("Depends on unimplemented merge-op support on Windows")
}
// This just tests the basic Merge method and some of the logic with releasing merge refs.
// Tests for the fs merge logic are in client_test and snapshotter_test.
t.Parallel()
ctx := namespaces.WithNamespace(context.Background(), "buildkit-test")
tmpdir, err := ioutil.TempDir("", "cachemanager")
require.NoError(t, err)
defer os.RemoveAll(tmpdir)
snapshotter, err := native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
require.NoError(t, err)
co, cleanup, err := newCacheManager(ctx, cmOpt{
snapshotter: snapshotter,
snapshotterName: "native",
})
require.NoError(t, err)
defer cleanup()
cm := co.manager
emptyMerge, err := cm.Merge(ctx, nil)
require.NoError(t, err)
require.Nil(t, emptyMerge)
var baseRefs []ImmutableRef
for i := 0; i < 6; i++ {
active, err := cm.New(ctx, nil, nil)
require.NoError(t, err)
m, err := active.Mount(ctx, false, nil)
require.NoError(t, err)
lm := snapshot.LocalMounter(m)
target, err := lm.Mount()
require.NoError(t, err)
err = fstest.Apply(
fstest.CreateFile(strconv.Itoa(i), []byte(strconv.Itoa(i)), 0777),
).Apply(target)
require.NoError(t, err)
err = lm.Unmount()
require.NoError(t, err)
snap, err := active.Commit(ctx)
require.NoError(t, err)
baseRefs = append(baseRefs, snap)
size, err := snap.(*immutableRef).size(ctx)
require.NoError(t, err)
require.EqualValues(t, 8192, size)
}
singleMerge, err := cm.Merge(ctx, baseRefs[:1])
require.NoError(t, err)
m, err := singleMerge.Mount(ctx, true, nil)
require.NoError(t, err)
ms, unmount, err := m.Mount()
require.NoError(t, err)
require.Len(t, ms, 1)
require.Equal(t, ms[0].Type, "bind")
err = fstest.CheckDirectoryEqualWithApplier(ms[0].Source, fstest.Apply(
fstest.CreateFile(strconv.Itoa(0), []byte(strconv.Itoa(0)), 0777),
))
require.NoError(t, err)
require.NoError(t, unmount())
require.NoError(t, singleMerge.Release(ctx))
err = cm.Prune(ctx, nil, client.PruneInfo{Filter: []string{
"id==" + singleMerge.ID(),
}})
require.NoError(t, err)
merge1, err := cm.Merge(ctx, baseRefs[:3])
require.NoError(t, err)
_, err = merge1.Mount(ctx, true, nil)
require.NoError(t, err)
size1, err := merge1.(*immutableRef).size(ctx)
require.NoError(t, err)
require.EqualValues(t, 4096, size1) // hardlinking means all but the first snapshot doesn't take up space
checkDiskUsage(ctx, t, cm, 7, 0)
merge2, err := cm.Merge(ctx, baseRefs[3:])
require.NoError(t, err)
_, err = merge2.Mount(ctx, true, nil)
require.NoError(t, err)
size2, err := merge2.(*immutableRef).size(ctx)
require.NoError(t, err)
require.EqualValues(t, 4096, size2)
checkDiskUsage(ctx, t, cm, 8, 0)
for _, ref := range baseRefs {
require.NoError(t, ref.Release(ctx))
}
checkDiskUsage(ctx, t, cm, 8, 0)
// should still be able to use merges based on released refs
merge3, err := cm.Merge(ctx, []ImmutableRef{merge1, merge2})
require.NoError(t, err)
require.NoError(t, merge1.Release(ctx))
require.NoError(t, merge2.Release(ctx))
_, err = merge3.Mount(ctx, true, nil)
require.NoError(t, err)
size3, err := merge3.(*immutableRef).size(ctx)
require.NoError(t, err)
require.EqualValues(t, 4096, size3)
require.Len(t, merge3.(*immutableRef).mergeParents, 6)
checkDiskUsage(ctx, t, cm, 7, 2)
require.NoError(t, merge3.Release(ctx))
checkDiskUsage(ctx, t, cm, 0, 9)
err = cm.Prune(ctx, nil, client.PruneInfo{All: true})
require.NoError(t, err)
checkDiskUsage(ctx, t, cm, 0, 0)
}
func checkDiskUsage(ctx context.Context, t *testing.T, cm Manager, inuse, unused int) {
du, err := cm.DiskUsage(ctx, client.DiskUsageInfo{})
require.NoError(t, err)

9
cache/metadata.go vendored
View File

@ -24,6 +24,7 @@ const keyLayerType = "cache.layerType"
const keyRecordType = "cache.recordType"
const keyCommitted = "snapshot.committed"
const keyParent = "cache.parent"
const keyMergeParents = "cache.mergeParents"
const keyDiffID = "cache.diffID"
const keyChainID = "cache.chainID"
const keyBlobChainID = "cache.blobChainID"
@ -306,6 +307,14 @@ func (md *cacheMetadata) getParent() string {
return md.GetString(keyParent)
}
func (md *cacheMetadata) queueMergeParents(parents []string) error {
return md.queueValue(keyMergeParents, parents, "")
}
func (md *cacheMetadata) getMergeParents() []string {
return md.getStringSlice(keyMergeParents)
}
func (md *cacheMetadata) queueSize(s int64) error {
return md.queueValue(keySize, s, "")
}

277
cache/refs.go vendored
View File

@ -69,7 +69,7 @@ type cacheRecord struct {
mutable bool
refs map[ref]struct{}
parent *immutableRef
parentRefs
*cacheMetadata
// dead means record is marked as deleted
@ -83,7 +83,7 @@ type cacheRecord struct {
equalMutable *mutableRef
equalImmutable *immutableRef
parentChainCache []digest.Digest
layerDigestChainCache []digest.Digest
}
// hold ref lock before calling
@ -108,24 +108,66 @@ func (cr *cacheRecord) mref(triggerLastUsed bool, descHandlers DescHandlers) *mu
return ref
}
func (cr *cacheRecord) parentChain() []digest.Digest {
if cr.parentChainCache != nil {
return cr.parentChainCache
}
blob := cr.getBlob()
if blob == "" {
return nil
// parentRefs is a disjoint union type that holds either a single layerParent for this record, a list
// of parents if this is a merged record or all nil fields if this record has no parents. At most one
// field should be non-nil at a time.
type parentRefs struct {
layerParent *immutableRef
mergeParents []*immutableRef
}
var parent []digest.Digest
if cr.parent != nil {
parent = cr.parent.parentChain()
// caller must hold cacheManager.mu
func (p parentRefs) release(ctx context.Context) (rerr error) {
if p.layerParent != nil {
p.layerParent.mu.Lock()
defer p.layerParent.mu.Unlock()
rerr = p.layerParent.release(ctx)
} else if len(p.mergeParents) > 0 {
for i, parent := range p.mergeParents {
if parent == nil {
continue
}
pcc := make([]digest.Digest, len(parent)+1)
copy(pcc, parent)
pcc[len(parent)] = digest.Digest(blob)
cr.parentChainCache = pcc
return pcc
parent.mu.Lock()
if err := parent.release(ctx); err != nil {
rerr = multierror.Append(rerr, err).ErrorOrNil()
} else {
p.mergeParents[i] = nil
}
parent.mu.Unlock()
}
}
return rerr
}
func (p parentRefs) clone() parentRefs {
if p.layerParent != nil {
p.layerParent = p.layerParent.clone()
} else if len(p.mergeParents) > 0 {
newParents := make([]*immutableRef, len(p.mergeParents))
for i, p := range p.mergeParents {
newParents[i] = p.clone()
}
p.mergeParents = newParents
}
return p
}
type refKind int
const (
BaseLayer refKind = iota
Layer
Merge
)
func (cr *cacheRecord) kind() refKind {
if len(cr.mergeParents) > 0 {
return Merge
}
if cr.layerParent != nil {
return Layer
}
return BaseLayer
}
// hold ref lock before calling
@ -133,6 +175,48 @@ func (cr *cacheRecord) isDead() bool {
return cr.dead || (cr.equalImmutable != nil && cr.equalImmutable.dead) || (cr.equalMutable != nil && cr.equalMutable.dead)
}
var errSkipWalk = errors.New("skip")
// walkAncestors calls the provided func on cr and each of its ancestors, counting both layer
// and merge parents. It starts at cr and does a depth-first walk to parents. It will visit
// a record and its parents multiple times if encountered more than once. It will only skip
// visiting parents of a record if errSkipWalk is returned. If any other error is returned,
// the walk will stop and return the error to the caller.
func (cr *cacheRecord) walkAncestors(f func(*cacheRecord) error) error {
curs := []*cacheRecord{cr}
for len(curs) > 0 {
cur := curs[len(curs)-1]
curs = curs[:len(curs)-1]
if err := f(cur); err != nil {
if errors.Is(err, errSkipWalk) {
continue
}
return err
}
switch cur.kind() {
case Layer:
curs = append(curs, cur.layerParent.cacheRecord)
case Merge:
for _, p := range cur.mergeParents {
curs = append(curs, p.cacheRecord)
}
}
}
return nil
}
// walkUniqueAncestors calls walkAncestors but skips a record if it's already been visited.
func (cr *cacheRecord) walkUniqueAncestors(f func(*cacheRecord) error) error {
memo := make(map[*cacheRecord]struct{})
return cr.walkAncestors(func(cr *cacheRecord) error {
if _, ok := memo[cr]; ok {
return errSkipWalk
}
memo[cr] = struct{}{}
return f(cr)
})
}
func (cr *cacheRecord) isLazy(ctx context.Context) (bool, error) {
if !cr.getBlobOnly() {
return false, nil
@ -188,7 +272,7 @@ func (cr *cacheRecord) size(ctx context.Context) (int64, error) {
var usage snapshots.Usage
if !cr.getBlobOnly() {
var err error
usage, err = cr.cm.ManagerOpt.Snapshotter.Usage(ctx, driverID)
usage, err = cr.cm.Snapshotter.Usage(ctx, driverID)
if err != nil {
cr.mu.Lock()
isDead := cr.isDead()
@ -236,16 +320,6 @@ func (cr *cacheRecord) size(ctx context.Context) (int64, error) {
return s.(int64), nil
}
func (cr *cacheRecord) parentRef(hidden bool, descHandlers DescHandlers) *immutableRef {
p := cr.parent
if p == nil {
return nil
}
p.mu.Lock()
defer p.mu.Unlock()
return p.ref(hidden, descHandlers)
}
// caller must hold cr.mu
func (cr *cacheRecord) mount(ctx context.Context, s session.Group) (_ snapshot.Mountable, rerr error) {
if cr.mountCache != nil {
@ -304,14 +378,6 @@ func (cr *cacheRecord) mount(ctx context.Context, s session.Group) (_ snapshot.M
// call when holding the manager lock
func (cr *cacheRecord) remove(ctx context.Context, removeSnapshot bool) error {
delete(cr.cm.records, cr.ID())
if cr.parent != nil {
cr.parent.mu.Lock()
err := cr.parent.release(ctx)
cr.parent.mu.Unlock()
if err != nil {
return err
}
}
if removeSnapshot {
if err := cr.cm.LeaseManager.Delete(ctx, leases.Lease{
ID: cr.ID(),
@ -320,7 +386,10 @@ func (cr *cacheRecord) remove(ctx context.Context, removeSnapshot bool) error {
}
}
if err := cr.cm.MetadataStore.Clear(cr.ID()); err != nil {
return err
return errors.Wrapf(err, "failed to delete metadata of %s", cr.ID())
}
if err := cr.parentRefs.release(ctx); err != nil {
return errors.Wrapf(err, "failed to release parents of %s", cr.ID())
}
return nil
}
@ -331,6 +400,58 @@ type immutableRef struct {
descHandlers DescHandlers
}
// Order is from parent->child, sr will be at end of slice. Refs should not
// be released as they are used internally in the underlying cacheRecords.
func (sr *immutableRef) layerChain() []*immutableRef {
var count int
sr.layerWalk(func(*immutableRef) {
count++
})
layers := make([]*immutableRef, count)
var index int
sr.layerWalk(func(sr *immutableRef) {
layers[index] = sr
index++
})
return layers
}
// layerWalk visits each ref representing an actual layer in the chain for
// sr (including sr). The layers are visited from lowest->highest as ordered
// in the remote for the ref.
func (sr *immutableRef) layerWalk(f func(*immutableRef)) {
switch sr.kind() {
case Merge:
for _, parent := range sr.mergeParents {
parent.layerWalk(f)
}
case Layer:
sr.layerParent.layerWalk(f)
fallthrough
case BaseLayer:
f(sr)
}
}
// hold cacheRecord.mu lock before calling
func (cr *cacheRecord) layerDigestChain() []digest.Digest {
if cr.layerDigestChainCache != nil {
return cr.layerDigestChainCache
}
switch cr.kind() {
case Merge:
for _, parent := range cr.mergeParents {
cr.layerDigestChainCache = append(cr.layerDigestChainCache, parent.layerDigestChain()...)
}
case Layer:
cr.layerDigestChainCache = append(cr.layerDigestChainCache, cr.layerParent.layerDigestChain()...)
fallthrough
case BaseLayer:
cr.layerDigestChainCache = append(cr.layerDigestChainCache, cr.getBlob())
}
return cr.layerDigestChainCache
}
type RefList []ImmutableRef
func (l RefList) Release(ctx context.Context) (rerr error) {
@ -348,7 +469,7 @@ func (l RefList) Release(ctx context.Context) (rerr error) {
}
func (sr *immutableRef) LayerChain() RefList {
chain := sr.parentRefChain()
chain := sr.layerChain()
l := RefList(make([]ImmutableRef, len(chain)))
for i, p := range chain {
l[i] = p.Clone()
@ -370,13 +491,17 @@ func (sr *mutableRef) DescHandler(dgst digest.Digest) *DescHandler {
return sr.descHandlers[dgst]
}
func (sr *immutableRef) Clone() ImmutableRef {
func (sr *immutableRef) clone() *immutableRef {
sr.mu.Lock()
ref := sr.ref(false, sr.descHandlers)
sr.mu.Unlock()
return ref
}
func (sr *immutableRef) Clone() ImmutableRef {
return sr.clone()
}
func (sr *immutableRef) ociDesc(ctx context.Context, dhs DescHandlers) (ocispecs.Descriptor, error) {
dgst := sr.getBlob()
if dgst == "" {
@ -552,19 +677,6 @@ func getBlobDesc(ctx context.Context, cs content.Store, dgst digest.Digest) (oci
return desc, nil
}
// order is from parent->child, sr will be at end of slice
func (sr *immutableRef) parentRefChain() []*immutableRef {
var count int
for ref := sr; ref != nil; ref = ref.parent {
count++
}
refs := make([]*immutableRef, count)
for i, ref := count-1, sr; ref != nil; i, ref = i-1, ref.parent {
refs[i] = ref
}
return refs
}
func (sr *immutableRef) Mount(ctx context.Context, readonly bool, s session.Group) (_ snapshot.Mountable, rerr error) {
if sr.equalMutable != nil && !readonly {
if err := sr.Finalize(ctx); err != nil {
@ -604,7 +716,7 @@ func (sr *immutableRef) Mount(ctx context.Context, readonly bool, s session.Grou
}
func (sr *immutableRef) Extract(ctx context.Context, s session.Group) (rerr error) {
if !sr.getBlobOnly() {
if (sr.kind() == Layer || sr.kind() == BaseLayer) && !sr.getBlobOnly() {
return nil
}
@ -625,7 +737,7 @@ func (sr *immutableRef) Extract(ctx context.Context, s session.Group) (rerr erro
func (sr *immutableRef) withRemoteSnapshotLabelsStargzMode(ctx context.Context, s session.Group, f func()) error {
dhs := sr.descHandlers
for _, r := range sr.parentRefChain() {
for _, r := range sr.layerChain() {
r := r
info, err := r.cm.Snapshotter.Stat(ctx, r.getSnapshotID())
if err != nil && !errdefs.IsNotFound(err) {
@ -667,7 +779,7 @@ func (sr *immutableRef) withRemoteSnapshotLabelsStargzMode(ctx context.Context,
func (sr *immutableRef) prepareRemoteSnapshotsStargzMode(ctx context.Context, s session.Group) error {
_, err := sr.sizeG.Do(ctx, sr.ID()+"-prepare-remote-snapshot", func(ctx context.Context) (_ interface{}, rerr error) {
dhs := sr.descHandlers
for _, r := range sr.parentRefChain() {
for _, r := range sr.layerChain() {
r := r
snapshotID := r.getSnapshotID()
if _, err := r.cm.Snapshotter.Stat(ctx, snapshotID); err == nil {
@ -699,8 +811,8 @@ func (sr *immutableRef) prepareRemoteSnapshotsStargzMode(ctx context.Context, s
}
)
parentID := ""
if r.parent != nil {
parentID = r.parent.getSnapshotID()
if r.layerParent != nil {
parentID = r.layerParent.getSnapshotID()
}
if err := r.cm.Snapshotter.Prepare(ctx, key, parentID, opts...); err != nil {
if errdefs.IsAlreadyExists(err) {
@ -757,11 +869,40 @@ func (sr *immutableRef) unlazy(ctx context.Context, dhs DescHandlers, s session.
return nil, nil
}
switch sr.kind() {
case Merge:
return nil, sr.unlazyMerge(ctx, dhs, s)
case Layer, BaseLayer:
return nil, sr.unlazyLayer(ctx, dhs, s)
}
return nil, nil
})
return err
}
// should be called within sizeG.Do call for this ref's ID
func (sr *immutableRef) unlazyMerge(ctx context.Context, dhs DescHandlers, s session.Group) error {
eg, egctx := errgroup.WithContext(ctx)
for _, parent := range sr.mergeParents {
parent := parent
eg.Go(func() error {
return parent.unlazy(egctx, dhs, s)
})
}
if err := eg.Wait(); err != nil {
return err
}
var diffs []snapshot.Diff
sr.layerWalk(func(sr *immutableRef) {
diff := snapshot.Diff{Upper: sr.getSnapshotID()}
if sr.layerParent != nil {
diff.Lower = sr.layerParent.getSnapshotID()
}
diffs = append(diffs, diff)
})
return sr.cm.Snapshotter.Merge(ctx, sr.getSnapshotID(), diffs)
}
// should be called within sizeG.Do call for this ref's ID
func (sr *immutableRef) unlazyLayer(ctx context.Context, dhs DescHandlers, s session.Group) (rerr error) {
if !sr.getBlobOnly() {
@ -788,12 +929,12 @@ func (sr *immutableRef) unlazyLayer(ctx context.Context, dhs DescHandlers, s ses
eg, egctx := errgroup.WithContext(ctx)
parentID := ""
if sr.parent != nil {
if sr.layerParent != nil {
eg.Go(func() error {
if err := sr.parent.unlazy(egctx, dhs, s); err != nil {
if err := sr.layerParent.unlazy(egctx, dhs, s); err != nil {
return err
}
parentID = sr.parent.getSnapshotID()
parentID = sr.layerParent.getSnapshotID()
return nil
})
}
@ -925,7 +1066,7 @@ func (cr *cacheRecord) finalize(ctx context.Context) error {
return nil
}
_, err := cr.cm.ManagerOpt.LeaseManager.Create(ctx, func(l *leases.Lease) error {
_, err := cr.cm.LeaseManager.Create(ctx, func(l *leases.Lease) error {
l.ID = cr.ID()
l.Labels = map[string]string{
"containerd.io/gc.flat": time.Now().UTC().Format(time.RFC3339Nano),
@ -970,7 +1111,7 @@ func (sr *mutableRef) shouldUpdateLastUsed() bool {
return sr.triggerLastUsed
}
func (sr *mutableRef) commit(ctx context.Context) (*immutableRef, error) {
func (sr *mutableRef) commit(ctx context.Context) (_ *immutableRef, rerr error) {
if !sr.mutable || len(sr.refs) == 0 {
return nil, errors.Wrapf(errInvalid, "invalid mutable ref %p", sr)
}
@ -980,7 +1121,7 @@ func (sr *mutableRef) commit(ctx context.Context) (*immutableRef, error) {
rec := &cacheRecord{
mu: sr.mu,
cm: sr.cm,
parent: sr.parentRef(false, sr.descHandlers),
parentRefs: sr.parentRefs.clone(),
equalMutable: sr,
refs: make(map[ref]struct{}),
cacheMetadata: md,
@ -992,11 +1133,7 @@ func (sr *mutableRef) commit(ctx context.Context) (*immutableRef, error) {
}
}
parentID := ""
if rec.parent != nil {
parentID = rec.parent.ID()
}
if err := initializeMetadata(rec.cacheMetadata, parentID); err != nil {
if err := initializeMetadata(rec.cacheMetadata, rec.parentRefs); err != nil {
return nil, err
}
@ -1028,8 +1165,8 @@ func (sr *mutableRef) Mount(ctx context.Context, readonly bool, s session.Group)
}
var mnt snapshot.Mountable
if sr.cm.Snapshotter.Name() == "stargz" && sr.parent != nil {
if err := sr.parent.withRemoteSnapshotLabelsStargzMode(ctx, s, func() {
if sr.cm.Snapshotter.Name() == "stargz" && sr.layerParent != nil {
if err := sr.layerParent.withRemoteSnapshotLabelsStargzMode(ctx, s, func() {
mnt, rerr = sr.mount(ctx, s)
}); err != nil {
return nil, err

