func RunCommandInContainer(client *docker.DockerClient, name string, command []string, environment []string) (int, error) { if len(command) == 0 { fmt.Println("No command specified") os.Exit(3) } container, err := client.InspectContainer(name) if err != nil { fmt.Printf("Unable to locate container named %v\n", name) os.Exit(3) } containerNsPID, err := client.ChildProcessForContainer(container) if err != nil { fmt.Println("Couldn't create child process for container") os.Exit(3) } containerEnv := environment if len(containerEnv) == 0 { containerEnv = container.Config.Env } return RunIn(name, containerNsPID, command, containerEnv) }
func isContainerAvailable(client *docker.DockerClient, id string) (bool, error) { container, err := client.InspectContainer(id) if err == docker.ErrNoSuchContainer { return false, nil } if err != nil { return true, err } if container.State.Running && container.State.Pid != 0 { return true, nil } return false, nil }
func InitPostStart(dockerSocket string, id containers.Identifier) error { var ( u *user.User container *dc.Container err error d *docker.DockerClient ) if u, err = user.Lookup(id.LoginFor()); err == nil { if err := ssh.GenerateAuthorizedKeysFor(u, true, false); err != nil { log.Print(err.Error()) } } else { log.Print(err.Error()) } if d, err = docker.GetConnection(dockerSocket); err != nil { return err } if file, err := os.Open(id.NetworkLinksPathFor()); err == nil { defer file.Close() const ContainerInterval = time.Second / 10 const ContainerWait = time.Second * 15 for i := 0; i < int(ContainerWait/ContainerInterval); i++ { if container, err = d.InspectContainer(id.ContainerFor()); err != nil { if err == docker.ErrNoSuchContainer { //log.Printf("Waiting for container to be available.") time.Sleep(ContainerInterval) continue } return err } if container.State.Running && container.State.Pid != 0 { break } else { //log.Printf("Waiting for container to report available.") time.Sleep(ContainerInterval) } } if container == nil { return fmt.Errorf("container %s was not visible through Docker before timeout", id.ContainerFor()) } pid, err := d.ChildProcessForContainer(container) if err != nil { return err } if pid <= 1 { return errors.New("child PID is not correct") } log.Printf("Updating network namespaces for %d", pid) if err := updateNamespaceNetworkLinks(pid, file); err != nil { return err } } return nil }