118 lines
3.9 KiB
Go
118 lines
3.9 KiB
Go
package containerd
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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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"strings"
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"time"
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"github.com/containerd/containerd"
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introspection "github.com/containerd/containerd/api/services/introspection/v1"
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"github.com/containerd/containerd/namespaces"
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"github.com/containerd/containerd/snapshots"
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"github.com/moby/buildkit/cache/metadata"
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"github.com/moby/buildkit/executor/containerdexecutor"
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"github.com/moby/buildkit/identity"
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containerdsnapshot "github.com/moby/buildkit/snapshot/containerd"
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"github.com/moby/buildkit/util/network"
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"github.com/moby/buildkit/util/throttle"
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"github.com/moby/buildkit/util/winlayers"
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"github.com/moby/buildkit/worker/base"
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specs "github.com/opencontainers/image-spec/specs-go/v1"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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)
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// NewWorkerOpt creates a WorkerOpt.
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func NewWorkerOpt(root string, address, snapshotterName, ns string, labels map[string]string, opts ...containerd.ClientOpt) (base.WorkerOpt, error) {
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opts = append(opts, containerd.WithDefaultNamespace(ns))
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client, err := containerd.New(address, opts...)
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if err != nil {
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return base.WorkerOpt{}, errors.Wrapf(err, "failed to connect client to %q . make sure containerd is running", address)
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}
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return newContainerd(root, client, snapshotterName, ns, labels)
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}
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func newContainerd(root string, client *containerd.Client, snapshotterName, ns string, labels map[string]string) (base.WorkerOpt, error) {
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if strings.Contains(snapshotterName, "/") {
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return base.WorkerOpt{}, errors.Errorf("bad snapshotter name: %q", snapshotterName)
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}
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name := "containerd-" + snapshotterName
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root = filepath.Join(root, name)
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if err := os.MkdirAll(root, 0700); err != nil {
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return base.WorkerOpt{}, errors.Wrapf(err, "failed to create %s", root)
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}
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md, err := metadata.NewStore(filepath.Join(root, "metadata.db"))
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if err != nil {
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return base.WorkerOpt{}, err
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}
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df := client.DiffService()
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// TODO: should use containerd daemon instance ID (containerd/containerd#1862)?
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id, err := base.ID(root)
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if err != nil {
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return base.WorkerOpt{}, err
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}
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xlabels := base.Labels("containerd", snapshotterName)
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for k, v := range labels {
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xlabels[k] = v
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}
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throttledGC := throttle.Throttle(time.Second, func() {
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// TODO: how to avoid this?
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ctx := context.TODO()
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snapshotter := client.SnapshotService(snapshotterName)
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ctx = namespaces.WithNamespace(ctx, ns)
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key := identity.NewID()
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if _, err := snapshotter.Prepare(ctx, key, "", snapshots.WithLabels(map[string]string{
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"containerd.io/gc.root": time.Now().UTC().Format(time.RFC3339Nano),
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})); err != nil {
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logrus.Errorf("GC error: %+v", err)
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}
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if err := snapshotter.Remove(ctx, key); err != nil {
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logrus.Errorf("GC error: %+v", err)
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}
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})
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gc := func(ctx context.Context) error {
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throttledGC()
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return nil
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}
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cs := containerdsnapshot.NewContentStore(client.ContentStore(), ns, gc)
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resp, err := client.IntrospectionService().Plugins(context.TODO(), &introspection.PluginsRequest{Filters: []string{"type==io.containerd.runtime.v1"}})
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if err != nil {
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return base.WorkerOpt{}, errors.Wrap(err, "failed to list runtime plugin")
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}
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if len(resp.Plugins) == 0 {
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return base.WorkerOpt{}, errors.Wrap(err, "failed to get runtime plugin")
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}
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var platforms []specs.Platform
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for _, plugin := range resp.Plugins {
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for _, p := range plugin.Platforms {
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platforms = append(platforms, specs.Platform{
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OS: p.OS,
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Architecture: p.Architecture,
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Variant: p.Variant,
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})
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}
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}
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opt := base.WorkerOpt{
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ID: id,
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Labels: xlabels,
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MetadataStore: md,
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Executor: containerdexecutor.New(client, root, "", network.Default()),
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Snapshotter: containerdsnapshot.NewSnapshotter(client.SnapshotService(snapshotterName), cs, md, ns, gc),
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ContentStore: cs,
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Applier: winlayers.NewFileSystemApplierWithWindows(cs, df),
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Differ: winlayers.NewWalkingDiffWithWindows(cs, df),
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ImageStore: client.ImageService(),
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Platforms: platforms,
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}
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return opt, nil
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}
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