Added source upgrade guides for 12.0.0

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Yorick Peterse 2019-06-18 13:57:10 +02:00
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# Upgrading Community Edition and Enterprise Edition from source
NOTE: **Note:**
Users wishing to upgrade to 12.0.0 will have to take some extra steps. See the
version specific upgrade instructions for 12.0.0 for more details.
Make sure you view this update guide from the branch (version) of GitLab you
would like to install (e.g., `11.8`. You can select the version in the version
dropdown at the top left corner of GitLab (below the menu bar).
@ -404,6 +408,23 @@ Example:
Additional instructions here.
-->
### 12.0.0
In 12.0.0 we made various database related changes. These changes require that
users first upgrade to the latest 11.11 patch release. Once upgraded to 11.11.x,
users can upgrade to 12.0.x. You **can not** upgrade from 11.11.x to 12.1.0 or a
newer version, instead you **must** first upgrade to 12.0.0. Failure to do so
may result in database migrations not being applied, which could lead to
application errors.
Example 1: you are currently using GitLab 11.11.3, which is the latest patch
release for 11.11.x. To upgrade, first upgrade to 12.0.0, then upgrade to any
future versions.
Example 2: you are currently using a version of GitLab 10.x. To upgrade, first
upgrade to 11.11.3. Once upgraded to 11.11.3 you can safely upgrade to 12.0.0,
then upgrade to any future versions.
## Things went south? Revert to previous version
### 1. Revert the code to the previous version