Golang description.Model类代码示例

func getUsedCharms(model description.Model) set.Strings {
	result := set.NewStrings()
	for _, service := range model.Services() {
		result.Add(service.CharmURL())
	}
	return result
}

func getUsedTools(model description.Model) []params.SerializedModelTools {
	// Iterate through the model for all tools, and make a map of them.
	usedVersions := make(map[version.Binary]bool)
	// It is most likely that the preconditions will limit the number of
	// tools versions in use, but that is not relied on here.
	for _, machine := range model.Machines() {
		addToolsVersionForMachine(machine, usedVersions)
	}

	for _, application := range model.Applications() {
		for _, unit := range application.Units() {
			tools := unit.Tools()
			usedVersions[tools.Version()] = true
		}
	}

	out := make([]params.SerializedModelTools, 0, len(usedVersions))
	for v := range usedVersions {
		out = append(out, params.SerializedModelTools{
			Version: v.String(),
			URI:     common.ToolsURL("", v),
		})
	}
	return out
}

func getUsedCharms(model description.Model) []string {
	result := set.NewStrings()
	for _, application := range model.Applications() {
		result.Add(application.CharmURL())
	}
	return result.Values()
}

func getUsedToolsVersions(model description.Model) map[version.Binary]bool {
	// Iterate through the model for all tools, and make a map of them.
	usedVersions := make(map[version.Binary]bool)
	// It is most likely that the preconditions will limit the number of
	// tools versions in use, but that is not depended on here.
	for _, machine := range model.Machines() {
		addToolsVersionForMachine(machine, usedVersions)
	}

	for _, service := range model.Services() {
		for _, unit := range service.Units() {
			tools := unit.Tools()
			usedVersions[tools.Version()] = true
		}
	}
	return usedVersions
}

func updateConfigFromProvider(model description.Model, controllerConfig *config.Config) error {
	newConfig, err := config.New(config.NoDefaults, model.Config())
	if err != nil {
		return errors.Trace(err)
	}

	provider, err := environs.New(newConfig)
	if err != nil {
		return errors.Trace(err)
	}

	updater, ok := provider.(environs.MigrationConfigUpdater)
	if !ok {
		return nil
	}

	model.UpdateConfig(updater.MigrationConfigUpdate(controllerConfig))
	return nil
}

// Import the database agnostic model representation into the database.
func (st *State) Import(model description.Model) (_ *Model, _ *State, err error) {
	logger := loggo.GetLogger("juju.state.import-model")
	logger.Debugf("import starting for model %s", model.Tag().Id())
	// At this stage, attempting to import a model with the same
	// UUID as an existing model will error.
	tag := model.Tag()
	_, err = st.GetModel(tag)
	if err == nil {
		// We have an existing matching model.
		return nil, nil, errors.AlreadyExistsf("model with UUID %s", tag.Id())
	} else if !errors.IsNotFound(err) {
		return nil, nil, errors.Trace(err)
	}

	// Create the model.
	cfg, err := config.New(config.NoDefaults, model.Config())
	if err != nil {
		return nil, nil, errors.Trace(err)
	}
	dbModel, newSt, err := st.NewModel(cfg, model.Owner())
	if err != nil {
		return nil, nil, errors.Trace(err)
	}
	logger.Debugf("model created %s/%s", dbModel.Owner().Canonical(), dbModel.Name())
	defer func() {
		if err != nil {
			newSt.Close()
		}
	}()

	// I would have loved to use import, but that is a reserved word.
	restore := importer{
		st:      newSt,
		dbModel: dbModel,
		model:   model,
		logger:  logger,
	}
	if err := restore.sequences(); err != nil {
		return nil, nil, errors.Annotate(err, "sequences")
	}
	// We need to import the sequences first as we may add blocks
	// in the modelExtras which will touch the block sequence.
	if err := restore.modelExtras(); err != nil {
		return nil, nil, errors.Annotate(err, "base model aspects")
	}
	if err := newSt.SetModelConstraints(restore.constraints(model.Constraints())); err != nil {
		return nil, nil, errors.Annotate(err, "model constraints")
	}

	if err := restore.modelUsers(); err != nil {
		return nil, nil, errors.Annotate(err, "modelUsers")
	}
	if err := restore.machines(); err != nil {
		return nil, nil, errors.Annotate(err, "machines")
	}
	if err := restore.services(); err != nil {
		return nil, nil, errors.Annotate(err, "services")
	}
	if err := restore.relations(); err != nil {
		return nil, nil, errors.Annotate(err, "relations")
	}

	// NOTE: at the end of the import make sure that the mode of the model
	// is set to "imported" not "active" (or whatever we call it). This way
	// we don't start model workers for it before the migration process
	// is complete.

