func destroyStorage(env environs.Environ) error {
logger.Infof("destroying storage")
environConfig := env.Config()
storageProviderTypes, ok := registry.EnvironStorageProviders(environConfig.Type())
if !ok {
return nil
}
for _, storageProviderType := range storageProviderTypes {
storageProvider, err := registry.StorageProvider(storageProviderType)
if err != nil {
return errors.Trace(err)
}
if !storageProvider.Dynamic() {
continue
}
if storageProvider.Scope() != storage.ScopeEnviron {
continue
}
if err := destroyVolumes(environConfig, storageProviderType, storageProvider); err != nil {
return errors.Trace(err)
}
// TODO(axw) destroy env-level filesystems when we have them.
}
return nil
}
// machineVolumeParams retrieves VolumeParams for the volumes that should be
// provisioned with, and attached to, the machine. The client should ignore
// parameters that it does not know how to handle.
func (p *ProvisionerAPI) machineVolumeParams(m *state.Machine) ([]params.VolumeParams, error) {
volumeAttachments, err := m.VolumeAttachments()
if err != nil {
return nil, err
}
if len(volumeAttachments) == 0 {
return nil, nil
}
envConfig, err := p.st.EnvironConfig()
if err != nil {
return nil, err
}
poolManager := poolmanager.New(state.NewStateSettings(p.st))
allVolumeParams := make([]params.VolumeParams, 0, len(volumeAttachments))
for _, volumeAttachment := range volumeAttachments {
volumeTag := volumeAttachment.Volume()
volume, err := p.st.Volume(volumeTag)
if err != nil {
return nil, errors.Annotatef(err, "getting volume %q", volumeTag.Id())
}
storageInstance, err := storagecommon.MaybeAssignedStorageInstance(
volume.StorageInstance, p.st.StorageInstance,
)
if err != nil {
return nil, errors.Annotatef(err, "getting volume %q storage instance", volumeTag.Id())
}
volumeParams, err := storagecommon.VolumeParams(volume, storageInstance, envConfig, poolManager)
if err != nil {
return nil, errors.Annotatef(err, "getting volume %q parameters", volumeTag.Id())
}
provider, err := registry.StorageProvider(storage.ProviderType(volumeParams.Provider))
if err != nil {
return nil, errors.Annotate(err, "getting storage provider")
}
if provider.Dynamic() {
// Leave dynamic storage to the storage provisioner.
continue
}
volumeAttachmentParams, ok := volumeAttachment.Params()
if !ok {
// Attachment is already provisioned; this is an insane
// state, so we should not proceed with the volume.
return nil, errors.Errorf(
"volume %s already attached to machine %s",
volumeTag.Id(), m.Id(),
)
}
// Not provisioned yet, so ask the cloud provisioner do it.
volumeParams.Attachment = ¶ms.VolumeAttachmentParams{
volumeTag.String(),
m.Tag().String(),
"", // we're creating the volume, so it has no volume ID.
"", // we're creating the machine, so it has no instance ID.
volumeParams.Provider,
volumeAttachmentParams.ReadOnly,
}
allVolumeParams = append(allVolumeParams, volumeParams)
}
return allVolumeParams, nil
}
// Create is defined on PoolManager interface.
func (pm *poolManager) Create(name string, providerType storage.ProviderType, attrs map[string]interface{}) (*storage.Config, error) {
if name == "" {
return nil, MissingNameError
}
if providerType == "" {
return nil, MissingTypeError
}
cfg, err := storage.NewConfig(name, providerType, attrs)
if err != nil {
return nil, errors.Trace(err)
}
p, err := registry.StorageProvider(providerType)
if err != nil {
return nil, errors.Trace(err)
}
if err := provider.ValidateConfig(p, cfg); err != nil {
return nil, errors.Annotate(err, "validating storage provider config")
}
poolAttrs := cfg.Attrs()
poolAttrs[Name] = name
poolAttrs[Type] = string(providerType)
if err := pm.settings.CreateSettings(globalKey(name), poolAttrs); err != nil {
return nil, errors.Annotatef(err, "creating pool %q", name)
}
return cfg, nil
}
func (s *providerRegistrySuite) TestRegisterProvider(c *gc.C) {
p1 := &mockProvider{}
ptype := storage.ProviderType("foo")
registry.RegisterProvider(ptype, p1)
p, err := registry.StorageProvider(ptype)
c.Assert(err, jc.ErrorIsNil)
c.Assert(p, gc.Equals, p1)
}
func (s *providerRegistrySuite) TestUnregisterProvider(c *gc.C) {
ptype := storage.ProviderType("foo")
// No-op, since there's nothing registered yet.
registry.RegisterProvider(ptype, nil)
// Register and then unregister, ensure that the provider cannot
// be accessed.
