Golang Authorizer.AuthMachineAgent方法代碼示例

func newUndertakerAPI(st State, resources *common.Resources, authorizer common.Authorizer) (*UndertakerAPI, error) {
	if !authorizer.AuthMachineAgent() || !authorizer.AuthModelManager() {
		return nil, common.ErrPerm
	}
	model, err := st.Model()
	if err != nil {
		return nil, errors.Trace(err)
	}
	getCanModifyModel := func() (common.AuthFunc, error) {
		return func(tag names.Tag) bool {
			if st.IsController() {
				return true
			}
			// Only the agent's model can be modified.
			modelTag, ok := tag.(names.ModelTag)
			if !ok {
				return false
			}
			return modelTag.Id() == model.UUID()
		}, nil
	}
	return &UndertakerAPI{
		st:           st,
		resources:    resources,
		StatusSetter: common.NewStatusSetter(st, getCanModifyModel),
	}, nil
}

// NewRebootAPI creates a new server-side RebootAPI facade.
func NewRebootAPI(st *state.State, resources *common.Resources, auth common.Authorizer) (*RebootAPI, error) {
	if !auth.AuthMachineAgent() {
		return nil, common.ErrPerm
	}

	tag, ok := auth.GetAuthTag().(names.MachineTag)
	if !ok {
		return nil, errors.Errorf("Expected names.MachineTag, got %T", auth.GetAuthTag())
	}
	machine, err := st.Machine(tag.Id())
	if err != nil {
		return nil, errors.Trace(err)
	}

	canAccess := func() (common.AuthFunc, error) {
		return auth.AuthOwner, nil
	}

	return &RebootAPI{
		RebootActionGetter: common.NewRebootActionGetter(st, canAccess),
		RebootRequester:    common.NewRebootRequester(st, canAccess),
		RebootFlagClearer:  common.NewRebootFlagClearer(st, canAccess),
		st:                 st,
		machine:            machine,
		resources:          resources,
		auth:               auth,
	}, nil
}

func newUndertakerAPI(st State, resources *common.Resources, authorizer common.Authorizer) (*UndertakerAPI, error) {
	if !authorizer.AuthMachineAgent() || !authorizer.AuthModelManager() {
		return nil, common.ErrPerm
	}
	return &UndertakerAPI{
		st:        st,
		resources: resources,
	}, nil
}

// NewProvisionerAPI creates a new server-side ProvisionerAPI facade.
func NewProvisionerAPI(st *state.State, resources *common.Resources, authorizer common.Authorizer) (*ProvisionerAPI, error) {
	if !authorizer.AuthMachineAgent() && !authorizer.AuthEnvironManager() {
		return nil, common.ErrPerm
	}
	getAuthFunc := func() (common.AuthFunc, error) {
		isEnvironManager := authorizer.AuthEnvironManager()
		isMachineAgent := authorizer.AuthMachineAgent()
		authEntityTag := authorizer.GetAuthTag()

