Golang Environ.Name方法代码示例

func assertEnvironDestroyed(c *gc.C, env environs.Environ, store configstore.Storage) {
	_, err := store.ReadInfo(env.Name())
	c.Assert(err, jc.Satisfies, errors.IsNotFound)

	_, err = env.Instances([]instance.Id{"invalid"})
	c.Assert(err, gc.ErrorMatches, "environment has been destroyed")
}

// validateUploadAllowed returns an error if an attempt to upload tools should
// not be allowed.
func validateUploadAllowed(env environs.Environ, toolsArch *string, forceVersion bool) error {
	if !forceVersion {
		// First, check that there isn't already an agent version specified.
		if _, hasAgentVersion := env.Config().AgentVersion(); hasAgentVersion {
			return fmt.Errorf(noToolsNoUploadMessage)
		}
	}
	// Now check that the architecture for which we are setting up an
	// environment matches that from which we are bootstrapping.
	hostArch := arch.HostArch()
	// We can't build tools for a different architecture if one is specified.
	if toolsArch != nil && *toolsArch != hostArch {
		return fmt.Errorf("cannot build tools for %q using a machine running on %q", *toolsArch, hostArch)
	}
	// If no architecture is specified, ensure the target provider supports instances matching our architecture.
	supportedArchitectures, err := env.SupportedArchitectures()
	if err != nil {
		return fmt.Errorf(
			"no packaged tools available and cannot determine environment's supported architectures: %v", err)
	}
	archSupported := false
	for _, arch := range supportedArchitectures {
		if hostArch == arch {
			archSupported = true
			break
		}
	}
	if !archSupported {
		envType := env.Config().Type()
		return fmt.Errorf(
			"environment %q of type %s does not support instances running on %q", env.Name(), envType, hostArch)
	}
	return nil
}

// Bootstrap bootstraps the given environment. The supplied constraints are
// used to provision the instance, and are also set within the bootstrapped
// environment.
func Bootstrap(ctx environs.BootstrapContext, environ environs.Environ, args environs.BootstrapParams) error {
	cfg := environ.Config()
	if secret := cfg.AdminSecret(); secret == "" {
		return fmt.Errorf("environment configuration has no admin-secret")
	}
	if authKeys := ssh.SplitAuthorisedKeys(cfg.AuthorizedKeys()); len(authKeys) == 0 {
		// Apparently this can never happen, so it's not tested. But, one day,
		// Config will act differently (it's pretty crazy that, AFAICT, the
		// authorized-keys are optional config settings... but it's impossible
		// to actually *create* a config without them)... and when it does,
		// we'll be here to catch this problem early.
		return fmt.Errorf("environment configuration has no authorized-keys")
	}
	if _, hasCACert := cfg.CACert(); !hasCACert {
		return fmt.Errorf("environment configuration has no ca-cert")
	}
	if _, hasCAKey := cfg.CAPrivateKey(); !hasCAKey {
		return fmt.Errorf("environment configuration has no ca-private-key")
	}
	// Write out the bootstrap-init file, and confirm storage is writeable.
	if err := environs.VerifyStorage(environ.Storage()); err != nil {
		return err
	}
	logger.Debugf("environment %q supports service/machine networks: %v", environ.Name(), environ.SupportNetworks())
	logger.Infof("bootstrapping environment %q", environ.Name())
	return environ.Bootstrap(ctx, args)
}

func assertEnvironNotDestroyed(c *gc.C, env environs.Environ, store configstore.Storage) {
	info, err := store.ReadInfo(env.Name())
	c.Assert(err, gc.IsNil)
	c.Assert(info.Initialized(), jc.IsTrue)

	_, err = environs.NewFromName(env.Name(), store)
	c.Assert(err, gc.IsNil)
}

// Destroy is a common implementation of the Destroy method defined on
// environs.Environ; we strongly recommend that this implementation be
// used when writing a new provider.
func Destroy(env environs.Environ) error {
	logger.Infof("destroying environment %q", env.Name())
	instances, err := env.AllInstances()
	switch err {
	case nil:
		if err := env.StopInstances(instances); err != nil {
			return err
		}
		fallthrough
	case environs.ErrNoInstances:
		return env.Storage().RemoveAll()
	}
	return err
}

// setParams sets parameters based on the environment configuration
// for those which have not been explicitly specified.
func (c *ImageMetadataCommand) setParams(context *cmd.Context) error {
	c.privateStorage = "<private storage name>"
	var environ environs.Environ
	if store, err := configstore.Default(); err == nil {
		if environ, err = environs.PrepareFromName(c.EnvName, context, store); err == nil {
			logger.Infof("creating image metadata for environment %q", environ.Name())
			// If the user has not specified region and endpoint, try and get it from the environment.
			if c.Region == "" || c.Endpoint == "" {
				var cloudSpec simplestreams.CloudSpec
				if inst, ok := environ.(simplestreams.HasRegion); ok {
					if cloudSpec, err = inst.Region(); err != nil {
						return err
					}
				} else {
					return fmt.Errorf("environment %q cannot provide region and endpoint", environ.Name())
				}
				// If only one of region or endpoint is provided, that is a problem.
				if cloudSpec.Region != cloudSpec.Endpoint && (cloudSpec.Region == "" || cloudSpec.Endpoint == "") {
					return fmt.Errorf("cannot generate metadata without a complete cloud configuration")
				}
				if c.Region == "" {
					c.Region = cloudSpec.Region
				}
				if c.Endpoint == "" {
					c.Endpoint = cloudSpec.Endpoint
				}
			}
			cfg := environ.Config()
			if c.Series == "" {
				c.Series = config.PreferredSeries(cfg)
			}
			if v, ok := cfg.AllAttrs()["control-bucket"]; ok {
				c.privateStorage = v.(string)
			}
		} else {
			logger.Warningf("environment %q could not be opened: %v", c.EnvName, err)
		}
	}
	if environ == nil {
		logger.Infof("no environment found, creating image metadata using user supplied data")
	}
	if c.Series == "" {
		c.Series = config.LatestLtsSeries()
	}
	if c.ImageId == "" {
		return fmt.Errorf("image id must be specified")
	}
	if c.Region == "" {
		return fmt.Errorf("image region must be specified")
	}
	if c.Endpoint == "" {
		return fmt.Errorf("cloud endpoint URL must be specified")
	}
	if c.Dir == "" {
		logger.Infof("no destination directory specified, using current directory")
		var err error
		if c.Dir, err = os.Getwd(); err != nil {
			return err
		}
	}
	return nil
}