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johnfilo_45702's avatar
johnfilo_45702
Icon for Nimbostratus rankNimbostratus
Jul 20, 2010

Long Persistent Sessions and no outage deployments

OK, my first post so go easy!!     My company is about to embark on deploying F5's in our environment and I would appreciate some thoughts on how I can go about solving a problem I have with lon...
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Hamish's avatar
Hamish
Icon for Cirrocumulus rankCirrocumulus
Jul 22, 2010
OK. Re-reading the requirements a few times, I originally though no... But wasn't considering the None option of action on service down. That would implement your draining scenario perfectly.

 

 

I'm not sure you have a problem when you've finished upgrading the first server and then want to drain the second... Once the first is up and taking new sessions, place the second server into DOWN mode... AOSD with None will continue to send existing connections to it just like it did for the first option.

 

 

I'm not sure you'd want to leave it in None when in normal/normal operation... But it should work. You'll need to monitor elsewhere, and if the DRAINING server suddenly goes down, you'll have to set to 'Reselect' or 'RST' so people with existing sessions recover. But overall I think it's doable.

 

 

 

H