SpringCloud2.0入门4-springboot-admin监控

前言

上一节为springboot项目添加springboot-admin监控 学习了基于springboot1.5自己注册到admin的方法。接下来学习结合Eureka使用以及2.0的改变。

1.5spring-boot-admin集成eureka

我们继续上一节的项目修改，admin-server依赖修改如下

<dependencies>
    <dependency>
      <groupId>de.codecentric</groupId>
      <artifactId>spring-boot-admin-starter-server</artifactId>
    </dependency>
    <dependency>
      <groupId>de.codecentric</groupId>
      <artifactId>spring-boot-admin-server-ui</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-eureka</artifactId>
    </dependency></dependencies><dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>${spring-cloud.version}</version>
            <type>pom</type>
            <scope>import</scope>
      </dependency>
    </dependencies></dependencyManagement>

修改启动类，添加

@EnableDiscoveryClient@EnableAdminServer

修改配置文件application.properties

server.port=8081spring.application.name=admin-server
eureka.client.serviceUrl.defaultZone=${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/management.security.enabled=false

注意，这里的eureka server要提前启动。具体细节，参见SpringCloud入门1-服务注册与发现(Eureka)

到这里就结束，可以直接启动。admin会自己拉取Eureka上注册的app信息，主动去注册。这也是唯一区别之前手动注册的地方，就是client端不需要admin-client的依赖，也不需要配置admin地址了，一切全部由admin-server自己实现。这样的设计对环境变化很友好，不用改了admin-server后去改所有app的配置了。

spring-boot-admin2.0的巨变

以为2.0比1.5区别不大，也确实不很大。关于client主动注册的部分没有变化。

这里，重新学习一遍，并添加上安全登录功能。

新建一个springboot项目

项目地址：

https://github.com/Ryan-Miao/spring-cloud-demo/tree/master/admin-server

添加spring-boot-admin-server, 最终pom依赖如下

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.2.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
    <spring-boot-admin.version>2.0.0</spring-boot-admin.version>
    <spring-cloud.version>Finchley.RC2</spring-cloud.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>de.codecentric</groupId>
      <artifactId>spring-boot-admin-starter-server</artifactId>
    </dependency>
    <!--还没有发布-->
    <!--<dependency>-->
      <!--<groupId>de.codecentric</groupId>-->
      <!--<artifactId>spring-boot-admin-server-cloud</artifactId>-->
    <!--</dependency>-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
   <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>
  </dependencies>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>de.codecentric</groupId>
        <artifactId>spring-boot-admin-dependencies</artifactId>
        <version>${spring-boot-admin.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version>${spring-cloud.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
        <executions>
          <execution>
            <goals>
              <goal>build-info</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

  <repositories>
    <repository>
      <id>central</id>
      <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
      <name>aliyun</name>
    </repository>
    <repository>
      <id>spring-milestones</id>
      <name>Spring Milestones</name>
      <url>https://repo.spring.io/milestone</url>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
    </repository>
  </repositories>

注意到里面添加spring cloud eureka的依赖，我们也把admin给注册到eureka。

这次的配置文件比较复杂

spring:  application:    name: admin-server  profiles:    active:      - secure# tag::configuration-eureka[]eureka:   #<1>  instance:    leaseRenewalIntervalInSeconds: 10    health-check-url-path: /actuator/health #2.0后actuator的地址发生了变化  client:    registryFetchIntervalSeconds: 5    serviceUrl:      defaultZone: ${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/# 2.0开始，actuator默认不开放，所以要设置为开放management:  endpoints:    web:      exposure:        include: "*"  #<2>  endpoint:    health:      show-details: ALWAYSserver:  port: 8081# end::configuration-eureka[]---spring:  profiles: insecure---# admin登录的用户名和密码spring:  profiles: secure  security:    user:      name: "user"      password: "password"# 注册给eureka的时候告诉eureka自己的密码eureka:  instance:    metadata-map:
      "user.name": ${spring.security.user.name}         #These two are needed so that the server
      "user.password": ${spring.security.user.password} #can access the protected client endpoints

首先，我们同时支持两种安全配置，一种没有安全认证，一种有。注意到前面的依赖pom里有security的依赖。针对security方案，需要配置用户名和密码。

其次，配置了eureka client相关参数，把自己注册到eureka里。

然后，关于actuator的端点接口，设置为全部开放。

最后，设置我们的用户名和密码，并把用户名和密码放到eureka里，方便识别。

配置security的安全过滤

最终的启动类如下

@EnableDiscoveryClient@EnableAdminServer@SpringBootApplicationpublic class AdminServerApplication {    public static void main(String[] args) {
        SpringApplication.run(AdminServerApplication.class, args);
    }    @Profile("insecure")    @Configuration
    public static class SecurityPermitAllConfig extends WebSecurityConfigurerAdapter {        @Override
        protected void configure(HttpSecurity http) throws Exception {
            http.authorizeRequests().anyRequest().permitAll()//
                .and().csrf().disable();
        }
    }    @Profile("secure")    @Configuration
    public static class SecuritySecureConfig extends WebSecurityConfigurerAdapter {        private final String adminContextPath;        public SecuritySecureConfig(AdminServerProperties adminServerProperties) {            this.adminContextPath = adminServerProperties.getContextPath();
        }        @Override
        protected void configure(HttpSecurity http) throws Exception {            // @formatter:off
            SavedRequestAwareAuthenticationSuccessHandler successHandler = new SavedRequestAwareAuthenticationSuccessHandler();
            successHandler.setTargetUrlParameter("redirectTo");

            http.authorizeRequests()
                .antMatchers(adminContextPath + "/assets/**").permitAll()
                .antMatchers(adminContextPath + "/login").permitAll()
                .anyRequest().authenticated()
                .and()
                .formLogin().loginPage(adminContextPath + "/login").successHandler(successHandler)
                .and()
                .logout().logoutUrl(adminContextPath + "/logout").and()
                .httpBasic().and()
                .csrf().disable();            // @formatter:on
        }
    }
}

