SpringBoot实现监控Actuator,关闭redis监测

SpringBoot监控Actuator,关闭redis监测

方法

当我们导入了spring-boot-starter-actuator这个依赖后, SpringBoot会默认去监测一些信息。其中就包括redis、 会根据redis的默认初始配置， localhost:6379 尝试连接redis。如果我们没有用到redis， 启动就会报错

 <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
      <version>2.2.1.RELEASE</version>
   </dependency>

比如我在使用SpringBootAdmin的时候，其中内置了Actuator的依赖， 启动报错

[WARN ] 2020-05-28 09:28:17.179 [registrationTask1] de.codecentric.boot.admin.client.registration.ApplicationRegistrator - Failed to register application as Application(name=admin-client, managementUrl=http://Gordon-pc:8768/actuator, healthUrl=http://Gordon-pc:8768/actuator/health, serviceUrl=http://Gordon-pc:8768/) at spring-boot-admin ([http://localhost:8769/instances]): I/O error on POST request for "http://localhost:8769/instances": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect. Further attempts are logged on DEBUG level
[WARN ] 2020-05-28 09:28:19.075 [boundedElastic-1] org.springframework.boot.actuate.redis.RedisReactiveHealthIndicator - Redis health check failed
org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to localhost:6379
at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getNativeConnection(LettuceConnectionFactory.java:1200)
at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getConnection(LettuceConnectionFactory.java:1179)
at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.getSharedReactiveConnection(LettuceConnectionFactory.java:952)
at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.getReactiveConnection(LettuceConnectionFactory.java:429)
at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.getReactiveConnection(LettuceConnectionFactory.java:94)
at reactor.core.publisher.MonoSupplier.call(MonoSupplier.java:85)
at reactor.core.publisher.FluxSubscribeOnCallable$CallableSubscribeOnSubscription.run(FluxSubscribeOnCallable.java:225)
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:68)
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:28)
at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
at java.util.concurrent.FutureTask.run(FutureTask.java)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: io.lettuce.core.RedisConnectionException: Unable to connect to localhost:6379
at io.lettuce.core.RedisConnectionException.create(RedisConnectionException.java:78)
at io.lettuce.core.RedisConnectionException.create(RedisConnectionException.java:56)
at io.lettuce.core.AbstractRedisClient.getConnection(AbstractRedisClient.java:234)
at io.lettuce.core.RedisClient.connect(RedisClient.java:207)
at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.lambda$getConnection$1(StandaloneConnectionProvider.java:115)
at java.util.Optional.orElseGet(Optional.java:267)
at org.springframework.data.redis.connection.lettuce.StandaloneConnectionProvider.getConnection(StandaloneConnectionProvider.java:115)
at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getNativeConnection(LettuceConnectionFactory.java:1198)
... 15 common frames omitted

在网上搜了下解决方法， 发现都是提供的这一种方式：

@Component("redisHealthIndicator")
public class RedisHealthIndicator implements HealthIndicator {

    @Override
    public Health health() {
        return Health.up().build();
    }    
}

结果我在看配置文件的时候, 发现另一个简单的方式: application.yml中加上

management:
  health:
    redis:
      enabled: false

就可以了~

springboot Actuator

通过Actuator可以深入的了解springboot应用程序的内部， 可以进行监控和度量一些配置信息。

这些特性可以通过rest端点、远程shell和jmx获得。

以下主要探讨rest端点的使用。

查看配置明细

1）/beans 上下文bean的情况

查看spring上下文中bean的情况， /beans会返回一个json文档，描述上下文里每个Bean的情况，类型、依赖注入

2）/autoconfig 自动配置情况

positiveMatches指定的自动配置表示匹配成功的bean
negativeMatches对应的自动配置表示匹配失败的bean

3）/env 查看配置属性

包括：环境变量、JVM属性、命令行参数，以及application.properties或application.yml文件提供的属性

运行时度量

对运行时度量情况作一个快照，以此检查应用程序的健康状况。

1）/metrics 应用程序的度量值

2）/trace 跟踪web请求的所有信息

包括请求方法、路径、时间戳，以及请求和响应的头信息。

3）/health 健康检查器

可以检查应用程序启动状况，以及相关依赖中间件的连接状态。

以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。

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