• github地址: https://github.com/codecentric/spring-boot-admin
• 文档地址：https://codecentric.github.io/spring-boot-admin/current/

在项目中使用SpringBootAdmin分为两部分: 服务端与客户端。客户端通过http的方式向服务端提供自生的运行状况

• 版本: <spring.boot.admin.version>2.1.6</spring.boot.admin.version>

1. 构建服务端项目

• 服务端依赖

             <dependency>
                <groupId>de.codecentric</groupId>
                <artifactId>spring-boot-admin-starter-server</artifactId>
                <version>${spring.boot.admin.version}</version>
            </dependency>

• 启动类上标记注解@EnableAdminServer
• 设置端口

server:
  port: 8080

• 启动即可

如果有报错:

2019-11-02 09:50:14.924 ERROR 55391 --- [nio-8080-exec-2] o.a.catalina.connector.CoyoteAdapter     : Exception while processing an asynchronous request

java.lang.IllegalStateException: Calling [asyncError()] is not valid for a request with Async state [MUST_DISPATCH]
    at org.apache.coyote.AsyncStateMachine.asyncError(AsyncStateMachine.java:440) ~[tomcat-embed-core-9.0.16.jar:9.0.16]
    at org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:512) [tomcat-embed-core-9.0.16.jar:9.0.16]
    at org.apache.coyote.Request.action(Request.java:430) ~[tomcat-embed-core-9.0.16.jar:9.0.16]
    at org.apache.catalina.core.AsyncContextImpl.setErrorState(AsyncContextImpl.java:396) ~[tomcat-embed-core-9.0.16.jar:9.0.16]
    at org.apache.catalina.connector.CoyoteAdapter.asyncDispatch(CoyoteAdapter.java:239) ~[tomcat-embed-core-9.0.16.jar:9.0.16]
    at org.apache.coyote.AbstractProcessor.dispatch(AbstractProcessor.java:241) [tomcat-embed-core-9.0.16.jar:9.0.16]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:53) [tomcat-embed-core-9.0.16.jar:9.0.16]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834) [tomcat-embed-core-9.0.16.jar:9.0.16]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415) [tomcat-embed-core-9.0.16.jar:9.0.16]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.16.jar:9.0.16]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_191]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_191]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.16.jar:9.0.16]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_191]

• 则将Tomcat换成jetty

 <dependencies>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>
    </dependencies>

完整项目源代码在 https://github.com/FutaoSmile/LazyStarter/tree/master/lazy-admin

2. 客户端-需要被监控的服务

• 添加客户端依赖

       <dependency>
            <groupId>org.jolokia</groupId>
            <artifactId>jolokia-core</artifactId>
        </dependency>
        <!-- https://codecentric.github.io/spring-boot-admin/2.1.6/#getting-started-->
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-client</artifactId>
            <version>2.1.6</version>
        </dependency>

• 配置SpringBootAdmin服务端的地址

spring:
    boot:
        admin:
          client:
            url: http://localhost:8080

management:
  endpoints:
    web:
      exposure:
        include: "*"
  endpoint:
    health:
      show-details: always

• 启动SpringBoot客户端项目
• 访问服务端配置的地址：http://localhost:8080
  
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• 如果没有数据，像下面这样

  
  
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  这是因为你的SpringBoot项目封装了监控端点返回的数据，从Info返回的数据结构可以看出。

• 解决方案是，不要让SpringBoot封装监控端点返回的数据
• 如果使用的是@RestControllerAdvice则约束一下包路径@RestControllerAdvice("com.west.lake.blog.controller")

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• 请求日志与请求耗时监控

  
  
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• 缓存管理器

  
  
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