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Domai's avatar
Domai
Icon for Altostratus rankAltostratus
Jun 12, 2014

GTM load balancing question

Hello guys, My question is related to GTM lb method. Lets assume that a pool for a wide ip has 3 virtual servers. The requirement is that when the first VS goes down the traffic should go to the second VS and should remain with the 2nd VS even if the 1st VS comes back up. And further down the road if the 2nd VS goes down the traffic should be sent to the 3rd VS only...so on and so forth. Is this possible? With out using manual resume of course :-)

 

Thank you

 

availability
BIG-IP DNS
management
sap

4 Replies

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  • mimlo_61970's avatar
    mimlo_61970
    Icon for Cumulonimbus rankCumulonimbus
    Jun 12, 2014

    Are the 3 virtual servers behind LTMs, and are these LTMs configured as Servers on the GTM?

     

    If so, I think you could use the manual resume option on the LTM monitor. Once the LTM marks it down it should keep it down, and the GTM would reflect this.

     

  • Cory_50405's avatar
    Cory_50405
    Icon for Noctilucent rankNoctilucent
    Jun 12, 2014

    And if your servers are not behind an LTM, you could use global availability load balancing with manual resume enabled on your GTM pool.

     

  • Domai's avatar
    Domai
    Icon for Altostratus rankAltostratus
    Jun 12, 2014

    In case if I opt for manual resume then app team should notify me when they bring down the server every time. I am just wondering how others deal with such a requirement.

     

  • Cory_50405's avatar
    Cory_50405
    Icon for Noctilucent rankNoctilucent
    Jun 12, 2014

    You could use an external monitor to check for the existence of a file for example and mark pool member availability accordingly. This puts the ability to bring the server up and down into the hands of the server admins.

     

    We do this with an external monitor that logs into a server and runs a script and marks the node up or down based on the script output.