registry.RegisterProvider(ptype, &mockProvider{})
registry.RegisterProvider(ptype, nil)
_, err := registry.StorageProvider(storage.ProviderType("foo"))
c.Assert(err, gc.ErrorMatches, `storage provider "foo" not found`)
}
// StoragePoolConfig returns the storage provider type and
// configuration for a named storage pool. If there is no
// such pool with the specified name, but it identifies a
// storage provider, then that type will be returned with a
// nil configuration.
func StoragePoolConfig(name string, poolManager poolmanager.PoolManager) (storage.ProviderType, *storage.Config, error) {
pool, err := poolManager.Get(name)
if errors.IsNotFound(err) {
// If not a storage pool, then maybe a provider type.
providerType := storage.ProviderType(name)
if _, err1 := registry.StorageProvider(providerType); err1 != nil {
return "", nil, errors.Trace(err)
}
return providerType, &storage.Config{}, nil
} else if err != nil {
return "", nil, errors.Annotatef(err, "getting pool %q", name)
}
return pool.Provider(), pool, nil
}
func poolStorageProvider(st *State, poolName string) (storage.ProviderType, storage.Provider, error) {
poolManager := poolmanager.New(NewStateSettings(st))
pool, err := poolManager.Get(poolName)
if errors.IsNotFound(err) {
// If there's no pool called poolName, maybe a provider type
// has been specified directly.
providerType := storage.ProviderType(poolName)
provider, err1 := registry.StorageProvider(providerType)
if err1 != nil {
// The name can't be resolved as a storage provider type,
// so return the original "pool not found" error.
return "", nil, errors.Trace(err)
}
return providerType, provider, nil
} else if err != nil {
return "", nil, errors.Trace(err)
}
providerType := pool.Provider()
provider, err := registry.StorageProvider(providerType)
if err != nil {
return "", nil, errors.Trace(err)
}
return providerType, provider, nil
}
// storageConfig returns the provider type and config attributes for the
// specified poolName. If no such pool exists, we check to see if poolName is
// actually a provider type, in which case config will be empty.
func storageConfig(st *state.State, poolName string) (storage.ProviderType, map[string]interface{}, error) {
pm := poolmanager.New(state.NewStateSettings(st))
p, err := pm.Get(poolName)
// If not a storage pool, then maybe a provider type.
if errors.IsNotFound(err) {
providerType := storage.ProviderType(poolName)
if _, err1 := registry.StorageProvider(providerType); err1 != nil {
return "", nil, errors.Trace(err)
}
return providerType, nil, nil
}
if err != nil {
return "", nil, errors.Trace(err)
}
return p.Provider(), p.Attrs(), nil
}
func sourceParams(providerType storage.ProviderType, sourceName, baseStorageDir string) (storage.Provider, *storage.Config, error) {
provider, err := registry.StorageProvider(providerType)
if err != nil {
return nil, nil, errors.Annotate(err, "getting provider")
}
attrs := make(map[string]interface{})
if baseStorageDir != "" {
storageDir := filepath.Join(baseStorageDir, sourceName)
attrs[storage.ConfigStorageDir] = storageDir
}
sourceConfig, err := storage.NewConfig(sourceName, providerType, attrs)
if err != nil {
return nil, nil, errors.Annotate(err, "getting config")
}
return provider, sourceConfig, nil
}
func configFromSettings(settings map[string]interface{}) (*storage.Config, error) {
providerType := storage.ProviderType(settings[Type].(string))
name := settings[Name].(string)
// Ensure returned attributes are stripped of name and type,
// as these are not user-specified attributes.
delete(settings, Name)
delete(settings, Type)
cfg, err := storage.NewConfig(name, providerType, settings)
if err != nil {
return nil, errors.Trace(err)
}
p, err := registry.StorageProvider(providerType)
if err != nil {
return nil, errors.Trace(err)
}
if err := provider.ValidateConfig(p, cfg); err != nil {
return nil, errors.Trace(err)
}
return cfg, nil
}
func (*maasProviderSuite) TestMAASProviderRegistered(c *gc.C) {
p, err := registry.StorageProvider(maas.MaasStorageProviderType)
c.Assert(err, jc.ErrorIsNil)
_, ok := p.(storage.Provider)
c.Assert(ok, jc.IsTrue)
}
func (s *providerRegistrySuite) TestNoSuchProvider(c *gc.C) {
_, err := registry.StorageProvider(storage.ProviderType("foo"))
c.Assert(err, gc.ErrorMatches, `storage provider "foo" not found`)
}
func (*providerSuite) TestEBSProviderRegistered(c *gc.C) {
p, err := registry.StorageProvider(ec2.EBS_ProviderType)
c.Assert(err, jc.ErrorIsNil)
_, ok := p.(storage.Provider)
c.Assert(ok, jc.IsTrue)
}