fix registry TTL. (#1537)

* fix registry.
1. When etcd stops, the application cannot stop.
2. Stop consul first, then stop app. Then start consul, the registered service remains in consul registry as an unhealthy status.

Co-authored-by: corel <corelchen@qq.com>

app.go

@@ -117,6 +117,7 @@ func (a *App) Run() error {
 				err := a.Stop()
 				if err != nil {
 					a.opts.logger.Errorf("failed to stop app: %v", err)
+					return err
 				}
 			}
 		}

contrib/registry/consul/client.go

@@ -90,17 +90,19 @@ func (d *Client) Register(ctx context.Context, svc *registry.ServiceInstance, en
 		Port:            int(port),
 		Checks: []*api.AgentServiceCheck{
 			{
-				CheckID: "service:" + svc.ID,
-				TTL:     "50s",
-				Status:  "passing",
+				CheckID:                        "service:" + svc.ID,
+				TTL:                            "30s",
+				Status:                         "passing",
+				DeregisterCriticalServiceAfter: "90s",
 			},
 		},
 	}
 	if enableHealthCheck {
 		asr.Checks = append(asr.Checks, &api.AgentServiceCheck{
-			TCP:      fmt.Sprintf("%s:%d", addr, port),
-			Interval: "20s",
-			Status:   "passing",
+			TCP:                            fmt.Sprintf("%s:%d", addr, port),
+			Interval:                       "20s",
+			Status:                         "passing",
+			DeregisterCriticalServiceAfter: "90s",
 		})
 	}
 	err := d.cli.Agent().ServiceRegister(asr)