Java --- springboot3之可观测性

目录

一、可观测性

二、定制健康监控的端点

三、定制metrics

四、整合Prometheus+Grafana

---

一、可观测性

 导入pom依赖

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

通过springboot配置文件配置暴露端点

#通过web暴露所有监控端点
management.endpoints.web.exposure.include=*

通过访问地址得到所有http://localhost:8080/actuator

二、定制健康监控的端点

@Component
public class MyComponent {
    public int check(){
        return 1;
    }
}

@Component
public class MyHealthIndicator extends AbstractHealthIndicator {
    @Autowired
    private MyComponent myComponent;
    /**
     * 检查健康
     * @param builder
     * @throws Exception
     */
    @Override
    protected void doHealthCheck(Health.Builder builder) throws Exception {
        //自定义检查方法
        int check = myComponent.check();
        if (check == 1){
            //存活
            builder.up()
                    .withDetail("code","200")
                    .withDetail("msg","健康的运行")
                    .build();
        }else {
            builder.down()
                    .withDetail("code","400")
                    .withDetail("msg","运行崩溃了")
                    .build();
        }
    }
}

配置文件 

management.endpoint.health.enabled=true
management.endpoint.health.show-details=always

 效果图

三、定制metrics

@Component
public class MyComponent {
    Counter counter = null;
    public MyComponent(MeterRegistry meterRegistry) {
        counter = meterRegistry.counter("My.hello");
    }

    public int check(){
        return 1;
    }
    public void hello(){
        System.out.println("hello");
        counter.increment();
    }
}

@RestController
public class HelloController {
    @Autowired
    private MyComponent myComponent;
    @GetMapping("/hello")
    public void hello(){
        myComponent.hello();
    }
}

效果图

四、整合Prometheus+Grafana

导入Prometheus需要的依赖

<dependency>
            <groupId>io.micrometer</groupId>
            <artifactId>micrometer-registry-prometheus</artifactId>
        </dependency>

 将自己的Java程序打包上传到服务器部署

 安装liunx的jdk17

后台运行Java服务

修改 Prometheus配置文件

测试访问：

 整合Grafana