Issues load balancing web servers

Hi Harris,

 

 

wondering where is the backend server default gw? it's point to F5 floating IP? if not, you might need to either change the server gateway point to F5 or enable snatautomap. this is because we need to force the return path back to F5 LTM.

 

maybe you might want to test telnet backend server port 80 from F5 LTM, just to make sure not layer 2 problem.

 

 

for your first question, wondering is both backend servers consists both applicaitons (houseloan and studentloan) content? if yes, we can use iRule to insert the particular uri for the applicaiton when it hit the correct VS.

 

example:

 

assuming your have VS 10.2.1.3 is for houseloan and 10.2.1.4 is for studentloan.

 

 

VS

 

------

 

VS_houseloan (pool members webserver1 and webserver2)

 

VS_studentloan (pool members webserver1 and webserver2)

 

 

write an irule,

 

when HTTP_REQUEST {

 

if { [HTTP::uri] contains "houseloan" } {

 

pool houseloan_pool

 

} else {

 

HTTP::redirect "http://[HTTP::host]houseloan"

 

}

 

}

 

 

* note: you might need to tweak the irule base on your application behavior

 

 

associate this irule to VS_homeloan.

 

 

with this configuration, F5 will do the uri redirection instead of backend server.

 

once the traffic get load balance to the backend server with the correct URI, backend server should be able to send the request to the correct path, in this case will be houseloan path.

 

 

do the same steps for studentloan.

 

 

hope it works for you.

 

 

regards,

 

KY