springboot admin+nacos+钉钉机器人监控不到服务上线通知问题

逃离我推掉我的手 2021-09-01 08:32 883阅读 0赞

最近在搞admin监控时，遇到一个坑。背景是这样得，使用得事nacos做注册中心，开发了admin server服务以后，服务offline，down状态可以正常推送到钉钉，但是up状态一直监控不到，网上查了一些资料，相关说明较少，有一篇文章是说要复制NacosWatch.java，本地实现一下，因为nacos没有监听上线通知。  
按说明操作了，但是还是不好使。相关代码如下：

*  NacosWatch.java

/** * @ClassName: NacosWatch * @Author: shuyu.wang * @Description: * @Date: 2020/6/1 14:02 * @Version: 1.0 */
    @Slf4j
    public class NacosWatch implements ApplicationEventPublisherAware, SmartLifecycle { 
    
      /** * watch delay,duration to pull new service from nacos server. */
      private long watchDelay = 30000;
    
      private final NacosDiscoveryProperties properties;
      private final TaskScheduler taskScheduler;
      private final AtomicLong nacosWatchIndex;
      private final AtomicBoolean running;
      private ApplicationEventPublisher publisher;
      private ScheduledFuture<?> watchFuture;
      private Set<String> cacheServices;
      private HashMap<String, EventListener> subscribeListeners;
    
      public NacosWatch(NacosDiscoveryProperties properties) { 
        this(properties, getTaskScheduler());
      }
    
      public NacosWatch(NacosDiscoveryProperties properties, TaskScheduler taskScheduler) { 
        this.nacosWatchIndex = new AtomicLong(0L);
        this.running = new AtomicBoolean(false);
        this.cacheServices = new HashSet();
        this.subscribeListeners = new HashMap();
        this.properties = properties;
        this.taskScheduler = taskScheduler;
      }
    
      private static ThreadPoolTaskScheduler getTaskScheduler() { 
        ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler();
        taskScheduler.initialize();
        return taskScheduler;
      }
    
      @Override
      public void setApplicationEventPublisher(ApplicationEventPublisher publisher) { 
        this.publisher = publisher;
      }
    
      @Override
      public boolean isAutoStartup() { 
        return true;
      }
    
      @Override
      public void stop(Runnable callback) { 
        this.stop();
        callback.run();
      }
    
      @Override
      public void start() { 
        if (this.running.compareAndSet(false, true)) { 
          this.watchFuture =
              this.taskScheduler.scheduleWithFixedDelay(this::nacosServicesWatch, watchDelay);
        }
    
      }
    
      @Override
      public void stop() { 
        if (this.running.compareAndSet(true, false) && this.watchFuture != null) { 
          this.watchFuture.cancel(true);
        }
    
      }
    
      @Override
      public boolean isRunning() { 
        return false;
      }
    
      @Override
      public int getPhase() { 
        return 0;
      }
    
      public void nacosServicesWatch() { 
        try { 
          boolean changed = false;
          NamingService namingService = this.properties.namingServiceInstance();
          ListView<String>
              listView = this.properties.namingServiceInstance().getServicesOfServer(1, 2147483647);
          List<String> serviceList = listView.getData();
          Set<String> currentServices = new HashSet(serviceList);
          currentServices.removeAll(this.cacheServices);
          if (currentServices.size() > 0) { 
            changed = true;
          }
    
          Iterator var6;
          String serviceName;
          if (this.cacheServices.removeAll(new HashSet(serviceList)) && this.cacheServices.size() > 0) { 
            changed = true;
            var6 = this.cacheServices.iterator();
    
            while (var6.hasNext()) { 
              serviceName = (String) var6.next();
              namingService
                  .unsubscribe(serviceName, (EventListener) this.subscribeListeners.get(serviceName));
              this.subscribeListeners.remove(serviceName);
            }
          }
    
          this.cacheServices = new HashSet(serviceList);
          var6 = this.cacheServices.iterator();
    
          while (var6.hasNext()) { 
            serviceName = (String) var6.next();
            if (!this.subscribeListeners.containsKey(serviceName)) { 
              EventListener eventListener = (event) -> { 
                this.publisher
                    .publishEvent(new HeartbeatEvent(this, this.nacosWatchIndex.getAndIncrement()));
              };
              this.subscribeListeners.put(serviceName, eventListener);
              namingService.subscribe(serviceName, eventListener);
            }
          }
    
          if (changed) { 
            this.publisher
                .publishEvent(new HeartbeatEvent(this, this.nacosWatchIndex.getAndIncrement()));
          }
        } catch (Exception var9) { 
          log.error("Error watching Nacos Service change", var9);
        }
    
      }
    }

*  NacosWatchAutoConfiguration.java

@Configuration
    public class NacosWatchAutoConfiguration { 
      @Bean
      @ConditionalOnMissingBean
      @ConditionalOnProperty(value = "spring.cloud.nacos.discovery.watch.enabled", matchIfMissing = true)
      public NacosWatch nacosWatchDeepBlue(NacosDiscoveryProperties nacosDiscoveryProperties) { 
        return new NacosWatch(nacosDiscoveryProperties);
      }
    
