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readme: added mysql migration instruction

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Sameer Naik 2014-09-20 13:01:47 +05:30
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README.md
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@ -203,13 +203,25 @@ GitLab uses a database backend to store its data. You can configure this image t
> **Warning**
>
> The internal mysql server will soon be removed from the image.
> Please use a linked [mysql](#linking-to-mysql-container) or
> [postgresql](#linking-to-postgresql-container) container instead.
> Or else connect with an external [mysql](#external-mysql-server) or
> [postgresql](#external-postgresql-server) server.
> You've been warned.
>
> Please use a [linked mysql](#linking-to-mysql-container) container or specify a connection to a [external mysql](#external-mysql-server) server.
>
> **You've been warned.**
>
> If you are already using the internal mysql server then follow these instructions to migrate to a linked mysql container:
>
> Assuming that your mysql data is available at `/opt/gitlab/mysql`
>
> ```bash
> docker run --name=mysql -d \
> -v /opt/gitlab/mysql:/var/lib/mysql \
> sameersbn/mysql:latest
> ```
> This will start a mysql container with your existing mysql data.
> All you need to do now is link this mysql container to the gitlab container using the `--link mysql:mysql` option.
>
> Refer to [Linking to MySQL Container](#linking-to-mysql-container) for more information.
>
This docker image is configured to use a MySQL database backend. The database connection can be configured using environment variables. If not specified, the image will start a mysql server internally and use it. However in this case, the data stored in the mysql database will be lost if the container is stopped/deleted. To avoid this you should mount a volume at `/var/lib/mysql`.
@ -451,10 +463,9 @@ The internal redis server has been removed from the image. Please use a [linked
>
> The internal mysql server will also be removed in the next release.
>
> If you have been using the internal mysql server, then please switch to a
> [linked mysql](#linking-to-mysql-container) container or
> specify a [external mysql](#external-mysql-server) connection.
> You've been warned.
> If you have been using the internal mysql server, then please migrate to a using a [linked mysql server](#linking-to-mysql-container) using the migration instructions listed [here](#internal-mysql-server).
>
> **You've been warned**
>
### External Redis Server