f/matrix-alertmanager-receiver
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Properly handle incoming hooks

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This commit is contained in:
Timothée Floure 2020-05-03 08:54:18 +02:00
parent b3074bee04
commit a89b9ff694
2 changed files with 27 additions and 11 deletions
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24
main.go
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@ -6,13 +6,13 @@ import (
"fmt" "fmt"
"log" "log"
"net/http" "net/http"
"io/ioutil"
"encoding/json" "encoding/json"
"github.com/prometheus/alertmanager/template"
"github.com/matrix-org/gomatrix" "github.com/matrix-org/gomatrix"
) )
type Alert struct { func generateMatrixMessageBody(alert template.Alert) string {
return alert.Status + " // " + alert.Annotations["summary"]
} }
func main() { func main() {
@ -77,16 +77,20 @@ You will find more details on: http://git.sr.ht/~fnux/matrix-prometheus-alertman
return return
} }
var alert Alert payload := template.Data{}
reqBody, _ := ioutil.ReadAll(r.Body) if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
json.Unmarshal(reqBody, &alert) w.WriteHeader(http.StatusBadRequest)
}
// Check validity logger.Printf("Received valid hook from %v", r.RemoteAddr)
logger.Printf("Sending message") for _, alert := range payload.Alerts {
_, err := matrixClient.SendText(*target, "spouik spouik spouik") body := generateMatrixMessageBody(alert)
logger.Printf("> %v", body)
_, err := matrixClient.SendText(*target, body)
if err != nil { if err != nil {
logger.Fatalf("Failed to send message: %v", err) logger.Fatalf("Could not forward to Matrix: %v", err)
}
} }
w.WriteHeader(http.StatusOK) w.WriteHeader(http.StatusOK)

12
mock-webhook.sh Executable file
View file

@ -0,0 +1,12 @@
#!/bin/sh
#
# Send a dummy hook to localhost:9088 for testing purposes.
TARGET=http://localhost:9088/alert
PAYLOAD=$(cat << EOF
{"receiver":"matrix","status":"firing","alerts":[{"status":"firing","labels":{"alertname":"instance_down","instance":"example1"},"annotations":{"info":"The instance example1 is down","summary":"instance example1 is down"},"startsAt":"2020-05-03T08:30:06.275828332+02:00","endsAt":"0001-01-01T00:00:00Z","generatorURL":""}],"groupLabels":{"alertname":"instance_down"},"commonLabels":{"alertname":"instance_down","instance":"example1"},"commonAnnotations":{"info":"The instance example1 is down","summary":"instance example1 is down"},"externalURL":"http://control:9093","version":"4","groupKey":"{}:{alertname=\"instance_down\"}"}
EOF
)
curl -X POST -d "$PAYLOAD" "$TARGET"