[Linux-HA] Single Point of Failure
paul at paulororke.net
Thu Jan 12 13:20:04 MST 2012
Please excuse me if this is documented and I failed to find it. I have
been investigating ha-linux to provide Business Continuity in our mail
server. Currently we have a single mail server in our main office. We
would like to set up a second server in a geographically different location
and make a cluster of 2 nodes so that we can continue doing business if one
As far as I can tell ha-linux with Pacemaker is ideally suited to this. My
question is around how the cluster handles requests to the mail server(s).
Can anyone suggest some appropriate reading for where/how this is
handled? My concern is that should there be a failure at the location
that is receiving the requests how does it know to use the second node? Is
this typically done through zone files and an priority? Obviously I am
missing some important reading here because it would seem to me that there
could still be a single point of failure and that doesn't seem right.
What am I missing?
Please and thanks
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