3
cache/remote.go vendored
View File

@ -145,7 +145,7 @@ func (sr *immutableRef) getRemote(ctx context.Context, createIfNeeded bool, comp
return nil, err
}
chain := sr.parentRefChain()
chain := sr.layerChain()
mproviderBase := contentutil.NewMultiProvider(nil)
mprovider := &lazyMultiProvider{mprovider: mproviderBase}
remote := &solver.Remote{
@ -156,7 +156,6 @@ func (sr *immutableRef) getRemote(ctx context.Context, createIfNeeded bool, comp
if err != nil {
return nil, err
}
// NOTE: The media type might be missing for some migrated ones
// from before lease based storage. If so, we should detect
// the media type from blob data.

393
client/client_test.go
View File

@ -137,6 +137,8 @@ func TestIntegration(t *testing.T) {
testLocalSourceDiffer,
testBuildExportZstd,
testPullZstdImage,
testMergeOp,
testMergeOpCache,
}, mirrors)
integration.Run(t, []integration.Test{
@ -3888,6 +3890,389 @@ func testProxyEnv(t *testing.T, sb integration.Sandbox) {
require.Equal(t, string(dt), "httpvalue-httpsvalue-noproxyvalue-noproxyvalue-allproxyvalue-allproxyvalue")
}
func testMergeOp(t *testing.T, sb integration.Sandbox) {
requiresLinux(t)
c, err := New(sb.Context(), sb.Address())
require.NoError(t, err)
defer c.Close()
requireContents := func(state llb.State, files ...fstest.Applier) {
def, err := state.Marshal(sb.Context())
require.NoError(t, err)
destDir, err := ioutil.TempDir("", "buildkit")
require.NoError(t, err)
defer os.RemoveAll(destDir)
_, err = c.Solve(sb.Context(), def, SolveOpt{
Exports: []ExportEntry{
{
Type: ExporterLocal,
OutputDir: destDir,
},
},
}, nil)
require.NoError(t, err)
require.NoError(t, fstest.CheckDirectoryEqualWithApplier(destDir, fstest.Apply(files...)))
}
stateA := llb.Scratch().
File(llb.Mkfile("/foo", 0777, []byte("A"))).
File(llb.Mkfile("/a", 0777, []byte("A"))).
File(llb.Mkdir("/bar", 0700)).
File(llb.Mkfile("/bar/A", 0777, []byte("A")))
stateB := stateA.
File(llb.Rm("/foo")).
File(llb.Mkfile("/b", 0777, []byte("B"))).
File(llb.Mkfile("/bar/B", 0774, []byte("B")))
stateC := llb.Scratch().
File(llb.Mkfile("/foo", 0775, []byte("C"))).
File(llb.Mkfile("/c", 0777, []byte("C"))).
File(llb.Mkdir("/bar", 0777)).
File(llb.Mkfile("/bar/A", 0400, []byte("C")))
mergeA := llb.Merge([]llb.State{stateA, stateC})
requireContents(mergeA,
fstest.CreateFile("foo", []byte("C"), 0775),
fstest.CreateFile("c", []byte("C"), 0777),
fstest.CreateDir("bar", 0777),
fstest.CreateFile("bar/A", []byte("C"), 0400),
fstest.CreateFile("a", []byte("A"), 0777),
)
mergeB := llb.Merge([]llb.State{stateC, stateB})
requireContents(mergeB,
fstest.CreateFile("a", []byte("A"), 0777),
fstest.CreateFile("b", []byte("B"), 0777),
fstest.CreateFile("c", []byte("C"), 0777),
fstest.CreateDir("bar", 0700),
fstest.CreateFile("bar/A", []byte("A"), 0777),
fstest.CreateFile("bar/B", []byte("B"), 0774),
)
stateD := llb.Scratch().File(llb.Mkdir("/qaz", 0755))
mergeC := llb.Merge([]llb.State{mergeA, mergeB, stateD})
requireContents(mergeC,
fstest.CreateFile("a", []byte("A"), 0777),
fstest.CreateFile("b", []byte("B"), 0777),
fstest.CreateFile("c", []byte("C"), 0777),
fstest.CreateDir("bar", 0700),
fstest.CreateFile("bar/A", []byte("A"), 0777),
fstest.CreateFile("bar/B", []byte("B"), 0774),
fstest.CreateDir("qaz", 0755),
)
runA := llb.Merge([]llb.State{llb.Image("busybox"), mergeC}).
Run(llb.Shlex("sh -c -e -x '" + strings.Join([]string{
// turn /a file into a dir, mv b and c into it
"rm /a",
"mkdir /a",
"mv /b /c /a/",
// remove+recreate /bar to make it opaque on overlay snapshotters
"rm -rf /bar",
"mkdir -m 0777 /bar",
"echo -n D > /bar/D",
// turn /qaz dir into a file
"rm -rf /qaz",
"touch /qaz",
}, " && ") + "'")).Root().
File(llb.Rm("/bin")). // get rid of stuff from busybox image that is tedious to assert on
File(llb.Rm("/dev")).
File(llb.Rm("/etc")).
File(llb.Rm("/home")).
File(llb.Rm("/root")).
File(llb.Rm("/tmp")).
File(llb.Rm("/usr")).
File(llb.Rm("/var")).
File(llb.Rm("/proc")).
File(llb.Rm("/sys"))
stateE := llb.Scratch().
File(llb.Mkfile("/foo", 0777, []byte("E"))).
File(llb.Mkdir("/bar", 0777)).
File(llb.Mkfile("/bar/A", 0777, []byte("A"))).
File(llb.Mkfile("/bar/E", 0777, nil))
mergeD := llb.Merge([]llb.State{stateE, runA})
requireContents(mergeD,
fstest.CreateDir("a", 0755),
fstest.CreateFile("a/b", []byte("B"), 0777),
fstest.CreateFile("a/c", []byte("C"), 0777),
fstest.CreateDir("bar", 0777),
fstest.CreateFile("bar/D", []byte("D"), 0644),
fstest.CreateFile("bar/E", nil, 0777), // exists because opaques dirs are converted to explicit whiteouts
fstest.CreateFile("qaz", nil, 0644),
// /foo from stateE is not here because it is deleted in stateB, which is part of a submerge of mergeD
)
}
func testMergeOpCache(t *testing.T, sb integration.Sandbox) {
skipDockerd(t, sb)
requiresLinux(t)
cdAddress := sb.ContainerdAddress()
if cdAddress == "" {
t.Skip("test requires containerd worker")
}
client, err := newContainerd(cdAddress)
require.NoError(t, err)
defer client.Close()
ctx := namespaces.WithNamespace(sb.Context(), "buildkit")
registry, err := sb.NewRegistry()
if errors.Is(err, integration.ErrorRequirements) {
t.Skip(err.Error())
}
require.NoError(t, err)
c, err := New(sb.Context(), sb.Address())
require.NoError(t, err)
defer c.Close()
// push the busybox image to the mutable registry
sourceImage := "busybox:latest"
def, err := llb.Image(sourceImage).Marshal(sb.Context())
require.NoError(t, err)
busyboxTargetNoTag := registry + "/buildkit/testlazyimage:"
busyboxTarget := busyboxTargetNoTag + "latest"
_, err = c.Solve(sb.Context(), def, SolveOpt{
Exports: []ExportEntry{
{
Type: ExporterImage,
Attrs: map[string]string{
"name": busyboxTarget,
"push": "true",
},
},
},
}, nil)
require.NoError(t, err)
imageService := client.ImageService()
contentStore := client.ContentStore()
busyboxImg, err := imageService.Get(ctx, busyboxTarget)
require.NoError(t, err)
busyboxManifest, err := images.Manifest(ctx, contentStore, busyboxImg.Target, nil)
require.NoError(t, err)
for _, layer := range busyboxManifest.Layers {
_, err = contentStore.Info(ctx, layer.Digest)
require.NoError(t, err)
}
// clear all local state out
err = imageService.Delete(ctx, busyboxImg.Name, images.SynchronousDelete())
require.NoError(t, err)
checkAllReleasable(t, c, sb, true)
for _, layer := range busyboxManifest.Layers {
_, err = contentStore.Info(ctx, layer.Digest)
require.ErrorIs(t, err, ctderrdefs.ErrNotFound, "unexpected error %v", err)
}
// make a new merge that includes the lazy busybox as a base and exports inline cache
input1 := llb.Scratch().
File(llb.Mkdir("/dir", 0777)).
File(llb.Mkfile("/dir/1", 0777, nil))
input1Copy := llb.Scratch().File(llb.Copy(input1, "/dir/1", "/foo/1", &llb.CopyInfo{CreateDestPath: true}))
// put random contents in the file to ensure it's not re-run later
input2 := llb.Image("alpine:latest").Run(llb.Args([]string{"sh", "-c", strings.Join([]string{
"mkdir /dir",
"cat /dev/urandom | head -c 100 | sha256sum > /dir/2",
}, " && ")})).Root()
input2Copy := llb.Scratch().File(llb.Copy(input2, "/dir/2", "/bar/2", &llb.CopyInfo{CreateDestPath: true}))
merge := llb.Merge([]llb.State{llb.Image(busyboxTarget), input1Copy, input2Copy})
def, err = merge.Marshal(sb.Context())
require.NoError(t, err)
target := registry + "/buildkit/testmerge:latest"
cacheTarget := registry + "/buildkit/testmergecache:latest"
_, err = c.Solve(sb.Context(), def, SolveOpt{
Exports: []ExportEntry{
{
Type: ExporterImage,
Attrs: map[string]string{
"name": target,
"push": "true",
},
},
},
CacheExports: []CacheOptionsEntry{{
Type: "registry",
Attrs: map[string]string{
"ref": cacheTarget,
},
}},
}, nil)
require.NoError(t, err)
// verify that the busybox image stayed lazy
for _, layer := range busyboxManifest.Layers {
_, err = contentStore.Info(ctx, layer.Digest)
require.ErrorIs(t, err, ctderrdefs.ErrNotFound, "unexpected error %v", err)
}
// get the random value at /bar/2
destDir, err := ioutil.TempDir("", "buildkit")
require.NoError(t, err)
defer os.RemoveAll(destDir)
_, err = c.Solve(sb.Context(), def, SolveOpt{
Exports: []ExportEntry{
{
Type: ExporterLocal,
OutputDir: destDir,
},
},
}, nil)
require.NoError(t, err)
bar2Contents, err := ioutil.ReadFile(filepath.Join(destDir, "bar", "2"))
require.NoError(t, err)
// clear all local state out
img, err := imageService.Get(ctx, target)
require.NoError(t, err)
manifest, err := images.Manifest(ctx, contentStore, img.Target, nil)
require.NoError(t, err)
err = imageService.Delete(ctx, img.Name, images.SynchronousDelete())
require.NoError(t, err)
checkAllReleasable(t, c, sb, true)
for _, layer := range manifest.Layers {
_, err = contentStore.Info(ctx, layer.Digest)
require.ErrorIs(t, err, ctderrdefs.ErrNotFound, "unexpected error %v", err)
}
// re-run the same build with cache imports and verify everything stays lazy
_, err = c.Solve(sb.Context(), def, SolveOpt{
Exports: []ExportEntry{{
Type: ExporterImage,
Attrs: map[string]string{
"name": target,
"push": "true",
},
}},
CacheImports: []CacheOptionsEntry{{
Type: "registry",
Attrs: map[string]string{
"ref": cacheTarget,
},
}},
CacheExports: []CacheOptionsEntry{{
Type: "registry",
Attrs: map[string]string{
"ref": cacheTarget,
},
}},
}, nil)
require.NoError(t, err)
// verify everything from before stayed lazy except the middle layer for input1Copy
img, err = imageService.Get(ctx, target)
require.NoError(t, err)
manifest, err = images.Manifest(ctx, contentStore, img.Target, nil)
require.NoError(t, err)
for i, layer := range manifest.Layers {
_, err = contentStore.Info(ctx, layer.Digest)
require.ErrorIs(t, err, ctderrdefs.ErrNotFound, "unexpected error %v for index %d", err, i)
}
// re-run the build with a change only to input1 using the remote cache
input1 = llb.Scratch().
File(llb.Mkdir("/dir", 0777)).
File(llb.Mkfile("/dir/1", 0444, nil))
input1Copy = llb.Scratch().File(llb.Copy(input1, "/dir/1", "/foo/1", &llb.CopyInfo{CreateDestPath: true}))
merge = llb.Merge([]llb.State{llb.Image(busyboxTarget), input1Copy, input2Copy})
def, err = merge.Marshal(sb.Context())
require.NoError(t, err)
_, err = c.Solve(sb.Context(), def, SolveOpt{
Exports: []ExportEntry{{
Type: ExporterImage,
Attrs: map[string]string{
"name": target,
"push": "true",
},
}},
CacheImports: []CacheOptionsEntry{{
Type: "registry",
Attrs: map[string]string{
"ref": cacheTarget,
},
}},
CacheExports: []CacheOptionsEntry{{
Type: "registry",
Attrs: map[string]string{
"ref": cacheTarget,
},
}},
}, nil)
require.NoError(t, err)
// verify everything from before stayed lazy except the middle layer for input1Copy
img, err = imageService.Get(ctx, target)
require.NoError(t, err)
manifest, err = images.Manifest(ctx, contentStore, img.Target, nil)
require.NoError(t, err)
for i, layer := range manifest.Layers {
switch i {
case 0, 2:
// bottom and top layer should stay lazy as they didn't change
_, err = contentStore.Info(ctx, layer.Digest)
require.ErrorIs(t, err, ctderrdefs.ErrNotFound, "unexpected error %v for index %d", err, i)
case 1:
// middle layer had to be rebuilt, should exist locally
_, err = contentStore.Info(ctx, layer.Digest)
require.NoError(t, err)
default:
require.Fail(t, "unexpected layer index %d", i)
}
}
// check the random value at /bar/2 didn't change
destDir, err = ioutil.TempDir("", "buildkit")
require.NoError(t, err)
defer os.RemoveAll(destDir)
_, err = c.Solve(sb.Context(), def, SolveOpt{
Exports: []ExportEntry{
{
Type: ExporterLocal,
OutputDir: destDir,
},
},
CacheImports: []CacheOptionsEntry{{
Type: "registry",
Attrs: map[string]string{
"ref": cacheTarget,
},
}},
}, nil)
require.NoError(t, err)
newBar2Contents, err := ioutil.ReadFile(filepath.Join(destDir, "bar", "2"))
require.NoError(t, err)
require.Equalf(t, bar2Contents, newBar2Contents, "bar/2 contents changed")
}
func requiresLinux(t *testing.T) {
if runtime.GOOS != "linux" {
t.Skipf("unsupported GOOS: %s", runtime.GOOS)
@ -3972,15 +4357,19 @@ loop0:
retries = 0
for {
count := 0
err = client.ContentStore().Walk(ctx, func(content.Info) error {
var infos []content.Info
err = client.ContentStore().Walk(ctx, func(info content.Info) error {
count++
infos = append(infos, info)
return nil
})
require.NoError(t, err)
if count == 0 {
break
}
require.True(t, 20 > retries)
if retries >= 20 {
require.FailNowf(t, "content still exists", "%+v", infos)
}
retries++
time.Sleep(500 * time.Millisecond)
}

