Forum Discussion
visi10_150385
Nimbostratus
NimbostratusForwarded health check
Hi All,
I have application configured in the way:
Users -> f5 -> server[1,2]_apache -> server[1,2]_app .
On load balancer there is pool with nodes:
server1_apache:port
server2_apache:p...
If there's some content on server1_apache:port/app_page that can be used to determine the health of the application server, then this could be done. So for example if you setup a page on your app server as /app_page/health and populate it with something that accurately reflects the health of your application, then you could use an HTTP monitor to run a GET /app_page/health and set an appropriate receive string.
Cory_50405
Noctilucent
NoctilucentSounds like you have two real options:
- Modify firewall rules to permit health checking from your LTM to the app server(s).
- Institute some type of health checking between your Apache tier and your application server tier.
If the LTM can't directly query your application servers, then it isn't going to be able to do so through the Apache servers without an external monitor that logs into your Apache servers and then initiates some kind of test communication from there to your application servers. Just thinking out loud, but this may not even be feasible. Seems like both options one and two above would be easier approaches.