| package daemon |
| |
| import ( |
| "fmt" |
| "os" |
| "strings" |
| |
| "github.com/docker/docker/engine" |
| "github.com/docker/docker/runconfig" |
| ) |
| |
| func (daemon *Daemon) ContainerStart(job *engine.Job) engine.Status { |
| if len(job.Args) < 1 { |
| return job.Errorf("Usage: %s container_id", job.Name) |
| } |
| var ( |
| name = job.Args[0] |
| container = daemon.Get(name) |
| ) |
| |
| if container == nil { |
| return job.Errorf("No such container: %s", name) |
| } |
| |
| if container.IsRunning() { |
| return job.Errorf("Container already started") |
| } |
| |
| // If no environment was set, then no hostconfig was passed. |
| // This is kept for backward compatibility - hostconfig should be passed when |
| // creating a container, not during start. |
| if len(job.Environ()) > 0 { |
| hostConfig := runconfig.ContainerHostConfigFromJob(job) |
| if err := daemon.setHostConfig(container, hostConfig); err != nil { |
| return job.Error(err) |
| } |
| } |
| if err := container.Start(); err != nil { |
| container.LogEvent("die") |
| return job.Errorf("Cannot start container %s: %s", name, err) |
| } |
| |
| return engine.StatusOK |
| } |
| |
| func (daemon *Daemon) setHostConfig(container *Container, hostConfig *runconfig.HostConfig) error { |
| if err := parseSecurityOpt(container, hostConfig); err != nil { |
| return err |
| } |
| // Validate the HostConfig binds. Make sure that: |
| // the source exists |
| for _, bind := range hostConfig.Binds { |
| splitBind := strings.Split(bind, ":") |
| source := splitBind[0] |
| |
| // ensure the source exists on the host |
| _, err := os.Stat(source) |
| if err != nil && os.IsNotExist(err) { |
| err = os.MkdirAll(source, 0755) |
| if err != nil { |
| return fmt.Errorf("Could not create local directory '%s' for bind mount: %s!", source, err.Error()) |
| } |
| } |
| } |
| // Register any links from the host config before starting the container |
| if err := daemon.RegisterLinks(container, hostConfig); err != nil { |
| return err |
| } |
| container.SetHostConfig(hostConfig) |
| container.ToDisk() |
| |
| return nil |
| } |