54 lines
4.8 KiB
Markdown
54 lines
4.8 KiB
Markdown
---
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stage: Systems
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group: Distribution
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info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/product/ux/technical-writing/#assignments
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type: reference
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---
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# Environment variables **(FREE SELF)**
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GitLab exposes certain environment variables which can be used to override
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their defaults values.
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People usually configure GitLab with `/etc/gitlab/gitlab.rb` for Omnibus
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installations, or `gitlab.yml` for installations from source.
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You can use the following environment variables to override certain values:
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## Supported environment variables
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| Variable | Type | Description |
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|--------------------------------------------|---------|---------------------------------------------------------------------------------------------------------|
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| `DATABASE_URL` | string | The database URL; is of the form: `postgresql://localhost/blog_development`. |
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| `ENABLE_BOOTSNAP` | string | Toggles [Bootsnap](https://github.com/Shopify/bootsnap) for speeding up initial Rails boot. Enabled by default for non-production environments. Set to `0` to disable. |
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| `EXTERNAL_URL` | string | Specify the external URL at the [time of installation](https://docs.gitlab.com/omnibus/settings/configuration.html#specifying-the-external-url-at-the-time-of-installation). |
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| `EXTERNAL_VALIDATION_SERVICE_TIMEOUT` | integer | Timeout, in seconds, for an [external CI/CD pipeline validation service](external_pipeline_validation.md). Default is `5`. |
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| `EXTERNAL_VALIDATION_SERVICE_URL` | string | URL to an [external CI/CD pipeline validation service](external_pipeline_validation.md). |
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| `EXTERNAL_VALIDATION_SERVICE_TOKEN` | string | The `X-Gitlab-Token` for authentication with an [external CI/CD pipeline validation service](external_pipeline_validation.md). |
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| `GITLAB_CDN_HOST` | string | Sets the base URL for a CDN to serve static assets (for example, `https://mycdnsubdomain.fictional-cdn.com`). |
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| `GITLAB_EMAIL_DISPLAY_NAME` | string | The name used in the **From** field in emails sent by GitLab. |
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| `GITLAB_EMAIL_FROM` | string | The email address used in the **From** field in emails sent by GitLab. |
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| `GITLAB_EMAIL_REPLY_TO` | string | The email address used in the **Reply-To** field in emails sent by GitLab. |
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| `GITLAB_EMAIL_SUBJECT_SUFFIX` | string | The email subject suffix used in emails sent by GitLab. |
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| `GITLAB_HOST` | string | The full URL of the GitLab server (including `http://` or `https://`). |
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| `GITLAB_MARKUP_TIMEOUT` | string | Timeout, in seconds, for `rest2html` and `pod2html` commands executed by the [`gitlab-markup` gem](https://gitlab.com/gitlab-org/gitlab-markup/). Default is `10`. |
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| `GITLAB_ROOT_PASSWORD` | string | Sets the password for the `root` user on installation. |
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| `GITLAB_SHARED_RUNNERS_REGISTRATION_TOKEN` | string | Sets the initial registration token used for runners. |
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| `RAILS_ENV` | string | The Rails environment; can be one of `production`, `development`, `staging`, or `test`. |
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| `UNSTRUCTURED_RAILS_LOG` | string | Enables the unstructured log in addition to JSON logs (defaults to `true`). |
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| `GITLAB_RAILS_CACHE_DEFAULT_TTL_SECONDS` | integer | The default TTL used for entries stored in the Rails-cache. Default is `28800`. [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/95042) in 15.3. |
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## Adding more variables
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We welcome merge requests to make more settings configurable by using variables.
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Make changes to the `config/initializers/1_settings.rb` file, and use the
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naming scheme `GITLAB_#{name in 1_settings.rb in upper case}`.
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## Omnibus configuration
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To set environment variables, follow [these instructions](https://docs.gitlab.com/omnibus/settings/environment-variables.html).
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It's possible to preconfigure the GitLab Docker image by adding the environment
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variable `GITLAB_OMNIBUS_CONFIG` to the `docker run` command.
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For more information, see the [Pre-configure Docker container](../install/docker.md#pre-configure-docker-container)
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section of the Omnibus GitLab documentation.
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