Came across some interesting and useful stuff when doing HA on my Linux boxes. I thought I share it here.
Heartbeat, Corosync, Pacemaker?
This article talks about the functions of the various functions of the different components, namely Heartbeat, Corosync and Pacemaker. This should clear the doubt for beginners on the functions of the various components in a Linux HA setup.
A tool that I discovered from LinBits, i.e. the folks behind DRBD.
DRBD Management Console
This DRBD management console is named wrongly. It should be called the Linux System Management Console. With this GUI, you can:
1. Manage your disks. This includes creating/deleting/resizing the volume group/logical volume, the underlying DRBD resource, the filesystem, all in one action.
2. Manage Virtual Machines. KVM is supported.
3. Setting up and managing HA clusters from scratch. No struggling with the “crm configure” mumbo-jumbo.
This significantly lowers the bar for people who wants to try out clustering, DRBD etc.
I’m building a HA cluster running a couple of services right now. After which i will share the details of my setup with everyone here.