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Xhuxhu's avatar
Xhuxhu
Icon for Nimbostratus rankNimbostratus
Jan 12, 2021
Solved

Zero downtime deployment with f5 GTM+LTM

We have a GTM+LTM set up for our application which is running on 12 servers. This servers are separated in 4 LTMs with 3 servers each with monitoring set to a static page and "Action on service down"...
application delivery
BIG-IP
LTM
  • jaikumar_f5's avatar
    jaikumar_f5
    Jan 15, 2021

    GTM does also play a role here, I'd say before you mark down the respective ltm's servers, mark the GTM Pool member as disabled too. In that way the DNS resolution goes to other VIP's. Also how's your GTM setup configured here, RR ? How many GTM pools ? etc etc.

     

    Also before you mark start your deploy, always check if there's any existing connections coming to the VIP.

    Because they have to tcp time out before you start you deploy. Else when the subsequent request comes to the pool member, its obvious it would get dropped & you'll see client impact.

     

    Hope these helps.

jaikumar_f5's avatar
jaikumar_f5
Icon for Noctilucent rankNoctilucent
Jan 15, 2021

GTM does also play a role here, I'd say before you mark down the respective ltm's servers, mark the GTM Pool member as disabled too. In that way the DNS resolution goes to other VIP's. Also how's your GTM setup configured here, RR ? How many GTM pools ? etc etc.

 

Also before you mark start your deploy, always check if there's any existing connections coming to the VIP.

Because they have to tcp time out before you start you deploy. Else when the subsequent request comes to the pool member, its obvious it would get dropped & you'll see client impact.

 

Hope these helps.