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Set up Astro alerts

Astro alerts provide an additional level of observability to Airflow's notification systems. You can configure an alert to notify you in Slack, PagerDuty, or through email when a DAG completes, if you have a DAG run failure, or if a task duration exceeds a specified time.

Unlike Airflow callbacks and SLAs, Astro alerts require no changes to DAG code. Follow this guide to set up your Slack, PagerDuty, or email to receive alerts from Astro and then configure your Deployment to send alerts.


Astro alerts requires OpenLineage. By default, every Astro Deployment has OpenLineage enabled. If you disabled OpenLineage in your Deployment, you need to enable it to use Astro alerts. See Enable/Disable OpenLineage.

To configure Airflow notifications, see Airflow email notifications and Manage Airflow DAG notifications.


Step 1: Configure your communication channel

To set up alerts in Slack, you need to create a Slack app in your Slack workspace. After you've created your app, you can generate a webhook URL in Slack where Astro will send Astro alerts.

  1. Go to Slack API: Applications to create a new app in your organization's Slack workspace.

  2. Click From scratch when prompted to choose how you want to create your app.

  3. Enter a name for your app, like astro-alerts, choose the Slack workspace where you want Astro to send your alerts, and then click Create App.


    If you do not have permission to install apps into your Slack workspace, you can still create the app, but you will need to request that an administrator from your team completes the installation.

  4. Select Incoming webhooks.

  5. On the Incoming webhooks page, click the toggle to turn on Activate Incoming Webhooks. See Sending messages using Incoming Webhooks.

  6. In the Webhook URLs for your Workspace section, click Add new Webhook to Workspace.


    If you do not have permission to install apps in your Slack workspace, click Request to Add New Webhook to send a request to your organization administrator.

  7. Choose the channel where you want to send your Astro alerts and click Allow.

  8. After your webhook is created, copy the webhook URL from the new entry in the Webhook URLs for your Workspace table.

Step 2: Create your Workspace alert in the Cloud UI

In the Cloud UI, you can enable alerts from the Workspace Settings page.

  1. In the Cloud UI, click Alerts.

  2. Click Add Alert.

  3. Enter your Alert Name and choose the alert type, DAG Success, DAG Failure, or Task Duration.


    You can only use Task Duration alerts with individual tasks. Alerting on task group duration is not supported.

  4. Choose the Communication Channels where you want to send your alert.

  5. Add your communication channel information.

    Paste the Webhook URL from your Slack workspace app. If you need to find a URL for an app you've already created, go to your Slack Apps page, select your app, and then choose the Incoming Webhooks page.

    Add your Slack Webhook URL

  6. Add DAGs or tasks that your alert applies to.

    • DAG failure: Click DAG to choose the Deployment and the DAG that you want to send an alert about if it fails.

    • DAG success: Click DAG and choose the Deployment and the DAG that you want to send an alert about when it completes.

    • Task duration: Click Task and choose the Deployment, DAG, and task name. Enter the Duration for how long a task should take to run before you send an alert to your communication channels.

      You can add more DAGs or tasks after you create your alert.

  7. Click Create alert.

Step 3: (Optional) Test your DAG failure alert

Astro alerts work whether your DAG run is manual or scheduled, so you can test your configured Astro alerts by failing your DAG manually.

  1. In the Cloud UI, click DAGs.

  2. Choose the DAG that has your alert configured.

  3. Trigger a DAG run.

  4. Select Mark as and choose Failed to trigger an alert for a DAG failure.

    Manually marking a successful DAG run as Failed.

  5. Check your Slack, PagerDuty, or Email alerts for your DAG failure alert. The alert includes information about the DAG, Workspace, Deployment, and data lineage associated with the failure as well as direct links to the Cloud UI.

    Example of a Slack test alert.

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