4
client/diskusage.go
View File

@ -18,7 +18,7 @@ type UsageInfo struct {
CreatedAt time.Time
LastUsedAt *time.Time
UsageCount int
Parent string
Parents []string
Description string
RecordType UsageRecordType
Shared bool
@ -44,7 +44,7 @@ func (c *Client) DiskUsage(ctx context.Context, opts ...DiskUsageOption) ([]*Usa
Mutable: d.Mutable,
InUse: d.InUse,
Size: d.Size_,
Parent: d.Parent,
Parents: d.Parents,
CreatedAt: d.CreatedAt,
Description: d.Description,
UsageCount: int(d.UsageCount),

96
client/llb/merge.go Normal file
View File

@ -0,0 +1,96 @@
package llb
import (
"context"
"github.com/moby/buildkit/solver/pb"
digest "github.com/opencontainers/go-digest"
"github.com/pkg/errors"
)
type MergeOp struct {
MarshalCache
inputs []Output
output Output
constraints Constraints
}
func NewMerge(inputs []State, c Constraints) *MergeOp {
op := &MergeOp{constraints: c}
for _, input := range inputs {
op.inputs = append(op.inputs, input.Output())
}
op.output = &output{vertex: op}
return op
}
func (m *MergeOp) Validate(ctx context.Context, constraints *Constraints) error {
if len(m.inputs) < 2 {
return errors.Errorf("merge must have at least 2 inputs")
}
return nil
}
func (m *MergeOp) Marshal(ctx context.Context, constraints *Constraints) (digest.Digest, []byte, *pb.OpMetadata, []*SourceLocation, error) {
if m.Cached(constraints) {
return m.Load()
}
if err := m.Validate(ctx, constraints); err != nil {
return "", nil, nil, nil, err
}
pop, md := MarshalConstraints(constraints, &m.constraints)
pop.Platform = nil // merge op is not platform specific
op := &pb.MergeOp{}
for _, input := range m.inputs {
op.Inputs = append(op.Inputs, &pb.MergeInput{Input: pb.InputIndex(len(pop.Inputs))})
pbInput, err := input.ToInput(ctx, constraints)
if err != nil {
return "", nil, nil, nil, err
}
pop.Inputs = append(pop.Inputs, pbInput)
}
pop.Op = &pb.Op_Merge{Merge: op}
dt, err := pop.Marshal()
if err != nil {
return "", nil, nil, nil, err
}
m.Store(dt, md, m.constraints.SourceLocations, constraints)
return m.Load()
}
func (m *MergeOp) Output() Output {
return m.output
}
func (m *MergeOp) Inputs() []Output {
return m.inputs
}
func Merge(inputs []State, opts ...ConstraintsOpt) State {
// filter out any scratch inputs, which have no effect when merged
var filteredInputs []State
for _, input := range inputs {
if input.Output() != nil {
filteredInputs = append(filteredInputs, input)
}
}
if len(filteredInputs) == 0 {
// a merge of only scratch results in scratch
return Scratch()
}
if len(filteredInputs) == 1 {
// a merge of a single non-empty input results in that non-empty input
return filteredInputs[0]
}
var c Constraints
for _, o := range opts {
o.SetConstraintsOption(&c)
}
addCap(&c, pb.CapMergeOp)
return NewState(NewMerge(filteredInputs, c).Output())
}

33
client/llb/merge_test.go Normal file
View File

@ -0,0 +1,33 @@
package llb
import (
"testing"
"github.com/stretchr/testify/require"
)
func TestScratchMerge(t *testing.T) {
t.Parallel()
s := Merge(nil)
require.Nil(t, s.Output())
s = Merge([]State{})
require.Nil(t, s.Output())
s = Merge([]State{Scratch()})
require.Nil(t, s.Output())
s = Merge([]State{Scratch(), Scratch()})
require.Nil(t, s.Output())
input := Image("foo")
s = Merge([]State{input})
require.Equal(t, input.Output(), s.Output())
s = Merge([]State{Scratch(), input, Scratch()})
require.Equal(t, input.Output(), s.Output())
s = Merge([]State{Scratch(), input, Image("bar")})
require.NotEqual(t, input.Output(), s.Output())
}

2
client/prune.go
View File

@ -42,7 +42,7 @@ func (c *Client) Prune(ctx context.Context, ch chan UsageInfo, opts ...PruneOpti
Mutable: d.Mutable,
InUse: d.InUse,
Size: d.Size_,
Parent: d.Parent,
Parents: d.Parents,
CreatedAt: d.CreatedAt,
Description: d.Description,
UsageCount: int(d.UsageCount),

2
cmd/buildctl/debug/dumpllb.go
View File

@ -111,6 +111,8 @@ func attr(dgst digest.Digest, op pb.Op) (string, string) {
return strings.Join(op.Exec.Meta.Args, " "), "box"
case *pb.Op_Build:
return "build", "box3d"
case *pb.Op_Merge:
return "merge", "invtriangle"
case *pb.Op_File:
names := []string{}

5
cmd/buildctl/diskusage.go
View File

@ -4,6 +4,7 @@ import (
"fmt"
"io"
"os"
"strings"
"text/tabwriter"
"github.com/moby/buildkit/client"
@ -61,8 +62,8 @@ func printKV(w io.Writer, k string, v interface{}) {
func printVerbose(tw *tabwriter.Writer, du []*client.UsageInfo) {
for _, di := range du {
printKV(tw, "ID", di.ID)
if di.Parent != "" {
printKV(tw, "Parent", di.Parent)
if len(di.Parents) > 0 {
printKV(tw, "Parents", strings.Join(di.Parents, ";"))
}
printKV(tw, "Created at", di.CreatedAt)
printKV(tw, "Mutable", di.Mutable)

4
control/control.go
View File

@ -109,7 +109,7 @@ func (c *Controller) DiskUsage(ctx context.Context, r *controlapi.DiskUsageReque
Mutable: r.Mutable,
InUse: r.InUse,
Size_: r.Size,
Parent: r.Parent,
Parents: r.Parents,
UsageCount: int64(r.UsageCount),
Description: r.Description,
CreatedAt: r.CreatedAt,
@ -177,7 +177,7 @@ func (c *Controller) Prune(req *controlapi.PruneRequest, stream controlapi.Contr
Mutable: r.Mutable,
InUse: r.InUse,
Size_: r.Size,
Parent: r.Parent,
Parents: r.Parents,
UsageCount: int64(r.UsageCount),
Description: r.Description,
CreatedAt: r.CreatedAt,

2
go.mod
View File

@ -31,6 +31,7 @@ require (
github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
github.com/grpc-ecosystem/go-grpc-middleware v1.3.0
github.com/hashicorp/go-immutable-radix v1.3.1
github.com/hashicorp/go-multierror v1.1.1
github.com/hashicorp/golang-lru v0.5.3
github.com/ishidawataru/sctp v0.0.0-20210226210310-f2269e66cdee // indirect
github.com/klauspost/compress v1.13.5
@ -100,7 +101,6 @@ require (
github.com/grpc-ecosystem/grpc-gateway v1.16.0 // indirect
github.com/hanwen/go-fuse/v2 v2.1.0 // indirect
github.com/hashicorp/errwrap v1.0.0 // indirect
github.com/hashicorp/go-multierror v1.1.1 // indirect
github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect
github.com/moby/sys/mountinfo v0.5.0 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect

2
hack/test
View File

@ -61,7 +61,7 @@ if ! docker container inspect "$cacheVolume" >/dev/null 2>/dev/null; then
fi
if [ "$TEST_INTEGRATION" == 1 ]; then
cid=$(docker create --rm -v /tmp $coverageVol --volumes-from=$cacheVolume -e TEST_DOCKERD -e SKIP_INTEGRATION_TESTS -e BUILDKIT_REGISTRY_MIRROR_DIR=/root/.cache/registry --privileged $iid go test $coverageFlags ${TESTFLAGS:--v} ${TESTPKGS:-./...})
cid=$(docker create --rm -v /tmp $coverageVol --volumes-from=$cacheVolume -e TEST_DOCKERD -e SKIP_INTEGRATION_TESTS ${BUILDKIT_INTEGRATION_SNAPSHOTTER:+"-eBUILDKIT_INTEGRATION_SNAPSHOTTER"} -e BUILDKIT_REGISTRY_MIRROR_DIR=/root/.cache/registry --privileged $iid go test $coverageFlags ${TESTFLAGS:--v} ${TESTPKGS:-./...})
if [ "$TEST_DOCKERD" = "1" ]; then
docker cp "$TEST_DOCKERD_BINARY" $cid:/usr/bin/
fi

