Golang State.IsController方法代碼示例

// getSecretKeyLoginResponsePayload returns the information required by the
// client to login to the controller securely.
func (h *registerUserHandler) getSecretKeyLoginResponsePayload(
	st *state.State, userTag names.UserTag,
) (*params.SecretKeyLoginResponsePayload, error) {
	if !st.IsController() {
		return nil, errors.New("state is not for a controller")
	}
	payload := params.SecretKeyLoginResponsePayload{
		CACert:         st.CACert(),
		ControllerUUID: st.ControllerUUID(),
	}
	return &payload, 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{}, 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
}

// getSecretKeyLoginResponsePayload returns the information required by the
// client to login to the controller securely.
func (h *registerUserHandler) getSecretKeyLoginResponsePayload(
	st *state.State, userTag names.UserTag,
) (*params.SecretKeyLoginResponsePayload, error) {
	if !st.IsController() {
		return nil, errors.New("state is not for a controller")
	}
	mac, err := h.createLocalLoginMacaroon(userTag)
	if err != nil {
		return nil, errors.Trace(err)
	}
	payload := params.SecretKeyLoginResponsePayload{
		CACert:         st.CACert(),
		ControllerUUID: st.ModelUUID(),
		Macaroon:       mac,
	}
	return &payload, nil
}

// NewAPI creates a new instance of the Backups API facade.
func NewAPI(st *state.State, resources *common.Resources, authorizer common.Authorizer) (*API, error) {
	if !authorizer.AuthClient() {
		return nil, errors.Trace(common.ErrPerm)
	}

	// For now, backup operations are only permitted on the controller environment.
	if !st.IsController() {
		return nil, errors.New("backups are not supported for hosted models")
	}

	// Get the backup paths.
	dataDir, err := extractResourceValue(resources, "dataDir")
	if err != nil {
		return nil, errors.Trace(err)
	}
	logsDir, err := extractResourceValue(resources, "logDir")
	if err != nil {
		return nil, errors.Trace(err)
	}
	paths := backups.Paths{
		DataDir: dataDir,
		LogsDir: logsDir,
	}

	// Build the API.
	machineID, err := extractResourceValue(resources, "machineID")
	if err != nil {
		return nil, errors.Trace(err)
	}
	b := API{
		st:        st,
		paths:     &paths,
		machineID: machineID,
	}
	return &b, 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
}