Spring Boot (28) actuator与spring-boot-admin

在上一篇中，通过restful api的方式查看信息过于繁琐，也不直观，效率低下。当服务过多的时候看起来就过于麻烦，每个服务都需要调用不同的接口来查看监控信息。

SBA

　　SBA全称spring boot admin 是一个管理和监控spring boot 应用程序的开源项目，分为admin-server与admin-client两个组件，admin-server通过采集actuator端点数据，显示在spring -boot-admin-ui上，已知的端点几乎都有进行采集，通过spring-boot-admin可以动态切换日志级别、导出日志、导出heapdump、监控各项指标 等等

spring boot admin在对单一服务监控的同时也提供了集群监控方案，支持通过eureka、consul、zookeeper等注册中心的方式实现多服务监控与管理

导入依赖

　　在pom.xml中添加对spring-boot-admin的相关依赖

<!-- 服务端：带UI界面 -->
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
            <version>2.0.0</version>
        </dependency>
        <!-- 客户端包 -->
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-client</artifactId>
            <version>2.0.0</version>
        </dependency>
        <!-- 安全认证 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <!-- 端点 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!-- 在管理界面中与 JMX-beans 进行交互所需要被依赖的 JAR -->
        <dependency>
            <groupId>org.jolokia</groupId>
            <artifactId>jolokia-core</artifactId>
        </dependency>

如果想访问info的信息需要如下配置

    <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>

属性配置

　　在application.yml中配置actuator的相关配置，其中info开头的属性，就是访问info端点中显示的相关内容，值得注意的十spring boot2.x中，默认只开放了info、health两个端点，剩余的需要自己通过配置management.endpoints.web.exposure.include属性来加载，这个management.endpoints.web.base-path属性比较重要，因为spring boot2.x后每个端点默认的路径是/actuator/endpointId这样依赖spring boot admin是无法正常采集的

application.yml

spring:
  profiles:
    active: prod #指定读取哪个文件
  boot:
    admin:
      client:
        url: http://localhost:8088
        instance:
          prefer-ip: true

info:
  head: head
  body: body
management:
  endpoints:
    web:
      exposure:
        #加载所有的端点，默认只加载了info、health
        include: '*'
      #不配置SBA 扫描不到
      base-path: /
  endpoint:
    health:
      show-details: always
    #可以关闭指定的端点
    shutdown:
      enabled: false

application-dev.yml 空的

application-prod.yml

server:
  port: 8088
  servlet:
    context-path: /

spring:
  boot:
    admin:
      client:
        username: david
        password: 123456
        instance:
          metadata:
            user:
              name: david
              password: 123456
  security:
    user:
      name: david
      password: 123456

在启动方法中增加@EnableAdminServer注解 代表是Server端

@EnableAdminServer
@SpringBootApplication
public class BootApplication{

    public static void main(String[] args) {
        SpringApplication.run(BootApplication.class,args);
    }

    @Profile("dev")
    @Configuration
    public static class SecurityPermitAllConfig extends WebSecurityConfigurerAdapter{
        @Override
        protected void configure(HttpSecurity http) throws Exception{
            http.authorizeRequests().anyRequest().permitAll().and().csrf().disable();
        }
    }

    @Profile("prod")
    @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{
            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();
        }
    }
}

测试

启动项目 访问 http://localhost:8088/login