Forum Discussion

Nimbostratus

Dec 21, 2009

disable virtual server if active members less than x

Hi all,

I am configuring a GTM machine to load balance DNS requests between virtual servers running on viprion machines.

One of the requirements of the configuration needs to be that the GTM will not issue DNS replies with IP addresses of Virtual servers that hold less than x number of nodes.

I figure that I need to create an irule on the Viprion that will monitor active_members of the pool and disable the pool once the minimum is breached.

Or can I do this on the Virtual Server level?

Could you good people give me a nudge in the right direction?

Thanks,

Itamar

13 Replies

The_Bhattman
Nimbostratus
Dec 27, 2009
Hi Itamar,

Even w/o the irule if you have the LTM listed as a server in the GTM the virtual will fail and stop DNS resolution once all the members of the pool are down. Clients who are already connected will remain connected until they are disconnected.

What i am trying to get at is if LTM is already added to the GTM, the LTM will communicate to the GTM that the virtual failed w/o the need for an irule or a special health check - that is ofcourse of you want the VS to fail when ALL members fail.

Thanks,

Bhattman
Solari_86372
Nimbostratus
Mar 11, 2015
This is amazing, a bit of tweaking to my particular scenario works a treat - thanks very much!
- MSK_222682
  Nimbostratus
  Apr 21, 2016
  Hi All, I also have a similar kind of requirement and I have posted my query, scenario at, https://devcentral.f5.com/s/feed/0D51T00006i7dSMSAY Can you please look into this and recommend the correct iRule and GTM settings as I'm new to F5 world. Br, MSK