98 lines
3.9 KiB
Markdown
98 lines
3.9 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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---
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# Downgrading from EE to CE
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If you ever decide to downgrade your Enterprise Edition back to the
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Community Edition, there are a few steps you need take beforehand. On Omnibus GitLab
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installations, these steps are made before installing the CE package on top of
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the current EE package. On installations from source, they are done before
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you change remotes and fetch the latest CE code.
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## Disable Enterprise-only features
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First thing to do is to disable the following features.
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### Authentication mechanisms
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Kerberos and Atlassian Crowd are only available on the Enterprise Edition. You
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should disable these mechanisms before downgrading. Be sure to provide
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alternative authentication methods to your users.
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### Remove Service Integration entries from the database
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The GitHub integration is only available in the Enterprise Edition codebase,
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so if you downgrade to the Community Edition, the following error displays:
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```plaintext
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Completed 500 Internal Server Error in 497ms (ActiveRecord: 32.2ms)
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ActionView::Template::Error (The single-table inheritance mechanism failed to locate the subclass: 'GithubService'. This
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error is raised because the column 'type' is reserved for storing the class in case of inheritance. Please rename this
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column if you didn't intend it to be used for storing the inheritance class or overwrite Integration.inheritance_column to
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use another column for that information.)
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```
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All integrations are created automatically for every project you have.
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To avoid getting this error, you must remove all records with the type set to
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`GithubService` from your database:
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- **Omnibus Installation**
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```shell
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sudo gitlab-rails runner "Integration.where(type: ['GithubService']).delete_all"
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```
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- **Source Installation**
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```shell
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bundle exec rails runner "Integration.where(type: ['GithubService']).delete_all" production
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```
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NOTE:
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If you are running `GitLab =< v13.0` you must also remove `JenkinsDeprecatedService` records
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and if you are running `GitLab =< v13.6` you must remove `JenkinsService` records.
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### Variables environment scopes
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In GitLab Community Edition, [environment scopes](../user/group/clusters/index.md#environment-scopes)
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are completely ignored, so if you are using this feature there may be some
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necessary adjustments to your configuration. This is especially true if
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configuration variables share the same key, but have different
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scopes in a project. In cases like these you could accidentally get a variable
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which you're not expecting for a particular environment. Make sure that you have
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the right variables in this case.
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Your data is completely preserved in the transition, so you could always upgrade
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back to EE and restore the behavior if you leave it alone.
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## Downgrade to CE
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After performing the above mentioned steps, you are now ready to downgrade your
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GitLab installation to the Community Edition.
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- **Omnibus Installation**
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To downgrade an Omnibus installation, it is sufficient to install the Community
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Edition package on top of the currently installed one. You can do this manually,
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by directly [downloading the package](https://packages.gitlab.com/gitlab/gitlab-ce)
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you need, or by adding our CE package repository and following the
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[CE installation instructions](https://about.gitlab.com/install/?version=ce).
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- **Source Installation**
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To downgrade a source installation, you must replace the current remote of
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your GitLab installation with the Community Edition's remote. After that, you
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can fetch the latest changes, and checkout the latest stable branch:
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```shell
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git remote set-url origin git@gitlab.com:gitlab-org/gitlab-foss.git
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git fetch --all
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git checkout 8-x-stable
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```
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Remember to follow the correct [update guides](../update/index.md) to make
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sure all dependencies are up to date.
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