Document server migration process

docs/admin/index.rst

@@ -15,6 +15,7 @@ Setup Guides
    configuration
    importing-music
    external-storages
+   migration
 
 Administration
 --------------

docs/admin/migration.rst

+Migrating to a New Server
+=========================
+
+Sometimes, it may be necessary or desirable to migrate your
+existing Funkwhale setup to a new server. This can be helpful
+if you need to boost resources or if you wish to use a different
+hosting platform.
+
+Requirements
+------------
+
+To get started with your new setup, you will need to have the
+following:
+
+- `rsync <https://linux.die.net/man/1/rsync>`_ installed on the **destination** server
+- SSH access set up between the two servers
+
+Non-Docker
+----------
+
+- On the target server, run through the :doc:`installation steps<../installation/debian>` but skip the Database setup steps
+- Stop all funkwhale related services on the destination server
+- On the original server, create a database backup
+
+.. code-block:: shell
+
+    sudo -u funkwhale pg_dump -d funkwhale > "db.dump"
+
+- On the destination server, use rsync to copy the contents of `/srv/funwkhale/data/media/music` and `/srv/funkwhale/data/music` from the original server
+
+.. code-block:: shell
+
+    rsync -a <your username>@<original server IP/hostname>:/srv/funkwhale/data/media/ /srv/funkwhale/data/media/
+    rsync -a <your username>@<original server IP/hostname>:/srv/funkwhale/data/music/ /srv/funkwhale/data/music/
+
+- Copy your .env file and database backup from your original server
+
+.. code-block:: shell
+
+    rsync -a <your username>@<original server IP/hostname>:/srv/funkwhale/config/.env /srv/funkwhale/config/
+    rsync -a <your username>@<original server IP/hostname>:/srv/funkwhale/db.dump /srv/funkwhale/
+
+- Restore the database dump
+
+.. code-block:: shell
+
+    sudo -u funkwhale pg_restore -d funkwhale db.dump
+
+- Once the database has been restored, follow the database migration steps from the guide to complete the installation
+- Ensure that all DNS changes have been made and start the services
+
+Docker
+------
+
+- On the target server, run through the :doc:`installation steps<../installation/docker>` but skip the `docker-compose run --rm api python manage.py migrate` step
+- Stop all funkwhale related containers on the destination server
+- On the original server, create a database backup
+
+.. code-block:: shell
+
+    docker exec -t funkwhale_postgres_1 pg_dumpall -c -U postgres > "db.dump"
+
+- On the destination server, use rsync to copy the contents of `/srv/funwkhale/data/media/music` and `/srv/funkwhale/data/music` from the original server
+
+.. code-block:: shell
+
+    rsync -a <your username>@<original server IP/hostname>:/srv/funkwhale/data/media/ /srv/funkwhale/data/media/
+    rsync -a <your username>@<original server IP/hostname>:/srv/funkwhale/data/music/ /srv/funkwhale/data/music/
+
+- Copy your .env file and database backup from your original server
+
+.. code-block:: shell
+
+    rsync -a <your username>@<original server IP/hostname>:/srv/funkwhale/.env /srv/funkwhale/
+    rsync -a <your username>@<original server IP/hostname>:/srv/funkwhale/db.dump /srv/funkwhale/
+
+- Restore the database dump
+
+.. code-block:: shell
+
+    docker exec -i funkwhale_postgres_1 pg_restore -c -U postgres -d postgres < "db.dump"
+
+- Once the database has been restored, run the migrations
+- Ensure that all DNS changes have been made and start the services
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