# Prometheus Alertmanager data ingestion

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Prometheus knows when a rule fired; Coralogix knows what the rest of the system was doing at the time. Forwarding Alertmanager notifications puts the two together, so alerting activity can be triaged and analyzed alongside your telemetry.

The Contextual Data integration generates the webhook URL; Alertmanager posts to it.

## What you need [​](#what-you-need- "Direct link to what-you-need-")

* Prometheus configured with Alertmanager, and alerting rules already defined.
* A Coralogix API key. You can create one during setup.
* An [application and subsystem name](https://coralogix.com/docs/user-guides/account-management/account-settings/application-and-subsystem-names.md) to file the alerts under.

## Generate the URL in Coralogix [​](#generate-the-url-in-coralogix- "Direct link to generate-the-url-in-coralogix-")

1

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.

Open the Prometheus integration

Select **Data Flow**, then **Contextual Data**, then **Prometheus**, then **Add**, then **Add new**.

2

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.

Enter the integration details

Enter a **Name**. Supply **Your API Key** or select **Create new key**. Enter an **App Name** and **Subsystem Name**.

3

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.

Generate the URL

Select **Generate URL** and copy the result.

[![Coralogix Prometheus integration details form with name, API key, app name, and subsystem name fields](/docs/assets/images/Contextual-Data-Prometheus-Integration-Details-1024x587-45f1aaf8d046c5f67c986400a6795810.webp)](https://coralogix.com/docs/assets/images/Contextual-Data-Prometheus-Integration-Details-1024x587-45f1aaf8d046c5f67c986400a6795810.webp)

Shows the form that produces the webhook URL Alertmanager posts to.

## Configure Alertmanager [​](#configure-alertmanager- "Direct link to configure-alertmanager-")

4

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.

Check your rules

Confirm the rules in your alert file are valid before wiring anything up:

```
promtool check rules /path/to/rules.yml
```

5

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.

Add the Coralogix receiver

Open `alertmanager.yml` (usually at `/etc/alertmanager/alertmanager.yml`, though the path depends on your installation) and add the receiver, replacing `Coralogix-url` with the URL you generated:

```
route:

  receiver: Coralogix



receivers:

  - name: Coralogix

    webhook_configs:

      - url: Coralogix-url

        send_resolved: true
```

`send_resolved: true` forwards the resolution as well as the firing, so a Coralogix Case closes when the alert clears.

6

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.

Validate the configuration

Alertmanager refuses to start on an invalid configuration, so check it first:

```
amtool check-config alertmanager.yml
```

A success message lists what the file configures.

## Example log[​](#example-log "Direct link to Example log")

Each notification arrives with its status, labels, annotations, and the window it covers:

```
{

  "source_system": "prometheus",

  "prometheus": {

    "status": "resolved",

    "labels": {

      "alertname": "InstanceDown",

      "instance": "10.0.0.88:9100",

      "job": "node_exporter",

      "severity": "warning"

    },

    "annotations": {

      "description": "10.0.0.88:9100 of job node_exporter has been down for more than 5 minutes.",

      "summary": "Instance 10.0.0.88:9100 down"

    },

    "startsAt": "2021-03-19T14:59:56.248898138Z",

    "endsAt": "2021-03-19T16:28:11.248898138Z",

    "generatorURL": "http://CentosMachine:9090/graph?g0.expr=up+%3D%3D+0&g0.tab=1"

  }

}
```

## Related resources[​](#related-resources "Direct link to Related resources")

[Prometheus Alert Manager triage](https://coralogix.com/docs/user-guides/cases/prometheus-alert-manager-triage.md)[Prometheus agent](https://coralogix.com/docs/integrations/prometheus/prometheus-agent.md)[Application and subsystem names](https://coralogix.com/docs/user-guides/account-management/account-settings/application-and-subsystem-names.md)