README.md

Google Cloud Monitoring/Alert Notification Webhook to Discord

I was struggling to find the webhook API documentation, if someone know where it is, please share!

I've created a simple google cloud function (index.js) with NodeJS to push the monitoring alert to Discord.

You can also find a webhook body data as an example and a typescript interface.

gcp-monitoring-alerting-webhook-body-data.interface.ts

export interface Body {
    incident: Incident;
    version:  string;
}

export interface Incident {
    observed_value:             string;
    metadata:                   Metadata;
    resource_id:                string;
    scoping_project_id:         string;
    resource:                   Resource;
    started_at:                 number;
    scoping_project_number:     number;
    url:                        string;
    policy_name:                string;
    resource_type_display_name: string;
    ended_at:                   null | string;
    metric:                     Metric;
    incident_id:                string;
    condition:                  Condition;
    condition_name:             string;
    summary:                    string;
    resource_name:              string;
    state:                      string;
    threshold_value:            string;
}

export interface Condition {
    conditionThreshold: ConditionThreshold;
    displayName:        string;
    name:               string;
}

export interface ConditionThreshold {
    aggregations:   Aggregation[];
    trigger:        Trigger;
    duration:       string;
    comparison:     string;
    filter:         string;
    thresholdValue: number;
}

export interface Aggregation {
    groupByFields:      string[];
    alignmentPeriod:    string;
    crossSeriesReducer: string;
    perSeriesAligner:   string;
}

export interface Trigger {
    count: number;
}

export interface Metadata {
    system_labels: SystemLabelsClass;
    user_labels:   SystemLabelsClass;
}

export interface SystemLabelsClass {
}

export interface Metric {
    labels:      SystemLabelsClass;
    displayName: string;
    type:        string;
}

export interface Resource {
    type:   string;
    labels: ResourceLabels;
}

export interface ResourceLabels {
    host:       string;
    project_id: string;
}

index.js

/**
 * Responds to any HTTP request.
 *
 * @param {!express:Request} req HTTP request context.
 * @param {!express:Response} res HTTP response context.
 */
 const axios = require('axios');

 const DISCORD_WEBHOOK='https://discord.com/api/webhooks/921049208423858177/r2EAEDdVIGrrpz4rYmjwX1E8U_Z4kEZQpUe3dKa2mafIOffEtXVdbzm0D-HRkauO8Brh';

 const COLORS = {
     red: 15548997,
     green: 5763719,
     yellow: 16705372,
 }

 exports.run = async (req, res) => {
     const { incident } = req.body;
 
     const { 
         summary,
         condition_name,
         policy_name,
         started_at,
         scoping_project_id,
         resource_type_display_name,
         url,
         ended_at } = incident;

    const color = ended_at ? COLORS.green : COLORS.red;
    const unixTimestamp = ended_at || started_at;
    const timestamp =  new Date(unixTimestamp * 1000).toISOString();

    const discordBody = {
        title: condition_name,
        description: summary,
        url,
        color,
        timestamp,
    };


    try {
        const { data } = await axios.post(DISCORD_WEBHOOK, {
            "content": resource_type_display_name,
            embeds: [discordBody]
        });
        console.log(data);
    } catch (error) {
        console.log(error.response, error.response.data);
    } finally {
        res.status(200).send();
    }
 };

webook-body-data-example.json

{
    "incident": {
      "observed_value": "4.000",
      "metadata": {
        "system_labels": {},
        "user_labels": {}
      },
      "resource_id": "",
      "scoping_project_id": "project-id",
      "resource": {
        "type": "uptime_url",
        "labels": {
          "host": "example.com",
          "project_id": "project-id"
        }
      },
      "started_at": 1640031275,
      "scoping_project_number": 766016839238,
      "url": "https://console.cloud.google.com/monitoring/alerting/incidents/0.mb2gdsa5dkwcn4?project=project-id",
      "policy_name": "stage-api.loyall.com.br uptime failure",
      "resource_type_display_name": "Uptime Check URL",
      "ended_at": null,
      "metric": {
        "labels": {},
        "displayName": "Check passed",
        "type": "monitoring.googleapis.com/uptime_check/check_passed"
      },
      "incident_id": "0.mb2g35dkwcn4",
      "condition": {
        "conditionThreshold": {
          "aggregations": [
            {
              "groupByFields": [
                "resource.label.*"
              ],
              "alignmentPeriod": "1200s",
              "crossSeriesReducer": "REDUCE_COUNT_FALSE",
              "perSeriesAligner": "ALIGN_NEXT_OLDER"
            }
          ],
          "trigger": {
            "count": 1
          },
          "duration": "60s",
          "comparison": "COMPARISON_GT",
          "filter": "metric.type=\"monitoring.googleapis.com/uptime_check/check_passed\" AND metric.label.check_id=\"example.com.br\" AND resource.type=\"uptime_url\"",
          "thresholdValue": 1
        },
        "displayName": "Failure of uptime check_id example.com.br",
        "name": "projects/project-id/alertPolicies/16385515134911267361/conditions/16385515134911269630"
      },
      "condition_name": "Failure of uptime check_id example.com.br",
      "summary": "An uptime check on project-id Uptime Check URL labels {project_id=project-id, host=example.com} is failing.",
      "resource_name": "project-id Uptime Check URL labels {project_id=project-id, host=example.com}",
      "state": "open",
      "threshold_value": "1"
    },
    "version": "1.2"
  }