414
snapshot/diffapply_unix.go Normal file
View File

@ -0,0 +1,414 @@
//go:build !windows
// +build !windows
package snapshot
import (
"context"
gofs "io/fs"
"os"
"path/filepath"
"syscall"
"github.com/containerd/containerd/leases"
"github.com/containerd/containerd/mount"
"github.com/containerd/containerd/snapshots"
"github.com/containerd/continuity/fs"
"github.com/containerd/continuity/sysx"
"github.com/containerd/stargz-snapshotter/snapshot/overlayutils"
"github.com/moby/buildkit/identity"
"github.com/moby/buildkit/util/bklog"
"github.com/moby/buildkit/util/leaseutil"
"github.com/moby/buildkit/util/overlay"
"github.com/pkg/errors"
"golang.org/x/sys/unix"
)
// diffApply calculates the diff between two directories and directly applies the changes to a separate mount (without using
// the content store as an intermediary). If useHardlink is set to true, it will hardlink non-directories instead of copying
// them when applying. This obviously requires that each of the mounts provided are for immutable, committed snapshots.
// externalHardlinks tracks any such hardlinks, which is needed for doing correct disk usage calculations elsewhere.
func diffApply(ctx context.Context, lowerMountable, upperMountable, applyMountable Mountable, useHardlink bool, externalHardlinks map[uint64]struct{}, createWhiteoutDeletes bool) error {
if applyMountable == nil {
return errors.New("invalid nil apply mounts")
}
var lowerMounts []mount.Mount
if lowerMountable != nil {
mounts, unmountLower, err := lowerMountable.Mount()
if err != nil {
return err
}
lowerMounts = mounts
defer unmountLower()
}
var upperMounts []mount.Mount
if upperMountable != nil {
mounts, unmountUpper, err := upperMountable.Mount()
if err != nil {
return err
}
upperMounts = mounts
defer unmountUpper()
}
lowerMnter := LocalMounterWithMounts(lowerMounts)
lowerView, err := lowerMnter.Mount()
if err != nil {
return err
}
defer lowerMnter.Unmount()
upperMnter := LocalMounterWithMounts(upperMounts)
upperView, err := upperMnter.Mount()
if err != nil {
return err
}
defer upperMnter.Unmount()
applyMounts, unmountApply, err := applyMountable.Mount()
if err != nil {
return err
}
defer unmountApply()
var applyRoot string
if useHardlink {
applyRoot, err = getRWDir(applyMounts)
if err != nil {
return err
}
} else {
applyMnter := LocalMounterWithMounts(applyMounts)
applyRoot, err = applyMnter.Mount()
if err != nil {
return err
}
defer applyMnter.Unmount()
}
type pathTime struct {
applyPath string
atime unix.Timespec
mtime unix.Timespec
}
// times holds the paths+times we visited and need to set
var times []pathTime
visited := make(map[string]struct{})
inodes := make(map[uint64]string)
diffCalculator := func(cf fs.ChangeFunc) error {
return fs.Changes(ctx, lowerView, upperView, cf)
}
upperRoot := upperView
// If using hardlinks, set upperRoot to the underlying filesystem so hardlinks can avoid EXDEV
if useHardlink && len(upperMounts) == 1 {
switch upperMounts[0].Type {
case "bind", "rbind":
upperRoot = upperMounts[0].Source
case "overlay":
if upperdir, err := overlay.GetUpperdir(lowerMounts, upperMounts); err == nil {
upperRoot = upperdir
diffCalculator = func(cf fs.ChangeFunc) error {
return overlay.Changes(ctx, cf, upperRoot, upperView, lowerView)
}
} else {
useHardlink = false
}
}
}
var changeFunc fs.ChangeFunc
changeFunc = func(kind fs.ChangeKind, changePath string, upperFi os.FileInfo, prevErr error) error {
if prevErr != nil {
return prevErr
}
applyPath, err := safeJoin(applyRoot, changePath)
if err != nil {
return errors.Wrapf(err, "failed to get apply path for root %q, change %q", applyRoot, changePath)
}
upperPath, err := safeJoin(upperRoot, changePath)
if err != nil {
return errors.Wrapf(err, "failed to get upper path for root %q, change %q", upperPath, changePath)
}
visited[upperPath] = struct{}{}
if kind == fs.ChangeKindUnmodified {
return nil
}
// When using overlay, a delete is represented with a whiteout device, which we actually want to
// hardlink or recreate here. If upperFi is non-nil, that means we have a whiteout device we can
// hardlink in. If upperFi is nil though, we need to first remove what's at the path and then, in
// the overlay case, create a whiteout device to represent the delete. This can happen when the
// overlay differ encounters an opaque dir, in which case it switches to the walking differ in order
// to convert from the opaque representation to the "explicit whiteout" format.
if kind == fs.ChangeKindDelete && upperFi == nil {
if err := os.RemoveAll(applyPath); err != nil {
return errors.Wrapf(err, "failed to remove path %s during apply", applyPath)
}
// Create the whiteout device only if enabled and if we are directly applying to an upperdir (as
// opposed to applying to an overlay mount itself).
if createWhiteoutDeletes && upperRoot != upperView {
if err := unix.Mknod(applyPath, unix.S_IFCHR, int(unix.Mkdev(0, 0))); err != nil {
return errors.Wrap(err, "failed to create whiteout delete")
}
}
return nil
}
upperType := upperFi.Mode().Type()
if upperType == os.ModeIrregular {
return errors.Errorf("unhandled irregular mode file during merge at path %q", changePath)
}
upperStat, ok := upperFi.Sys().(*syscall.Stat_t)
if !ok {
return errors.Errorf("unhandled stat type for %+v", upperFi)
}
// Check to see if the parent dir needs to be created. This is needed when we are visiting a dirent
// that changes but never visit its parent dir because the parent did not change in the diff
changeParent := filepath.Dir(changePath)
if changeParent != "/" {
upperParent := filepath.Dir(upperPath)
if _, ok := visited[upperParent]; !ok {
parentInfo, err := os.Lstat(upperParent)
if err != nil {
return errors.Wrap(err, "failed to stat parent path during apply")
}
if err := changeFunc(fs.ChangeKindAdd, changeParent, parentInfo, nil); err != nil {
return err
}
}
}
applyFi, err := os.Lstat(applyPath)
if err != nil && !os.IsNotExist(err) {
return errors.Wrapf(err, "failed to stat path during apply")
}
// if there is an existing file/dir at the applyPath, delete it unless both it and upper are dirs (in which case they get merged)
if applyFi != nil && !(applyFi.IsDir() && upperFi.IsDir()) {
if err := os.RemoveAll(applyPath); err != nil {
return errors.Wrapf(err, "failed to remove path %s during apply", applyPath)
}
applyFi = nil
}
// hardlink fast-path
if useHardlink {
switch upperType {
case os.ModeDir, os.ModeNamedPipe, os.ModeSocket:
// Directories can't be hard-linked, so they just have to be recreated.
// Named pipes and sockets can be hard-linked but is best to avoid as it could enable IPC by sharing merge inputs.
break
default:
// TODO:(sipsma) consider handling EMLINK by falling back to copy
if err := os.Link(upperPath, applyPath); err != nil {
return errors.Wrapf(err, "failed to hardlink %q to %q during apply", upperPath, applyPath)
}
// mark this inode as one coming from a separate snapshot, needed for disk usage calculations elsewhere
externalHardlinks[upperStat.Ino] = struct{}{}
return nil
}
}
switch upperType {
case 0: // regular file
if upperStat.Nlink > 1 {
if linkedPath, ok := inodes[upperStat.Ino]; ok {
if err := os.Link(linkedPath, applyPath); err != nil {
return errors.Wrap(err, "failed to create hardlink during apply")
}
return nil // no other metadata updates needed when hardlinking
}
inodes[upperStat.Ino] = applyPath
}
if err := fs.CopyFile(applyPath, upperPath); err != nil {
return errors.Wrapf(err, "failed to copy from %s to %s during apply", upperPath, applyPath)
}
case os.ModeDir:
if applyFi == nil {
// applyPath doesn't exist, make it a dir
if err := os.Mkdir(applyPath, upperFi.Mode()); err != nil {
return errors.Wrap(err, "failed to create applied dir")
}
}
case os.ModeSymlink:
if target, err := os.Readlink(upperPath); err != nil {
return errors.Wrap(err, "failed to read symlink during apply")
} else if err := os.Symlink(target, applyPath); err != nil {
return errors.Wrap(err, "failed to create symlink during apply")
}
case os.ModeCharDevice, os.ModeDevice, os.ModeNamedPipe, os.ModeSocket:
if err := unix.Mknod(applyPath, uint32(upperFi.Mode()), int(upperStat.Rdev)); err != nil {
return errors.Wrap(err, "failed to create device during apply")
}
default:
// should never be here, all types should be handled
return errors.Errorf("unhandled file type %q during merge at path %q", upperType.String(), changePath)
}
xattrs, err := sysx.LListxattr(upperPath)
if err != nil {
return errors.Wrapf(err, "failed to list xattrs of upper path %s", upperPath)
}
for _, xattr := range xattrs {
if isOpaqueXattr(xattr) {
// Don't recreate opaque xattrs during merge. These should only be set when using overlay snapshotters,
// in which case we are converting from the "opaque whiteout" format to the "explicit whiteout" format during
// the merge (as taken care of by the overlay differ).
continue
}
xattrVal, err := sysx.LGetxattr(upperPath, xattr)
if err != nil {
return errors.Wrapf(err, "failed to get xattr %s of upper path %s", xattr, upperPath)
}
if err := sysx.LSetxattr(applyPath, xattr, xattrVal, 0); err != nil {
// This can often fail, so just log it: https://github.com/moby/buildkit/issues/1189
bklog.G(ctx).Debugf("failed to set xattr %s of path %s during apply", xattr, applyPath)
}
}
if err := os.Lchown(applyPath, int(upperStat.Uid), int(upperStat.Gid)); err != nil {
return errors.Wrap(err, "failed to chown applied dir")
}
if upperType != os.ModeSymlink {
if err := os.Chmod(applyPath, upperFi.Mode()); err != nil {
return errors.Wrap(err, "failed to chmod applied dir")
}
}
// save the times we should set on this path, to be applied at the end.
times = append(times, pathTime{
applyPath: applyPath,
atime: unix.Timespec{
Sec: upperStat.Atim.Sec,
Nsec: upperStat.Atim.Nsec,
},
mtime: unix.Timespec{
Sec: upperStat.Mtim.Sec,
Nsec: upperStat.Mtim.Nsec,
},
})
return nil
}
if err := diffCalculator(changeFunc); err != nil {
return err
}
// Set times now that everything has been modified.
for i := range times {
ts := times[len(times)-1-i]
if err := unix.UtimesNanoAt(unix.AT_FDCWD, ts.applyPath, []unix.Timespec{ts.atime, ts.mtime}, unix.AT_SYMLINK_NOFOLLOW); err != nil {
return errors.Wrapf(err, "failed to update times of path %q", ts.applyPath)
}
}
return nil
}
func safeJoin(root, path string) (string, error) {
dir, base := filepath.Split(path)
parent, err := fs.RootPath(root, dir)
if err != nil {
return "", err
}
return filepath.Join(parent, base), nil
}
// diskUsage calculates the disk space used by the provided mounts, similar to the normal containerd snapshotter disk usage
// calculations but with the extra ability to take into account hardlinks that were created between snapshots, ensuring that
// they don't get double counted.
func diskUsage(ctx context.Context, mountable Mountable, externalHardlinks map[uint64]struct{}) (snapshots.Usage, error) {
mounts, unmount, err := mountable.Mount()
if err != nil {
return snapshots.Usage{}, err
}
defer unmount()
inodes := make(map[uint64]struct{})
var usage snapshots.Usage
root, err := getRWDir(mounts)
if err != nil {
return snapshots.Usage{}, err
}
if err := filepath.WalkDir(root, func(path string, dirent gofs.DirEntry, err error) error {
if err != nil {
return err
}
info, err := dirent.Info()
if err != nil {
return err
}
stat := info.Sys().(*syscall.Stat_t)
if _, ok := inodes[stat.Ino]; ok {
return nil
}
inodes[stat.Ino] = struct{}{}
if _, ok := externalHardlinks[stat.Ino]; !ok {
usage.Inodes++
usage.Size += stat.Blocks * 512 // 512 is always block size, see "man 2 stat"
}
return nil
}); err != nil {
return snapshots.Usage{}, err
}
return usage, nil
}
func isOpaqueXattr(s string) bool {
for _, k := range []string{"trusted.overlay.opaque", "user.overlay.opaque"} {
if s == k {
return true
}
}
return false
}
// needsUserXAttr checks whether overlay mounts should be provided the userxattr option. We can't use
// NeedsUserXAttr from the overlayutils package directly because we don't always have direct knowledge
// of the root of the snapshotter state (such as when using a remote snapshotter). Instead, we create
// a temporary new snapshot and test using its root, which works because single layer snapshots will
// use bind-mounts even when created by an overlay based snapshotter.
func needsUserXAttr(ctx context.Context, sn Snapshotter, lm leases.Manager) (bool, error) {
key := identity.NewID()
ctx, done, err := leaseutil.WithLease(ctx, lm, leaseutil.MakeTemporary)
if err != nil {
return false, errors.Wrap(err, "failed to create lease for checking user xattr")
}
defer done(context.TODO())
err = sn.Prepare(ctx, key, "")
if err != nil {
return false, err
}
mntable, err := sn.Mounts(ctx, key)
if err != nil {
return false, err
}
mnts, unmount, err := mntable.Mount()
if err != nil {
return false, err
}
defer unmount()
var userxattr bool
if err := mount.WithTempMount(ctx, mnts, func(root string) error {
var err error
userxattr, err = overlayutils.NeedsUserXAttr(root)
return err
}); err != nil {
return false, err
}
return userxattr, nil
}

24
snapshot/diffapply_windows.go Normal file
View File

@ -0,0 +1,24 @@
//go:build windows
// +build windows
package snapshot
import (
"context"
"github.com/containerd/containerd/leases"
"github.com/containerd/containerd/snapshots"
"github.com/pkg/errors"
)
func diffApply(ctx context.Context, lowerMountable, upperMountable, applyMountable Mountable, useHardlink bool, externalHardlinks map[uint64]struct{}, createWhiteoutDeletes bool) error {
return errors.New("diff apply not supported on windows")
}
func diskUsage(ctx context.Context, mountable Mountable, externalHardlinks map[uint64]struct{}) (snapshots.Usage, error) {
return snapshots.Usage{}, errors.New("disk usage not supported on windows")
}
func needsUserXAttr(ctx context.Context, sn Snapshotter, lm leases.Manager) (bool, error) {
return false, errors.New("needs userxattr not supported on windows")
}

