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containerd.go
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containerd.go
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package containerd
import (
"context"
"os"
"path/filepath"
"strings"
"github.com/containerd/containerd"
"github.com/containerd/containerd/gc"
"github.com/containerd/containerd/leases"
"github.com/moby/buildkit/cache"
"github.com/moby/buildkit/cache/metadata"
"github.com/moby/buildkit/executor/containerdexecutor"
"github.com/moby/buildkit/executor/oci"
containerdsnapshot "github.com/moby/buildkit/snapshot/containerd"
"github.com/moby/buildkit/util/leaseutil"
"github.com/moby/buildkit/util/network/netproviders"
"github.com/moby/buildkit/util/winlayers"
"github.com/moby/buildkit/worker/base"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/pkg/errors"
)
// NewWorkerOpt creates a WorkerOpt.
func NewWorkerOpt(root string, address, snapshotterName, ns string, labels map[string]string, dns *oci.DNSConfig, nopt netproviders.Opt, apparmorProfile string, opts ...containerd.ClientOpt) (base.WorkerOpt, error) {
opts = append(opts, containerd.WithDefaultNamespace(ns))
client, err := containerd.New(address, opts...)
if err != nil {
return base.WorkerOpt{}, errors.Wrapf(err, "failed to connect client to %q . make sure containerd is running", address)
}
return newContainerd(root, client, snapshotterName, ns, labels, dns, nopt, apparmorProfile)
}
func newContainerd(root string, client *containerd.Client, snapshotterName, ns string, labels map[string]string, dns *oci.DNSConfig, nopt netproviders.Opt, apparmorProfile string) (base.WorkerOpt, error) {
if strings.Contains(snapshotterName, "/") {
return base.WorkerOpt{}, errors.Errorf("bad snapshotter name: %q", snapshotterName)
}
name := "containerd-" + snapshotterName
root = filepath.Join(root, name)
if err := os.MkdirAll(root, 0700); err != nil {
return base.WorkerOpt{}, errors.Wrapf(err, "failed to create %s", root)
}
df := client.DiffService()
// TODO: should use containerd daemon instance ID (containerd/containerd#1862)?
id, err := base.ID(root)
if err != nil {
return base.WorkerOpt{}, err
}
xlabels := base.Labels("containerd", snapshotterName)
for k, v := range labels {
xlabels[k] = v
}
lm := leaseutil.WithNamespace(client.LeasesService(), ns)
gc := func(ctx context.Context) (gc.Stats, error) {
l, err := lm.Create(ctx)
if err != nil {
return nil, nil
}
return nil, lm.Delete(ctx, leases.Lease{ID: l.ID}, leases.SynchronousDelete)
}
cs := containerdsnapshot.NewContentStore(client.ContentStore(), ns)
resp, err := client.IntrospectionService().Plugins(context.TODO(), []string{"type==io.containerd.runtime.v1", "type==io.containerd.runtime.v2"})
if err != nil {
return base.WorkerOpt{}, errors.Wrap(err, "failed to list runtime plugin")
}
if len(resp.Plugins) == 0 {
return base.WorkerOpt{}, errors.New("failed to find any runtime plugins")
}
var platforms []specs.Platform
for _, plugin := range resp.Plugins {
for _, p := range plugin.Platforms {
platforms = append(platforms, specs.Platform{
OS: p.OS,
Architecture: p.Architecture,
Variant: p.Variant,
})
}
}
np, err := netproviders.Providers(nopt)
if err != nil {
return base.WorkerOpt{}, err
}
snap := containerdsnapshot.NewSnapshotter(snapshotterName, client.SnapshotService(snapshotterName), ns, nil)
if err := cache.MigrateV2(context.TODO(), filepath.Join(root, "metadata.db"), filepath.Join(root, "metadata_v2.db"), cs, snap, lm); err != nil {
return base.WorkerOpt{}, err
}
md, err := metadata.NewStore(filepath.Join(root, "metadata_v2.db"))
if err != nil {
return base.WorkerOpt{}, err
}
opt := base.WorkerOpt{
ID: id,
Labels: xlabels,
MetadataStore: md,
Executor: containerdexecutor.New(client, root, "", np, dns, apparmorProfile),
Snapshotter: snap,
ContentStore: cs,
Applier: winlayers.NewFileSystemApplierWithWindows(cs, df),
Differ: winlayers.NewWalkingDiffWithWindows(cs, df),
ImageStore: client.ImageService(),
Platforms: platforms,
LeaseManager: lm,
GarbageCollect: gc,
}
return opt, nil
}