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Roman_80473's avatar
Roman_80473
Icon for Nimbostratus rankNimbostratus
Nov 17, 2011

Detect if node is half-dead with an iRule?

Hi folks,     I was tasked to monitor app servers in the pool with an iRule (LTM 10.2). I wrote a simple rule which does the following:   if I get into LB_FAILED, I take the node out and res...
application delivery
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devops
iRules
hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
Nov 17, 2011
Hi Roman,

 

 

It sounds like the server is completing a three way handshake to accept the TCP connection, but not responding to the HTTP request. In that case, you could use the 'after' command to set a timer for how long to wait before taking some action. See the second example on the 'after' wki page for details:

 

 

http://devcentral.f5.com/wiki/iRules.after.ashx

 

 

Aaron