<span>Spring Cloud Admin健康检查邮件、钉钉群通知</span>

源码地址：https://github.com/muxiaonong/Spring-Cloud/tree/master/cloudadmin

Admin 简介

SpringBootAdmin是一个用于管理和监控SpringBoot微服务的社区项目，可以使用客户端注册或者Eureka服务发现向服务端提供监控信息。
注意，服务端相当于提供UI界面，实际的监控信息由客户端Actuator提供
通过SpringBootAdmin，你可以通过华丽大气的界面访问到整个微服务需要的监控信息，例如服务健康检查信息、CPU、内存、操作系统信息等等

本篇文章使用SpringBoot 2.3.3.RELEASE、SpringCloud Hoxton.SR6、SpringBoot Admin 2.2.3版本，此外，服务注册中心采用eureka

一、SpringCloud使用SpringBoot Admin

1.1 创建一个SpringBoot项目，命名为admin-test，引入如下依赖

 <!-- Admin 服务 -->
  <dependency>
      <groupId>de.codecentric</groupId>
      <artifactId>spring-boot-admin-starter-server</artifactId>
      <version>2.2.1</version>
  </dependency>
  <!-- Admin 界面 -->
  <dependency>
      <groupId>de.codecentric</groupId>
      <artifactId>spring-boot-admin-server-ui</artifactId>
      <version>2.2.1</version>
  </dependency>

1.2 启动类

@SpringBootApplication
@EnableAdminServer
public class AdminTestApplication {

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

1.3 配置文件

spring.application.name=admin-test

management.endpoints.jmx.exposure.include=*
management.endpoints.web.exposure.include=*
management.endpoint.health.show-details=always

# spring cloud access&secret config
alibaba.cloud.access-key=****
alibaba.cloud.secret-key=****

1.4 启动项目

输入项目地址：http://localhost:8080/applications

二、配置邮件通知

2.1 pom

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-mail</artifactId>
</dependency>

2.2 邮件配置

spring.mail.host=smtp.qq.com
spring.mail.username=单纯QQ号
spring.mail.password=授权码
spring.mail.properties.mail.smpt.auth=true
spring.mail.properties.mail.smpt.starttls.enable=true
spring.mail.properties.mail.smpt.starttls.required=true

#收件邮箱
spring.boot.admin.notify.mail.to=xxxx@qq.com
# 发件邮箱
spring.boot.admin.notify.mail.from= xxxx@qq.com

2.3 QQ邮箱设置

找到自己的QQ邮箱

QQ邮箱》设置》账户》红框处获取授权码

我们将 consumer 服务下线后，

接着我们就收到了邮件通知，告诉我们服务关闭了

三、发送钉钉群通知

找到群里面的群设置》智能群助手》添加机器人

注意：这里的自定义关键词一定要和项目的关键字匹配

获取 Webhook 到项目中，这个是后面要使用到的

启动类：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

import de.codecentric.boot.admin.server.config.EnableAdminServer;
import de.codecentric.boot.admin.server.domain.entities.InstanceRepository;

@SpringBootApplication
@EnableAdminServer
public class AdminApplication {

	public static void main(String[] args) {
		SpringApplication.run(AdminApplication.class, args);
	}
	   @Bean
	    public DingDingNotifier dingDingNotifier(InstanceRepository repository) {
	        return new DingDingNotifier(repository);
	    }
}

通知类：

import java.util.Map;

import com.alibaba.fastjson.JSONObject;

import de.codecentric.boot.admin.server.domain.entities.Instance;
import de.codecentric.boot.admin.server.domain.entities.InstanceRepository;
import de.codecentric.boot.admin.server.domain.events.InstanceEvent;
import de.codecentric.boot.admin.server.notify.AbstractStatusChangeNotifier;
import reactor.core.publisher.Mono;

public class DingDingNotifier extends AbstractStatusChangeNotifier  {
	public DingDingNotifier(InstanceRepository repository) {
        super(repository);
    }
    @Override
    protected Mono<Void> doNotify(InstanceEvent event, Instance instance) {
        String serviceName = instance.getRegistration().getName();
        String serviceUrl = instance.getRegistration().getServiceUrl();
        String status = instance.getStatusInfo().getStatus();
        Map<String, Object> details = instance.getStatusInfo().getDetails();
        StringBuilder str = new StringBuilder();
        str.append("服务预警 : 【" + serviceName + "】");
        str.append("【服务地址】" + serviceUrl);
        str.append("【状态】" + status);
        str.append("【详情】" + JSONObject.toJSONString(details));
        return Mono.fromRunnable(() -> {
            DingDingMessageUtil.sendTextMessage(str.toString());
        });
    }
}

发送工具类

import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import com.alibaba.fastjson.JSONObject;

public class DingDingMessageUtil {
	public static String access_token = "Token";
    public static void sendTextMessage(String msg) {
        try {
            Message message = new Message();
            message.setMsgtype("text");
            message.setText(new MessageInfo(msg));
            URL url = new URL("https://oapi.dingtalk.com/robot/send?access_token=" + access_token);
            // 建立 http 连接
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Charset", "UTF-8");
            conn.setRequestProperty("Content-Type", "application/Json; charset=UTF-8");
            conn.connect();
            OutputStream out = conn.getOutputStream();
            String textMessage = JSONObject.toJSONString(message);
            byte[] data = textMessage.getBytes();
            out.write(data);
            out.flush();
            out.close();
            InputStream in = conn.getInputStream();
            byte[] data1 = new byte[in.available()];
            in.read(data1);
            System.out.println(new String(data1));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

消息类：

public class Message {
	private String msgtype;
    private MessageInfo text;
    public String getMsgtype() {
        return msgtype;
    }
    public void setMsgtype(String msgtype) {
        this.msgtype = msgtype;
    }
    public MessageInfo getText() {
        return text;
    }
    public void setText(MessageInfo text) {
        this.text = text;
    }
}

public class MessageInfo {
    private String content;
    public MessageInfo(String content) {
        this.content = content;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
}

我们下线一个服务后，就可以看到钉钉群就发了消息的通知