So I managed to get things up and running. SELinux wasn't the issue. Before I go making assumptions, however I have some additional questions: 1. Does MediaWiki support memcached? - Based on evidence I see on the net, the answer to this question should be "yes indeed!" but, this leads me to another question: 2. Does MediaWiki support connecting/interacting with memcached over unix domain socket? - I cannot seem to find an answer regarding this on the internet, and based on my work around that I implemented, this does not seem to be the case.
The work-around I had to implement to get my installation to work was: 1. Install php-xml 2. Run the MediaWiki installer via the CLI. The session_start errors prevented me loading the interactive installation page, and this in term prevented me from having a LocalSettings.php page present to modify. So I ran the installer via php-cli:
php maintenance/install.php --dbname your dbname --dbserver localhost --dbtype mysql --dbuser yourdbuser --dbpass "yourdbpass" --pass "yourdbpass" wikiname wikiadminusername
After getting a copy of Localsettings.php, I was able to load the landing page, but then attempting to do anything else on the wiki resulted in 500 errors. I tried specifying memcached as my cache/session manager per documentation for MediaWiki
But since my memcachedinstance is configured to use unix sockets, I could not enter the address for MediaWiki to interact with memcached. I ended up having to manually override the session storage and management mechanism in Locallsettings.php by adding these lines to that file:
ini_set('session.save_path', "/tmp/"); ini_set('session.save_handler', 'files');
So, finally, here are my questions: Does MediaWiki support memcached? Does it support connecting to memcached over Unix domain socket? If so, how do I configure MediaWiki to do so?
On Mon, Nov 4, 2013 at 8:54 AM, Chris Steipp csteipp@wikimedia.org wrote:
If you're using centos 6, definitely try *temporarily* disabling selinux make sure your policy isn't preventing access.
On Nov 3, 2013 11:29 AM, "Tony Robinson" deusexmachina667@gmail.com wrote:
Hello,
I'm trying to install MediaWiki on CentOS with php-fpm, memcached, and nginx over SSL. If you've seen the Ars Technica "How to set up a Safe and Secure Web Server" (
http://arstechnica.com/gadgets/2012/11/how-to-set-up-a-safe-and-secure-web-s... )
I'm basically attempting to replicate all the applications they installed on Ubuntu to CentOS.
So long story short, I'm installing Mediawiki as per the instructions
here:
http://arstechnica.com/information-technology/2013/02/web-served-7-wiki-wiki...
Whenever I attempt to browse to the default index page on my wiki to perform the install, I get a blank page. I check my nginx error logs and
I
get this:
2013/11/03 11:27:37 [error] 22415#0: *1 FastCGI sent in stderr: "PHP message: PHP Fatal error: session_start(): Failed to initialize storage module: memcache (path: /var/run/memcached/memcached.sock) in
/var/www/html/BlindSeeker/public_html/wiki/includes/templates/NoLocalSettings.php
on line 50" while reading response header from upstream, client: 192.168.1.2, server: www.blindseeker.localdomain, request: "GET /wiki/ HTTP/1.1", upstream: "fastcgi://unix:/var/run/php-fpm/php-fpm.soc:",
host:
"192.168.1.11"
So, understand my web-foo isn't strong, but from what I can make of this, Mediawiki is refusing to use memcache for session management. php-fpm has been told where the unix socket for memcached is located, and other php applications (vanilla, wordpress) are able to use it effectively.
I can also use nc -U /var/run/memcached/memcached.sock and connect to the socket successfully, so I don't know why MediaWiki is refusing to use it.
So I've tried hitting the #mediawiki IRC channel for some answers, and
the
only suggestion I got back was to see if safe_mode is turned on via php.ini, other suggestions via google state to turn on verbose logging under LocalSettings.php, but the file doesn't exist yet -- I haven't finished the installation phase since the install page won't render.
So, I'm at a loss here. any suggestions?
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