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package remote // import "github.com/docker/docker/libcontainerd/remote"
import (
"context"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/containerd/containerd"
"github.com/containerd/containerd/cio"
"github.com/containerd/containerd/containers"
libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
"github.com/docker/docker/pkg/idtools"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
const (
runtimeName = "io.containerd.runtime.v1.linux"
shimV2RuntimeName = "io.containerd.runc.v2"
)
func summaryFromInterface(i interface{}) (*libcontainerdtypes.Summary, error) {
return &libcontainerdtypes.Summary{}, nil
}
func (c *client) UpdateResources(ctx context.Context, containerID string, resources *libcontainerdtypes.Resources) error {
p, err := c.getProcess(ctx, containerID, libcontainerdtypes.InitProcessName)
if err != nil {
return err
}
// go doesn't like the alias in 1.8, this means this need to be
// platform specific
return p.(containerd.Task).Update(ctx, containerd.WithResources((*specs.LinuxResources)(resources)))
}
func hostIDFromMap(id uint32, mp []specs.LinuxIDMapping) int {
for _, m := range mp {
if id >= m.ContainerID && id <= m.ContainerID+m.Size-1 {
return int(m.HostID + id - m.ContainerID)
}
}
return 0
}
func getSpecUser(ociSpec *specs.Spec) (int, int) {
var (
uid int
gid int
)
for _, ns := range ociSpec.Linux.Namespaces {
if ns.Type == specs.UserNamespace {
uid = hostIDFromMap(0, ociSpec.Linux.UIDMappings)
gid = hostIDFromMap(0, ociSpec.Linux.GIDMappings)
break
}
}
return uid, gid
}
// WithBundle creates the bundle for the container
func WithBundle(bundleDir string, ociSpec *specs.Spec) containerd.NewContainerOpts {
return func(ctx context.Context, client *containerd.Client, c *containers.Container) error {
if c.Labels == nil {
c.Labels = make(map[string]string)
}
uid, gid := getSpecUser(ociSpec)
if uid == 0 && gid == 0 {
c.Labels[DockerContainerBundlePath] = bundleDir
return idtools.MkdirAllAndChownNew(bundleDir, 0755, idtools.Identity{UID: 0, GID: 0})
}
p := string(filepath.Separator)
components := strings.Split(bundleDir, string(filepath.Separator))
for _, d := range components[1:] {
p = filepath.Join(p, d)
fi, err := os.Stat(p)
if err != nil && !os.IsNotExist(err) {
return err
}
if os.IsNotExist(err) || fi.Mode()&1 == 0 {
p = fmt.Sprintf("%s.%d.%d", p, uid, gid)
if err := idtools.MkdirAndChown(p, 0700, idtools.Identity{UID: uid, GID: gid}); err != nil && !os.IsExist(err) {
return err
}
}
}
if c.Labels == nil {
c.Labels = make(map[string]string)
}
c.Labels[DockerContainerBundlePath] = p
return nil
}
}
func withLogLevel(_ logrus.Level) containerd.NewTaskOpts {
panic("Not implemented")
}
func newFIFOSet(bundleDir, processID string, withStdin, withTerminal bool) *cio.FIFOSet {
config := cio.Config{
Terminal: withTerminal,
Stdout: filepath.Join(bundleDir, processID+"-stdout"),
}
paths := []string{config.Stdout}
if withStdin {
config.Stdin = filepath.Join(bundleDir, processID+"-stdin")
paths = append(paths, config.Stdin)
}
if !withTerminal {
config.Stderr = filepath.Join(bundleDir, processID+"-stderr")
paths = append(paths, config.Stderr)
}
closer := func() error {
for _, path := range paths {
if err := os.RemoveAll(path); err != nil {
logrus.Warnf("libcontainerd: failed to remove fifo %v: %v", path, err)
}
}
return nil
}
return cio.NewFIFOSet(config, closer)
}
func (c *client) newDirectIO(ctx context.Context, fifos *cio.FIFOSet) (*cio.DirectIO, error) {
return cio.NewDirectIO(ctx, fifos)
}
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