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Forum Discussion

Venkat_Raj_2350's avatar
Venkat_Raj_2350
Icon for Nimbostratus rankNimbostratus
Aug 08, 2016

iRule to check for the page content and force-offline node in a pool

Hi,   I have a pool with 4 members and each server has a html page setup as /TomCatCount.html. If the count is high then the page will display "Above Threshold" and if the count comes down "Below ...
devops
iRules
LTM
page content
Kai_Wilke's avatar
Kai_Wilke
Icon for MVP rankMVP
Aug 08, 2016

Hi Venkat,

if a node is marked as "down" by an monitor, then its comparable to set this node manually as "Force-offline", since it does not receive any new and even persistent sessions.

The 

[LB::down]
command will force an fresh health monitor probe and would also mark the node temporary as "down" till the health monitor check has completed. The result of the health monitor will then keep the node "down" or flip it immediately back to "online". So i guess there is no benefit using this command...

What the is your detailed requirement and what missing when a monitor is marking a node as "down"? Should LTM also kill any ongoing sessions to this node?

Cheers, Kai