32
snapshot/localmounter.go
View File

@ -1,9 +1,11 @@
package snapshot
import (
"strings"
"sync"
"github.com/containerd/containerd/mount"
"github.com/pkg/errors"
)
type Mounter interface {
@ -30,3 +32,33 @@ type localMounter struct {
target string
release func() error
}
// RWDirMount extracts out just a writable directory from the provided mounts and returns it.
// It's intended to supply the directory to which changes being made to the mount can be
// written directly. A writable directory includes an upperdir if provided an overlay or a rw
// bind mount source. If the mount doesn't have a writable directory, an error is returned.
func getRWDir(mounts []mount.Mount) (string, error) {
if len(mounts) != 1 {
return "", errors.New("cannot extract writable directory from zero or multiple mounts")
}
mnt := mounts[0]
switch mnt.Type {
case "overlay":
for _, opt := range mnt.Options {
if strings.HasPrefix(opt, "upperdir=") {
upperdir := strings.SplitN(opt, "=", 2)[1]
return upperdir, nil
}
}
return "", errors.New("cannot extract writable directory from overlay mount without upperdir")
case "bind", "rbind":
for _, opt := range mnt.Options {
if opt == "ro" {
return "", errors.New("cannot extract writable directory from read-only bind mount")
}
}
return mnt.Source, nil
default:
return "", errors.Errorf("cannot extract writable directory from unhandled mount type %q", mnt.Type)
}
}

2
snapshot/localmounter_unix.go
View File

@ -16,7 +16,7 @@ func (lm *localMounter) Mount() (string, error) {
lm.mu.Lock()
defer lm.mu.Unlock()
if lm.mounts == nil {
if lm.mounts == nil && lm.mountable != nil {
mounts, release, err := lm.mountable.Mount()
if err != nil {
return "", err

219
snapshot/merge.go Normal file
View File

@ -0,0 +1,219 @@
package snapshot
import (
"context"
"strconv"
"github.com/containerd/containerd/leases"
"github.com/containerd/containerd/pkg/userns"
"github.com/containerd/containerd/snapshots"
"github.com/moby/buildkit/identity"
"github.com/moby/buildkit/util/bklog"
"github.com/moby/buildkit/util/leaseutil"
"github.com/pkg/errors"
)
// hardlinkMergeSnapshotters are the names of snapshotters that support merges implemented by
// creating "hardlink farms" where non-directory objects are hard-linked into the merged tree
// from their parent snapshots.
var hardlinkMergeSnapshotters = map[string]struct{}{
"native": {},
"overlayfs": {},
"stargz": {},
}
// overlayBasedSnapshotters are the names of snapshotter that use overlay mounts, which
// enables optimizations such as skipping the base layer when doing a hardlink merge.
var overlayBasedSnapshotters = map[string]struct{}{
"overlayfs": {},
"stargz": {},
}
type Diff struct {
Lower string
Upper string
}
type MergeSnapshotter interface {
Snapshotter
// Merge creates a snapshot whose contents are the provided diffs applied onto one
// another in the provided order, starting from scratch. The diffs are calculated
// the same way that diffs are calculated during exports, which ensures that the
// result of merging these diffs looks the same as exporting the diffs as layer
// blobs and unpacking them as an image.
//
// Each key in the provided diffs is expected to be a committed snapshot. The
// snapshot created by Merge is also committed.
//
// The size of a merged snapshot (as returned by the Usage method) depends on the merge
// implementation. Implementations using hardlinks to create merged views will take up
// less space than those that use copies, for example.
Merge(ctx context.Context, key string, diffs []Diff, opts ...snapshots.Opt) error
}
type mergeSnapshotter struct {
Snapshotter
lm leases.Manager
// Whether we should try to implement merges by hardlinking between underlying directories
useHardlinks bool
// Whether the snapshotter is overlay-based, which enables some required behavior like
// creation of whiteout devices to represent deletes in addition to some optimizations
// like using the first merge input as the parent snapshot.
overlayBased bool
}
func NewMergeSnapshotter(ctx context.Context, sn Snapshotter, lm leases.Manager) MergeSnapshotter {
name := sn.Name()
_, useHardlinks := hardlinkMergeSnapshotters[name]
_, overlayBased := overlayBasedSnapshotters[name]
if overlayBased && userns.RunningInUserNS() {
// When using an overlay-based snapshotter, if we are running rootless on a pre-5.11
// kernel, we will not have userxattr. This results in opaque xattrs not being visible
// to us and thus breaking the overlay-optimized differ. This also means that there are
// cases where in order to apply a deletion, we'd need to create a whiteout device but
// may not have access to one to hardlink, so we just fall back to not using hardlinks
// at all in this case.
userxattr, err := needsUserXAttr(ctx, sn, lm)
if err != nil {
bklog.G(ctx).Debugf("failed to check user xattr: %v", err)
useHardlinks = false
} else {
useHardlinks = userxattr
}
}
return &mergeSnapshotter{
Snapshotter: sn,
lm: lm,
useHardlinks: useHardlinks,
overlayBased: overlayBased,
}
}
func (sn *mergeSnapshotter) Merge(ctx context.Context, key string, diffs []Diff, opts ...snapshots.Opt) error {
var baseKey string
if sn.overlayBased {
// Overlay-based snapshotters can skip the base snapshot of the merge (if one exists) and just use it as the
// parent of the merge snapshot. Other snapshotters will start empty (with baseKey set to "").
// Find the baseKey by following the chain of diffs for as long as it follows the pattern of the current lower
// being the parent of the current upper and equal to the previous upper.
var baseIndex int
for i, diff := range diffs {
info, err := sn.Stat(ctx, diff.Upper)
if err != nil {
return err
}
if info.Parent != diff.Lower {
break
}
if diff.Lower != baseKey {
break
}
baseKey = diff.Upper
baseIndex = i + 1
}
diffs = diffs[baseIndex:]
}
tempLeaseCtx, done, err := leaseutil.WithLease(ctx, sn.lm, leaseutil.MakeTemporary)
if err != nil {
return errors.Wrap(err, "failed to create temporary lease for view mounts during merge")
}
defer done(context.TODO())
// Make the snapshot that will be merged into
prepareKey := identity.NewID()
if err := sn.Prepare(tempLeaseCtx, prepareKey, baseKey); err != nil {
return errors.Wrapf(err, "failed to prepare %q", key)
}
applyMounts, err := sn.Mounts(ctx, prepareKey)
if err != nil {
return errors.Wrapf(err, "failed to get mounts of %q", key)
}
// externalHardlinks keeps track of which inodes have been hard-linked between snapshots (which is
// enabled when sn.useHardlinks is set to true)
externalHardlinks := make(map[uint64]struct{})
for _, diff := range diffs {
var lowerMounts Mountable
if diff.Lower != "" {
viewID := identity.NewID()
var err error
lowerMounts, err = sn.View(tempLeaseCtx, viewID, diff.Lower)
if err != nil {
return errors.Wrapf(err, "failed to get mounts of lower %q", diff.Lower)
}
}
viewID := identity.NewID()
upperMounts, err := sn.View(tempLeaseCtx, viewID, diff.Upper)
if err != nil {
return errors.Wrapf(err, "failed to get mounts of upper %q", diff.Upper)
}
err = diffApply(tempLeaseCtx, lowerMounts, upperMounts, applyMounts, sn.useHardlinks, externalHardlinks, sn.overlayBased)
if err != nil {
return err
}
}
// save the correctly calculated usage as a label on the committed key
usage, err := diskUsage(ctx, applyMounts, externalHardlinks)
if err != nil {
return errors.Wrap(err, "failed to get disk usage of diff apply merge")
}
if err := sn.Commit(ctx, key, prepareKey, withMergeUsage(usage)); err != nil {
return errors.Wrapf(err, "failed to commit %q", key)
}
return nil
}
func (sn *mergeSnapshotter) Usage(ctx context.Context, key string) (snapshots.Usage, error) {
// If key was created by Merge, we may need to use the annotated mergeUsage key as
// the snapshotter's usage method is wrong when hardlinks are used to create the merge.
if info, err := sn.Stat(ctx, key); err != nil {
return snapshots.Usage{}, err
} else if usage, ok, err := mergeUsageOf(info); err != nil {
return snapshots.Usage{}, err
} else if ok {
return usage, nil
}
return sn.Snapshotter.Usage(ctx, key)
}
// mergeUsage{Size,Inodes}Label hold the correct usage calculations for diffApplyMerges, for which the builtin usage
// is wrong because it can't account for hardlinks made across immutable snapshots
const mergeUsageSizeLabel = "buildkit.mergeUsageSize"
const mergeUsageInodesLabel = "buildkit.mergeUsageInodes"
func withMergeUsage(usage snapshots.Usage) snapshots.Opt {
return snapshots.WithLabels(map[string]string{
mergeUsageSizeLabel: strconv.Itoa(int(usage.Size)),
mergeUsageInodesLabel: strconv.Itoa(int(usage.Inodes)),
})
}
func mergeUsageOf(info snapshots.Info) (usage snapshots.Usage, ok bool, rerr error) {
if info.Labels == nil {
return snapshots.Usage{}, false, nil
}
if str, ok := info.Labels[mergeUsageSizeLabel]; ok {
i, err := strconv.Atoi(str)
if err != nil {
return snapshots.Usage{}, false, err
}
usage.Size = int64(i)
}
if str, ok := info.Labels[mergeUsageInodesLabel]; ok {
i, err := strconv.Atoi(str)
if err != nil {
return snapshots.Usage{}, false, err
}
usage.Inodes = int64(i)
}
return usage, true, nil
}

11
snapshot/snapshotter.go
View File

@ -7,6 +7,7 @@ import (
"github.com/containerd/containerd/mount"
"github.com/containerd/containerd/snapshots"
"github.com/docker/docker/pkg/idtools"
"github.com/pkg/errors"
)
type Mountable interface {
@ -53,6 +54,7 @@ func (s *fromContainerd) Mounts(ctx context.Context, key string) (Mountable, err
}
return &staticMountable{mounts: mounts, idmap: s.idmap, id: key}, nil
}
func (s *fromContainerd) Prepare(ctx context.Context, key, parent string, opts ...snapshots.Opt) error {
_, err := s.Snapshotter.Prepare(ctx, key, parent, opts...)
return err
@ -68,6 +70,15 @@ func (s *fromContainerd) IdentityMapping() *idtools.IdentityMapping {
return s.idmap
}
func (s *fromContainerd) Commit(ctx context.Context, name, key string, opts ...snapshots.Opt) error {
info, err := s.Stat(ctx, key)
if err != nil {
return errors.Wrap(err, "failed to stat active key during commit")
}
opts = append(opts, snapshots.WithLabels(snapshots.FilterInheritedLabels(info.Labels)))
return s.Snapshotter.Commit(ctx, name, key, opts...)
}
// NewContainerdSnapshotter converts snapshotter to containerd snapshotter
func NewContainerdSnapshotter(s Snapshotter) (snapshots.Snapshotter, func() error) {
cs := &containerdSnapshotter{Snapshotter: s}

