107 lines
5.4 KiB
Markdown
107 lines
5.4 KiB
Markdown
---
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stage: Enablement
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group: Geo
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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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---
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# Geo sites Admin Area **(PREMIUM SELF)**
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You can configure various settings for GitLab Geo sites. For more information, see
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[Geo documentation](../../administration/geo/index.md).
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On either the primary or secondary site:
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1. On the top bar, select **Menu > Admin**.
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1. On the left sidebar, select **Geo > Nodes**.
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## Common settings
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All Geo sites have the following settings:
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| Setting | Description |
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| --------| ----------- |
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| Primary | This marks a Geo site as **primary** site. There can be only one **primary** site. |
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| Name | The unique identifier for the Geo site. It's highly recommended to use a physical location as a name. Good examples are "London Office" or "us-east-1". Avoid words like "primary", "secondary", "Geo", or "DR". This makes the failover process easier because the physical location does not change, but the Geo site role can. All nodes in a single Geo site use the same site name. Nodes use the `gitlab_rails['geo_node_name']` setting in `/etc/gitlab/gitlab.rb` to lookup their Geo site record in the PostgreSQL database. If `gitlab_rails['geo_node_name']` is not set, the node's `external_url` with trailing slash is used as fallback. The value of `Name` is case-sensitive, and most characters are allowed. |
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| URL | The instance's user-facing URL. |
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The site you're currently browsing is indicated with a blue `Current` label, and
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the **primary** node is listed first as `Primary site`.
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## Secondary site settings
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**Secondary** sites have a number of additional settings available:
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| Setting | Description |
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|---------------------------|-------------|
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| Selective synchronization | Enable Geo [selective sync](../../administration/geo/replication/configuration.md#selective-synchronization) for this **secondary** site. |
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| Repository sync capacity | Number of concurrent requests this **secondary** site makes to the **primary** site when backfilling repositories. |
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| File sync capacity | Number of concurrent requests this **secondary** site makes to the **primary** site when backfilling files. |
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## Geo backfill
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**Secondary** sites are notified of changes to repositories and files by the **primary** site,
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and always attempt to synchronize those changes as quickly as possible.
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Backfill is the act of populating the **secondary** site with repositories and files that
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existed *before* the **secondary** site was added to the database. Because there may be
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extremely large numbers of repositories and files, it's not feasible to attempt to
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download them all at once; so, GitLab places an upper limit on the concurrency of
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these operations.
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How long the backfill takes is dependent on the maximum concurrency, but higher
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values place more strain on the **primary** site. The limits are configurable.
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If your **primary** site has lots of surplus capacity,
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you can increase the values to complete backfill in a shorter time. If it's
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under heavy load and backfill reduces its availability for normal requests,
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you can decrease them.
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## Using a different URL for synchronization
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The **primary** site's Internal URL is used by **secondary** sites to contact it
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(to sync repositories, for example). The name Internal URL distinguishes it from
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[External URL](https://docs.gitlab.com/omnibus/settings/configuration.html#configuring-the-external-url-for-gitlab),
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which is used by users. Internal URL does not need to be a private address.
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Internal URL defaults to external URL, but you can also customize it:
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1. On the top bar, select **Menu > Admin**.
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1. On the left sidebar, select **Geo > Nodes**.
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1. Select **Edit** on the site you want to customize.
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1. Edit the internal URL.
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1. Select **Save changes**.
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WARNING:
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We recommend using an HTTPS connection while configuring the Geo sites. To avoid
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breaking communication between **primary** and **secondary** sites when using
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HTTPS, customize your Internal URL to point to a load balancer with TLS
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terminated at the load balancer.
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WARNING:
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Starting with GitLab 13.3 and [until 13.11](https://gitlab.com/gitlab-org/gitlab/-/issues/325522),
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if you use an internal URL that is not accessible to the users, the
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OAuth authorization flow does not work properly, because users are redirected
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to the internal URL instead of the external one.
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## Multiple secondary sites behind a load balancer
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**Secondary** sites can use identical external URLs if
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a unique `name` is set for each Geo site. The `gitlab.rb` setting
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`gitlab_rails['geo_node_name']` must:
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- Be set for each GitLab instance that runs `puma`, `sidekiq`, or `geo_logcursor`.
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- Match a Geo site name.
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The load balancer must use sticky sessions to avoid authentication
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failures and cross-site request errors.
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