How to sniff node down

Thanks for your response. It looks like the answer I was looking for is the BIGIP_MCPD_MCPDERR_NODE_ADDRESS_MON_DOWN event. I didn't find it anywhere in the documentation regarding nodes. I wanted to find a NODE_DOWN event in iRules that I could program around to send me the notification when that event was raised and judging from the name I'll assume that's it.

 

 

Thanks.

 

I haven't tried this, but you could use something like this (I think you need version 9.2 for the LB::status query):

 

 

when LB_FAILED {

 

if { [LB::status poolname ip port] == 0 } {

 

log "Server $ip $port down!"

 

}

 

}

 

 

Then configure syslog-ng to page/email you when you get that entry in /var/log/ltm

 

 

The developers might have a better solution for you

 

 

You're close...

The LB::status section would evaluate a little differently.

Exerpt from Click here - http://tech.f5.com/home/bigip-next/manuals/bigip9_2/bigip9_2config/BIG_IP9_2ConfigGuide-14-1.htmlwp1200312

iRule command

LB::status

LB::status node

LB::status pool member

Description

Returns the status of a node. Possible values are up, down, session_enabled, and session_disabled. If you supply no arguments, returns the status of the currently-selected node

So you'd have something like:

when LB_FAILED {
  if { [LB::status pool  member  ] eq "down" } {
    log "Server $ip $port down!"
  }
}

-Colin

I can't seem to find a good reference for things like LB::status and BIGIP_MCPD_MCPDERR_NODE_ADDRESS_MON_DOWN so I can see what all I can do with iRules. Could you please point me in the right direction? You are correct about using version 9.2 for the LB::Status though. I'd downloaded documentation for 9.0 and have been referring to it and find that it doesn't discuss querying Node Status. I still haven't seen anything about BIGIP_MCPD_MCPDERR_NODE_ADDRESS_MON_DOWN though so there's still some documentation around that I haven't uncovered.