629
snapshot/snapshotter_test.go Normal file
View File

@ -0,0 +1,629 @@
//go:build linux
// +build linux
package snapshot
import (
"context"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"syscall"
"testing"
"time"
"github.com/containerd/containerd/content/local"
"github.com/containerd/containerd/leases"
ctdmetadata "github.com/containerd/containerd/metadata"
"github.com/containerd/containerd/mount"
"github.com/containerd/containerd/namespaces"
"github.com/containerd/containerd/snapshots"
"github.com/containerd/containerd/snapshots/native"
"github.com/containerd/containerd/snapshots/overlay"
"github.com/containerd/continuity/fs/fstest"
"github.com/hashicorp/go-multierror"
"github.com/moby/buildkit/identity"
"github.com/moby/buildkit/util/leaseutil"
"github.com/stretchr/testify/require"
bolt "go.etcd.io/bbolt"
)
func newSnapshotter(ctx context.Context, snapshotterName string) (_ context.Context, _ *mergeSnapshotter, _ func() error, rerr error) {
ns := "buildkit-test"
ctx = namespaces.WithNamespace(ctx, ns)
defers := make([]func() error, 0)
cleanup := func() error {
var err error
for i := range defers {
err = multierror.Append(err, defers[len(defers)-1-i]()).ErrorOrNil()
}
return err
}
defer func() {
if rerr != nil && cleanup != nil {
cleanup()
}
}()
tmpdir, err := ioutil.TempDir("", "buildkit-test")
if err != nil {
return nil, nil, nil, err
}
defers = append(defers, func() error {
return os.RemoveAll(tmpdir)
})
var ctdSnapshotter snapshots.Snapshotter
var noHardlink bool
switch snapshotterName {
case "native-nohardlink":
noHardlink = true
fallthrough
case "native":
ctdSnapshotter, err = native.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
if err != nil {
return nil, nil, nil, err
}
case "overlayfs":
ctdSnapshotter, err = overlay.NewSnapshotter(filepath.Join(tmpdir, "snapshots"))
if err != nil {
return nil, nil, nil, err
}
default:
return nil, nil, nil, fmt.Errorf("unhandled snapshotter: %s", snapshotterName)
}
store, err := local.NewStore(tmpdir)
if err != nil {
return nil, nil, nil, err
}
db, err := bolt.Open(filepath.Join(tmpdir, "containerdmeta.db"), 0644, nil)
if err != nil {
return nil, nil, nil, err
}
defers = append(defers, func() error {
return db.Close()
})
mdb := ctdmetadata.NewDB(db, store, map[string]snapshots.Snapshotter{
snapshotterName: ctdSnapshotter,
})
if err := mdb.Init(context.TODO()); err != nil {
return nil, nil, nil, err
}
lm := leaseutil.WithNamespace(ctdmetadata.NewLeaseManager(mdb), ns)
snapshotter := NewMergeSnapshotter(ctx, FromContainerdSnapshotter(snapshotterName, mdb.Snapshotter(snapshotterName), nil), lm).(*mergeSnapshotter)
if noHardlink {
snapshotter.useHardlinks = false
}
leaseID := identity.NewID()
_, err = lm.Create(ctx, func(l *leases.Lease) error {
l.ID = leaseID
l.Labels = map[string]string{
"containerd.io/gc.flat": time.Now().UTC().Format(time.RFC3339Nano),
}
return nil
}, leaseutil.MakeTemporary)
if err != nil {
return nil, nil, nil, err
}
ctx = leases.WithLease(ctx, leaseID)
return ctx, snapshotter, cleanup, nil
}
func TestMerge(t *testing.T) {
for _, snName := range []string{"overlayfs", "native", "native-nohardlink"} {
snName := snName
t.Run(snName, func(t *testing.T) {
t.Parallel()
if snName == "overlayfs" {
requireRoot(t)
}
ctx, sn, cleanup, err := newSnapshotter(context.Background(), snName)
require.NoError(t, err)
defer cleanup()
ts := time.Unix(0, 0)
snapA := committedKey(ctx, t, sn, identity.NewID(), "",
fstest.CreateFile("foo", []byte("A"), 0777),
fstest.Lchtimes("foo", ts, ts.Add(2*time.Second)),
fstest.CreateFile("a", []byte("A"), 0777),
fstest.Lchtimes("a", ts, ts.Add(4*time.Second)),
fstest.CreateDir("bar", 0700),
fstest.CreateFile("bar/A", []byte("A"), 0777),
fstest.Lchtimes("bar/A", ts, ts.Add(6*time.Second)),
fstest.Lchtimes("bar", ts, ts.Add(6*time.Second)),
)
snapB := committedKey(ctx, t, sn, identity.NewID(), snapA.Name,
fstest.Remove("/foo"),
fstest.CreateFile("b", []byte("B"), 0777),
fstest.Lchtimes("b", ts, ts.Add(4*time.Second)),
fstest.CreateFile("bar/B", []byte("B"), 0774),
fstest.Lchtimes("bar/B", ts, ts.Add(9*time.Second)),
fstest.Lchtimes("bar", ts, ts.Add(9*time.Second)),
)
snapC := committedKey(ctx, t, sn, identity.NewID(), "",
fstest.CreateFile("foo", []byte("C"), 0775),
fstest.Lchtimes("foo", ts, ts.Add(4*time.Second)),
fstest.CreateFile("c", []byte("C"), 0777),
fstest.Lchtimes("c", ts, ts.Add(6*time.Second)),
fstest.CreateDir("bar", 0777),
fstest.CreateFile("bar/A", []byte("C"), 0400),
fstest.Lchtimes("bar/A", ts, ts.Add(12*time.Second)),
fstest.Lchtimes("bar", ts, ts.Add(12*time.Second)),
fstest.Symlink("foo", "symlink"),
fstest.Lchtimes("symlink", ts, ts.Add(3*time.Second)),
fstest.Link("bar/A", "hardlink"),
fstest.Symlink("../..", "dontfollowme"),
fstest.Lchtimes("dontfollowme", ts, ts.Add(2*time.Second)),
)
mergeA := mergeKey(ctx, t, sn, identity.NewID(), []Diff{
{"", snapA.Name}, {snapA.Name, snapB.Name},
{"", snapC.Name},
})
requireContents(ctx, t, sn, mergeA.Name,
fstest.CreateFile("a", []byte("A"), 0777),
fstest.CreateFile("b", []byte("B"), 0777),
fstest.CreateFile("c", []byte("C"), 0777),
fstest.CreateFile("foo", []byte("C"), 0775),
fstest.CreateDir("bar", 0777),
fstest.CreateFile("bar/A", []byte("C"), 0400),
fstest.CreateFile("bar/B", []byte("B"), 0774),
fstest.Symlink("foo", "symlink"),
fstest.Link("bar/A", "hardlink"),
fstest.Symlink("../..", "dontfollowme"),
)
withMount(ctx, t, sn, mergeA.Name, func(root string) {
requireMtime(t, filepath.Join(root, "a"), ts.Add(4*time.Second))
requireMtime(t, filepath.Join(root, "b"), ts.Add(4*time.Second))
requireMtime(t, filepath.Join(root, "c"), ts.Add(6*time.Second))
requireMtime(t, filepath.Join(root, "foo"), ts.Add(4*time.Second))
requireMtime(t, filepath.Join(root, "bar"), ts.Add(12*time.Second))
requireMtime(t, filepath.Join(root, "bar/A"), ts.Add(12*time.Second))
requireMtime(t, filepath.Join(root, "bar/B"), ts.Add(9*time.Second))
requireMtime(t, filepath.Join(root, "symlink"), ts.Add(3*time.Second))
requireMtime(t, filepath.Join(root, "dontfollowme"), ts.Add(2*time.Second))
})
mergeB := mergeKey(ctx, t, sn, identity.NewID(), []Diff{
{"", snapC.Name},
{"", snapA.Name}, {snapA.Name, snapB.Name},
})
requireContents(ctx, t, sn, mergeB.Name,
fstest.CreateFile("a", []byte("A"), 0777),
fstest.CreateFile("b", []byte("B"), 0777),
fstest.CreateFile("c", []byte("C"), 0777),
fstest.CreateDir("bar", 0700),
fstest.CreateFile("bar/A", []byte("A"), 0777),
fstest.CreateFile("bar/B", []byte("B"), 0774),
fstest.Symlink("foo", "symlink"),
fstest.CreateFile("hardlink", []byte("C"), 0400), // bar/A was overwritten, not considered hardlink
fstest.Symlink("../..", "dontfollowme"),
)
withMount(ctx, t, sn, mergeB.Name, func(root string) {
requireMtime(t, filepath.Join(root, "a"), ts.Add(4*time.Second))
requireMtime(t, filepath.Join(root, "b"), ts.Add(4*time.Second))
requireMtime(t, filepath.Join(root, "c"), ts.Add(6*time.Second))
requireMtime(t, filepath.Join(root, "bar"), ts.Add(9*time.Second))
requireMtime(t, filepath.Join(root, "bar/A"), ts.Add(6*time.Second))
requireMtime(t, filepath.Join(root, "bar/B"), ts.Add(9*time.Second))
requireMtime(t, filepath.Join(root, "symlink"), ts.Add(3*time.Second))
requireMtime(t, filepath.Join(root, "dontfollowme"), ts.Add(2*time.Second))
})
snapD := committedKey(ctx, t, sn, identity.NewID(), "",
fstest.CreateDir("bar", 0750),
fstest.CreateFile("bar/D", []byte("D"), 0444),
fstest.CreateDir("fs", 0770),
fstest.CreateFile("x", []byte("X"), 0400),
fstest.Link("x", "hardlink"),
fstest.Symlink("fs", "symlink"),
fstest.Link("symlink", "hardsymlink"),
)
mergeC := mergeKey(ctx, t, sn, identity.NewID(), []Diff{
// mergeA
{"", snapA.Name}, {snapA.Name, snapB.Name},
{"", snapC.Name},
// mergeB
{"", snapC.Name},
{"", snapA.Name}, {snapA.Name, snapB.Name},
// snapD
{"", snapD.Name},
})
requireContents(ctx, t, sn, mergeC.Name,
fstest.CreateFile("a", []byte("A"), 0777),
fstest.CreateFile("b", []byte("B"), 0777),
fstest.CreateFile("c", []byte("C"), 0777),
fstest.CreateDir("bar", 0750),
fstest.CreateFile("bar/A", []byte("A"), 0777),
fstest.CreateFile("bar/B", []byte("B"), 0774),
fstest.CreateFile("bar/D", []byte("D"), 0444),
fstest.CreateDir("fs", 0770),
fstest.CreateFile("x", []byte("X"), 0400),
fstest.Link("x", "hardlink"),
fstest.Symlink("fs", "symlink"),
fstest.Link("symlink", "hardsymlink"),
fstest.Symlink("../..", "dontfollowme"),
)
snapE := committedKey(ctx, t, sn, identity.NewID(), "",
fstest.CreateFile("qaz", nil, 0444),
fstest.CreateDir("bar", 0777),
fstest.CreateFile("bar/B", []byte("B"), 0444),
)
snapF := committedKey(ctx, t, sn, identity.NewID(), mergeC.Name,
fstest.Remove("a"),
fstest.CreateDir("a", 0770),
fstest.Rename("b", "a/b"),
fstest.Rename("c", "a/c"),
fstest.RemoveAll("bar"),
fstest.CreateDir("bar", 0777),
fstest.CreateFile("bar/D", []byte("D2"), 0444),
fstest.RemoveAll("fs"),
fstest.CreateFile("fs", nil, 0764),
fstest.Remove("x"),
fstest.CreateDir("x", 0555),
fstest.Remove("hardsymlink"),
fstest.CreateDir("hardsymlink", 0707),
)
mergeD := mergeKey(ctx, t, sn, identity.NewID(), []Diff{
{"", snapE.Name},
// mergeC
{"", snapA.Name}, {snapA.Name, snapB.Name},
{"", snapC.Name},
{"", snapC.Name},
{"", snapA.Name}, {snapA.Name, snapB.Name},
{"", snapD.Name},
// snapF
{mergeC.Name, snapF.Name},
})
requireContents(ctx, t, sn, mergeD.Name,
fstest.CreateDir("a", 0770),
fstest.CreateFile("a/b", []byte("B"), 0777),
fstest.CreateDir("bar", 0777),
fstest.CreateFile("a/c", []byte("C"), 0777),
fstest.CreateFile("bar/D", []byte("D2"), 0444),
fstest.CreateFile("fs", nil, 0764),
fstest.CreateDir("x", 0555),
fstest.CreateFile("hardlink", []byte("X"), 0400),
fstest.Symlink("fs", "symlink"),
fstest.CreateDir("hardsymlink", 0707),
fstest.Symlink("../..", "dontfollowme"),
fstest.CreateFile("qaz", nil, 0444),
)
})
}
}
func TestHardlinks(t *testing.T) {
for _, snName := range []string{"overlayfs", "native"} {
snName := snName
t.Run(snName, func(t *testing.T) {
t.Parallel()
if snName == "overlayfs" {
requireRoot(t)
}
ctx, sn, cleanup, err := newSnapshotter(context.Background(), snName)
require.NoError(t, err)
defer cleanup()
base1Snap := committedKey(ctx, t, sn, identity.NewID(), "",
fstest.CreateFile("1", []byte("1"), 0600),
)
base2Snap := committedKey(ctx, t, sn, identity.NewID(), "",
fstest.CreateFile("2", []byte("2"), 0600),
)
mergeSnap := mergeKey(ctx, t, sn, identity.NewID(), []Diff{
{"", base1Snap.Name},
{"", base2Snap.Name},
})
stat1 := statPath(ctx, t, sn, mergeSnap.Name, "1")
var expected1Links int
switch snName {
case "overlayfs":
// base merge input is used as parent, not merged with hardlinks
expected1Links = 1
case "native":
expected1Links = 2
}
require.EqualValues(t, expected1Links, stat1.Nlink)
stat1Ino := stat1.Ino
stat2 := statPath(ctx, t, sn, mergeSnap.Name, "2")
require.EqualValues(t, 2, stat2.Nlink)
stat2Ino := stat2.Ino
childSnap := committedKey(ctx, t, sn, identity.NewID(), mergeSnap.Name,
fstest.CreateFile("1", []byte("11"), 0644),
fstest.CreateFile("2", []byte("22"), 0644),
)
stat1 = statPath(ctx, t, sn, childSnap.Name, "1")
require.EqualValues(t, 1, stat1.Nlink)
require.NotEqualValues(t, stat1Ino, stat1.Ino)
stat2 = statPath(ctx, t, sn, childSnap.Name, "2")
require.EqualValues(t, 1, stat2.Nlink)
require.NotEqualValues(t, stat2Ino, stat2.Ino)
// verify the original files and the files inthe merge are unchanged
requireContents(ctx, t, sn, base1Snap.Name,
fstest.CreateFile("1", []byte("1"), 0600),
)
requireContents(ctx, t, sn, base2Snap.Name,
fstest.CreateFile("2", []byte("2"), 0600),
)
requireContents(ctx, t, sn, mergeSnap.Name,
fstest.CreateFile("1", []byte("1"), 0600),
fstest.CreateFile("2", []byte("2"), 0600),
)
})
}
}
func TestUsage(t *testing.T) {
for _, snName := range []string{"overlayfs", "native", "native-nohardlink"} {
snName := snName
t.Run(snName, func(t *testing.T) {
t.Parallel()
if snName == "overlayfs" {
requireRoot(t)
}
ctx, sn, cleanup, err := newSnapshotter(context.Background(), snName)
require.NoError(t, err)
defer cleanup()
const direntByteSize = 4096
base1Snap := committedKey(ctx, t, sn, identity.NewID(), "",
fstest.CreateDir("foo", 0777),
fstest.CreateFile("foo/1", []byte("a"), 0777),
)
require.EqualValues(t, 3, base1Snap.Inodes)
require.EqualValues(t, 3*direntByteSize, base1Snap.Size)
base2Snap := committedKey(ctx, t, sn, identity.NewID(), "",
fstest.CreateDir("foo", 0777),
fstest.CreateFile("foo/2", []byte("aa"), 0777),
)
require.EqualValues(t, 3, base2Snap.Inodes)
require.EqualValues(t, 3*direntByteSize, base2Snap.Size)
base3Snap := committedKey(ctx, t, sn, identity.NewID(), "",
fstest.CreateDir("foo", 0777),
fstest.CreateFile("foo/3", []byte("aaa"), 0777),
fstest.CreateFile("bar", nil, 0777),
)
require.EqualValues(t, 4, base3Snap.Inodes)
require.EqualValues(t, 3*direntByteSize, base3Snap.Size)
mergeSnap := mergeKey(ctx, t, sn, identity.NewID(), []Diff{
{"", base1Snap.Name},
{"", base2Snap.Name},
{"", base3Snap.Name},
})
switch snName {
case "overlayfs", "native":
// / and /foo were created/copied. Others should be hard-linked
require.EqualValues(t, 2, mergeSnap.Inodes)
require.EqualValues(t, 2*direntByteSize, mergeSnap.Size)
case "native-nohardlink":
require.EqualValues(t, 6, mergeSnap.Inodes)
require.EqualValues(t, 5*direntByteSize, mergeSnap.Size)
}
})
}
}
type snapshotInfo struct {
snapshots.Info
snapshots.Usage
}
func getInfo(ctx context.Context, t *testing.T, sn *mergeSnapshotter, key string) snapshotInfo {
t.Helper()
info, err := sn.Stat(ctx, key)
require.NoError(t, err)
usage, err := sn.Usage(ctx, key)
require.NoError(t, err)
return snapshotInfo{info, usage}
}
func activeKey(
ctx context.Context,
t *testing.T,
sn *mergeSnapshotter,
key string,
parent string,
files ...fstest.Applier,
) snapshotInfo {
t.Helper()
err := sn.Prepare(ctx, key, parent)
require.NoError(t, err)
if len(files) > 0 {
mnts, cleanup := getMounts(ctx, t, sn, key)
defer cleanup()
mnter := LocalMounterWithMounts(mnts)
root, err := mnter.Mount()
require.NoError(t, err)
defer mnter.Unmount()
require.NoError(t, fstest.Apply(files...).Apply(root))
}
return getInfo(ctx, t, sn, key)
}
func commitActiveKey(
ctx context.Context,
t *testing.T,
sn *mergeSnapshotter,
name string,
activeKey string,
) snapshotInfo {
t.Helper()
err := sn.Commit(ctx, name, activeKey)
require.NoError(t, err)
return getInfo(ctx, t, sn, name)
}
func committedKey(
ctx context.Context,
t *testing.T,
sn *mergeSnapshotter,
key string,
parent string,
files ...fstest.Applier,
) snapshotInfo {
t.Helper()
prepareKey := identity.NewID()
activeKey(ctx, t, sn, prepareKey, parent, files...)
return commitActiveKey(ctx, t, sn, key, prepareKey)
}
func mergeKey(
ctx context.Context,
t *testing.T,
sn *mergeSnapshotter,
key string,
diffs []Diff,
) snapshotInfo {
t.Helper()
err := sn.Merge(ctx, key, diffs)
require.NoError(t, err)
return getInfo(ctx, t, sn, key)
}
func getMounts(ctx context.Context, t *testing.T, sn *mergeSnapshotter, key string) ([]mount.Mount, func() error) {
t.Helper()
var mntable Mountable
var err error
if info := getInfo(ctx, t, sn, key); info.Kind == snapshots.KindCommitted {
mntable, err = sn.View(ctx, identity.NewID(), key)
} else {
mntable, err = sn.Mounts(ctx, key)
}
require.NoError(t, err)
mnts, cleanup, err := mntable.Mount()
require.NoError(t, err)
return mnts, cleanup
}
func withMount(ctx context.Context, t *testing.T, sn *mergeSnapshotter, key string, f func(root string)) {
t.Helper()
mounts, cleanup := getMounts(ctx, t, sn, key)
defer cleanup()
mnter := LocalMounterWithMounts(mounts)
root, err := mnter.Mount()
require.NoError(t, err)
defer mnter.Unmount()
f(root)
}
func requireContents(ctx context.Context, t *testing.T, sn *mergeSnapshotter, key string, files ...fstest.Applier) {
t.Helper()
withMount(ctx, t, sn, key, func(root string) {
require.NoError(t, fstest.CheckDirectoryEqualWithApplier(root, fstest.Apply(files...)))
})
}
func trySyscallStat(t *testing.T, path string) *syscall.Stat_t {
t.Helper()
info, err := os.Stat(path)
if err == nil {
return info.Sys().(*syscall.Stat_t)
}
require.ErrorIs(t, err, os.ErrNotExist)
return nil
}
func requireMtime(t *testing.T, path string, mtime time.Time) {
t.Helper()
info, err := os.Lstat(path)
require.NoError(t, err)
stat := info.Sys().(*syscall.Stat_t)
require.Equal(t, mtime.UnixNano(), stat.Mtim.Nano())
}
func tryStatPath(ctx context.Context, t *testing.T, sn *mergeSnapshotter, key, path string) (st *syscall.Stat_t) {
t.Helper()
mounts, cleanup := getMounts(ctx, t, sn, key)
defer cleanup()
require.Len(t, mounts, 1)
mnt := mounts[0]
if mnt.Type == "overlay" {
var upperdir string
var lowerdirs []string
for _, opt := range mnt.Options {
if strings.HasPrefix(opt, "upperdir=") {
upperdir = strings.SplitN(opt, "upperdir=", 2)[1]
} else if strings.HasPrefix(opt, "lowerdir=") {
lowerdirs = strings.Split(strings.SplitN(opt, "lowerdir=", 2)[1], ":")
}
}
if upperdir != "" {
st = trySyscallStat(t, filepath.Join(upperdir, path))
if st != nil {
return st
}
}
for _, lowerdir := range lowerdirs {
st = trySyscallStat(t, filepath.Join(lowerdir, path))
if st != nil {
return st
}
}
return nil
}
withMount(ctx, t, sn, key, func(root string) {
st = trySyscallStat(t, filepath.Join(root, path))
})
return st
}
func statPath(ctx context.Context, t *testing.T, sn *mergeSnapshotter, key, path string) (st *syscall.Stat_t) {
t.Helper()
st = tryStatPath(ctx, t, sn, key, path)
require.NotNil(t, st)
return st
}
func requireRoot(t *testing.T) {
t.Helper()
if os.Getuid() != 0 {
t.Skip("test requires root")
}
}

