Fix tcp check no ttl error

registry/consul_registry.go

@@ -180,12 +180,23 @@ func (c *consulRegistry) Register(s *Service, opts ...RegisterOption) error {
 
 	// if it's already registered and matches then just pass the check
 	if ok && v == h {
+		if options.TTL == time.Duration(0) {
+			services,_, err := c.Client.Health().Checks(s.Name, nil)
+			if err == nil {
+				for _, v := range services {
+					if v.ServiceID == node.Id {
+						return nil
+					}
+				}
+			}
+		}else{
 			// if the err is nil we're all good, bail out
 			// if not, we don't know what the state is, so full re-register
 			if err := c.Client.Agent().PassTTL("service:"+node.Id, ""); err == nil {
 				return nil
 			}
 		}
+	}
 
 	// encode the tags
 	tags := encodeMetadata(node.Metadata)