		return func(tag names.Tag) bool {
			if isMachineAgent && tag == authEntityTag {
				// A machine agent can always access its own machine.
				return true
			}
			switch tag := tag.(type) {
			case names.MachineTag:
				parentId := state.ParentId(tag.Id())
				if parentId == "" {
					// All top-level machines are accessible by the
					// environment manager.
					return isEnvironManager
				}
				// All containers with the authenticated machine as a
				// parent are accessible by it.
				// TODO(dfc) sometimes authEntity tag is nil, which is fine because nil is
				// only equal to nil, but it suggests someone is passing an authorizer
				// with a nil tag.
				return isMachineAgent && names.NewMachineTag(parentId) == authEntityTag
			default:
				return false
			}
		}, nil
	}
	env, err := st.Environment()
	if err != nil {
		return nil, err
	}
	urlGetter := common.NewToolsURLGetter(env.UUID(), st)
	return &ProvisionerAPI{
		Remover:                common.NewRemover(st, false, getAuthFunc),
		StatusSetter:           common.NewStatusSetter(st, getAuthFunc),
		StatusGetter:           common.NewStatusGetter(st, getAuthFunc),
		DeadEnsurer:            common.NewDeadEnsurer(st, getAuthFunc),
		PasswordChanger:        common.NewPasswordChanger(st, getAuthFunc),
		LifeGetter:             common.NewLifeGetter(st, getAuthFunc),
		StateAddresser:         common.NewStateAddresser(st),
		APIAddresser:           common.NewAPIAddresser(st, resources),
		EnvironWatcher:         common.NewEnvironWatcher(st, resources, authorizer),
		EnvironMachinesWatcher: common.NewEnvironMachinesWatcher(st, resources, authorizer),
		InstanceIdGetter:       common.NewInstanceIdGetter(st, getAuthFunc),
		ToolsFinder:            common.NewToolsFinder(st, st, urlGetter),
		st:                     st,
		resources:              resources,
		authorizer:             authorizer,
		getAuthFunc:            getAuthFunc,
	}, nil
}

// New creates a Facade backed by backend and resources. If auth
// doesn't identity the client as a machine agent or a unit agent,
// it will return common.ErrPerm.
func New(backend Backend, resources *common.Resources, auth common.Authorizer) (*Facade, error) {
	if !auth.AuthMachineAgent() && !auth.AuthUnitAgent() {
		return nil, common.ErrPerm
	}
	return &Facade{
		backend:   backend,
		resources: resources,
	}, nil
}

// NewLoggerAPI creates a new server-side logger API end point.
func NewLoggerAPI(
	st *state.State,
	resources *common.Resources,
	authorizer common.Authorizer,
) (*LoggerAPI, error) {
	if !authorizer.AuthMachineAgent() && !authorizer.AuthUnitAgent() {
		return nil, common.ErrPerm
	}
	return &LoggerAPI{state: st, resources: resources, authorizer: authorizer}, nil
}

// NewAPIWithBacking creates a new server-side API facade with the given Backing.
func NewAPIWithBacking(st Backend, resources *common.Resources, authorizer common.Authorizer) (*ProxyUpdaterAPI, error) {
	if !(authorizer.AuthMachineAgent() || authorizer.AuthUnitAgent()) {
		return &ProxyUpdaterAPI{}, common.ErrPerm
	}
	return &ProxyUpdaterAPI{
		backend:    st,
		resources:  resources,
		authorizer: authorizer,
	}, nil
}

// NewCharmRevisionUpdaterAPI creates a new server-side charmrevisionupdater API end point.
func NewCharmRevisionUpdaterAPI(
	st *state.State,
	resources *common.Resources,
	authorizer common.Authorizer,
) (*CharmRevisionUpdaterAPI, error) {
	if !authorizer.AuthMachineAgent() && !authorizer.AuthEnvironManager() {
		return nil, common.ErrPerm
	}
	return &CharmRevisionUpdaterAPI{
		state: st, resources: resources, authorizer: authorizer}, nil
}

// NewRsyslogAPI creates a new instance of the Rsyslog API.
func NewRsyslogAPI(st *state.State, resources *common.Resources, authorizer common.Authorizer) (*RsyslogAPI, error) {
	if !authorizer.AuthMachineAgent() && !authorizer.AuthUnitAgent() {
		return nil, common.ErrPerm
	}
	return &RsyslogAPI{
		EnvironWatcher: common.NewEnvironWatcher(st, resources, authorizer),
		st:             st,
		authorizer:     authorizer,
		resources:      resources,
		canModify:      authorizer.AuthEnvironManager(),
		StateAddresser: common.NewStateAddresser(st),
	}, nil
}

