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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