Add Finalize method to seal.

command/server.go

@@ -381,6 +381,11 @@ func (c *ServerCommand) Run(args []string) int {
 		listener.Close()
 	}
 
+	err = seal.Finalize()
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf("Error finalizing seals: %v", err))
+	}
+
 	return 0
 }
 

vault/seal.go

@@ -30,6 +30,7 @@ const (
 type Seal interface {
 	SetCore(*Core)
 	Init() error
+	Finalize() error
 
 	StoredKeysSupported() bool
 	SetStoredKeys([][]byte) error
@@ -65,6 +66,10 @@ func (d *DefaultSeal) Init() error {
 	return nil
 }
 
+func (d *DefaultSeal) Finalize() error {
+	return nil
+}
+
 func (d *DefaultSeal) StoredKeysSupported() bool {
 	return false
 }