// validateFullConfig validates a fully-constructed storage config,
// combining the user-specified config and any internally specified
// config.
func (p *rootfsProvider) validateFullConfig(cfg *storage.Config) error {
if err := p.ValidateConfig(cfg); err != nil {
return err
}
storageDir, ok := cfg.ValueString(storage.ConfigStorageDir)
if !ok || storageDir == "" {
return errors.New("storage directory not specified")
}
return nil
}
// FilesystemSource is defined on the Provider interface.
func (p *rootfsProvider) FilesystemSource(environConfig *config.Config, sourceConfig *storage.Config) (storage.FilesystemSource, error) {
if err := p.validateFullConfig(sourceConfig); err != nil {
return nil, err
}
// storageDir is validated by validateFullConfig.
storageDir, _ := sourceConfig.ValueString(storage.ConfigStorageDir)
return &rootfsFilesystemSource{
&osDirFuncs{p.run},
p.run,
storageDir,
}, nil
}
// VolumeSource is defined on the Provider interface.
func (lp *loopProvider) VolumeSource(sourceConfig *storage.Config) (storage.VolumeSource, error) {
if err := lp.validateFullConfig(sourceConfig); err != nil {
return nil, err
}
// storageDir is validated by validateFullConfig.
storageDir, _ := sourceConfig.ValueString(storage.ConfigStorageDir)
return &loopVolumeSource{
&osDirFuncs{lp.run},
lp.run,
storageDir,
}, nil
}
// ValidateConfig is defined on the Provider interface.
func (e *ebsProvider) ValidateConfig(cfg *storage.Config) error {
_, err := newEbsConfig(cfg.Attrs())
return errors.Trace(err)
}
// ValidateConfig is defined on the Provider interface.
func (e *azureStorageProvider) ValidateConfig(cfg *storage.Config) error {
_, err := newAzureStorageConfig(cfg.Attrs())
return errors.Trace(err)
}
// ValidateConfig performs storage provider config validation, including
// any common validation.
func ValidateConfig(p storage.Provider, cfg *storage.Config) error {
if p.Scope() == storage.ScopeMachine && cfg.IsPersistent() {
return errors.Errorf("machine scoped storage provider %q does not support persistent storage", cfg.Name())
}
return p.ValidateConfig(cfg)
}
func addDefaultPool(pm PoolManager, pool *storage.Config) error {
_, err := pm.Get(pool.Name())
if err != nil && !errors.IsNotFound(err) {
return errors.Annotatef(err, "loading default pool %q", pool.Name())
}
if err != nil {
// We got a not found error, so default pool doesn't exist.
if _, err := pm.Create(pool.Name(), pool.Provider(), pool.Attrs()); err != nil {
return errors.Annotatef(err, "creating default pool %q", pool.Name())
}
}
return nil
}