OpenWetWare:Administration/Installation

Ilya 18:08, 1 May 2006 (EDT): I've started this page to follow up on the discussion at today's Steering Committee Meeting. Below are some of my notes I have collected while installing/upgrading/moving OpenWetWare.

Ilya 18:02, 25 September 2006 (EDT): These instructions are for installing the latest MediaWiki version (1.7.1 as of today) with Apache on RedHat Enterprise Linux 4 and are specific to OpenWetWare.

Adapted from Sysadmin hub @ mediawiki.org

Prerequisites

 * Install PHP5
 * Need to compile PHP with the following options at minimum:
 * --with-curl
 * Installer from tar file will add LoadModule php5_module modules/libphp5.so into /etc/httpd/conf.httpd.conf. Move this line to /etc/httpd/conf.d/php.conf and comment out the corresponding PHP4 line.

Installation
The idea is to have the OpenWetWare customizations separate from the MediaWiki software installation by placing them in two different directories (/data/web/openwetware and /data/web/mediawiki respectively) with appropriate symlinks setup between them. $ sudo mkdir /data/web/mediawiki $ sudo /usr/sbin/groupadd www $ sudo chown -R root:www /data/www/html/openwetware $ sudo chmod -R g+ws /var/www/html/openwetware sudo chown apache ./config sudo mv ./config/LocalSettings.php ./
 * Download the latest version of MediaWiki (downloading via SVN may be easier that using the tar file)
 * Change DocumentRoot in /etc/httpd/conf/httpd.conf to /data/web/mediawiki
 * Create wiki folder in DocumentRoot:
 * Create a group that would have write access to the wiki folder:
 * Change ownership of the folder:
 * Extract mediawiki code into wikifolder or follow SVN instructions
 * Make config folder writeable by the webserver for setup:
 * Create a VirtualHost entry in Apache configuration file (/etc/httpd/conf/httpd.conf)
 * Visit your wiki site/config and answer configuration questions
 * Wiki name
 * License
 * DB user
 * Sysop account name (e.g., Administrator)
 * move LocalSettings.php from config folder to main wiki folder

LocalSettings.php
ini_set( 'memory_limit', '64M' ); $wgFileExtensions = array('png','gif','jpg','jpeg','ogg','doc','xls','ppt','sxc','pdf'); $wgStrictFileExtensions = false; $wgUploadSizeWarning = 10485760; #10M $wgDisableUploads = false; $wgUseImageResize = true; $wgUseImageMagick = true; $wgImageMagickConvertCommand = "/usr/bin/convert";  # may need changing: /usr/X11R6/bin/convert $wgUseTeX          = true; $wgMathPath        = "{$wgUploadPath}/math"; $wgMathDirectory   = "{$wgUploadDirectory}/math"; $wgTmpDirectory    = "{$wgUploadDirectory}/tmp"; cd ./math make
 * Add extensions after require_once( "includes/DefaultSettings.php" );
 * Specify access rights (to be added)
 * Set PHP memory limit to 64MB (increase needed to allow import of multiple wiki pages):
 * To allow easier file uploads
 * Warn if uploaded files are larger than this (use this to prevent default warning about uploads larger than 100k)
 * To enable image uploads, make sure the 'images' directory is writable, then uncomment this:
 * Top enable image manipulation:
 * If you have the appropriate support software installed you can enable inline LaTeX equations:
 * To install LaTeX support (OCaml software package required):

Optional
$wgLocalTZoffset = date("Z") / 3600; $wgLogo = "$wgStylePath/common/images/newlogoname.jpg";
 * time zone fix to use local time (if hwtime is set to UTC)
 * custom wiki logo (upload the logo image and provide a path to it here)
 * Copyright info
 * Google search
 * Wikitex

End
php_value engine off AddType text/plain .html .htm .shtml sudo chown -R root:wiki wikifolder sudo chmod -R g+w wikifolder find ./ -type d -exec chmod g+s '{}' \; sudo chown apache:wiki ./LocalSettings.php sudo chmod 460 ./LocalSettings.php sudo chown apache:wiki ./images sudo chmod -R g+w ./images sudo chown root:wiki ./images/.htaccess
 * Disable interpretation of PHP in the upload directory (./images):
 * create .htaccess file and with the following two lines:
 * Set permissions
 * make config file read-only by the webserver, readable and writeable by wiki group and not accessible by anyone else (contains mysql user password)
 * make upload directory writeable by the webserver
 * create/move favicon.ico file in/to the wikifolder
 * add commands to daily backup script to dump the wiki database - IMPORTANT

Server-wide config
(to be done once per site)
 * You may wish to turn register_globals off, because some programs may be insecure using that mode. See http://php.net/register_globals for how to disable it.

File uploading
(maximum file size)

php.ini
(changing this file requires Apache restart) upload_max_filesize = <Number>M where <Number> is the limit in MBytes. post_max_size =<Number>M

httpd.conf
(/etc/httpd/conf/httpd.conf for Apache2 on Linux) LimitRequestBody 524288 PHPIniDir /usr/local/pkg/php-5.1.2/etc
 * Some versions of Apache2 have an additional limit which is enforced by default for PHP scripts (Content-length limit in Apache2).
 * Sometimes php.ini file is ignored by Apache; workaround in httpd.conf or /etc/httpd/conf.d/php.conf

SpecialImport.php
This MediaWiki file has a hardcoded MAX_FILE_SIZE on the form that you may need to increase manually.

MySQL user priviliges

 * SHOW DATABASES, CREATE TEMPORARY TABLES, LOCK TABLES ON *.*
 * SELECT, INSERT, UPDATE, DELETE, DROP, CREATE, ALTER ON 'wikidbname'.*

Locking database: read-only mode

 * From Lock the database: since mediawiki 1.5 you can set $wgReadOnly to a string describing the reason for read-only mode, instead of creating a file. (Usual wiki markup is allowed in this string).
 * Read-only lock file: create a file in an upload directory (must be writeable by the web server user), error message with the contents of the file will show up (e.g., "/var/www/html/openwetware/images/lock_yBgMBwiR").
 * From Help on special pages:
 * Lockdb: Developer only. Puts the wiki in read only mode.
 * Unlockdb: Developer only. Puts the wiki in read/write mode.

Resources

 * Installation Help
 * Upgrading MediaWiki
 * Running MediaWiki on Linux
 * Running MediaWiki on Mac OS X
 * Uploading files