    }

添加上这两个类以后，一顿debug，但是还是一直没有上线状态得提醒，最后发现自定义通知类继承得AbstractStatusChangeNotifier.java需要重写两个方法。  
正常情况下我们一般只会重写 doNotify(InstanceEvent event, Instance instance)这个方法，但实际上还要重写shouldNotify(InstanceEvent event, Instance instance)方法父类中只对UNKNOWN:UP得状态变化做了推送。  
最终自定义通知类如下：  
DingTalkNotifier.java

@Slf4j
    public class DingTalkNotifier extends AbstractStatusChangeNotifier { 
    
    
      @Autowired
      private AlarmDingTalkRobotClient alarmDingTalkRobotClient;
      @Autowired
      private NacosConfigService nacosConfigService;
      /** * 消息模板 */
      private static final String template = "<<<%s>>> \n 【服务名】: %s(%s) \n 【状态】: %s(%s) \n 【服务ip】: %s \n 【详情】: %s";
    
      private String titleAlarm = "系统告警";
    
      private String titleNotice = "系统通知";
    
      private String[] ignoreChanges = new String[]{ "UNKNOWN:UP","DOWN:UP","OFFLINE:UP"};
    
      public DingTalkNotifier(InstanceRepository repository) { 
        super(repository);
      }
    
      @Override
      protected boolean shouldNotify(InstanceEvent event, Instance instance) { 
        if (!(event instanceof InstanceStatusChangedEvent)) { 
          return false;
        } else { 
          InstanceStatusChangedEvent statusChange = (InstanceStatusChangedEvent)event;
          String from = this.getLastStatus(event.getInstance());
          String to = statusChange.getStatusInfo().getStatus();
          return Arrays.binarySearch(this.ignoreChanges, from + ":" + to) < 0 && Arrays.binarySearch(this.ignoreChanges, "*:" + to) < 0 && Arrays.binarySearch(this.ignoreChanges, from + ":*") < 0;
        }
      }
    
      @Override
      protected Mono<Void> doNotify(InstanceEvent event, Instance instance) { 
    
        return Mono.fromRunnable(() -> { 
          if (!nacosConfigService.getIsopen()){ 
            return;
          }
          String watchapplications = nacosConfigService.getWatchapplications();
          Boolean flag=watchapplications.contains(instance.getRegistration().getName());
          if (!flag){ 
            return;
          }
          if (event instanceof InstanceStatusChangedEvent) { 
            log.info("Instance {} ({}) is {}", instance.getRegistration().getName(),
                event.getInstance(),
                ((InstanceStatusChangedEvent) event).getStatusInfo().getStatus());
    
            String status = ((InstanceStatusChangedEvent) event).getStatusInfo().getStatus();
            String messageText = null;
            switch (status) { 
              // 健康检查没通过
              case "DOWN":
                log.info("发送 健康检查没通过 的通知！");
                messageText = String
                    .format(template,titleAlarm, instance.getRegistration().getName(), event.getInstance(),
                        ((InstanceStatusChangedEvent) event).getStatusInfo().getStatus(), "健康检查没通过",
                        instance.getRegistration().getServiceUrl(), JSONObject.toJSONString(instance.getStatusInfo().getDetails()));
                alarmDingTalkRobotClient.sendMarkdownMessage(titleAlarm, messageText, true);
                break;
              // 服务离线
              case "OFFLINE":
                log.info("发送 服务离线 的通知！");
                messageText = String
                    .format(template,titleAlarm, instance.getRegistration().getName(), event.getInstance(),
                        ((InstanceStatusChangedEvent) event).getStatusInfo().getStatus(), "服务离线",
                        instance.getRegistration().getServiceUrl(), JSONObject.toJSONString(instance.getStatusInfo().getDetails()));
                alarmDingTalkRobotClient.sendMarkdownMessage(titleAlarm, messageText, true);
                break;
              //服务上线
              case "UP":
                log.info("发送 服务上线 的通知！");
                messageText = String
                    .format(template,titleNotice, instance.getRegistration().getName(), event.getInstance(),
                        ((InstanceStatusChangedEvent) event).getStatusInfo().getStatus(), "服务上线",
                        instance.getRegistration().getServiceUrl(), JSONObject.toJSONString(instance.getStatusInfo().getDetails()));
                alarmDingTalkRobotClient.sendMarkdownMessage(titleNotice, messageText, true);
                break;
              // 服务未知异常
              case "UNKNOWN":
                log.info("发送 服务未知异常 的通知！");
                messageText = String
                    .format(template,titleAlarm, instance.getRegistration().getName(), event.getInstance(),
                        ((InstanceStatusChangedEvent) event).getStatusInfo().getStatus(), "服务未知异常",
                        instance.getRegistration().getServiceUrl(), JSONObject.toJSONString(instance.getStatusInfo().getDetails()));
                alarmDingTalkRobotClient.sendMarkdownMessage(titleAlarm, messageText, true);
                break;
              default:
                break;
            }
          } else { 
            log.info("Instance {} ({}) {}", instance.getRegistration().getName(), event.getInstance(),
                event.getType());
          }
        });
      }
    
    
    }

其中AlarmDingTalkRobotClient类是钉钉报警自己封装得类，这里不做详细描述，大家可以根据自己业务需求，自行封装。  
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