fix: watch failure caused instance list not to be updated

contrib/registry/consul/client.go

@@ -41,6 +41,8 @@ type Client struct {
 	deregisterCriticalServiceAfter int
 	// serviceChecks  user custom checks
 	serviceChecks api.AgentServiceChecks
+	// reRegistry re-registry when service is deregistered
+	reRegistry bool
 }
 
 func defaultResolver(_ context.Context, entries []*api.ServiceEntry) []*registry.ServiceInstance {
@@ -223,12 +225,14 @@ func (c *Client) Register(_ context.Context, svc *registry.ServiceInstance, enab
 					err = c.cli.Agent().UpdateTTL("service:"+svc.ID, "pass", "pass")
 					if err != nil {
 						log.Errorf("[Consul] update ttl heartbeat to consul failed! err=%v", err)
-						// when the previous report fails, try to re register the service
-						time.Sleep(time.Duration(rand.Intn(5)) * time.Second)
-						if err := c.cli.Agent().ServiceRegister(asr); err != nil {
-							log.Errorf("[Consul] re registry service failed!, err=%v", err)
-						} else {
-							log.Warn("[Consul] re registry of service occurred success")
+						if c.reRegistry {
+							// when the previous report fails, try to re register the service
+							time.Sleep(time.Duration(rand.Intn(5)) * time.Second)
+							if err := c.cli.Agent().ServiceRegister(asr); err != nil {
+								log.Errorf("[Consul] re registry service failed!, err=%v", err)
+							} else {
+								log.Warn("[Consul] re registry of service occurred success")
+							}
 						}
 					}
 				}

contrib/registry/consul/registry.go

@@ -86,6 +86,13 @@ func WithServiceCheck(checks ...*api.AgentServiceCheck) Option {
 	}
 }
 
+// WithReRegistry re-registry when service is deregistered
+func WithReRegistry() Option {
+	return func(r *Registry) {
+		r.cli.reRegistry = true
+	}
+}
+
 // Config is consul registry config
 type Config struct {
 	*api.Config
@@ -190,7 +197,6 @@ func (r *Registry) Watch(ctx context.Context, name string) (registry.Watcher, er
 			services:    &atomic.Value{},
 			serviceName: name,
 		}
-		r.registry[name] = set
 	}
 
 	// init watcher
@@ -215,6 +221,9 @@ func (r *Registry) Watch(ctx context.Context, name string) (registry.Watcher, er
 			return nil, err
 		}
 	}
+
+	r.registry[name] = set
+
 	return w, nil
 }