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Error Tracking allows developers to easily discover and view the errors that their application may be generating. By surfacing error information where the code is being developed, efficiency and awareness can be increased.
[Sentry](https://sentry.io/) is an open source error tracking system. GitLab allows administrators to connect Sentry to GitLab, to allow users to view a list of Sentry errors in GitLab.
You can sign up to the cloud hosted [Sentry](https://sentry.io), deploy your own [on-premise instance](https://github.com/getsentry/onpremise/), or use GitLab to [install Sentry to a Kubernetes cluster](../user/clusters/applications.md#install-sentry-using-gitlab-cicd).
1. Sign up to Sentry.io or [deploy your own](#deploying-sentry) Sentry instance.
1. [Create](https://docs.sentry.io/product/sentry-basics/guides/integrate-frontend/create-new-project/) a new Sentry project. For each GitLab project that you want to integrate, we recommend that you create a new Sentry project.
1. On the top bar, select **Menu > Projects** and find your project.
1. On the left sidebar, select **Monitor > Error Tracking**.
1. Select **Enable error tracking**.
1. In GitLab, ensure error tracking is active.
1. On the left sidebar, select **Settings > Monitor**.
1. Expand **Error Tracking**.
1. Ensure the **Active** checkbox is selected.
1. In the **Sentry API URL** box, enter your Sentry hostname. For example, enter `https://sentry.example.com`. For the SaaS version of Sentry, the hostname is `https://sentry.io`.
1. In the **Auth Token** box, enter the token you previously generated.
1. To test the connection to Sentry and populate the **Project** dropdown, select **Connect**.
1. From the **Project** list, choose a Sentry project to link to your GitLab project.
1. Select **Save changes**.
You can now visit **Monitor > Error Tracking** in your project's sidebar to [view a list](#error-tracking-list) of Sentry errors.
You may also want to enable Sentry's GitLab integration by following the steps in the [Sentry documentation](https://docs.sentry.io/product/integrations/gitlab/)
Here, you can filter errors by title or by status (one of Ignored , Resolved, or Unresolved) and sort in descending order by Frequency, First Seen, or Last Seen. By default, the error list is ordered by Last Seen and filtered to Unresolved errors.
From error list, users can navigate to the error details page by clicking the title of any error.
This page has:
- A link to the Sentry issue.
- A link to the GitLab commit if the Sentry [release ID/version](https://docs.sentry.io/product/releases/?platform=javascript#configure-sdk) on the Sentry Issue's first release matches a commit SHA in your GitLab hosted project.
- Other details about the issue, including a full stack trace.
- In [GitLab 12.7 and newer](https://gitlab.com/gitlab-org/gitlab/-/issues/36246), language and urgency are displayed.
By default, a **Create issue** button is displayed:
![Error Details without Issue Link](img/error_details_v12_7.png)
Ignoring an error prevents it from appearing in the [Error Tracking List](#error-tracking-list), and silences notifications that were set up within Sentry.
> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/329596) in GitLab 14.4.
> - [Disabled](https://gitlab.com/gitlab-org/gitlab/-/issues/353639) in GitLab 14.9 [with a flag](../administration/feature_flags.md) named `integrated_error_tracking`. Disabled by default.
FLAG:
By default this feature is not available. To make it available on self-managed GitLab, ask an
administrator to [enable the feature flag](../administration/feature_flags.md)
named `integrated_error_tracking`. The feature is not ready for production use.
On GitLab.com, this feature is not available.
WARNING:
Turning on integrated error tracking may impact performance, depending on your error rates.