What's the difference between keepalived and corosync, others?

Posted by Matt on Server Fault See other posts from Server Fault or by Matt
Published on 2012-11-06T03:20:26Z Indexed on 2012/11/06 5:05 UTC
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linux

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high-availability

I'm building a failover firewall for a server cluster and started looking at the various options. I'm more familiar with carp on freebsd, but need to use linux for this project.

Searching google has produced several different projects, but no clear information about features they provide . CARP gave virtual interfaces that failover, I am not really clear on whether that's what corosync does, or is that what pacemaker does?

On the other hand I did get manage to get keepalived working. However, I noted that corosync provides native support for infiniband. This would be useful for me.

Perhaps someone could shed some light on the differences between:

corosync
keepalive
pacemaker
heartbeat

Which product would be the best fit for router failover?

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