学习笔记：JavaEE开发的颠覆者SpringBoot实战（十一）应用监控

一. http

Spring-boot-actuator module 可帮助您在将应用程序投入生产时监视和管理应用程序。您可以选择使用 HTTP 端点或 JMX 来管理和监控您的应用程序。Auditing, health, and metrics gathering 也可以自动应用于您的应用程序。

添加依赖，开启监控

<dependencies>
    <dependency>
        <groupid>org.springframework.boot</groupid>
        spring-boot-starter-actuator</artifactid>
    </dependency>
</dependencies>

特性

Endpoints

Actuator endpoints 允许你去监控和操作你的应用。SpringBoot包含了许多内置的端点，当然你也可以添加自己的端点。比如 health 端点就提供了基本的应用健康信息。

Metrics

Spring Boot Actuator 提供 dimensional metrics 通过集成 Micrometer.

Audit

Spring Boot Actuator 有一套灵活的审计框架会发布事件到 AuditEventRepository。

2.0 更新

基础路径更新

基础路径由 / 调整到 /actuator 下

启动端点 endpoint

默认只启动了 health 和 info 端点，可以通过 application.yml 配置修改：

management:
    endpoints:
        web:
        exposure:
           include: health,info,env,metrics

项目启动时可以看到暴露出来的接口信息：

 

主要的端点

HTTP方法	路径	描述	鉴权
GET	/autoconfig	查看自动配置的使用情况	true
GET	/configprops	查看配置属性，包括默认配置	true
GET	/beans	查看bean及其关系列表	true
GET	/dump	打印线程栈	true
GET	/env	查看所有环境变量	true
GET	/env/{name}	查看具体变量值	true
GET	/health	查看应用健康指标	false
GET	/info	查看应用信息	false
GET	/mappings	查看所有url映射	true
GET	/metrics	查看应用基本指标	true
GET	/metrics/{name}	查看具体指标	true
POST	/shutdown	关闭应用	true
GET	/trace	查看基本追踪信息	true

通过web访问暴露的端点

https://localhost:8077/actuator/metrics

{"names":["jvm.memory.max","process.files.max","jvm.gc.memory.promoted","tomcat.cache.hit","system.load.average.1m","tomcat.cache.access","jvm.memory.used","jvm.gc.max.data.size","jvm.memory.committed","system.cpu.count","logback.events","tomcat.global.sent","jvm.buffer.memory.used","tomcat.sessions.created","jvm.threads.daemon","system.cpu.usage","jvm.gc.memory.allocated","tomcat.global.request.max","tomcat.global.request","tomcat.sessions.expired","jvm.threads.live","jvm.threads.peak","tomcat.global.received","process.uptime","tomcat.sessions.rejected","process.cpu.usage","tomcat.threads.config.max","jvm.classes.loaded","jvm.gc.pause","jvm.classes.unloaded","tomcat.global.error","tomcat.sessions.active.current","tomcat.sessions.alive.max","jvm.gc.live.data.size","tomcat.servlet.request.max","tomcat.threads.current","tomcat.servlet.request","process.files.open","jvm.buffer.count","jvm.buffer.total.capacity","tomcat.sessions.active.max","tomcat.threads.busy","process.start.time","tomcat.servlet.error"]}

https://localhost:8077/actuator/metrics/jvm.memory.max

{"name":"jvm.memory.max","measurements":[{"statistic":"VALUE","value":3.455057919E9}],"availableTags":[{"tag":"area","values":["heap","nonheap"]},{"tag":"id","values":["Compressed Class Space","PS Survivor Space","PS Old Gen","Metaspace","PS Eden Space","Code Cache"]}]}

Micrometer

Springboot2 在 spring-boot-actuator 中引入了 micrometer ，对 1.x 的 metrics 进行了重构，另外支持对接的监控系统也更加丰富( Atlas、Datadog、Ganglia、Graphite、Influx、JMX、NewRelic、Prometheus、SignalFx、StatsD、Wavefront )。

Prometheus

SpringBoot2.x中的Prometheus应用

Influx

添加依赖

<dependency>
    <groupid>io.micrometer</groupid>
    <artifactid>micrometer-registry-influx</artifactid>
</dependency>

二. JMX

在控制台调用java内置的jconsole来实现JMX监控

打开cmd --> 输入命令：jconsole --> 在jconsole弹出页面选择相应的进程 --> 点击连接

 

三.SSH

spring boot 2.X弃用