func setupBaseImage() {
eng, err := engine.New(unitTestStoreBase)
if err != nil {
log.Fatalf("Can't initialize engine at %s: %s", unitTestStoreBase, err)
}
job := eng.Job("initserver")
job.Setenv("Root", unitTestStoreBase)
job.SetenvBool("Autorestart", false)
job.Setenv("BridgeIface", unitTestNetworkBridge)
if err := job.Run(); err != nil {
log.Fatalf("Unable to create a runtime for tests: %s", err)
}
job = eng.Job("inspect", unitTestImageName, "image")
img, _ := job.Stdout.AddEnv()
// If the unit test is not found, try to download it.
if err := job.Run(); err != nil || img.Get("id") != unitTestImageID {
// Retrieve the Image
job = eng.Job("pull", unitTestImageName)
job.Stdout.Add(utils.NopWriteCloser(os.Stdout))
if err := job.Run(); err != nil {
log.Fatalf("Unable to pull the test image: %s", err)
}
}
}
// Job creates a new job which can later be executed.
// This function mimics `Command` from the standard os/exec package.
func (eng *Engine) Job(name string, args ...string) *Job {
job := &Job{
Eng: eng,
Name: name,
Args: args,
Stdin: NewInput(),
Stdout: NewOutput(),
Stderr: NewOutput(),
env: &Env{},
}
job.Stderr.Add(utils.NopWriteCloser(eng.Stderr))
handler, exists := eng.handlers[name]
if exists {
job.handler = handler
}
return job
}
// Register makes a container object usable by the runtime as <container.ID>
func (runtime *Runtime) Register(container *Container) error {
if container.runtime != nil || runtime.Exists(container.ID) {
return fmt.Errorf("Container is already loaded")
}
if err := validateID(container.ID); err != nil {
return err
}
if err := runtime.ensureName(container); err != nil {
return err
}
// Get the root filesystem from the driver
basefs, err := runtime.driver.Get(container.ID)
if err != nil {
return fmt.Errorf("Error getting container filesystem %s from driver %s: %s", container.ID, runtime.driver, err)
}
defer runtime.driver.Put(container.ID)
container.basefs = basefs
container.runtime = runtime
// Attach to stdout and stderr
container.stderr = utils.NewWriteBroadcaster()
container.stdout = utils.NewWriteBroadcaster()
// Attach to stdin
if container.Config.OpenStdin {
container.stdin, container.stdinPipe = io.Pipe()
} else {
container.stdinPipe = utils.NopWriteCloser(ioutil.Discard) // Silently drop stdin
}
// done
runtime.containers.PushBack(container)
runtime.idIndex.Add(container.ID)
// FIXME: if the container is supposed to be running but is not, auto restart it?
// if so, then we need to restart monitor and init a new lock
// If the container is supposed to be running, make sure of it
if container.State.IsRunning() {
info := runtime.execDriver.Info(container.ID)
if !info.IsRunning() {
utils.Debugf("Container %s was supposed to be running but is not.", container.ID)
if runtime.config.AutoRestart {
utils.Debugf("Restarting")
container.State.SetGhost(false)
container.State.SetStopped(0)
if err := container.Start(); err != nil {
return err
}
} else {
utils.Debugf("Marking as stopped")
container.State.SetStopped(-127)
if err := container.ToDisk(); err != nil {
return err
}
}
} else {
utils.Debugf("Reconnecting to container %v", container.ID)
if err := container.allocateNetwork(); err != nil {
return err
}
container.waitLock = make(chan struct{})
go container.monitor(nil)
}
} else {
// When the container is not running, we still initialize the waitLock
// chan and close it. Receiving on nil chan blocks whereas receiving on a
// closed chan does not. In this case we do not want to block.
container.waitLock = make(chan struct{})
close(container.waitLock)
}
return nil
}