prometheus埋点监控springboot2.X项目jvm,接口性能错误，其它业务指标

1/方案

通过Micrometer+actuator暴露拉取metric的端点给Prometheus，通过grafana导入相关优秀模板进行jvm展示，业务方便在dashboard追加自定义panel展示，其中接口指标通过aop环绕通知上报指标，还有种方案通过nginx-vts-exporter实现。

2/依赖

      
            org.springframework.boot
            spring-boot-starter-actuator
        
        
            io.micrometer
            micrometer-registry-prometheus
        

3/配置

暴露监控端点，查看是否有metric了http://localhost:8990/actuator/prometheus 

management:
  endpoints:
    web:
      exposure:
        include: '*'

4/启动类

这样可以监控JVM了，grafana挑个模板如id 4701即可暂时

    @Bean
    MeterRegistryCustomizer configurer(@Value("${spring.application.name}") String applicationName){
        return registry -> registry.config().commonTags("application",applicationName);
    }

5/代码埋点上报metric到本地

aop环绕，非接口监控或只监控指定的接口考虑使用自定义注解进行统一控制

@Aspect
@Slf4j
@Component
public class LogAspect {

  @Autowired
  MeterRegistry registry;
  private Counter counter1; //counter类型：采集订单量总金额等业务数据，只增不减
  private  Counter counter2 ;
  private List gaugeCollectionSize; //gauge类型，收集集合size，如果实时令牌数/实时事务数，可增可减
  private Map gaugeMapSize; 
  private AtomicInteger intGauge;
  private DistributionSummary summary;

  @PostConstruct
  private void init(){ //这些变量的变化会被监控
    counter2=Counter.builder("test_new_coounter").description("测试counter").tag("env","test").register(registry);
    counter1 = registry.counter("order_list_req_total","listCount","listCount");
    gaugeCollectionSize =registry.gaugeCollectionSize("collectionSizeGauge", Lists.newArrayList(new ImmutableTag("env","test")),new CopyOnWriteArrayList());
    gaugeMapSize =registry.gaugeMapSize("mapSizeGauge", Lists.newArrayList(new ImmutableTag("env","test")),new ConcurrentHashMap<>());
    intGauge=registry.gauge("intRandomGauge", Lists.newArrayList(new ImmutableTag("env","test")),new AtomicInteger());

  }

  @Around("execution(public * com.construn.vehicle.*.controller.*.*(..))")
  public Object arround(ProceedingJoinPoint pjp) throws Throwable {
    long start= System.currentTimeMillis();
    Object obj= pjp.proceed();
    ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
    HttpServletRequest req = attributes.getRequest();
    Tag tag1=new ImmutableTag("uri",req.getRequestURI());
    Tag tag2=new ImmutableTag("ip",req.getHeader("x_forwarded_ip"));
    Tag tag3=new ImmutableTag("method",req.getMethod());
    Tag tag4=obj instanceof ResultEntity?new ImmutableTag("code",( (ResultEntity) obj).getCode()):new ImmutableTag("code", ErrorEnum.UNKNOWN_ERROR.getCode());
    summary = registry.summary("api_summary",Lists.newArrayList(tag1,tag2,tag3,tag4)); //这里tag是变化的，不同于其它conter gauge指标类型可以在postConstrun方法初始化
    summary.record(System.currentTimeMillis()-start);
    return obj;
  }

}

6/grafana定义panel

grafana没饼图，需要使用bin目录下的grafana-cli命令安装插件。。。，关键要掌握promQL,

参考https://yunlzheng.gitbook.io/prometheus-book/part-iii-prometheus-shi-zhan/readmd

请求耗时topk：topk(5,api_summary_max{job="springboot-payment"}) by (job)

异常状态码：api_summary_count{code!="0"} //添加报警

参考文章：https://blog.csdn.net/zhuyu19911016520/article/details/88383098