Spring Boot Admin 集成自定義監控告警

Spring Boot Admin 集成自定義監控告警

前言

Spring Boot Admin 是一個社區項目,能夠用來監控和管理 Spring Boot 應用而且提供 UI,詳細能夠參考 官方文檔java

Spring Boot Admin 自己提供監控告警功能,可是默認只提供了 Hipchat、Slack 等國外流行的通信軟件的集成,雖然也有郵件通知,不過考慮到使用體檢決定二次開發增長 釘釘 通知。git

本文基於 Spring Boot Admin 目前最新版 1.5.7。github

準備工做

  1. Spring Boot Admin Server,參考文檔 http://codecentric.github.io/spring-boot-admin/1.5.7/#getting-started
  2. 釘釘自定義機器人,參考文檔 https://ding-doc.dingtalk.com/doc#/serverapi2/qf2nxq

參考自帶通知源碼

因爲官方文檔上並無增長自定義通知相關的文檔,因此咱們參考一下 Slack 通知源碼 SlackNotifier.javaweb

源碼比較長就不所有貼了,看一下關鍵部分:spring

public class SlackNotifier extends AbstractStatusChangeNotifier
protected void doNotify(ClientApplicationEvent event) throws Exception {
    this.restTemplate.postForEntity(this.webhookUrl, this.createMessage(event), Void.class);
}

能夠看到流程仍是比較簡單的,繼承 AbstractStatusChangeNotifier 類,實現了 doNotify 方法,當應用狀態改變的時候會回調 doNotify 方法。c#

實現釘釘通知

DingTalkNotifier.javaapi

public class DingTalkNotifier extends AbstractStatusChangeNotifier {
    private final SpelExpressionParser parser = new SpelExpressionParser();
    private RestTemplate restTemplate = new RestTemplate();
    private String webhookToken;
    private String atMobiles;
    private String msgtype = "markdown";
    private String title = "服務告警";
    private Expression message;

    public DingTalkNotifier() {
        this.message = this.parser.parseExpression("**#{application.name}** (#{application.id}) is **#{to.status}**", ParserContext.TEMPLATE_EXPRESSION);
    }

    @Override
    protected void doNotify(ClientApplicationEvent event) {
        this.restTemplate.postForEntity(this.webhookToken, this.createMessage(event), Void.class);
    }

    private HttpEntity<Map<String, Object>> createMessage(ClientApplicationEvent event) {
        Map<String, Object> messageJson = new HashMap<>();
        HashMap<String, String> params = new HashMap<>();
        params.put("text", this.getMessage(event));
        params.put("title", this.title);
        messageJson.put("dinggroup", this.dingGroup);
        messageJson.put("atMobiles", this.atMobiles);
        messageJson.put("msgtype", this.msgtype);
        messageJson.put(this.msgtype, params);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
        return new HttpEntity<>(messageJson, headers);
    }

    private String getAtMobilesString(String s) {
        StringBuilder atMobiles = new StringBuilder();
        String[] mobiles = s.split(",");
        for (String mobile : mobiles) {
            atMobiles.append("@").append(mobile);
        }
        return atMobiles.toString();
    }

    private String getMessage(ClientApplicationEvent event) {
        return this.atMobiles == null ? this.message.getValue(event, String.class) : this.message.getValue(event, String.class) + "\n >" + this.getAtMobilesString(this.atMobiles);
    }

    public void setRestTemplate(RestTemplate restTemplate) {
        this.restTemplate = restTemplate;
    }

    public String getWebhookToken() {
        return webhookToken;
    }

    public void setWebhookToken(String webhookToken) {
        this.webhookToken = webhookToken;
    }

    public String getAtMobiles() {
        return atMobiles;
    }

    public void setAtMobiles(String atMobiles) {
        this.atMobiles = atMobiles;
    }

    public String getMsgtype() {
        return msgtype;
    }

    public void setMsgtype(String msgtype) {
        this.msgtype = msgtype;
    }

    public Expression getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = this.parser.parseExpression(message, ParserContext.TEMPLATE_EXPRESSION);
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }
}

代碼邏輯也比較簡單就不一一解釋了。markdown

增長釘釘通知自動配置

DingTalkNotifierConfiguration.javaapp

@Configuration
@ConditionalOnProperty(
        prefix = "spring.boot.admin.notify.dingtalk",
        name = {"webhook-token"}
)
@AutoConfigureBefore({NotifierConfiguration.NotifierListenerConfiguration.class, NotifierConfiguration.CompositeNotifierConfiguration.class})
public class DingTalkNotifierConfiguration {
    public DingTalkNotifierConfiguration() {
    }

    @Bean
    @ConditionalOnMissingBean
    @ConfigurationProperties(prefix = "spring.boot.admin.notify.dingtalk")
    public DingTalkNotifier dingTalkNotifier() {
        return new DingTalkNotifier();
    }

}

大概解釋下此配置類的主要做用:ide

  1. 當配置了 spring.boot.admin.notify.dingtalk.webhook-token 的時候此配置類生效。
  2. spring.boot.admin.notify.dingtalk 下的配置注入到 DingTalkNotifier 生成的 Bean 中。
  3. 指定了此配置配生效的時間以及 Bean 生效的條件。

關鍵在於類和 Bean 上的幾個註解,但這不是本文重點不展開說了。

增長相關配置

spring:
  boot:
    admin:
      notify:
        dingtalk:
          enabled: true
          webhook-token: https://oapi.dingtalk.com/robot/send?access_token=xxxxxxxxxx

而後當項目狀態改變的時候就能夠在釘釘收到消息了。

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