10
solver/llbsolver/mounts/mount_test.go
View File

@ -12,6 +12,7 @@ import (
"github.com/containerd/containerd/content"
"github.com/containerd/containerd/content/local"
"github.com/containerd/containerd/diff/apply"
"github.com/containerd/containerd/diff/walking"
"github.com/containerd/containerd/leases"
ctdmetadata "github.com/containerd/containerd/metadata"
"github.com/containerd/containerd/namespaces"
@ -23,6 +24,7 @@ import (
containerdsnapshot "github.com/moby/buildkit/snapshot/containerd"
"github.com/moby/buildkit/solver/pb"
"github.com/moby/buildkit/util/leaseutil"
"github.com/moby/buildkit/util/winlayers"
"github.com/pkg/errors"
"github.com/stretchr/testify/require"
bolt "go.etcd.io/bbolt"
@ -109,6 +111,9 @@ func newCacheManager(ctx context.Context, opt cmOpt) (co *cmOut, cleanup func()
}
lm := leaseutil.WithNamespace(ctdmetadata.NewLeaseManager(mdb), ns)
c := mdb.ContentStore()
applier := winlayers.NewFileSystemApplierWithWindows(c, apply.NewFileSystemApplier(c))
differ := winlayers.NewWalkingDiffWithWindows(c, walking.NewWalkingDiff(c))
md, err := metadata.NewStore(filepath.Join(tmpdir, "metadata.db"))
if err != nil {
@ -118,10 +123,11 @@ func newCacheManager(ctx context.Context, opt cmOpt) (co *cmOut, cleanup func()
cm, err := cache.NewManager(cache.ManagerOpt{
Snapshotter: snapshot.FromContainerdSnapshotter(opt.snapshotterName, containerdsnapshot.NSSnapshotter(ns, mdb.Snapshotter(opt.snapshotterName)), nil),
MetadataStore: md,
ContentStore: mdb.ContentStore(),
ContentStore: c,
Applier: applier,
Differ: differ,
LeaseManager: lm,
GarbageCollect: mdb.GarbageCollect,
Applier: apply.NewFileSystemApplier(mdb.ContentStore()),
})
if err != nil {
return nil, nil, err

95
solver/llbsolver/ops/merge.go Normal file
View File

@ -0,0 +1,95 @@
package ops
import (
"context"
"encoding/json"
"fmt"
"strings"
"github.com/moby/buildkit/worker"
"github.com/pkg/errors"
"github.com/moby/buildkit/cache"
"github.com/moby/buildkit/session"
"github.com/moby/buildkit/solver"
"github.com/moby/buildkit/solver/llbsolver"
"github.com/moby/buildkit/solver/pb"
digest "github.com/opencontainers/go-digest"
)
const mergeCacheType = "buildkit.merge.v0"
type mergeOp struct {
op *pb.MergeOp
worker worker.Worker
}
func NewMergeOp(v solver.Vertex, op *pb.Op_Merge, w worker.Worker) (solver.Op, error) {
if err := llbsolver.ValidateOp(&pb.Op{Op: op}); err != nil {
return nil, err
}
return &mergeOp{
op: op.Merge,
worker: w,
}, nil
}
func (m *mergeOp) CacheMap(ctx context.Context, group session.Group, index int) (*solver.CacheMap, bool, error) {
dt, err := json.Marshal(struct {
Type string
Merge *pb.MergeOp
}{
Type: mergeCacheType,
Merge: m.op,
})
if err != nil {
return nil, false, err
}
cm := &solver.CacheMap{
Digest: digest.Digest(dt),
Deps: make([]struct {
Selector digest.Digest
ComputeDigestFunc solver.ResultBasedCacheFunc
PreprocessFunc solver.PreprocessFunc
}, len(m.op.Inputs)),
}
return cm, true, nil
}
func (m *mergeOp) Exec(ctx context.Context, g session.Group, inputs []solver.Result) ([]solver.Result, error) {
refs := make([]cache.ImmutableRef, len(inputs))
ids := make([]string, len(inputs))
var index int
for _, inp := range inputs {
if inp == nil {
continue
}
wref, ok := inp.Sys().(*worker.WorkerRef)
if !ok {
return nil, errors.Errorf("invalid reference for merge %T", inp.Sys())
}
refs[index] = wref.ImmutableRef
ids[index] = wref.ImmutableRef.ID()
index++
}
refs = refs[:index]
ids = ids[:index]
if len(refs) == 0 {
return nil, nil
}
mergedRef, err := m.worker.CacheManager().Merge(ctx, refs,
cache.WithDescription(fmt.Sprintf("merge %s", strings.Join(ids, ";"))))
if err != nil {
return nil, err
}
return []solver.Result{worker.NewWorkerRefResult(mergedRef, m.worker)}, nil
}
func (m *mergeOp) Acquire(ctx context.Context) (release solver.ReleaseFunc, err error) {
return func() {}, nil
}

2
solver/llbsolver/result.go
View File

@ -66,7 +66,7 @@ func NewContentHashFunc(selectors []Selector) solver.ResultBasedCacheFunc {
s,
)
if err != nil {
return err
return errors.Wrapf(err, "failed to calculate checksum of ref %s", ref.ID())
}
dgsts[i] = []byte(dgst)
return nil

37
solver/llbsolver/vertex.go
View File

@ -2,6 +2,7 @@ package llbsolver
import (
"fmt"
"strconv"
"strings"
"github.com/containerd/containerd/platforms"
@ -169,7 +170,11 @@ func newVertex(dgst digest.Digest, op *pb.Op, opMeta *pb.OpMetadata, load func(d
}
}
vtx := &vertex{sys: op, options: opt, digest: dgst, name: llbOpName(op)}
name, err := llbOpName(op, load)
if err != nil {
return nil, err
}
vtx := &vertex{sys: op, options: opt, digest: dgst, name: name}
for _, in := range op.Inputs {
sub, err := load(in.Digest)
if err != nil {
@ -242,25 +247,35 @@ func loadLLB(def *pb.Definition, fn func(digest.Digest, *pb.Op, func(digest.Dige
return solver.Edge{Vertex: v, Index: solver.Index(lastOp.Inputs[0].Index)}, nil
}
func llbOpName(op *pb.Op) string {
switch op := op.Op.(type) {
func llbOpName(pbOp *pb.Op, load func(digest.Digest) (solver.Vertex, error)) (string, error) {
switch op := pbOp.Op.(type) {
case *pb.Op_Source:
if id, err := source.FromLLB(op, nil); err == nil {
if id, ok := id.(*source.LocalIdentifier); ok {
if len(id.IncludePatterns) == 1 {
return op.Source.Identifier + " (" + id.IncludePatterns[0] + ")"
return op.Source.Identifier + " (" + id.IncludePatterns[0] + ")", nil
}
}
}
return op.Source.Identifier
return op.Source.Identifier, nil
case *pb.Op_Exec:
return strings.Join(op.Exec.Meta.Args, " ")
return strings.Join(op.Exec.Meta.Args, " "), nil
case *pb.Op_File:
return fileOpName(op.File.Actions)
return fileOpName(op.File.Actions), nil
case *pb.Op_Build:
return "build"
return "build", nil
case *pb.Op_Merge:
subnames := make([]string, len(pbOp.Inputs))
for i, inp := range pbOp.Inputs {
subvtx, err := load(inp.Digest)
if err != nil {
return "", err
}
subnames[i] = strconv.Quote(subvtx.Name())
}
return "merge " + strings.Join(subnames, " + "), nil
default:
return "unknown"
return "unknown", nil
}
}
@ -309,6 +324,10 @@ func ValidateOp(op *pb.Op) error {
if op.Build == nil {
return errors.Errorf("invalid nil build op")
}
case *pb.Op_Merge:
if op.Merge == nil {
return errors.Errorf("invalid nil merge op")
}
}
return nil
}

7
solver/pb/caps.go
View File

@ -66,6 +66,8 @@ const (
CapMetaExportCache apicaps.CapID = "meta.exportcache"
CapRemoteCacheGHA apicaps.CapID = "cache.gha"
CapMergeOp apicaps.CapID = "mergeop"
)
func init() {
@ -367,4 +369,9 @@ func init() {
Enabled: true,
Status: apicaps.CapStatusExperimental,
})
Caps.Init(apicaps.Cap{
ID: CapMergeOp,
Enabled: true,
Status: apicaps.CapStatusExperimental,
})
}

