Index of /code/perl/takeover

 Name                    Last modified       Size  Description

 Parent Directory        11-Nov-2007 18:48      -  
 0.2.0/                  19-Jun-2006 19:52      -  

Some thoughts about clustered servers

Jani Reinikainen, devel (at) reinikainen.net

Normal operation

• Master constantly mirrors to Backup using FAM/IMON/Rsync.
• MySQL handles itself in all cases, if two-way replication is used.
• rsync needs to be installed on ALL nodes in the cluster.

Switching over to a backup node

On backup node:

1. Fake the IP (fake [master node IP])
2. Check that FTPd is running
3. Check that MTA is running
4. Check that WWW server is running
5. My Perl script here

Switching over from a backup node

On Master node:

1. Check that FTPd is running
2. Check that MTA is running
3. Check that WWW server is running

On backup node:

1. Close FTPd
2. Close MTA
3. Rsync changed data to Master
4. Un-fake the IP (fake remove [master node IP])
5. My Perl script here