Addition of a NULL Backend to provide a simple way of disabling backend

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segmentio · Sep 27, 2018 · d2451a0 · d2451a0
1 parent bbd6729
commit d2451a0
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Showing 3 changed files with 48 additions and 1 deletion.
diff --git a/README.md b/README.md
@@ -214,6 +214,13 @@ To configure chamber to use the S3 backend, set `CHAMBER_SECRET_BACKEND` to `S3`
 
 This feature is experimental, and not currently meant for production work.
 
+## Null Backend (experimental)
+
+If it's preferred to not use any backend at all, set `CHAMBER_SECRET_BACKEND` to `NULL`. Doing so will forward existing ENV variables as if Chamber is not in between.
+
+This feature is experimental, and not currently meant for production work.
+
+
 ## Releasing
 
 To cut a new release, just push a tag named `v<semver>` where `<semver>` is a

diff --git a/cmd/root.go b/cmd/root.go
@@ -30,13 +30,14 @@ const (
 )
 
 const (
+	NullBackend = "NULL"
 	SSMBackend = "SSM"
 	S3Backend  = "S3"
 
 	BackendEnvVar = "CHAMBER_SECRET_BACKEND"
 )
 
-var Backends = []string{SSMBackend, S3Backend}
+var Backends = []string{SSMBackend, S3Backend, NullBackend}
 
 // RootCmd represents the base command when called without any subcommands
 var RootCmd = &cobra.Command{
@@ -90,6 +91,8 @@ func getSecretStore() (store.Store, error) {
 	var s store.Store
 	var err error
 	switch backend {
+	case NullBackend:
+		s = store.NewNullStore()
 	case S3Backend:
 		s, err = store.NewS3Store(numRetries)
 	case SSMBackend:

diff --git a/store/nullstore.go b/store/nullstore.go
@@ -0,0 +1,37 @@
+package store
+
+import (
+	"errors"
+)
+
+var _ Store = &NullStore{}
+
+type NullStore struct{}
+
+func NewNullStore() *NullStore {
+	return &NullStore{}
+}
+
+func (s *NullStore) Write(id SecretId, value string) error {
+	return errors.New("Write is not implemented for Null Store")
+}
+
+func (s *NullStore) Read(id SecretId, version int) (Secret, error) {
+	return Secret{}, errors.New("Not implemented for Null Store")
+}
+
+func (s *NullStore) List(service string, includeValues bool) ([]Secret, error) {
+	return []Secret{}, nil
+}
+
+func (s *NullStore) ListRaw(service string) ([]RawSecret, error) {
+	return []RawSecret{}, nil
+}
+
+func (s *NullStore) History(id SecretId) ([]ChangeEvent, error) {
+	return []ChangeEvent{}, nil
+}
+
+func (s *NullStore) Delete(id SecretId) error {
+	return errors.New("Not implemented for Null Store")
+}