Sunday, 27 April 2008

Backing and Restoring Mediawiki in Ubuntu

We are going to learn how to back up and restore our Mediawiki installed on a Ubuntu system.

To acomplish that we will execute some wiki maintenance commands.
These maintenance commands will be accesible after configuring AdminSettings.php file.

CONFIGURING AdminSettings.php FILE


AdminSettings.sample from the Mediawiki examples documentation will serve us as a model file to start.

We copy it into mediawiki configuration directory in /etc and assign the correct owner and permissions.
$sudo cp /usr/share/doc/mediawiki1.10/examples/AdminSettings.sample /etc/mediawiki1.10/AdminSettings.php
$sudo chown root:root /etc/mediawiki1.10/AdminSettings.php
$sudo chmod 600 /etc/mediawiki1.10/AdminSettings.php



Now we are going to edit AdminSettings.php file
$gksudo gedit /etc/mediawiki1.10/AdminSettings.php

Change these two variables using the parameters you used when creating the wiki database: e.g: wikiuser and its password.
$wgDBadminuser = 'DB user name'
$wgDBadminpassword = 'DB password'

Now that AdminSettings.php file is properly configured we are gonna back up and restore the wiki.


BACKING UP THE WIKI


dumpBackup.php command will back up our wiki:
$cd /var/lib/mediawiki1.10/maintenance
$sudo php dumpBackup.php --current > ~/foo_backup.xml

NOTE: --full option backups history of pages, not only last version as --current does.


RESTORING THE WIKI


importDump.php is the command we need:
$cd /var/lib/mediawiki1.10/maintenance
$sudo php importDump.php ~/foo_backup.xml


If after importing the xml file we still do not see anything in the wiki, we shall exec:
$sudo php rebuildrecentchanges.php
or
$sudo php update.php



NOTE: Those previous commands only back up and restore the text part of the wiki. They just create an xml with text.

Following commands shows how to backup and restore images in your wiki:

BACKING UP THE IMAGES OF YOUR WIKI


NOTE: As now, the wiki is placed mostly in /var/lib/mediawiki directory, we will assume the wiki is placed there, instead of /var/lib/mediawiki1.10 . This also suites better new wiki versions.

We create the directory where we will store the wiki image files:
$mkdir image_backup_dir && cd image_backup_dir

dumpUploads.php command shows all wiki image file locations.

We use this command output to copy all those files to our storage directory:
$sudo php /var/lib/mediawiki/maintenance/dumpUploads.php --base=$(pwd) | xargs -I foo cp 'foo' . -v

--base option tells dumpUploads.php command that all file places should be related to current directory.

xargs -I foo cp 'foo' . -v reads every file location from standard input and copies it to current directory.

If there has been no error, our current directory is populated now with the wiki image and media files.


RESTORING THE IMAGES OF YOUR WIKI


Once you have created image_backup_dir directory containing all the wiki image files we could restore them.

We execute importImages.php command and pass as argument the path to our image_backup_dir directory where all the images are:
$sudo php /var/www/mediawiki/maintenance/importImages.php image_backup_dir

Your wiki will show now all the images.


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4 comentarios:

fotoflo said...

hi, does this back up images and SQL files? or just the xml?

VicenteHA said...

Hi fotoflo,

sorry for the delay.

dumpBackup.php and importBackup.php commands only back up the wiki text.

Now I have updated the blog entry showing how to also back up and restore images in the wiki.

Thanks,
Vicente.

Re@PeR said...

I think you have a typo using --base, there's an '=' missing.

Here's my exporter script:

cp `php /var/lib/mediawiki/maintenance/dumpUploads.php --base=$(pwd) | xargs` ./

and importer script:

php /var/lib/mediawiki/maintenance/importImages.php ./

Vicente Hernando said...

Hi Re@PeR,

thanks a lot for you comment!

It is corrected now.