示例#1
0
文件: api.go 项目: dholbach/snappy
// changeInterfaces controls the interfaces system.
// Plugs can be connected to and disconnected from slots.
// When enableInternalInterfaceActions is true plugs and slots can also be
// explicitly added and removed.
func changeInterfaces(c *Command, r *http.Request) Response {
	var a interfaceAction
	decoder := json.NewDecoder(r.Body)
	if err := decoder.Decode(&a); err != nil {
		return BadRequest("cannot decode request body into an interface action: %v", err)
	}
	if a.Action == "" {
		return BadRequest("interface action not specified")
	}
	if !c.d.enableInternalInterfaceActions && a.Action != "connect" && a.Action != "disconnect" {
		return BadRequest("internal interface actions are disabled")
	}
	if len(a.Plugs) > 1 || len(a.Slots) > 1 {
		return NotImplemented("many-to-many operations are not implemented")
	}
	if a.Action != "connect" && a.Action != "disconnect" {
		return BadRequest("unsupported interface action: %q", a.Action)
	}
	if len(a.Plugs) == 0 || len(a.Slots) == 0 {
		return BadRequest("at least one plug and slot is required")
	}

	var change *state.Change
	var taskset *state.TaskSet
	var err error

	state := c.d.overlord.State()
	state.Lock()
	defer state.Unlock()

	switch a.Action {
	case "connect":
		summary := fmt.Sprintf("Connect %s:%s to %s:%s", a.Plugs[0].Snap, a.Plugs[0].Name, a.Slots[0].Snap, a.Slots[0].Name)
		change = state.NewChange("connect-snap", summary)
		taskset, err = ifacestate.Connect(state, a.Plugs[0].Snap, a.Plugs[0].Name, a.Slots[0].Snap, a.Slots[0].Name)
	case "disconnect":
		summary := fmt.Sprintf("Disconnect %s:%s from %s:%s", a.Plugs[0].Snap, a.Plugs[0].Name, a.Slots[0].Snap, a.Slots[0].Name)
		change = state.NewChange("disconnect-snap", summary)
		taskset, err = ifacestate.Disconnect(state, a.Plugs[0].Snap, a.Plugs[0].Name, a.Slots[0].Snap, a.Slots[0].Name)
	}

	if err == nil {
		change.AddAll(taskset)
	}

	if err != nil {
		return BadRequest("%v", err)
	}

	state.EnsureBefore(0)

	return AsyncResponse(nil, &Meta{Change: change.ID()})
}
示例#2
0
文件: api.go 项目: dholbach/snappy
func ensureUbuntuCore(chg *state.Change, userID int) error {
	var ss snapstate.SnapState

	ubuntuCore := "ubuntu-core"
	err := snapstateGet(chg.State(), ubuntuCore, &ss)
	if err != state.ErrNoState {
		return err
	}

	// FIXME: workaround because we are not fully state based yet
	installed, err := (&snappy.Overlord{}).Installed()
	snaps := snappy.FindSnapsByName(ubuntuCore, installed)
	if len(snaps) > 0 {
		return nil
	}

	return installSnap(chg, ubuntuCore, "stable", userID, 0)
}
示例#3
0
文件: api.go 项目: dholbach/snappy
func waitChange(chg *state.Change) error {
	select {
	case <-chg.Ready():
	}
	// TODO case <-daemon.Dying():
	st := chg.State()
	st.Lock()
	defer st.Unlock()
	return chg.Err()
}
示例#4
0
文件: api.go 项目: dholbach/snappy
func installSnap(chg *state.Change, name, channel string, userID int, flags snappy.InstallFlags) error {
	st := chg.State()
	ts, err := snapstateInstall(st, name, channel, userID, flags)
	if err != nil {
		return err
	}

	// ensure that each of our task runs after the existing tasks
	chgts := state.NewTaskSet(chg.Tasks()...)
	for _, t := range ts.Tasks() {
		t.WaitAll(chgts)
	}
	chg.AddAll(ts)

	return nil
}
示例#5
0
func ensureChange(c *C, r *state.TaskRunner, sb *stateBackend, chg *state.Change) {
	for i := 0; i < 10; i++ {
		sb.ensureBefore = time.Hour
		r.Ensure()
		r.Wait()
		chg.State().Lock()
		s := chg.Status()
		chg.State().Unlock()
		if s.Ready() {
			return
		}
		if sb.ensureBefore > 0 {
			break
		}
	}
	var statuses []string
	chg.State().Lock()
	for _, t := range chg.Tasks() {
		statuses = append(statuses, t.Summary()+":"+t.Status().String())
	}
	chg.State().Unlock()
	c.Fatalf("Change didn't reach final state without blocking: %s", strings.Join(statuses, " "))
}
示例#6
0
文件: api.go 项目: dholbach/snappy
func change2changeInfo(chg *state.Change) *changeInfo {
	status := chg.Status()
	chgInfo := &changeInfo{
		ID:      chg.ID(),
		Kind:    chg.Kind(),
		Summary: chg.Summary(),
		Status:  status.String(),
		Ready:   status.Ready(),

		SpawnTime: chg.SpawnTime(),
	}
	readyTime := chg.ReadyTime()
	if !readyTime.IsZero() {
		chgInfo.ReadyTime = &readyTime
	}
	if err := chg.Err(); err != nil {
		chgInfo.Err = err.Error()
	}

	tasks := chg.Tasks()
	taskInfos := make([]*taskInfo, len(tasks))
	for j, t := range tasks {
		done, total := t.Progress()
		taskInfo := &taskInfo{
			ID:      t.ID(),
			Kind:    t.Kind(),
			Summary: t.Summary(),
			Status:  t.Status().String(),
			Log:     t.Log(),
			Progress: taskInfoProgress{
				Done:  done,
				Total: total,
			},
			SpawnTime: t.SpawnTime(),
		}
		readyTime := t.ReadyTime()
		if !readyTime.IsZero() {
			taskInfo.ReadyTime = &readyTime
		}
		taskInfos[j] = taskInfo
	}
	chgInfo.Tasks = taskInfos

	return chgInfo
}