spring-boot-starter-actuator（健康监控）配置和使用

添加POM依赖：

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

application.yml中指定监控的HTTP端口（如果不指定，则使用和Server相同的端口）；指定去掉某项的检查（比如不监控health.mail）：

server:
  port: 8083
management:
    port: 8083
    security:
      enabled: false  #

监控和管理端点

http://localhost:8083/info 读取配置文件application.properties的 info.*属性

在InfoProperties 读取

application.properties :

info.app.version=v1.2.0
info.app.name=abc

在GitProperties 获取git.properties 的信息

info.app.version=v1.2.0
info.app.name=abc
#远程关闭开启
endpoints.shutdown.enabled=true  
#访问：http://localhost:8083/shutdown   关闭服务

metrics

{
mem: 573549,   //内存大小
mem.free: 388198,  //内存剩余大小
processors: 4,  //处理器数量
instance.uptime: 338426,
uptime: 345091,
systemload.average: -1,
heap.committed: 489984,
heap.init: 131072,
heap.used: 101785,
heap: 1842688,
nonheap.committed: 85056,
nonheap.init: 2496,
nonheap.used: 83566,
nonheap: 0,
threads.peak: 46,
threads.daemon: 36,
threads.totalStarted: 72,
threads: 39,  //线程
classes: 12109,
classes.loaded: 12109,  //加载的类
classes.unloaded: 0,  //没加载的类
gc.ps_scavenge.count: 10,
gc.ps_scavenge.time: 103,
gc.ps_marksweep.count: 3,
gc.ps_marksweep.time: 219,
httpsessions.max: -1,
httpsessions.active: 0,
gauge.response.mappings: 3,
gauge.response.autoconfig: 4,
gauge.response.trace: 167,
counter.status.200.mappings: 1,
counter.status.200.autoconfig: 2,
counter.status.200.trace: 1
}

自定义配置说明：

#关闭metrics功能
endpoints.metrics.enabled=false
#开启shutdown远程关闭功能
endpoints.shutdown.enabled=true
#设置beansId
endpoints.beans.id=mybean
#设置beans路径
endpoints.beans.path=/bean
#关闭beans 功能
endpoints.beans.enabled=false
#关闭所有的
endpoints.enabled=false 
#开启单个beans功能
endpoints.beans.enabled=true
#所有访问添加根目录
management.context-path=/manage
​
management.port=8181
​

org.springframework.boot.actuate.health 包下对于所有的健康状态检查例如：RedisHealthIndicator ，当有redis的starter 时候就会检查

 {
    status: "DOWN", //状态
    diskSpace: {
    status: "UP",
    total: 395243941888,
    free: 367246643200,
    threshold: 10485760
    },
    rabbit: {
    status: "DOWN",
    error: "org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection refused: connect"
    },
    redis: {
    status: "UP",
    version: "4.0.9"
    },
    db: {
    status: "UP",
    database: "MySQL",
    hello: 1
    }
}

自定义health

• 自定义健康状态指示器

• 1、编写一个指示器 实现 HealthIndicator 接口

• 2、指示器的名字 xxxxHealthIndicator

• 3、加入容器中

  import org.springframework.boot.actuate.health.Health;
  import org.springframework.boot.actuate.health.HealthIndicator;
  import org.springframework.stereotype.Component;
  @Component
  public class MyAppHealthIndicator implements HealthIndicator {
  ​
      @Override
      public Health health() {
  ​
          //自定义的检查方法
          //Health.up().build()代表健康
          return Health.down().withDetail("msg","服务异常").build();
      }
  }