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//go:build !windows
package containerdexecutor
import (
"context"
"os"
"runtime"
"github.com/containerd/containerd"
"github.com/containerd/containerd/mount"
containerdoci "github.com/containerd/containerd/oci"
"github.com/containerd/continuity/fs"
"github.com/docker/docker/pkg/idtools"
"github.com/moby/buildkit/executor"
"github.com/moby/buildkit/executor/oci"
"github.com/moby/buildkit/snapshot"
"github.com/moby/buildkit/solver/pb"
"github.com/moby/buildkit/util/bklog"
"github.com/moby/buildkit/util/network"
rootlessspecconv "github.com/moby/buildkit/util/rootless/specconv"
"github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
)
func getUserSpec(user, rootfsPath string) (specs.User, error) {
var err error
var uid, gid uint32
var sgids []uint32
if rootfsPath != "" {
uid, gid, sgids, err = oci.GetUser(rootfsPath, user)
} else {
uid, gid, err = oci.ParseUIDGID(user)
}
if err != nil {
return specs.User{}, errors.WithStack(err)
}
return specs.User{
UID: uid,
GID: gid,
AdditionalGids: sgids,
}, nil
}
func (w *containerdExecutor) prepareExecutionEnv(ctx context.Context, rootMount executor.Mount, mounts []executor.Mount, meta executor.Meta, details *containerState, netMode pb.NetMode) (string, string, func(), error) {
var releasers []func()
releaseAll := func() {
for i := len(releasers) - 1; i >= 0; i-- {
releasers[i]()
}
}
resolvConf, err := oci.GetResolvConf(ctx, w.root, nil, w.dnsConfig, netMode)
if err != nil {
releaseAll()
return "", "", nil, err
}
hostsFile, clean, err := oci.GetHostsFile(ctx, w.root, meta.ExtraHosts, nil, meta.Hostname)
if err != nil {
releaseAll()
return "", "", nil, err
}
if clean != nil {
releasers = append(releasers, clean)
}
mountable, err := rootMount.Src.Mount(ctx, false)
if err != nil {
releaseAll()
return "", "", nil, err
}
rootMounts, release, err := mountable.Mount()
if err != nil {
releaseAll()
return "", "", nil, err
}
details.rootMounts = rootMounts
if release != nil {
releasers = append(releasers, func() {
if err := release(); err != nil {
bklog.G(ctx).WithError(err).Error("failed to release root mount")
}
})
}
lm := snapshot.LocalMounterWithMounts(rootMounts)
rootfsPath, err := lm.Mount()
if err != nil {
releaseAll()
return "", "", nil, err
}
details.rootfsPath = rootfsPath
releasers = append(releasers, func() {
if err := lm.Unmount(); err != nil {
bklog.G(ctx).WithError(err).Error("failed to unmount rootfs")
}
})
releasers = append(releasers, executor.MountStubsCleaner(ctx, details.rootfsPath, mounts, meta.RemoveMountStubsRecursive))
return resolvConf, hostsFile, releaseAll, nil
}
func (w *containerdExecutor) ensureCWD(_ context.Context, details *containerState, meta executor.Meta) error {
newp, err := fs.RootPath(details.rootfsPath, meta.Cwd)
if err != nil {
return errors.Wrapf(err, "working dir %s points to invalid target", newp)
}
uid, gid, _, err := oci.GetUser(details.rootfsPath, meta.User)
if err != nil {
return err
}
identity := idtools.Identity{
UID: int(uid),
GID: int(gid),
}
if _, err := os.Stat(newp); err != nil {
if err := idtools.MkdirAllAndChown(newp, 0755, identity); err != nil {
return errors.Wrapf(err, "failed to create working directory %s", newp)
}
}
return nil
}
func (w *containerdExecutor) createOCISpec(ctx context.Context, id, resolvConf, hostsFile string, namespace network.Namespace, mounts []executor.Mount, meta executor.Meta, details *containerState) (*specs.Spec, func(), error) {
var releasers []func()
releaseAll := func() {
for i := len(releasers) - 1; i >= 0; i-- {
releasers[i]()
}
}
uid, gid, sgids, err := oci.GetUser(details.rootfsPath, meta.User)
if err != nil {
releaseAll()
return nil, nil, err
}
opts := []containerdoci.SpecOpts{oci.WithUIDGID(uid, gid, sgids)}
if meta.ReadonlyRootFS {
opts = append(opts, containerdoci.WithRootFSReadonly())
}
processMode := oci.ProcessSandbox // FIXME(AkihiroSuda)
spec, cleanup, err := oci.GenerateSpec(ctx, meta, mounts, id, resolvConf, hostsFile, namespace, w.cgroupParent, processMode, nil, w.apparmorProfile, w.selinux, w.traceSocket, opts...)
if err != nil {
releaseAll()
return nil, nil, err
}
releasers = append(releasers, cleanup)
spec.Process.Terminal = meta.Tty
if w.rootless {
if err := rootlessspecconv.ToRootless(spec); err != nil {
releaseAll()
return nil, nil, err
}
}
return spec, releaseAll, nil
}
func (d *containerState) getTaskOpts() ([]containerd.NewTaskOpts, error) {
rootfs := containerd.WithRootFS([]mount.Mount{{
Source: d.rootfsPath,
Type: "bind",
Options: []string{"rbind"},
}})
if runtime.GOOS == "freebsd" {
rootfs = containerd.WithRootFS([]mount.Mount{{
Source: d.rootfsPath,
Type: "nullfs",
Options: []string{},
}})
}
return []containerd.NewTaskOpts{rootfs}, nil
}
func setArgs(spec *specs.Process, args []string) {
spec.Args = args
}
|