700
solver/pb/ops.pb.go
View File

@ -158,6 +158,7 @@ type Op struct {
// *Op_Source
// *Op_File
// *Op_Build
// *Op_Merge
Op isOp_Op `protobuf_oneof:"op"`
Platform *Platform `protobuf:"bytes,10,opt,name=platform,proto3" json:"platform,omitempty"`
Constraints *WorkerConstraints `protobuf:"bytes,11,opt,name=constraints,proto3" json:"constraints,omitempty"`
@ -210,11 +211,15 @@ type Op_File struct {
type Op_Build struct {
Build *BuildOp `protobuf:"bytes,5,opt,name=build,proto3,oneof" json:"build,omitempty"`
}
type Op_Merge struct {
Merge *MergeOp `protobuf:"bytes,6,opt,name=merge,proto3,oneof" json:"merge,omitempty"`
}
func (*Op_Exec) isOp_Op() {}
func (*Op_Source) isOp_Op() {}
func (*Op_File) isOp_Op() {}
func (*Op_Build) isOp_Op() {}
func (*Op_Merge) isOp_Op() {}
func (m *Op) GetOp() isOp_Op {
if m != nil {
@ -258,6 +263,13 @@ func (m *Op) GetBuild() *BuildOp {
return nil
}
func (m *Op) GetMerge() *MergeOp {
if x, ok := m.GetOp().(*Op_Merge); ok {
return x.Merge
}
return nil
}
func (m *Op) GetPlatform() *Platform {
if m != nil {
return m.Platform
@ -279,6 +291,7 @@ func (*Op) XXX_OneofWrappers() []interface{} {
(*Op_Source)(nil),
(*Op_File)(nil),
(*Op_Build)(nil),
(*Op_Merge)(nil),
}
}
@ -2430,6 +2443,79 @@ func (m *NamedUserOpt) GetName() string {
return ""
}
type MergeInput struct {
Input InputIndex `protobuf:"varint,1,opt,name=input,proto3,customtype=InputIndex" json:"input"`
}
func (m *MergeInput) Reset() { *m = MergeInput{} }
func (m *MergeInput) String() string { return proto.CompactTextString(m) }
func (*MergeInput) ProtoMessage() {}
func (*MergeInput) Descriptor() ([]byte, []int) {
return fileDescriptor_8de16154b2733812, []int{35}
}
func (m *MergeInput) XXX_Unmarshal(b []byte) error {
return m.Unmarshal(b)
}
func (m *MergeInput) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
b = b[:cap(b)]
n, err := m.MarshalToSizedBuffer(b)
if err != nil {
return nil, err
}
return b[:n], nil
}
func (m *MergeInput) XXX_Merge(src proto.Message) {
xxx_messageInfo_MergeInput.Merge(m, src)
}
func (m *MergeInput) XXX_Size() int {
return m.Size()
}
func (m *MergeInput) XXX_DiscardUnknown() {
xxx_messageInfo_MergeInput.DiscardUnknown(m)
}
var xxx_messageInfo_MergeInput proto.InternalMessageInfo
type MergeOp struct {
Inputs []*MergeInput `protobuf:"bytes,1,rep,name=inputs,proto3" json:"inputs,omitempty"`
}
func (m *MergeOp) Reset() { *m = MergeOp{} }
func (m *MergeOp) String() string { return proto.CompactTextString(m) }
func (*MergeOp) ProtoMessage() {}
func (*MergeOp) Descriptor() ([]byte, []int) {
return fileDescriptor_8de16154b2733812, []int{36}
}
func (m *MergeOp) XXX_Unmarshal(b []byte) error {
return m.Unmarshal(b)
}
func (m *MergeOp) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
b = b[:cap(b)]
n, err := m.MarshalToSizedBuffer(b)
if err != nil {
return nil, err
}
return b[:n], nil
}
func (m *MergeOp) XXX_Merge(src proto.Message) {
xxx_messageInfo_MergeOp.Merge(m, src)
}
func (m *MergeOp) XXX_Size() int {
return m.Size()
}
func (m *MergeOp) XXX_DiscardUnknown() {
xxx_messageInfo_MergeOp.DiscardUnknown(m)
}
var xxx_messageInfo_MergeOp proto.InternalMessageInfo
func (m *MergeOp) GetInputs() []*MergeInput {
if m != nil {
return m.Inputs
}
return nil
}
func init() {
proto.RegisterEnum("pb.NetMode", NetMode_name, NetMode_value)
proto.RegisterEnum("pb.SecurityMode", SecurityMode_name, SecurityMode_value)
@ -2477,159 +2563,164 @@ func init() {
proto.RegisterType((*ChownOpt)(nil), "pb.ChownOpt")
proto.RegisterType((*UserOpt)(nil), "pb.UserOpt")
proto.RegisterType((*NamedUserOpt)(nil), "pb.NamedUserOpt")
proto.RegisterType((*MergeInput)(nil), "pb.MergeInput")
proto.RegisterType((*MergeOp)(nil), "pb.MergeOp")
}
func init() { proto.RegisterFile("ops.proto", fileDescriptor_8de16154b2733812) }
var fileDescriptor_8de16154b2733812 = []byte{
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}
func (m *Op) Marshal() (dAtA []byte, err error) {
@ -2786,6 +2877,27 @@ func (m *Op_Build) MarshalToSizedBuffer(dAtA []byte) (int, error) {
}
return len(dAtA) - i, nil
}
func (m *Op_Merge) MarshalTo(dAtA []byte) (int, error) {
size := m.Size()
return m.MarshalToSizedBuffer(dAtA[:size])
}
func (m *Op_Merge) MarshalToSizedBuffer(dAtA []byte) (int, error) {
i := len(dAtA)
if m.Merge != nil {
{
size, err := m.Merge.MarshalToSizedBuffer(dAtA[:i])
if err != nil {
return 0, err
}
i -= size
i = encodeVarintOps(dAtA, i, uint64(size))
}
i--
dAtA[i] = 0x32
}
return len(dAtA) - i, nil
}
func (m *Platform) Marshal() (dAtA []byte, err error) {
size := m.Size()
dAtA = make([]byte, size)
@ -4790,6 +4902,71 @@ func (m *NamedUserOpt) MarshalToSizedBuffer(dAtA []byte) (int, error) {
return len(dAtA) - i, nil
}
func (m *MergeInput) Marshal() (dAtA []byte, err error) {
size := m.Size()
dAtA = make([]byte, size)
n, err := m.MarshalToSizedBuffer(dAtA[:size])
if err != nil {
return nil, err
}
return dAtA[:n], nil
}
func (m *MergeInput) MarshalTo(dAtA []byte) (int, error) {
size := m.Size()
return m.MarshalToSizedBuffer(dAtA[:size])
}
func (m *MergeInput) MarshalToSizedBuffer(dAtA []byte) (int, error) {
i := len(dAtA)
_ = i
var l int
_ = l
if m.Input != 0 {
i = encodeVarintOps(dAtA, i, uint64(m.Input))
i--
dAtA[i] = 0x8
}
return len(dAtA) - i, nil
}
func (m *MergeOp) Marshal() (dAtA []byte, err error) {
size := m.Size()
dAtA = make([]byte, size)
n, err := m.MarshalToSizedBuffer(dAtA[:size])
if err != nil {
return nil, err
}
return dAtA[:n], nil
}
func (m *MergeOp) MarshalTo(dAtA []byte) (int, error) {
size := m.Size()
return m.MarshalToSizedBuffer(dAtA[:size])
}
func (m *MergeOp) MarshalToSizedBuffer(dAtA []byte) (int, error) {
i := len(dAtA)
_ = i
var l int
_ = l
if len(m.Inputs) > 0 {
for iNdEx := len(m.Inputs) - 1; iNdEx >= 0; iNdEx-- {
{
size, err := m.Inputs[iNdEx].MarshalToSizedBuffer(dAtA[:i])
if err != nil {
return 0, err
}
i -= size
i = encodeVarintOps(dAtA, i, uint64(size))
}
i--
dAtA[i] = 0xa
}
}
return len(dAtA) - i, nil
}
func encodeVarintOps(dAtA []byte, offset int, v uint64) int {
offset -= sovOps(v)
base := offset
@ -4875,6 +5052,18 @@ func (m *Op_Build) Size() (n int) {
}
return n
}
func (m *Op_Merge) Size() (n int) {
if m == nil {
return 0
}
var l int
_ = l
if m.Merge != nil {
l = m.Merge.Size()
n += 1 + l + sovOps(uint64(l))
}
return n
}
func (m *Platform) Size() (n int) {
if m == nil {
return 0
@ -5738,6 +5927,33 @@ func (m *NamedUserOpt) Size() (n int) {
return n
}
func (m *MergeInput) Size() (n int) {
if m == nil {
return 0
}
var l int
_ = l
if m.Input != 0 {
n += 1 + sovOps(uint64(m.Input))
}
return n
}
func (m *MergeOp) Size() (n int) {
if m == nil {
return 0
}
var l int
_ = l
if len(m.Inputs) > 0 {
for _, e := range m.Inputs {
l = e.Size()
n += 1 + l + sovOps(uint64(l))
}
}
return n
}
func sovOps(x uint64) (n int) {
return (math_bits.Len64(x|1) + 6) / 7
}
@ -5947,6 +6163,41 @@ func (m *Op) Unmarshal(dAtA []byte) error {
}
m.Op = &Op_Build{v}
iNdEx = postIndex
case 6:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Merge", wireType)
}
var msglen int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowOps
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
msglen |= int(b&0x7F) << shift
if b < 0x80 {
break
}
}
if msglen < 0 {
return ErrInvalidLengthOps
}
postIndex := iNdEx + msglen
if postIndex < 0 {
return ErrInvalidLengthOps
}
if postIndex > l {
return io.ErrUnexpectedEOF
}
v := &MergeOp{}
if err := v.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
return err
}
m.Op = &Op_Merge{v}
iNdEx = postIndex
case 10:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Platform", wireType)
@ -11815,6 +12066,159 @@ func (m *NamedUserOpt) Unmarshal(dAtA []byte) error {
}
return nil
}
func (m *MergeInput) Unmarshal(dAtA []byte) error {
l := len(dAtA)
iNdEx := 0
for iNdEx < l {
preIndex := iNdEx
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowOps
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= uint64(b&0x7F) << shift
if b < 0x80 {
break
}
}
fieldNum := int32(wire >> 3)
wireType := int(wire & 0x7)
if wireType == 4 {
return fmt.Errorf("proto: MergeInput: wiretype end group for non-group")
}
if fieldNum <= 0 {
return fmt.Errorf("proto: MergeInput: illegal tag %d (wire type %d)", fieldNum, wire)
}
switch fieldNum {
case 1:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field Input", wireType)
}
m.Input = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowOps
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.Input |= InputIndex(b&0x7F) << shift
if b < 0x80 {
break
}
}
default:
iNdEx = preIndex
skippy, err := skipOps(dAtA[iNdEx:])
if err != nil {
return err
}
if (skippy < 0) || (iNdEx+skippy) < 0 {
return ErrInvalidLengthOps
}
if (iNdEx + skippy) > l {
return io.ErrUnexpectedEOF
}
iNdEx += skippy
}
}
if iNdEx > l {
return io.ErrUnexpectedEOF
}
return nil
}
func (m *MergeOp) Unmarshal(dAtA []byte) error {
l := len(dAtA)
iNdEx := 0
for iNdEx < l {
preIndex := iNdEx
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowOps
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= uint64(b&0x7F) << shift
if b < 0x80 {
break
}
}
fieldNum := int32(wire >> 3)
wireType := int(wire & 0x7)
if wireType == 4 {
return fmt.Errorf("proto: MergeOp: wiretype end group for non-group")
}
if fieldNum <= 0 {
return fmt.Errorf("proto: MergeOp: illegal tag %d (wire type %d)", fieldNum, wire)
}
switch fieldNum {
case 1:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Inputs", wireType)
}
var msglen int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowOps
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
msglen |= int(b&0x7F) << shift
if b < 0x80 {
break
}
}
if msglen < 0 {
return ErrInvalidLengthOps
}
postIndex := iNdEx + msglen
if postIndex < 0 {
return ErrInvalidLengthOps
}
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.Inputs = append(m.Inputs, &MergeInput{})
if err := m.Inputs[len(m.Inputs)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
return err
}
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipOps(dAtA[iNdEx:])
if err != nil {
return err
}
if (skippy < 0) || (iNdEx+skippy) < 0 {
return ErrInvalidLengthOps
}
if (iNdEx + skippy) > l {
return io.ErrUnexpectedEOF
}
iNdEx += skippy
}
}
if iNdEx > l {
return io.ErrUnexpectedEOF
}
return nil
}
func skipOps(dAtA []byte) (n int, err error) {
l := len(dAtA)
iNdEx := 0

9
solver/pb/ops.proto
View File

@ -17,6 +17,7 @@ message Op {
SourceOp source = 3;
FileOp file = 4;
BuildOp build = 5;
MergeOp merge = 6;
}
Platform platform = 10;
WorkerConstraints constraints = 11;
@ -363,3 +364,11 @@ message NamedUserOpt {
string name = 1;
int64 input = 2 [(gogoproto.customtype) = "InputIndex", (gogoproto.nullable) = false];
}
message MergeInput {
int64 input = 1 [(gogoproto.customtype) = "InputIndex", (gogoproto.nullable) = false];
}
message MergeOp {
repeated MergeInput inputs = 1;
}

2
source/containerimage/pull.go
View File

@ -33,7 +33,7 @@ import (
"github.com/moby/buildkit/util/progress/controller"
"github.com/moby/buildkit/util/pull"
"github.com/moby/buildkit/util/resolver"
"github.com/opencontainers/go-digest"
digest "github.com/opencontainers/go-digest"
"github.com/opencontainers/image-spec/identity"
ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"

10
source/git/gitsource_test.go
View File

@ -11,6 +11,8 @@ import (
"testing"
"github.com/containerd/containerd/content/local"
"github.com/containerd/containerd/diff/apply"
"github.com/containerd/containerd/diff/walking"
ctdmetadata "github.com/containerd/containerd/metadata"
"github.com/containerd/containerd/namespaces"
"github.com/containerd/containerd/snapshots"
@ -22,6 +24,7 @@ import (
containerdsnapshot "github.com/moby/buildkit/snapshot/containerd"
"github.com/moby/buildkit/source"
"github.com/moby/buildkit/util/leaseutil"
"github.com/moby/buildkit/util/winlayers"
"github.com/pkg/errors"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
@ -456,12 +459,17 @@ func setupGitSource(t *testing.T, tmpdir string) source.Source {
md, err := metadata.NewStore(filepath.Join(tmpdir, "metadata.db"))
require.NoError(t, err)
lm := leaseutil.WithNamespace(ctdmetadata.NewLeaseManager(mdb), "buildkit")
c := mdb.ContentStore()
applier := winlayers.NewFileSystemApplierWithWindows(c, apply.NewFileSystemApplier(c))
differ := winlayers.NewWalkingDiffWithWindows(c, walking.NewWalkingDiff(c))
cm, err := cache.NewManager(cache.ManagerOpt{
Snapshotter: snapshot.FromContainerdSnapshotter("native", containerdsnapshot.NSSnapshotter("buildkit", mdb.Snapshotter("native")), nil),
MetadataStore: md,
LeaseManager: lm,
ContentStore: mdb.ContentStore(),
ContentStore: c,
Applier: applier,
Differ: differ,
GarbageCollect: mdb.GarbageCollect,
})
require.NoError(t, err)

10
source/http/httpsource_test.go
View File

@ -9,6 +9,8 @@ import (
"testing"
"github.com/containerd/containerd/content/local"
"github.com/containerd/containerd/diff/apply"
"github.com/containerd/containerd/diff/walking"
ctdmetadata "github.com/containerd/containerd/metadata"
"github.com/containerd/containerd/snapshots"
"github.com/containerd/containerd/snapshots/native"
@ -20,6 +22,7 @@ import (
"github.com/moby/buildkit/source"
"github.com/moby/buildkit/util/leaseutil"
"github.com/moby/buildkit/util/testutil/httpserver"
"github.com/moby/buildkit/util/winlayers"
digest "github.com/opencontainers/go-digest"
"github.com/stretchr/testify/require"
bolt "go.etcd.io/bbolt"
@ -359,12 +362,17 @@ func newHTTPSource(tmpdir string) (source.Source, error) {
return nil, err
}
lm := leaseutil.WithNamespace(ctdmetadata.NewLeaseManager(mdb), "buildkit")
c := mdb.ContentStore()
applier := winlayers.NewFileSystemApplierWithWindows(c, apply.NewFileSystemApplier(c))
differ := winlayers.NewWalkingDiffWithWindows(c, walking.NewWalkingDiff(c))
cm, err := cache.NewManager(cache.ManagerOpt{
Snapshotter: snapshot.FromContainerdSnapshotter("native", containerdsnapshot.NSSnapshotter("buildkit", mdb.Snapshotter("native")), nil),
MetadataStore: md,
LeaseManager: lm,
ContentStore: mdb.ContentStore(),
ContentStore: c,
Applier: applier,
Differ: differ,
GarbageCollect: mdb.GarbageCollect,
})
if err != nil {

2
source/local/local.go
View File

@ -117,6 +117,8 @@ func (ls *localSourceHandler) snapshot(ctx context.Context, s session.Group, cal
bklog.G(ctx).Debugf("reusing ref for local: %s", m.ID())
mutable = m
break
} else {
bklog.G(ctx).Debugf("not reusing ref %s for local: %v", si.ID(), err)
}
}

7
util/overlay/overlay_linux.go
View File

@ -174,7 +174,8 @@ func Changes(ctx context.Context, changeFn fs.ChangeFunc, upperdir, upperdirView
if isDelete {
// This is a deleted entry.
kind = fs.ChangeKindDelete
f = nil
// Leave f set to the FileInfo for the whiteout device in case the caller wants it, e.g.
// the merge code uses it to hardlink in the whiteout device to merged snapshots
} else if baseF, err := os.Lstat(filepath.Join(base, path)); err == nil {
// File exists in the base layer. Thus this is modified.
kind = fs.ChangeKindModify
@ -185,11 +186,11 @@ func Changes(ctx context.Context, changeFn fs.ChangeFunc, upperdir, upperdirView
} else if err != nil {
return err
}
} else if os.IsNotExist(err) {
} else if os.IsNotExist(err) || errors.Is(err, unix.ENOTDIR) {
// File doesn't exist in the base layer. Thus this is added.
kind = fs.ChangeKindAdd
} else if err != nil {
return err
return errors.Wrap(err, "failed to stat base file during overlay diff")
}
if !skipRecord {

2
worker/base/worker.go
View File

@ -267,6 +267,8 @@ func (w *Worker) ResolveOp(v solver.Vertex, s frontend.FrontendLLBBridge, sm *se
return ops.NewFileOp(v, op, w.CacheMgr, w.ParallelismSem, w)
case *pb.Op_Build:
return ops.NewBuildOp(v, op, s, w)
case *pb.Op_Merge:
return ops.NewMergeOp(v, op, w)
default:
return nil, errors.Errorf("no support for %T", op)
}