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

在上一篇中，通過restful api的方式查看信息過於繁瑣，也不直觀，效率低下。當服務過多的時候看起來就過於麻煩，每個服務都需要調用不同的接口來查看監控信息。

 

SBA

　　SBA全稱spring boot admin 是一個管理和監控spring boot 應用程序的開源項目，分為admin-server與admin-client兩個組件，admin-server通過采集actuator端點數據，顯示在spring -boot-admin-ui上，已知的端點幾乎都有進行采集，通過spring-boot-admin可以動態切換日志級別、導出日志、導出heapdump、監控各項指標 等等

spring boot admin在對單一服務監控的同時也提供了集群監控方案，支持通過eureka、consul、zookeeper等注冊中心的方式實現多服務監控與管理

 

導入依賴

　　在pom.xml中添加對spring-boot-admin的相關依賴

<!-- 服務端：帶UI界面 -->
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
            <version>2.0.0</version>
        </dependency>
        <!-- 客戶端包 -->
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-client</artifactId>
            <version>2.0.0</version>
        </dependency>
        <!-- 安全認證 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <!-- 端點 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!-- 在管理界面中與 JMX-beans 進行交互所需要被依賴的 JAR -->
        <dependency>
            <groupId>org.jolokia</groupId>
            <artifactId>jolokia-core</artifactId>
        </dependency>

如果想訪問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>

 

屬性配置

　　在application.yml中配置actuator的相關配置，其中info開頭的屬性，就是訪問info端點中顯示的相關內容，值得注意的十spring boot2.x中，默認只開放了info、health兩個端點，剩余的需要自己通過配置management.endpoints.web.exposure.include屬性來加載，這個management.endpoints.web.base-path屬性比較重要，因為spring boot2.x后每個端點默認的路徑是/actuator/endpointId這樣依賴spring boot admin是無法正常采集的

application.yml

spring:
  profiles:
    active: prod #指定讀取哪個文件
  boot:
    admin:
      client:
        url: http://localhost:8088
        instance:
          prefer-ip: true

info:
  head: head
  body: body
management:
  endpoints:
    web:
      exposure:
        #加載所有的端點，默認只加載了info、health
        include: '*'
      #不配置SBA 掃描不到
      base-path: /
  endpoint:
    health:
      show-details: always
    #可以關閉指定的端點
    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

 

在啟動方法中增加@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();
        }
    }
}

 

測試

啟動項目 訪問 http://localhost:8088/login