[Linux-HA] (no subject)

[Michael Schwartzkopff]

Am Mittwoch, 11. Juni 2008 08:45 schrieb Schmidt, Florian:
> Hi everybody,
>
> after 3 months of studies, I'm back on my HA-cluster. =)
>
> First thing to do is now to integrate something to send some information to
> an admin if errors occur (heartbeat-link dead, failed to start some
> resource etc.). I don't find any documentation about the MailTo RA on the
> linux-HA website and so does google. What's the way to integrate this?
>
> Is it powerful enough to send different messages in case of different
> errors? If it isn't: what's the better way to do this?
>
> Regards,
>
> Florian

Hi,

MailTo sends a mail every time it is started or stopped. If you put into a 
group on the last position you will get a mail every time any resource of the 
group changes its state.

But a better way of monitoring would be to use an external network monitoriing 
system (i.e. nagios) to look after the cluster. heartbeat provides a nice 
SNMP subagent that reflects the state of the cluster (nodes, resources). You 
can monitor this state with check_snmp of the external NMS.

Advances:
1) Have a third system monitor the cluster. So you will get notice of the 
whole cluster breaks and cannot send any mail anymore.

2) NMS (i.e. nagios) have a very powerful escalation system which a plain 
MailTo resource cannot provide.

Greetings,
-- 
Dr. Michael Schwartzkopff
MultiNET Services GmbH
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