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William_Will_13's avatar
William_Will_13
Icon for Nimbostratus rankNimbostratus
Nov 06, 2013
Solved

LTM Load Balancing with backend monitoring

Hi all, I have a design question that i would like to know if it is achievable using LTM. ______________ LB01 -- SW01 --| Webserver1 |-- Backend1 -- Database1 | | ...
APM
availability
deployment
design
security
  • IheartF5_45022's avatar
    IheartF5_45022
    Nov 06, 2013

    There are a few ways;

     

    • Have the healthchecks to the Webservers trigger checks from the Webserver to the relevant Backend/Database servers. This doesn't really involve the F5 (apart from the Webserver pool), but is a good solution as it checks that the WebServer can reach it's assigned backend/database servers.

       

    • Use monitors assigned to the Webserver nodes (not the pool) that have alias addresses. You'd assign one monitor for the Backend and one for the database server assigned to each Web server node. You'd also have a monitor (with no alias) assigned to the Webserver pool.

       

    • Rearchitect so that you don't have such a tightly coupled hierarchy. Use a virtual for the Web Servers to talk to the backedn servers, and for the backend servers to talk to the database servers.

       

    Joanna

     

IheartF5_45022's avatar
IheartF5_45022
Icon for Nacreous rankNacreous

There are a few ways;

 

  • Have the healthchecks to the Webservers trigger checks from the Webserver to the relevant Backend/Database servers. This doesn't really involve the F5 (apart from the Webserver pool), but is a good solution as it checks that the WebServer can reach it's assigned backend/database servers.

     

  • Use monitors assigned to the Webserver nodes (not the pool) that have alias addresses. You'd assign one monitor for the Backend and one for the database server assigned to each Web server node. You'd also have a monitor (with no alias) assigned to the Webserver pool.

     

  • Rearchitect so that you don't have such a tightly coupled hierarchy. Use a virtual for the Web Servers to talk to the backedn servers, and for the backend servers to talk to the database servers.

     

Joanna

 

rob_carr's avatar
rob_carr
Icon for Cirrostratus rankCirrostratus
Nov 06, 2013
"Use monitors assigned to the Webserver nodes (not the pool)" == assigning monitors directly to the pool members.