服务监控之 Spring Boot Admin.

一、概述

 开始阅读这篇文章之前,建议先阅读下《SpringBoot 之Actuator》,该篇文章提到 Spring Boot Actuator 提供了对单个Spring Boot的监控,信息包含:应用状态、内存、线程、堆栈等等,比较全面的监控了Spring Boot应用的整个生命周期。但是美中不足的是:

  1. 所有的监控都需要调用固定的接口来查看,如果全面查看应用状态需要调用很多接口,并且接口返回的 Json 信息不方便运营人员理解;
  2. 如果Spring Boot 应用集群非常大,每个应用都需要调用不同的接口来查看监控信息,操作非常繁琐低效。

 在这样的背景下,就诞生了另外一个开源软件:Spring Boot Admin。那么什么是 Spring Boot Admin 呢?Spring Boot Admin 是一个针对 Spring Boot Actuator 进行UI美化封装的监控工具。集群的每个应用都认为是一个客户端(或者说实例),通过HTTP或者使用 Eureka 注册到 Spring Boot Admin Server中进行展示,Spring Boot Admin UI 使用AngularJs将数据展示在前端。

 下面将给大家介绍如何使用Spring Boot Admin对Spring Boot应用进行监控。

二、spring-boot-admin-starter-server

下面介绍 spring-boot-admin-server 的构建,要监控的每个客户端(或者说实例),都可以把 Actuator 数据注册到 server 中进行 UI 渲染展示。

1. pom.xml

        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
            <version>2.1.5</version>
        </dependency>

2. application.yml

server:
  port: 3333

spring:
  application:
    name: monitor

3. Application.java

@SpringBootApplication
@EnableAdminServer
public class Application {

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

做完以上动作,我们一个 spring-boot-admin-server 项目就搭建好了。以下是一些附加的功能:权限认证和邮件预警。

4. 配置 spring-security 权限验证

  • pom.xml
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-server-ui-login</artifactId>
            <version>1.5.7</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
  • application.yml
security:
  user:
    name: ${monitor.user}
    password: ${monitor.password}
  • SecurityConfig.java
@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        // Page with login form is served as /login.html and does a POST on /login
        http.formLogin().loginPage("/login.html").loginProcessingUrl("/login").permitAll();
        // The UI does a POST on /logout on logout
        http.logout().logoutUrl("/logout");
        // The ui currently doesn't support csrf
        http.csrf().disable();

        // Requests for the login page and the static assets are allowed
        //允许登录页面和静态资源的请求
        http.authorizeRequests().antMatchers("/login.html", "/**/*.css", "/img/**", "/third-party/**")
                .permitAll();
        // ... and any other request needs to be authorized
        //这点重要:所有请求都需要认证
        http.authorizeRequests().antMatchers("/**").authenticated();

        // Enable so that the clients can authenticate via HTTP basic for registering
        http.httpBasic();
    }
}
  • 效果

5、邮件预警

  • pom.xml
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
            <version>1.5.12.RELEASE</version>
        </dependency>
  • application.yml
spring:
  mail:
    host: smtp.exmail.qq.com
    port: 465
    username: xxx
    password: xxx
    properties:
      mail:
        smtp:
          auth: true
          debug: true
          timeout: 0
          socketFactory:
            port: 465
            class: javax.net.ssl.SSLSocketFactory
  • NotifierConfig.java
/**
 * 重新配置消息通知
 *
 * @author : cuixiuyin
 */
@Configuration
@EnableScheduling
public class NotifierConfig {
    private static final Logger log = LoggerFactory.getLogger(NotifierConfig.class);

    @Autowired
    private JavaMailSender javaMailSender;

    @Autowired
    private RemindingNotifier remindingNotifier;

    @Bean
    @Primary
    public RemindingNotifier remindingNotifier() {

        RemindingNotifier remindingNotifier = new RemindingNotifier(new AbstractEventNotifier() {

            @Override
            protected void doNotify(ClientApplicationEvent event) throws Exception {
                if (event instanceof ClientApplicationStatusChangedEvent) {
                    ClientApplicationStatusChangedEvent changedEvent = (ClientApplicationStatusChangedEvent) event;
                    log.info("Application {} ({}) is {}", event.getApplication().getName(), event.getApplication().getId(), changedEvent.getTo().getStatus());
                    String text = String.format("应用:%s 服务ID:%s,服务ip:%s 状态改变为:[%s ---> %s],时间:%s"
                            , event.getApplication().getName()
                            , event.getApplication().getId()
                            , event.getApplication().getHealthUrl()
                            , changedEvent.getFrom().getStatus()
                            , changedEvent.getTo().getStatus()
                            , new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(changedEvent.getTimestamp())));
                    log.warn(text);
                    SimpleMailMessage message = new SimpleMailMessage();
                    message.setFrom("xxx@qq.com");
                    message.setTo("xxx@163.com");
                    message.setSubject(event.getApplication().getName() + "服务状态改变");
                    message.setText(text);
                    javaMailSender.send(message);
                } else {
                    log.info("Application {} ({}) {}", event.getApplication().getName(), event.getApplication().getId(), event.getType());
                }
            }
        });
        // 每5分钟就需要提醒一次,并不一定会提醒,有 RemindingNotifier 里面的状态进行决定
        remindingNotifier.setReminderPeriod(TimeUnit.MINUTES.toMillis(5));
        return remindingNotifier;
    }

    /**
     * 每隔一分钟检查还有那些需要进行提醒
     */
    @Scheduled(fixedRate = 1_000L)
    public void remind() {
        remindingNotifier.sendReminders();
    }
}
  • 效果

三、spring-boot-admin-starter-client

我们已经有了一个 spring-boot-admin-server,现在要做的就是如何把客户端(或者说实例)的 Actuator 数据注册到 Server 中。

1. pom.xml

        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-client</artifactId>
            <version>2.1.5</version>
        </dependency>

2. application.yml

spring:
  application:
    name: dubbo-provider
  boot:
    admin:
      enabled: true
      client:
        instance:
          name: ${spring.application.name}
          prefer-ip: true
        url: http://127.0.0.1:3333
management:
  endpoints:
    web:
      exposure:
        include: '*'

如此,我们就把客户端(或者说实例)的 Actuator 数据注册到 Server 中了。

附录

1. 效果图


2.源代码地址

Github 演示代码地址:https://github.com/JMCuixy/dubbo-demo

posted @ 2019-06-15 08:55  JMCui  阅读(2182)  评论(0编辑  收藏  举报