Improve the health function

components.go

@@ -163,8 +163,14 @@ func (c *Components) Health(context context.Context) HealthInfoMap {
 	result := make(HealthInfoMap, len(c.components))
 
 	for _, component := range c.components {
-		m, e := component.Health(context)
-		result[component.Name()] = HealthInfo{Message: m, IsError: e}
+		err := component.Health(context)
+		m := "All fine"
+		isError := false
+		if err != nil {
+			m = err.Error()
+			isError = true
+		}
+		result[component.Name()] = HealthInfo{Message: m, IsError: isError}
 	}
 
 	return result

interface.go

@@ -13,8 +13,8 @@ type Component interface {
 	Initialized() bool
 	Init(components *Components, cli *cli.Context) error
 	Stop() error
-	MergeFlags(components *Components, flags []cli.Flag) []cli.Flag
-	Health(context context.Context) (string, bool)
+	MergeFlags(r *Components, flags []cli.Flag) []cli.Flag
+	Health(context context.Context) error
 
 	WrapperFunc(ctx context.Context, req server.Request, rsp interface{}) error
 }