和之前没啥不同，唯一的区别是添加了安全认证相关的，即采用secure模式的时候必须输入用户名和密码。

启动

我们启动并选择激活配置环境secure

访问localhost:8081

登录

详细页

界面确实比1.5好很多啊。

新建一个app来注册

依旧采用手动注册的方式，新建一个springboot项目，项目地址

https://github.com/Ryan-Miao/spring-cloud-demo/tree/master/provider-demo

首先，pom依赖要有eureka

<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.test</groupId>
  <artifactId>provider-demo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>provider-demo</name>
  <description>Demo project for Spring Boot</description>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.2.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
    <spring-cloud.version>Finchley.RC2</spring-cloud.version>
    <spring-boot-admin.version>2.0.0</spring-boot-admin.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>
    <dependency>
      <groupId>de.codecentric</groupId>
      <artifactId>spring-boot-admin-starter-client</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger2</artifactId>
      <version>2.7.0</version>
    </dependency>
    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger-ui</artifactId>
      <version>2.7.0</version>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
    </dependency>
  </dependencies>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version>${spring-cloud.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
      <dependency>
        <groupId>de.codecentric</groupId>
        <artifactId>spring-boot-admin-dependencies</artifactId>
        <version>${spring-boot-admin.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
        <executions>
          <execution>
            <goals>
              <goal>build-info</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

  <repositories>
    <repository>
      <id>central</id>
      <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
      <name>aliyun</name>
    </repository>
    <repository>
      <id>spring-milestones</id>
      <name>Spring Milestones</name>
      <url>https://repo.spring.io/milestone</url>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
    </repository>
  </repositories></project>

注意，配置了eureka，用来注册。

依赖springfox-swagger2用来展示API。

spring-boot-admin-starter-client才是主动注册的核心库，用来发送注册申请。

需要再次强调了是build

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
        <executions>
          <execution>
            <goals>
              <goal>build-info</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

这里是为了生成版本信息，提供给spring-boot-admin展示。

provider-demo的配置文件

eureka:  instance:    leaseRenewalIntervalInSeconds: 10    health-check-url-path: /actuator/health  client:    registryFetchIntervalSeconds: 5    serviceUrl:      defaultZone: ${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/management:  endpoints:    web:      exposure:        include: "*"  endpoint:    health:      show-details: ALWAYSserver:  port: 8082spring:  application:    name: provider-demo  boot:    admin:      client:        url: "http://localhost:8081"        password: password        username: user        instance:          prefer-ip: true

eureka的配置和admin-server相同，毕竟都是eureka的client嘛。不同的是这里没有开启spting security，所以不添加用户名和密码信息到meta-data里。

actuator同样需要暴露全部。

关于spring-boot-admin-client的注册配置里多了username和password，这个不是自己的，而是admin-server设置的，即前文的里的。

启动后就可以看到前面的详细信息了。

巨变在这里

在1.5版本里，我们只要加上eureka注册，就可以admin-server自动发现所有的app并自己注册监控了。但这里居然行不通了。我调试了几个小时，把依赖包翻来覆去研究了好多遍----就是不行！！！

无奈，只好去github把spring-boot-admin的源码下载下来，找到注册的代码开始追踪。我发现，根本没有提供任何和eureka注册中心相关的代码。看到了spring-boot-admin-server-cloud, 进去看了源码，这里有关于注册中心的监听代码，也就是admin自动发现app的密码所在。那我把这个加入dependency不就好了吗，太年轻。加上后发现找不到版本。我说不应该啊，我有导入dependencyManagement的pom啊。手动指定版本也不行。最后无奈的发现，原来根本没有发布！！！

Note: Since Spring Cloud Finchley is not released yet, this version doesn't include Spring Cloud Discovery support

所以，手动注册吧，骚年。不然你再等等。

结语

通过这一下午的尝试，追踪源码，我发现自己确实挺乐在其中的。然而，这花费了大量的时间和精力。所以，我花费了更多的时间一定要把这次经历记录下来，也就是本文了。想说的是，最新的版本果然是坑巨多，慎入！！！如果是作为生产环境的选型，必须跳过这样的版本。当然，如果是自己个人研究，看新的没错。

那么，我到底应不应该学习2.0呢，毕竟1.5也没学完呢。

学吧，按2.0的学习，工作中还是用1.5. 嗯，就这样吧。

Miao语

没有解决不了的bug，只要你用心研究，都可以解决。

参考

• Spring-boot-admin-server-cloud没有发布的肯人issue

• Spring-boot-admin-server2.0发布Note

• Spring-boot-admin官方文档

原文出处：SpringCloud2.0入门4-springboot-admin监控

• 本文作者：@Ryan Miao