[Linux-HA] Secondary Interfaces, and Host Names
andrew at beekhof.net
Fri Jul 24 07:21:14 MDT 2009
On Tue, Jul 21, 2009 at 2:55 PM, Karl W. Lewis<karl.w.lewis at gmail.com> wrote:
> So, I'm setting up a web server on an HA-Linux Cluster using heartbeat v2.99
> and Pacemaker.
> I'm setting it up on a set of three Egenera blades. These blades have no
> actual network interfaces, that is handled by the frame. So, there are the
> interfaces over which the web server will talk to the world, and a virtual
> IP Address managed by the cluster, and I have set up a "private" network
> that he cluster can use to chat that is not connected to any other network.
> I've assigned IP addresses for that virtual interface on each blade, but now
> I have a question that I fear will reveal my ignorance...
> How do I relate the private network IP Addresses to each host? Currently,
> the public addresses for each host are associated with the hosts in the
> /etc/hosts file. And, those names are the ones that you get if you do a
> `uname -n` on any of the blades. Should I use the private network addresses
If you want to be able to have those IPs move to another node if the
normal owner dies, then yes.
Otherwise, it probably doesn't matter too much.
> My ha.cf file contains the line: bcast eth1 eth0. eth1 is for the
> private network, but it occurs to me that heartbeat can't know how to get to
> the other nodes over eth1 because I've not told it what those addresses
> Should I re-write my hosts file such that the private addresses are
> the ones associated with the proper host names?
> Since these are egenera blades, I can't use serial/null modem cables to
> connect the cluster as the blades don't have any of those, either.
> My google skilz, such as they are, have failed me... I have been unable to
> find any details of a setup like this. I'd be most appreciative if anyone
> could provide any tips, pointers, or practical examples.
> Linux-HA mailing list
> Linux-HA at lists.linux-ha.org
> See also: http://linux-ha.org/ReportingProblems
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