Golang State.ControllerInfo方法代码示例

// EnableHASingle applies a single ControllersServersSpec specification to the current environment.
// Exported so it can be called by the legacy client API in the client package.
func EnableHASingle(st *state.State, spec params.ControllersSpec) (params.ControllersChanges, error) {
	if !st.IsController() {
		return params.ControllersChanges{}, errors.New("unsupported with hosted models")
	}
	// Check if changes are allowed and the command may proceed.
	blockChecker := common.NewBlockChecker(st)
	if err := blockChecker.ChangeAllowed(); err != nil {
		return params.ControllersChanges{}, errors.Trace(err)
	}
	// Validate the environment tag if present.
	if spec.ModelTag != "" {
		tag, err := names.ParseModelTag(spec.ModelTag)
		if err != nil {
			return params.ControllersChanges{}, errors.Errorf("invalid model tag: %v", err)
		}
		if _, err := st.FindEntity(tag); err != nil {
			return params.ControllersChanges{}, err
		}
	}

	series := spec.Series
	if series == "" {
		ssi, err := st.ControllerInfo()
		if err != nil {
			return params.ControllersChanges{}, err
		}

		// We should always have at least one voting machine
		// If we *really* wanted we could just pick whatever series is
		// in the majority, but really, if we always copy the value of
		// the first one, then they'll stay in sync.
		if len(ssi.VotingMachineIds) == 0 {
			// Better than a panic()?
			return params.ControllersChanges{}, fmt.Errorf("internal error, failed to find any voting machines")
		}
		templateMachine, err := st.Machine(ssi.VotingMachineIds[0])
		if err != nil {
			return params.ControllersChanges{}, err
		}
		series = templateMachine.Series()
	}
	changes, err := st.EnableHA(spec.NumControllers, spec.Constraints, series, spec.Placement)
	if err != nil {
		return params.ControllersChanges{}, err
	}
	return controllersChanges(changes), nil
}

// environManagerInstances returns all environ manager instances.
func environManagerInstances(st *state.State) ([]instance.Id, error) {
	info, err := st.ControllerInfo()
	if err != nil {
		return nil, err
	}
	instances := make([]instance.Id, 0, len(info.MachineIds))
	for _, id := range info.MachineIds {
		machine, err := st.Machine(id)
		if err != nil {
			return nil, err
		}
		instanceId, err := machine.InstanceId()
		if err == nil {
			instances = append(instances, instanceId)
		} else if !errors.IsNotProvisioned(err) {
			return nil, err
		}
	}
	return instances, nil
}

// EnableHASingle applies a single ControllersServersSpec specification to the current environment.
// Exported so it can be called by the legacy client API in the client package.
func EnableHASingle(st *state.State, spec params.ControllersSpec) (params.ControllersChanges, error) {
	if !st.IsController() {
		return params.ControllersChanges{}, errors.New("unsupported with hosted models")
	}
	// Check if changes are allowed and the command may proceed.
	blockChecker := common.NewBlockChecker(st)
	if err := blockChecker.ChangeAllowed(); err != nil {
		return params.ControllersChanges{}, errors.Trace(err)
	}
	// Validate the environment tag if present.
	if spec.ModelTag != "" {
		tag, err := names.ParseModelTag(spec.ModelTag)
		if err != nil {
			return params.ControllersChanges{}, errors.Errorf("invalid model tag: %v", err)
		}
		if _, err := st.FindEntity(tag); err != nil {
			return params.ControllersChanges{}, err
		}
	}

	series := spec.Series
	if series == "" {
		ssi, err := st.ControllerInfo()
		if err != nil {
			return params.ControllersChanges{}, err
		}

		// We should always have at least one voting machine
		// If we *really* wanted we could just pick whatever series is
		// in the majority, but really, if we always copy the value of
		// the first one, then they'll stay in sync.
		if len(ssi.VotingMachineIds) == 0 {
			// Better than a panic()?
			return params.ControllersChanges{}, errors.Errorf("internal error, failed to find any voting machines")
		}
		templateMachine, err := st.Machine(ssi.VotingMachineIds[0])
		if err != nil {
			return params.ControllersChanges{}, err
		}
		series = templateMachine.Series()
	}
	if constraints.IsEmpty(&spec.Constraints) {
		// No constraints specified, so we'll use the constraints off
		// a running controller.
		controllerInfo, err := st.ControllerInfo()
		if err != nil {
			return params.ControllersChanges{}, err
		}
		// We'll sort the controller ids to find the smallest.
		// This will typically give the initial bootstrap machine.
		var controllerIds []int
		for _, id := range controllerInfo.MachineIds {
			idNum, err := strconv.Atoi(id)
			if err != nil {
				logger.Warningf("ignoring non numeric controller id %v", id)
				continue
			}
			controllerIds = append(controllerIds, idNum)
		}
		if len(controllerIds) == 0 {
			errors.Errorf("internal error, failed to find any controllers")
		}
		sort.Ints(controllerIds)

		// Load the controller machine and get its constraints.
		controllerId := controllerIds[0]
		controller, err := st.Machine(strconv.Itoa(controllerId))
		if err != nil {
			return params.ControllersChanges{}, errors.Annotatef(err, "reading controller id %v", controllerId)
		}
		spec.Constraints, err = controller.Constraints()
		if err != nil {
			return params.ControllersChanges{}, errors.Annotatef(err, "reading constraints for controller id %v", controllerId)
		}
	}

	changes, err := st.EnableHA(spec.NumControllers, spec.Constraints, series, spec.Placement)
	if err != nil {
		return params.ControllersChanges{}, err
	}
	return controllersChanges(changes), nil
}