103 lines
2.7 KiB
Go
103 lines
2.7 KiB
Go
package runc
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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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"time"
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"github.com/boltdb/bolt"
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"github.com/containerd/containerd/content/local"
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"github.com/containerd/containerd/diff/apply"
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"github.com/containerd/containerd/diff/walking"
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ctdmetadata "github.com/containerd/containerd/metadata"
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ctdsnapshot "github.com/containerd/containerd/snapshots"
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"github.com/moby/buildkit/cache/metadata"
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"github.com/moby/buildkit/executor/runcexecutor"
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containerdsnapshot "github.com/moby/buildkit/snapshot/containerd"
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"github.com/moby/buildkit/util/throttle"
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"github.com/moby/buildkit/worker/base"
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"github.com/sirupsen/logrus"
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)
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// SnapshotterFactory instantiates a snapshotter
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type SnapshotterFactory struct {
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Name string
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New func(root string) (ctdsnapshot.Snapshotter, error)
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}
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// NewWorkerOpt creates a WorkerOpt.
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// But it does not set the following fields:
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// - SessionManager
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func NewWorkerOpt(root string, snFactory SnapshotterFactory, labels map[string]string) (base.WorkerOpt, error) {
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var opt base.WorkerOpt
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name := "runc-" + snFactory.Name
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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 opt, err
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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 opt, err
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}
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exe, err := runcexecutor.New(runcexecutor.Opt{Root: filepath.Join(root, "executor")})
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if err != nil {
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return opt, err
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}
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s, err := snFactory.New(filepath.Join(root, "snapshots"))
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if err != nil {
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return opt, 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 opt, err
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}
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db, err := bolt.Open(filepath.Join(root, "containerdmeta.db"), 0644, nil)
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if err != nil {
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return opt, err
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}
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mdb := ctdmetadata.NewDB(db, c, map[string]ctdsnapshot.Snapshotter{
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snFactory.Name: s,
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})
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if err := mdb.Init(context.TODO()); err != nil {
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return opt, err
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}
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throttledGC := throttle.Throttle(time.Second, func() {
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if _, err := mdb.GarbageCollect(context.TODO()); 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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c = containerdsnapshot.NewContentStore(mdb.ContentStore(), "buildkit", gc)
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id, err := base.ID(root)
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if err != nil {
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return opt, err
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}
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xlabels := base.Labels("oci", snFactory.Name)
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for k, v := range labels {
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xlabels[k] = v
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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: exe,
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Snapshotter: containerdsnapshot.NewSnapshotter(mdb.Snapshotter(snFactory.Name), c, md, "buildkit", gc),
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ContentStore: c,
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Applier: apply.NewFileSystemApplier(c),
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Differ: walking.NewWalkingDiff(c),
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ImageStore: nil, // explicitly
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}
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return opt, nil
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}
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