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Upgrade from Debian 8 to 9

This guide describes how to upgrade GLaDOS from Debian 8.x to Debian 9.x with all data mirgated. The old Debian 8 server will be called old8 and the new Debian 9 server will be called new9 throughout the whole guide.

Preliminaries

These step have to be done on old8.

Fist, make a backup of all data on the Debian 8 server.

Stop all running daemons via the webinterface.

Upgrade GLaDOS on your server running Debian 8 to version 1.0.4 (see Softwareupdate on Debian).

Create a dump of the MySQL-database of GLaDOS:

mysqldump -u 'glados_user' -p 'glados_database' > /tmp/glados_db_1.0.4.sql

Notice that, glados_user and glados_database must be adjusted according to your setup. You can find the username and database name in the file /etc/glados/config-db.php. The contents of that file could look for example:

<?php
##
## database access settings in php format
## automatically generated from /etc/dbconfig-common/glados.conf
## by /usr/sbin/dbconfig-generate-include
## Tue, 31 Jul 2018 08:47:43 +0200
##
## by default this file is managed via ucf, so you shouldn't have to
## worry about manual changes being silently discarded.  *however*,
## you'll probably also want to edit the configuration file mentioned
## above too.
##
$dbuser='user';
$dbpass='secret';
$basepath='';
$dbname='glados';
$dbserver='';
$dbport='';
$dbtype='mysql';

In the above case you would have to run the following command:

mysqldump -u 'user' -p 'glados' > /tmp/glados_db_1.0.4.sql

There will be a prompt asking for the password. In this case the requested password is secret (without the single quotes).

Copy the file /tmp/glados_db_1.0.4.sql somewhere you have access to for later.

Setup of the new Debian 9 server

These step have to be done on new9.

On the new Debian 9 server, install a fresh version of GLaDOS 1.0.4 (see GitHub releases) according to the Installation Guide. It is important that you install exactly GLaDOS version 1.0.4 and not another one. Note down the password you have provided during the installation for later use.

Data migration (files)

These step have to be done on new9.

Once it's installed, you can start copying the files from the old server to the new one. Directories you have to copy:

  • /var/lib/glados/uploads
  • /var/lib/glados/backups
  • /var/lib/glados/results
  • /var/lib/glados/.ssh
  • /var/log/glados

If you have changed these directories you have to copy the directories configured in /etc/glados/params.php (see Glados config files for more details), namely:

  • uploadPath
  • backupPath
  • resultPath
  • dotSSH
  • daemonLogFilePath

You can use rsync to transfer the files (the / at the end of the directory name is important!):

rsync -arvpgot -e ssh --delete root@old8:/var/lib/glados/uploads/ /var/lib/glados/uploads
rsync -arvpgot -e ssh --delete root@old8:/var/lib/glados/backups/ /var/lib/glados/backups
rsync -arvpgot -e ssh --delete root@old8:/var/lib/glados/results/ /var/lib/glados/results
rsync -arvpgot -e ssh --delete root@old8:/var/lib/glados/.ssh/ /var/lib/glados/.ssh
rsync -arvpgot -e ssh --delete root@old8:/var/log/glados/ /var/log/glados

You can also copy the data with another method, but make sure that the permission, ownership, group and the modification time of the files are preserved (the above rsync commands do take this into account).

Data migration (database)

These step have to be done on new9.

Copy the database dump file from the old Debian 8 server to the /tmp directory of the new Debian 9 server:

scp -p root@old8:/tmp/glados_db_1.0.4.sql /tmp

Connect to the database server:

mysql -u glados -p

Provide the password you have noted down during the installation here.

In the terminal, you should now see a prompt like

MariaDB [(none)]>

Switch to the glados database by issuing

use glados;

The dumped database from earlier in this guide can now be restored by

source /tmp/glados_db_1.0.4.sql;

Close the console by

quit

Upgrade of the new server

You are now ready to update GLaDOS on the new Debian 9 server to the newest version according to the Guide on Softwareupdate on Debian.