go开发alertmanger实现钉钉报警

通过自己的url实现alertmanager的钉钉报警

webhook在alertmanger的配置

- name: 'dingding'
      webhook_configs:
      - send_resolved: true
        url: 'http://xxxx:8080/Alert'

go实现钉钉报警的程序

package main

import (
 "bytes"
 "encoding/json"
 "fmt"
 "net/http"
 "strings"
 "time"
 "log"
 "github.com/gin-gonic/gin"
)

const (
 webHook_Alert = "https://oapi.dingtalk.com/robot/send?access_token=xxxx"
)
type Message struct {
 MsgType string `json:"msgtype"`
 Text struct {
  Content string `json:"content"`
  Mentioned_list string `json:"mentioned_list"`
  Mentioned_mobile_list string `json:"mentioned_mobile_list"`
 } `json:"text"`

}
type Alert struct {
 Labels      map[string]string `json:"labels"`
 Annotations map[string]string `json:annotations`
 StartsAt    time.Time         `json:"startsAt"`
 EndsAt      time.Time         `json:"endsAt"`
}
//通知消息结构体
type Notification struct {
 Version           string            `json:"version"`
 GroupKey          string            `json:"groupKey"`
 Status            string            `json:"status"`
 Receiver          string            `json:receiver`
 GroupLabels       map[string]string `json:groupLabels`
 CommonLabels      map[string]string `json:commonLabels`
 CommonAnnotations map[string]string `json:commonAnnotations`
 ExternalURL       string            `json:externalURL`
 Alerts            []Alert           `json:alerts`
}
//获取报警信息
func getAlertInfo(notification Notification) string {
 var m Message
 m.MsgType = "text"
 msg,err := json.Marshal(notification.GroupLabels)
 if err != nil {
  log.Println("notification.GroupLabels Marshal failed",err)
 }
 msg1,err := json.Marshal(notification.CommonAnnotations["summary"])
 if err != nil {
  log.Println("notification.CommonAnnotations Marshal failed",err)
 }
 //告警消息
 var buffer bytes.Buffer
 buffer.WriteString(fmt.Sprintf("告警: %v\n",string(msg)))
 buffer.WriteString(fmt.Sprintf("Endpoint: %v\n",string(msg1)))
 buffer.WriteString(fmt.Sprintf("告警描述: \"我挂了，快来救我^OO^\"\n"))
 buffer.WriteString(fmt.Sprintf("Status:%v\n",notification.Status))
 //恢复消息
 var buffer2 bytes.Buffer
 buffer2.WriteString(fmt.Sprintf("告警: %v\n",string(msg)))
 buffer2.WriteString(fmt.Sprintf("Endpoint: %v\n",string(msg1)))
 buffer2.WriteString(fmt.Sprintf("告警描述: \"哈哈哈，我又回来了！！！\"\n"))
 //buffer2.WriteString(fmt.Sprintf("mentioned_mobile_list: %v\n",msgres["mentioned_mobile_list"]))
 buffer2.WriteString(fmt.Sprintf("Status:%v\n",notification.Status))
 if notification.Status == "resolved"{
  m.Text.Content = buffer2.String()
 }else {
  m.Text.Content = buffer.String()
 }
 jsons, err := json.Marshal(m)
 resp := string(jsons)
 return resp
}
//钉钉报警
func SendAlertDingMsg(msg string) {
 defer func() {
  if err := recover(); err != nil {
   fmt.Println("err")
  }
 }()
 content := `{"msgtype": "text",
  "text": {"content": "` + msg + `"}
 }`
 //创建一个请求
 req, err := http.NewRequest("POST", webHook_Alert, strings.NewReader(content))
 if err != nil {
  fmt.Println(err)
  fmt.Println("钉钉报警请求异常")
 }
 client := &http.Client{}
 //设置请求头
 req.Header.Set("Content-Type", "application/json; charset=utf-8")
 //发送请求
 resp, err := client.Do(req)
 if err != nil {
  // handle error
  fmt.Println(err)
  fmt.Println("顶顶报发送异常!!!")
 }
 defer resp.Body.Close()
}
func alert( c *gin.Context)  {
 var notification Notification
 err := c.BindJSON(&notification)
 if err != nil {
  c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
  return
 }
 msg := getAlertInfo(notification)
 SendAlertDingMsg(msg)

}
func main()  {
 t := gin.Default()
        t.GET("/",func(c *gin.Context){
            c.String(http.StatusOK,"关于alertmanager实现钉钉报警的方法!!!!")
        })
 t.POST("/Alert",alert)
 t.Run(":8080")
}

可以通过编译二进制打包部署在k8s环境（可以参考下篇文章，如果在k8s环境中部署gin程序）

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