new logger and etcd fixes

pkg/cluster/cluster.go

@@ -12,6 +12,7 @@ var (
 	ErrNotLeader      = errors.New("not leader")
 	ErrKeyNotFound    = errors.New("key not found")
 	ErrPrefixNotFound = errors.New("prefix not found")
+	ErrRestart        = errors.New("restart")
 )
 
 type Cluster interface {
@@ -19,6 +20,7 @@ type Cluster interface {
 	SetCallbacks(Callbacks) error
 	Stepdown()
 	Stop()
+	Reset()
 }
 
 type KV interface {
@@ -29,8 +31,8 @@ type KV interface {
 }
 
 type CallbackContext interface {
-	logr.Logger
 	KV
+	Logger() logr.Logger
 	ID() string
 	Fatal(error)
 }