springboot干货——自定义健康检查指标

Dear 丶 2021-09-23 10:12 927阅读 0赞

**[springboot——汇总篇][springboot]**

# 前言 #

在系统运行过程中我们需要监控系统运行是否正常，而有时因为系统或者需求的特殊之处，我们需要自定义相关健康指标用以监测我们的系统。本篇博客主要带大家了解下相关内容，不做深入探讨，有兴趣的可以百度。

健康检查有两种方式查看，一种是http，另一种是JMX，http方式很好理解，JMX一般可以用jdk的bin目录下的jconsole工具

YES表示默认使用，NO表示默认不使用，N/A表示不支持

JMX和Http不是互斥的关系，是两种访问途径

## 端点 ##

<table style="width:566px;"> 
 <tbody> 
  <tr> 
   <td>ID</td> 
   <td style="width:139px;">JMX</td> 
   <td style="width:139px;">Http</td> 
  </tr> 
  <tr> 
   <td>auditevents</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>beans</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>caches</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>conditions</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>configprops</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>env</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>flyway</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>health</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">Yes</td> 
  </tr> 
  <tr> 
   <td>heapdump</td> 
   <td style="width:139px;">N/A</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>httptrace</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>info</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">Yes</td> 
  </tr> 
  <tr> 
   <td>integrationgraph</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>jolokia</td> 
   <td style="width:139px;">N/A</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>logfile</td> 
   <td style="width:139px;">N/A</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>loggers</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>liquibase</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>metrics</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>mappings</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>prometheus</td> 
   <td style="width:139px;">N/A</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>scheduledtasks</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>sessions</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>shutdown(默认不开启)</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
  <tr> 
   <td>threaddump</td> 
   <td style="width:139px;">Yes</td> 
   <td style="width:139px;">No</td> 
  </tr> 
 </tbody> 
</table>

### 1.开启指定endpoint ###

此处的$\{id\}代表上述的真实id

management.endpoint.${id}.enabled
    一般只需要开启shutdown（其他都是默认开启的）
    management.endpoint.shutdown.enabled=true

### 2.关闭所有endpoint ###

这个一般和上面搭配使用，来自定义端点的开启

management.endpoints.enabled-by-default=false

## 修改暴露端点 ##

<table style="width:500px;"> 
 <tbody> 
  <tr> 
   <td>Property</td> 
   <td>Default</td> 
  </tr> 
  <tr> 
   <td>management.endpoints.jmx.exposure.exclude</td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>management.endpoints.jmx.exposure.include</td> 
   <td>*</td> 
  </tr> 
  <tr> 
   <td>management.endpoints.web.exposure.exclude</td> 
   <td>&nbsp;</td> 
  </tr> 
  <tr> 
   <td>management.endpoints.web.exposure.include</td> 
   <td>info, health</td> 
  </tr> 
 </tbody> 
</table>

include属性列出暴露端点的IDS,exclude属性列出不应该暴露端点的IDS；**exclude属性的优先级高于include属性**，include和exclude属性都可以使用端点列表来配置IDS.

### 1.JMX只公开部分端点 ###

停止公开所有在JMX上公开的端点，只公开info和health两个端点

management.endpoints.jmx.exposure.include=health,info

### 2.HTTP公开部分之外的所有端点 ###

\* 可以用来表示所有的端点，例如，通过HTTP公开所有的端点，除了env和beans端点

management.endpoints.web.exposure.include=*
    management.endpoints.web.exposure.exclude=env,beans

### 3.注意 ###

**\* 在YAML中有特殊的含义，所以如果想使用include或者exclude包含所有的端点时要加上双引号**

management:
      endpoints:
        web:
          exposure:
            include: "*"

# 代码 #

## 1.pom.xml ##

在一般的pom文件中加入如下依赖即可

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

## 2.application.properties ##

spring.jpa.hibernate.ddl-auto=none
    spring.jpa.properties.hibernate.show_sql=true
    spring.jpa.properties.hibernate.format_sql=true
    
    management.endpoints.web.exposure.include=*
    
    #展示细节，除了always之外还有when-authorized、never，默认值是never
    management.endpoint.health.show-details=always
    
    
    #设置端口号，如果不希望通过HTTP公开端点，则可以将管理端口设置为-1
    #management.server.port=-1
    management.server.port=8081
    #修改访问地址
    management.server.address=127.0.1.1
    #修改端点的前缀，将/actuator/{id}更改为/manage/{id}
    management.endpoints.web.base-path=/manage
    
    #/actuator/info中相关信息
    info.app.author=DigitalSonic
    info.app.encoding=@project.build.sourceEncoding@

## 3.自定义健康检查逻辑 ##

具体service的代码我就不贴出来了，具体的逻辑看具体业务，这边只是去数据库查询数据，对于其他业务没有任何意义

import geektime.spring.springbucks.waiter.service.CoffeeService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.actuate.health.Health;
    import org.springframework.boot.actuate.health.HealthIndicator;
    import org.springframework.stereotype.Component;
    
    @Component
    public class CoffeeIndicator implements HealthIndicator {
        @Autowired
        private CoffeeService coffeeService;
    
        @Override
        public Health health() {
            long count = coffeeService.getCoffeeCount();
            Health health;
            if (count > 0) {
                health = Health.up()
                        .withDetail("count", count)
                        .withDetail("message", "We have enough coffee.")
                        .build();
            } else {
                health = Health.down()
                        .withDetail("count", 0)
                        .withDetail("message", "We are out of coffee.")
                        .build();
            }
            return health;
        }
    }

## 4.结果验证 ##

a.打开[http://127.0.1.1:8081/manage][http_127.0.1.1_8081_manage]显示如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2d3ZDExNTQ5NzgzNTI_size_16_color_FFFFFF_t_70][]

b.打开[http://127.0.1.1:8081/manage/health][http_127.0.1.1_8081_manage_health]显示如下

此处包含了我们自定义的健康检查

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2d3ZDExNTQ5NzgzNTI_size_16_color_FFFFFF_t_70 1][]

c.打开[http://127.0.1.1:8081/manage/info][http_127.0.1.1_8081_manage_info]显示info相关信息

![20191028231129105.jpg][]

[springboot]: https://blog.csdn.net/gwd1154978352/article/details/80651332
[http_127.0.1.1_8081_manage]: http://127.0.1.1:8081/manage
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2d3ZDExNTQ5NzgzNTI_size_16_color_FFFFFF_t_70]: /images/20210923/9719aec7f03849a4b0f78c94e345ec38.png
[http_127.0.1.1_8081_manage_health]: http://127.0.1.1:8081/manage/health
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2d3ZDExNTQ5NzgzNTI_size_16_color_FFFFFF_t_70 1]: /images/20210923/ed2cf3c922624298be441960ab11e18b.png
[http_127.0.1.1_8081_manage_info]: http://127.0.1.1:8081/manage/info
[20191028231129105.jpg]: /images/20210923/d448aa8d03cb496baf7c412bea11ebac.png