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alerts.go
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alerts.go
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package main
import (
"io/ioutil"
"log"
"net/http"
"os"
"os/exec"
"time"
"github.com/buger/jsonparser"
)
func alertRunner() {
alerts := cfg.Alerts
for _, alert := range alerts {
go alertLookup(alert)
}
}
func alertLookup(a Alert) {
for {
log.Print("Querying Prometheus Alert Manager for active alerts")
resp, err := http.Get(a.AlertHost + "/api/v1/alerts/")
if err != nil {
log.Print(err)
}
body, _ := ioutil.ReadAll(resp.Body)
//loop over json returned from alertmanager API, drill down into data, labels, alertname
jsonparser.ArrayEach(body, func(value []byte, dataType jsonparser.ValueType, offset int, err error) {
active, err := jsonparser.GetString(value, "labels", "alertname")
if err != nil {
log.Print(err)
os.Exit(0)
}
if active == a.Name {
log.Printf("Running action %s", a.Action)
action := a.Action
runAction(action)
time.Sleep(120 * time.Second)
}
}, "data") //top level json that contains the list of alerts
time.Sleep(60 * time.Second)
}
}
func runAction(action string) {
cmd := exec.Command(action)
stdout, err := cmd.Output()
if err != nil {
println(err.Error())
return
}
log.Print(string(stdout))
}