SpringBoot2.x使用Actuator来做应用监控 - 好文

Actuator

Spring-boot-actuator
<https://github.com/spring-projects/spring-boot/tree/v2.0.2.RELEASE/spring-boot-project/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。

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添加依赖，开启监控
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <
artifactId>spring-boot-starter-actuator</artifactId> </dependency> </
dependencies>
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特性

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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。

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Metrics

Spring Boot Actuator 提供 dimensional metrics 通过集成 Micrometer
<https://micrometer.io/>.

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Audit

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

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2.0 更新

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基础路径更新

基础路径由 / 调整到 /actuator 下

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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：

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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
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通过web访问暴露的端点

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http://localhost:8077/actuator/metrics <http://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"]}
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http://localhost:8077/actuator/metrics/jvm.memory.max
<http://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
<https://blog.csdn.net/myherux/article/details/80667524>

Influx

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添加依赖
<dependency> <groupId>io.micrometer</groupId> <artifactId>
micrometer-registry-influx</artifactId> </dependency>

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