// NewAPI returns an object implementing an agent API
// with the given authorizer representing the currently logged in client.
func NewAPI(st *state.State, resources *common.Resources, auth common.Authorizer) (*API, error) {
	// Agents are defined to be any user that's not a client user.
	if !auth.AuthMachineAgent() && !auth.AuthUnitAgent() {
		return nil, common.ErrPerm
	}
	getCanChange := func() (common.AuthFunc, error) {
		return auth.AuthOwner, nil
	}
	return &API{
		PasswordChanger: common.NewPasswordChanger(st, getCanChange),
		st:              st,
		auth:            auth,
	}, nil
}

// NewAPI creates a new API server endpoint for the model migration
// master worker.
func NewAPI(
	st *state.State,
	resources *common.Resources,
	authorizer common.Authorizer,
) (*API, error) {
	if !(authorizer.AuthMachineAgent() || authorizer.AuthUnitAgent()) {
		return nil, common.ErrPerm
	}
	return &API{
		backend:    getBackend(st),
		authorizer: authorizer,
		resources:  resources,
	}, nil
}

// NewMetricsAdderAPI creates a new API endpoint for adding metrics to state.
func NewMetricsAdderAPI(
	st *state.State,
	resources *common.Resources,
	authorizer common.Authorizer,
) (*MetricsAdderAPI, error) {
	// TODO(cmars): remove unit agent auth, once worker/metrics/sender manifold
	// can be righteously relocated to machine agent.
	if !authorizer.AuthMachineAgent() && !authorizer.AuthUnitAgent() {
		return nil, common.ErrPerm
	}
	return &MetricsAdderAPI{
		state: st,
	}, nil
}

// NewFacade creates a new server-side machineactions API end point.
func NewFacade(
	backend Backend,
	resources *common.Resources,
	authorizer common.Authorizer,
) (*Facade, error) {
	if !authorizer.AuthMachineAgent() {
		return nil, common.ErrPerm
	}
	return &Facade{
		backend:       backend,
		resources:     resources,
		accessMachine: authorizer.AuthOwner,
	}, nil
}

// NewKeyUpdaterAPI creates a new server-side keyupdater API end point.
func NewKeyUpdaterAPI(
	st *state.State,
	resources *common.Resources,
	authorizer common.Authorizer,
) (*KeyUpdaterAPI, error) {
	// Only machine agents have access to the keyupdater service.
	if !authorizer.AuthMachineAgent() {
		return nil, common.ErrPerm
	}
	// No-one else except the machine itself can only read a machine's own credentials.
	getCanRead := func() (common.AuthFunc, error) {
		return authorizer.AuthOwner, nil
	}
	return &KeyUpdaterAPI{state: st, resources: resources, authorizer: authorizer, getCanRead: getCanRead}, nil
}

// NewNetworkerAPI creates a new server-side Networker API facade.
func NewNetworkerAPI(
	st *state.State,
	resources *common.Resources,
	authorizer common.Authorizer,
) (*NetworkerAPI, error) {
	if !authorizer.AuthMachineAgent() {
		return nil, common.ErrPerm
	}
	getAuthFunc := func() (common.AuthFunc, error) {
		authEntityTag := authorizer.GetAuthTag()

		return func(tag names.Tag) bool {
			if tag == authEntityTag {
				// A machine agent can always access its own machine.
				return true
			}
			if _, ok := tag.(names.MachineTag); !ok {
				// Only machine tags are allowed.
				return false
			}
			id := tag.Id()
			for parentId := state.ParentId(id); parentId != ""; parentId = state.ParentId(parentId) {
				// Until a top-level machine is reached.

				// TODO (thumper): remove the names.Tag conversion when gccgo
				// implements concrete-type-to-interface comparison correctly.
				if names.Tag(names.NewMachineTag(parentId)) == authEntityTag {
					// All containers with the authenticated machine as a
					// parent are accessible by it.
					return true
				}
			}
			// Not found authorized machine agent among ancestors of the current one.
			return false
		}, nil
	}

	return &NetworkerAPI{
		st:          st,
		resources:   resources,
		authorizer:  authorizer,
		getAuthFunc: getAuthFunc,
	}, nil
}