75 lines
5.4 KiB
Markdown
75 lines
5.4 KiB
Markdown
---
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stage: Enablement
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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/engineering/ux/technical-writing/#assignments
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type: reference
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---
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# Environment variables
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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 | Enables Bootsnap for speeding up initial Rails boot (`1` to enable). |
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| `GITLAB_CDN_HOST` | string | Sets the base URL for a CDN to serve static assets (for example, `//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_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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| `GITLAB_UNICORN_MEMORY_MAX` | integer | The maximum memory threshold (in bytes) for the [unicorn-worker-killer](operations/unicorn.md#unicorn-worker-killer). |
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| `GITLAB_UNICORN_MEMORY_MIN` | integer | The minimum memory threshold (in bytes) for the [unicorn-worker-killer](operations/unicorn.md#unicorn-worker-killer). |
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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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## Complete database variables
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The recommended method for specifying your database connection information is
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to set the `DATABASE_URL` environment variable. This variable contains
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connection information (`adapter`, `database`, `username`, `password`, `host`,
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and `port`), but no behavior information (`encoding` or `pool`). If you don't
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want to use `DATABASE_URL`, or want to set database behavior information,
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either:
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- Copy the template file, `cp config/database.yml.env config/database.yml`.
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- Set a value for some `GITLAB_DATABASE_XXX` variables.
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The list of `GITLAB_DATABASE_XXX` variables that you can set is:
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| Variable | Default value | Overridden by `DATABASE_URL`? |
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|-----------------------------|--------------------------------|-------------------------------|
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| `GITLAB_DATABASE_ADAPTER` | `postgresql` | **{check-circle}** Yes |
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| `GITLAB_DATABASE_DATABASE` | `gitlab_#{ENV['RAILS_ENV']` | **{check-circle}** Yes |
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| `GITLAB_DATABASE_ENCODING` | `unicode` | **{dotted-circle}** No |
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| `GITLAB_DATABASE_HOST` | `localhost` | **{check-circle}** Yes |
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| `GITLAB_DATABASE_PASSWORD` | _none_ | **{check-circle}** Yes |
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| `GITLAB_DATABASE_POOL` | `10` | **{dotted-circle}** No |
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| `GITLAB_DATABASE_PORT` | `5432` | **{check-circle}** Yes |
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| `GITLAB_DATABASE_USERNAME` | `root` | **{check-circle}** Yes |
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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](https://docs.gitlab.com/omnibus/docker/#pre-configure-docker-container)
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section of the Omnibus GitLab documentation.
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