Cluster failure reason

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Operating Systems AIX Cluster failure reason
# 1  
Old 01-24-2014
Network Cluster failure reason

Hi guys !
I'm a French IT student in AIX, and i'm note very fluent in english.

I have a task : Write a script to inform the administrator if on of a cluster UC is not working. I'm not going to ask you the script ^^'

But i want to make a list of the failure reason of a cluster (network, process, ...)

I f you any link or answer it will be great
# 2  
Old 01-24-2014

as far as I know each node of a cluster will be already monitored by the cluser software itself (Bull ARF, IBM HACMP). In case of a failure the software will inform you, at least with a mail to root. In a simple solution You have just to forward this mail (e.g. user /etc/aliases).

# 3  
Old 01-24-2014
Ya actually the final aim is not to use the IBM cluster software (HACMP, powerHA)
The aim is the detect a failure in of the cluster UC, and switch manually to another UC.

That's why, i'm making the list of all possibles reasons of a cluster UC failover.
# 4  
Old 01-24-2014

- LAN (ping, default gateway, routes, ...)
- SAN (disk errors, failed paths, IO errors (lvm_io_fail), ..)
- rootvg (disk errors, mirroring)
- errpt (permanent hardware errors, ...)

Monitoring the errpt for permanet hardware errors is a good start Smilie

This User Gave Thanks to -=XrAy=- For This Post:
# 5  
Old 01-24-2014
Thank you,

I can i check the gatway because the ping and traceroute command don't specify the gateway

---------- Post updated at 03:41 PM ---------- Previous update was at 03:18 PM ----------

Do you know how its working the IBM "active dead gateway detection" ?
The format of the standard output ?
# 6  
Old 01-24-2014
keep in mind the server may not respond respond (frozen or crashed) in which case your monitoring has to also take in account form an external point of vue (can I ping and connect to...)
# 7  
Old 01-24-2014
I'd take a different starting point. Instead of looking for possible failures I'd define what resources have to be up and running to say that the cluster node is ok. If you keep in mind that the final goal of a cluster is to garantee the availability of a service and not the detection of errors your script may look a bit different, while the list of resources is pretty much what XrAy wrote.
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