111 lines
2.5 KiB
Go
111 lines
2.5 KiB
Go
package containerd
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import (
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"context"
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"encoding/json"
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"github.com/containerd/containerd/api/services/containers"
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"github.com/containerd/containerd/api/services/execution"
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"github.com/containerd/containerd/api/types/mount"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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)
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type Container interface {
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ID() string
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Delete(context.Context) error
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NewTask(context.Context, IOCreation) (Task, error)
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Spec() (*specs.Spec, error)
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Task() Task
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}
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func containerFromProto(client *Client, c containers.Container) *container {
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return &container{
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client: client,
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c: c,
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}
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}
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var _ = (Container)(&container{})
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type container struct {
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client *Client
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c containers.Container
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task *task
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}
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// ID returns the container's unique id
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func (c *container) ID() string {
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return c.c.ID
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}
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// Spec returns the current OCI specification for the container
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func (c *container) Spec() (*specs.Spec, error) {
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var s specs.Spec
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if err := json.Unmarshal(c.c.Spec.Value, &s); err != nil {
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return nil, err
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}
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return &s, nil
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}
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// Delete deletes an existing container
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// an error is returned if the container has running tasks
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func (c *container) Delete(ctx context.Context) (err error) {
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// TODO: should the client be the one removing resources attached
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// to the container at the moment before we have GC?
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if c.c.RootFS != "" {
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err = c.client.SnapshotService().Remove(ctx, c.c.RootFS)
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}
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if _, cerr := c.client.ContainerService().Delete(ctx, &containers.DeleteContainerRequest{
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ID: c.c.ID,
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}); err == nil {
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err = cerr
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}
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return err
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}
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func (c *container) Task() Task {
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return c.task
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}
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func (c *container) NewTask(ctx context.Context, ioCreate IOCreation) (Task, error) {
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i, err := ioCreate()
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if err != nil {
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return nil, err
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}
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request := &execution.CreateRequest{
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ContainerID: c.c.ID,
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Terminal: i.Terminal,
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Stdin: i.Stdin,
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Stdout: i.Stdout,
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Stderr: i.Stderr,
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}
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if c.c.RootFS != "" {
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// get the rootfs from the snapshotter and add it to the request
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mounts, err := c.client.SnapshotService().Mounts(ctx, c.c.RootFS)
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if err != nil {
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return nil, err
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}
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for _, m := range mounts {
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request.Rootfs = append(request.Rootfs, &mount.Mount{
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Type: m.Type,
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Source: m.Source,
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Options: m.Options,
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})
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}
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}
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response, err := c.client.TaskService().Create(ctx, request)
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if err != nil {
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return nil, err
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}
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t := &task{
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client: c.client,
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io: i,
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containerID: response.ContainerID,
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pid: response.Pid,
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}
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c.task = t
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return t, nil
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}
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