Configure the MQTT notifier for Alerting

Use the Grafana Alerting - MQTT integration to send notifications to an MQTT broker when your alerts are firing.

Procedure

To configure the MQTT integration for Alerting, complete the following steps.

In the left-side menu, click Alerts & IRM and then Alerting.
On the Contact Points tab, click + Add contact point.
Enter a descriptive name for the contact point.
From the Integration list, select MQTT.
Enter your broker URL in the Broker URL field. Supports tcp, ssl, mqtt, mqtts, ws, wss schemes. For example: tcp://127.0.0.1:1883.
Enter the MQTT topic name in the Topic field.
In Optional MQTT settings, specify additional settings for the MQTT integration if needed.
Click Test to check that your integration works.
** For Grafana Alertmanager only.**
A test alert notification should be sent to the MQTT broker.
Click Save contact point.

The integration sends data in JSON format by default. You can change that using Message format field in the Optional MQTT settings section. There are two supported formats:

JSON: Sends the alert notification in JSON format.
Text: Sends the rendered alert notification message in plain text format.

MQTT JSON payload

If the JSON message format is selected in Optional MQTT settings, the payload is sent in the following structure.

{
  "receiver": "My MQTT integration",
  "status": "firing",
  "orgId": 1,
  "alerts": [
    {
      "status": "firing",
      "labels": {
        "alertname": "High memory usage",
        "team": "blue",
        "zone": "us-1"
      },
      "annotations": {
        "description": "The system has high memory usage",
        "runbook_url": "https://myrunbook.com/runbook/1234",
        "summary": "This alert was triggered for zone us-1"
      },
      "startsAt": "2021-10-12T09:51:03.157076+02:00",
      "endsAt": "0001-01-01T00:00:00Z",
      "generatorURL": "https://play.grafana.org/alerting/1afz29v7z/edit",
      "fingerprint": "c6eadffa33fcdf37",
      "silenceURL": "https://play.grafana.org/alerting/silence/new?alertmanager=grafana&matchers=alertname%3DT2%2Cteam%3Dblue%2Czone%3Dus-1",
      "dashboardURL": "",
      "panelURL": "",
      "values": {
        "B": 44.23943737541908,
        "C": 1
      }
    },
    {
      "status": "firing",
      "labels": {
        "alertname": "High CPU usage",
        "team": "blue",
        "zone": "eu-1"
      },
      "annotations": {
        "description": "The system has high CPU usage",
        "runbook_url": "https://myrunbook.com/runbook/1234",
        "summary": "This alert was triggered for zone eu-1"
      },
      "startsAt": "2021-10-12T09:56:03.157076+02:00",
      "endsAt": "0001-01-01T00:00:00Z",
      "generatorURL": "https://play.grafana.org/alerting/d1rdpdv7k/edit",
      "fingerprint": "bc97ff14869b13e3",
      "silenceURL": "https://play.grafana.org/alerting/silence/new?alertmanager=grafana&matchers=alertname%3DT1%2Cteam%3Dblue%2Czone%3Deu-1",
      "dashboardURL": "",
      "panelURL": "",
      "values": {
        "B": 44.23943737541908,
        "C": 1
      }
    }
  ],
  "groupLabels": {},
  "commonLabels": {
    "team": "blue"
  },
  "commonAnnotations": {},
  "externalURL": "https://play.grafana.org/",
  "version": "1",
  "groupKey": "{}:{}",
  "message": "**Firing**\n\nLabels:\n - alertname = T2\n - team = blue\n - zone = us-1\nAnnotations:\n - description = This is the alert rule checking the second system\n - runbook_url = https://myrunbook.com\n - summary = This is my summary\nSource: https://play.grafana.org/alerting/1afz29v7z/edit\nSilence: https://play.grafana.org/alerting/silence/new?alertmanager=grafana&matchers=alertname%3DT2%2Cteam%3Dblue%2Czone%3Dus-1\n\nLabels:\n - alertname = T1\n - team = blue\n - zone = eu-1\nAnnotations:\nSource: https://play.grafana.org/alerting/d1rdpdv7k/edit\nSilence: https://play.grafana.org/alerting/silence/new?alertmanager=grafana&matchers=alertname%3DT1%2Cteam%3Dblue%2Czone%3Deu-1\n"
}

Payload fields

Each notification payload contains the following fields.

Key	Type	Description
receiver	string	Name of the contact point
status	string	Current status of the alert, `firing` or `resolved`
orgId	number	ID of the organization related to the payload
alerts	array of alert instances	Alerts that are triggering
groupLabels	object	Labels that are used for grouping, map of string keys to string values
commonLabels	object	Labels that all alarms have in common, map of string keys to string values
commonAnnotations	object	Annotations that all alarms have in common, map of string keys to string values
externalURL	string	External URL to the Grafana instance sending this webhook
version	string	Version of the payload
groupKey	string	Key that is used for grouping
message	string	Rendered message of the alerts

Alert instance

Each alert instance in the alerts array has the following fields.

Key	Type	Description
status	string	Current status of the alert, `firing` or `resolved`
labels	object	Labels that are part of this alert, map of string keys to string values
annotations	object	Annotations that are part of this alert, map of string keys to string values
startsAt	string	Start time of the alert
endsAt	string	End time of the alert, default value when not resolved is `0001-01-01T00:00:00Z`
values	object	Values that triggered the current status
generatorURL	string	URL of the alert rule in the Grafana UI
fingerprint	string	The labels fingerprint, alarms with the same labels will have the same fingerprint
silenceURL	string	URL to silence the alert rule in the Grafana UI
dashboardURL	string	Deprecated. It will be removed in a future release.
panelURL	string	Deprecated. It will be removed in a future release.
imageURL	string	URL of a screenshot of a panel assigned to the rule that created this notification