description: Get started with Grafana Alerting by creating your first alert in just a few minutes. Learn how to set up an alert, send alert notifications to a public webhook, and generate sample data to observe your alert in action.
description: Get started with Grafana Alerting by creating your first alert in just a few minutes. Learn how to set up an alert, send alert notifications to a public webhook, and generate sample data to observe your alert in action.
In this guide, we'll walk you through the process of setting up your first alert in just a few minutes. You'll witness your alert in action with real-time data, as well as sending alert notifications.
The first time you run `docker compose up -d`, Docker downloads all the necessary resources for the tutorial. This might take a few minutes, depending on your internet connection.
If you already have Grafana, Loki, or Prometheus running on your system, you might see errors, because the Docker image is trying to use ports that your local installations are already using. If this is the case, stop the services, then run the command again.
If you already have Grafana, Loki, or Prometheus running on your system, you might see errors, because the Docker image is trying to use ports that your local installations are already using. If this is the case, stop the services, then run the command again.
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Alternatively, you can try out this example in our interactive learning environment: [Get started with Grafana Alerting](https://killercoda.com/grafana-labs/course/).
It's a fully configured environment with all the dependencies already installed.
Besides being an open-source observability tool, Grafana has its own built-in alerting service. This means that you can receive notifications whenever there is an event of interest in your data, and even see these events graphed in your visualizations.
In this step, we'll set up a new [contact point](https://grafana.com/docs/grafana/latest/alerting/configure-notifications/manage-contact-points/integrations/webhook-notifier/). This contact point will use the _webhooks_ integration. In order to make this work, we also need an endpoint for our webhook integration to receive the alert. We will use [Webhook.site](https://webhook.site/) to quickly set up that test endpoint. This way we can make sure that our alert is actually sending a notification somewhere.
1. In **URL**, paste the endpoint to your webhook endpoint.
1. Click **Test**, and then click **Send test notification** to send a test alert to your webhook endpoint.
1. Navigate back to [Webhook.site](https://webhook.site/). On the left side, there's now a `POST /` entry. Click it to see what information Grafana sent.
{{<figuresrc="/media/docs/alerting/alerting-webhook-detail.png"max-width="1200px"caption="A POST entry in Webhook.site">}}
We have created a dummy Webhook endpoint and created a new Alerting contact point in Grafana. Now, we can create an alert rule and link it to this new integration.
Next, we'll establish an [alert rule](http://grafana.com/docs/grafana/next/alerting/fundamentals/alert-rule-evaluation/) within Grafana Alerting to notify us whenever alert rules are triggered and resolved.
1. Enter alert rule name for your alert rule. Make it short and descriptive as this will appear in your alert notification. For instance, **database-metrics**
In Prometheus, `vector(1)` is a special type of PromQL query that generates a constant vector. This is useful in testing and query manipulation, where you might need a constant value for calculations or comparisons. This query will allow you to create an alert rule that will be always firing.
1. Remove the ‘B’**Reduce expression** (click the bin icon). The Reduce expression comes by default, and in this case, it is not needed since the queried data is already reduced. Note that the Threshold expression is now your **Alert condition**.
It should return a single sample with the value 1 at the current timestamp. And, since `1` is above `0`, the alert condition has been met, and the alert rule state is `Firing`.
An [evaluation group](https://grafana.com/docs/grafana/latest/alerting/fundamentals/alert-rules/rule-evaluation/) defines when an alert rule fires, and it’s based on two settings:
- **Evaluation group**: how frequently the alert rule is evaluated.
- **Evaluation interval**: how long the condition must be met to start firing. This allows your data time to stabilize before triggering an alert, helping to reduce the frequency of unnecessary notifications.
To set up the evaluation:
1. In **Folder**, click **+ New folder** and enter a name. For example: _metric-alerts_. This folder will contain our alerts.
Now that the alert rule has been configured, you should receive alert [notifications](http://grafana.com/docs/grafana/next/alerting/fundamentals/alert-rule-evaluation/state-and-health/#notifications) in the contact point whenever alerts trigger and get resolved.
Since the alert rule that you have created has been configured to always fire, once the evaluation interval has concluded, you should receive an alert notification in the Webhook endpoint.
The alert notification details show that the alert rule state is Firing , and it includes the value that made the rule trigger by exceeding the threshold of the alert rule condition. The notification also includes links to see the alert rule details, and another link to add a [Silence](http://grafana.com/docs/grafana/next/alerting/configure-notifications/create-silence/) to it.
By incrementing the threshold, the condition is no longer met, and after the evaluation interval has concluded (1 minute approx.), you should receive an alert notification with status **“Resolved”**.
Your learning journey continues in [Part 2](http://grafana.com/tutorials/alerting-get-started-pt2/) where you will learn about alert instances and notification routing.
In this tutorial, you have learned how to set up a contact point, create an alert, and send alert notifications to a public Webhook. By following these steps, you’ve gained a foundational understanding of how to leverage Grafana Alerting capabilities to monitor and respond to events of interest in your data.
Feel free to experiment with different [contact points](https://grafana.com/docs/grafana/latest/alerting/configure-notifications/manage-contact-points/) to customize your alert notifications and discover the configuration that best suits your needs.