Forum Discussion
William_Will_13
Nimbostratus
NimbostratusLTM 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
| | ...
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.
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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
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IheartF5_45022
Nacreous
NacreousThere 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_carrCirrostratus
"Use monitors assigned to the Webserver nodes (not the pool)" == assigning monitors directly to the pool members.- IheartF5_45022Yes thanks fort that - it had already occurred to me that I had misrepresented that and meant to fix it but you were too quick!