详解spring-boot actuator（监控）配置和使用

在生产环境中，需要实时或定期监控服务的可用性。spring-boot 的actuator（监控）功能提供了很多监控所需的接口。简单的配置和使用如下：

1、引入依赖：

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

如果使用http调用的方式，还需要这个依赖：

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

2、配置：

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: 8082 
management: 
 port: 54001 
 health: 
  mail: 
   enabled: false 

3、使用：

查看health指标：http://localhost:54001/health

{"status":"up","diskspace":{"status":"up","total":120031539200,"free":33554337792,"threshold":10485760},"db":{"status":"up","datasource1":{"status":"up","database":"mysql","hello":1},"datasource2":{"status":"up","database":"mysql","hello":1}}} 

4、自定义指标：

4.1 /health：在某个类中implements healthindicator接口，然后实现其中的health()方法即可：

代码：

@springbootapplication 
@enablescheduling 
public class myspringbootapplication implements healthindicator{ 
  private static logger logger = loggerfactory.getlogger(myspringbootapplication.class); 
   
  public static void main(string[] args) { 
    springapplication.run(myspringbootapplication.class, args); 
    logger.info("my spring boot application started"); 
  } 
 
  /** 
   * 在/health接口调用的时候，返回多一个属性："myspringbootapplication":{"status":"up","hello":"world"} 
   */ 
  @override 
  public health health() { 
    return health.up().withdetail("hello", "world").build(); 
  } 
} 

/health 运行结果（注意第二个指标）：

{"status":"up","myspringbootapplication":{"status":"up","hello":"world"},"diskspace":{"status":"up","total":120031539200,"free":33554337792,"threshold":10485760},"db":{"status":"up","datasource1":{"status":"up","database":"mysql","hello":1},"datasource2":{"status":"up","database":"mysql","hello":1}}}

4.2 /info：配置如下，可以直接给一个字符串，也可以从pom.xml配置中获取

info: 
 app: 
  name: "@project.name@" #从pom.xml中获取 
  description: "@project.description@" 
  version: "@project.version@" 
  spring-boot-version: "@project.parent.version@" 

/info的结果如下：

{"app":{"name":"my-spring-boot","description":"test project for spring boot","version":"1.0","spring-boot-version":"1.3.6.release"}}

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