Mag Gam wrote:
Is it possible to have mediawiki be high available?
I have 2 servers and I would like to have it highly available in case
1 server goes down.
Has anyone done this before?
TIA
As George Herbert explained, you can make it as redundant as you want.
For your setup I'd do the following:
Server 1 (main):
-Web server
-Mediawiki
-Master mysql
-Upload folder (under a different subdomain)
Server 2 (slave):
-Web server
-Mediawiki
-Slave mysql (read-only, replicating from server 1)
-Copy of upload folder. You can rsync daily.
Configure the mediawiki on server 2 to have server 1 as master and
localhost to slave. Thus all writes go to server 1.
Server 1 can benefit from using server 2 for reads.
You can balance load between the two servers and it will work.
If server 2 goes down, everything continues working as usual.
If server 1 goes down, wiki is read-only and you can't see the
images. The server admin can easily promote it to master and
recover (but make sure that when server 1 restores acts as slave!
Two servers receiving writes will break the system!).