116 lines
3.3 KiB
Go
116 lines
3.3 KiB
Go
// +build standalone
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package control
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import (
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"context"
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"os"
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"path/filepath"
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"github.com/containerd/containerd/content/local"
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"github.com/containerd/containerd/differ"
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"github.com/containerd/containerd/mount"
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"github.com/containerd/containerd/namespaces"
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ctdsnapshot "github.com/containerd/containerd/snapshot"
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"github.com/containerd/containerd/snapshot/overlay"
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"github.com/moby/buildkit/worker/runcworker"
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"github.com/pkg/errors"
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)
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func NewStandalone(root string) (*Controller, error) {
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if err := os.MkdirAll(root, 0700); err != nil {
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return nil, errors.Wrapf(err, "failed to create %s", root)
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}
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// TODO: take lock to make sure there are no duplicates
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pd, err := newStandalonePullDeps(root)
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if err != nil {
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return nil, err
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}
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opt, err := defaultControllerOpts(root, *pd)
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if err != nil {
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return nil, err
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}
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w, err := runcworker.New(filepath.Join(root, "runc"))
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if err != nil {
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return nil, err
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}
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opt.Worker = w
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return NewController(*opt)
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}
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func newStandalonePullDeps(root string) (*pullDeps, error) {
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s, err := overlay.NewSnapshotter(filepath.Join(root, "snapshots"))
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if err != nil {
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return nil, err
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}
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c, err := local.NewStore(filepath.Join(root, "content"))
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if err != nil {
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return nil, err
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}
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df, err := differ.NewWalkingDiff(c)
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if err != nil {
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return nil, err
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}
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return &pullDeps{
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Snapshotter: &nsSnapshotter{s},
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ContentStore: c,
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Applier: df,
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Differ: df,
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}, nil
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}
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// this should be supported by containerd. currently packages are unusable without wrapping
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const dummyNs = "buildkit"
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type nsSnapshotter struct {
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ctdsnapshot.Snapshotter
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}
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func (s *nsSnapshotter) Stat(ctx context.Context, key string) (ctdsnapshot.Info, error) {
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ctx = namespaces.WithNamespace(ctx, dummyNs)
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return s.Snapshotter.Stat(ctx, key)
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}
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func (s *nsSnapshotter) Update(ctx context.Context, info ctdsnapshot.Info, fieldpaths ...string) (ctdsnapshot.Info, error) {
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ctx = namespaces.WithNamespace(ctx, dummyNs)
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return s.Snapshotter.Update(ctx, info, fieldpaths...)
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}
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func (s *nsSnapshotter) Usage(ctx context.Context, key string) (ctdsnapshot.Usage, error) {
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ctx = namespaces.WithNamespace(ctx, dummyNs)
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return s.Snapshotter.Usage(ctx, key)
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}
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func (s *nsSnapshotter) Mounts(ctx context.Context, key string) ([]mount.Mount, error) {
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ctx = namespaces.WithNamespace(ctx, dummyNs)
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return s.Snapshotter.Mounts(ctx, key)
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}
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func (s *nsSnapshotter) Prepare(ctx context.Context, key, parent string, opts ...ctdsnapshot.Opt) ([]mount.Mount, error) {
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ctx = namespaces.WithNamespace(ctx, dummyNs)
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return s.Snapshotter.Prepare(ctx, key, parent, opts...)
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}
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func (s *nsSnapshotter) View(ctx context.Context, key, parent string, opts ...ctdsnapshot.Opt) ([]mount.Mount, error) {
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ctx = namespaces.WithNamespace(ctx, dummyNs)
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return s.Snapshotter.View(ctx, key, parent, opts...)
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}
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func (s *nsSnapshotter) Commit(ctx context.Context, name, key string, opts ...ctdsnapshot.Opt) error {
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ctx = namespaces.WithNamespace(ctx, dummyNs)
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return s.Snapshotter.Commit(ctx, name, key, opts...)
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}
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func (s *nsSnapshotter) Remove(ctx context.Context, key string) error {
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ctx = namespaces.WithNamespace(ctx, dummyNs)
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return s.Snapshotter.Remove(ctx, key)
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}
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func (s *nsSnapshotter) Walk(ctx context.Context, fn func(context.Context, ctdsnapshot.Info) error) error {
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ctx = namespaces.WithNamespace(ctx, dummyNs)
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return s.Snapshotter.Walk(ctx, fn)
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}
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