	// Update the sequences to match that the source.

	logger.Debugf("import success")
	return dbModel, newSt, nil
}

// Import the database agnostic model representation into the database.
func (st *State) Import(model description.Model) (_ *Model, _ *State, err error) {
	logger := loggo.GetLogger("juju.state.import-model")
	logger.Debugf("import starting for model %s", model.Tag().Id())
	// At this stage, attempting to import a model with the same
	// UUID as an existing model will error.
	tag := model.Tag()
	_, err = st.GetModel(tag)
	if err == nil {
		// We have an existing matching model.
		return nil, nil, errors.AlreadyExistsf("model with UUID %s", tag.Id())
	} else if !errors.IsNotFound(err) {
		return nil, nil, errors.Trace(err)
	}

	// Create the model.
	cfg, err := config.New(config.NoDefaults, model.Config())
	if err != nil {
		return nil, nil, errors.Trace(err)
	}
	dbModel, newSt, err := st.NewModel(ModelArgs{
		CloudName:     model.Cloud(),
		CloudRegion:   model.CloudRegion(),
		Config:        cfg,
		Owner:         model.Owner(),
		MigrationMode: MigrationModeImporting,

		// NOTE(axw) we create the model without any storage
		// pools. We'll need to import the storage pools from
		// the model description before adding any volumes,
		// filesystems or storage instances.
		StorageProviderRegistry: storage.StaticProviderRegistry{},
	})
	if err != nil {
		return nil, nil, errors.Trace(err)
	}
	logger.Debugf("model created %s/%s", dbModel.Owner().Canonical(), dbModel.Name())
	defer func() {
		if err != nil {
			newSt.Close()
		}
	}()

	// I would have loved to use import, but that is a reserved word.
	restore := importer{
		st:      newSt,
		dbModel: dbModel,
		model:   model,
		logger:  logger,
	}
	if err := restore.sequences(); err != nil {
		return nil, nil, errors.Annotate(err, "sequences")
	}
	// We need to import the sequences first as we may add blocks
	// in the modelExtras which will touch the block sequence.
	if err := restore.modelExtras(); err != nil {
		return nil, nil, errors.Annotate(err, "base model aspects")
	}
	if err := newSt.SetModelConstraints(restore.constraints(model.Constraints())); err != nil {
		return nil, nil, errors.Annotate(err, "model constraints")
	}
	if err := restore.sshHostKeys(); err != nil {
		return nil, nil, errors.Annotate(err, "sshHostKeys")
	}
	if err := restore.cloudimagemetadata(); err != nil {
		return nil, nil, errors.Annotate(err, "cloudimagemetadata")
	}
	if err := restore.actions(); err != nil {
		return nil, nil, errors.Annotate(err, "actions")
	}

	if err := restore.modelUsers(); err != nil {
		return nil, nil, errors.Annotate(err, "modelUsers")
	}
	if err := restore.machines(); err != nil {
		return nil, nil, errors.Annotate(err, "machines")
	}
	if err := restore.applications(); err != nil {
		return nil, nil, errors.Annotate(err, "applications")
	}
	if err := restore.relations(); err != nil {
		return nil, nil, errors.Annotate(err, "relations")
	}
	if err := restore.spaces(); err != nil {
		return nil, nil, errors.Annotate(err, "spaces")
	}
	if err := restore.linklayerdevices(); err != nil {
		return nil, nil, errors.Annotate(err, "linklayerdevices")
	}
	if err := restore.subnets(); err != nil {
		return nil, nil, errors.Annotate(err, "subnets")
	}
	if err := restore.ipaddresses(); err != nil {
		return nil, nil, errors.Annotate(err, "ipaddresses")
	}

	if err := restore.storage(); err != nil {
		return nil, nil, errors.Annotate(err, "storage")
	}

//.........这里部分代码省略.........