AW: redundancy

[Sand Philipp]

> >I've got a HA failover cluster on Linux for LPRng, I've
> >considered seeing how Nagios runs in such a configuration.
> >
> >With the Heartbeat projects clustering, the IP address for the
> >Master server can switch between systems. However, the logging
> >and all wouldn't be up to date without something like DRBD.
> 
> We have a setup about to be created here using Linux HA to make a fuly
> redundant Nagios server.  The setup uses an external SCSI disk pack to
> have
> filesystems moving betweens servers.
> 
> ServerA -> disk pack <- ServerB(Nagios process)(drive mounted)
>    |                       |(virtual IP)
> ---+-----------Network-----+-----
> 
> Linux HA on the servers passes the IP addresse between them, and also
a
> filesystem on a mirrored pair of SCSI disks which are visible to both
> servers, but only mounted by the active one.  Linux HA will also
> start/stop
> the Nagios process when a handover occurs.
> 
> In addition, the server *not* running Nagios will have an
> MRTG/RRD/routers2
> installation which also has a separate mirrored disk pair to be passed
> back
> and forth.
> 
> In remote sites, we will have a smaller pair of Nagios servers that do
not
> need the shared disk pack since they send all alerts back to the
central
> Nagios via NSCA.  This should achieve a high level of reliability and
> redundancy, expandability, and minimise the about of times the
individual
> agents need to be queried (previously, we had two identical
> simultaneously-running systems).
> 
> I'll post here in a few months if people are interested to let you all
> know
> how well it ends up working out!

Sounds pretty interesting, keep us up to date ;)

Thanks,
Philipp


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