Add a Stop() function

components.go

@@ -153,6 +153,34 @@ func (c *Components) Init(context *cli.Context) error {
 	return nil
 }
 
+func (c *Components) Stop() error {
+	// Sort Components by Priority DESC
+	components := make([]Component, len(c.components))
+	for _, com := range c.components {
+		components = append(components, com)
+	}
+	sort.SliceStable(components, func(i, j int) bool {
+		if components[i] == nil || components[j] == nil {
+			return false
+		}
+
+		return components[i].Priority() > components[j].Priority()
+	})
+
+	// Init them sorted now
+	for _, component := range components {
+		if c == nil {
+			continue
+		}
+
+		if err := component.Stop(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 func (c *Components) Health(context context.Context) HealthInfoMap {
 	result := make(HealthInfoMap, len(c.components))