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Preet_pk's avatar
Preet_pk
Icon for Cirrus rankCirrus
Apr 25, 2022

Host based irule & URI to point to backend pool

Hi, We have a requirement to forward application access to backend server pool based on "host" and "uri". Below is the requirement. If host is "abc.local.ae" & uri is "/malla"  -> then pool - "abc...
application delivery
  • Mayur_Sutare's avatar
    Mayur_Sutare
    Apr 29, 2022

    Hi Preet_pk 

    If site/url is not working after mapping pool directly to the vServer then the issue is something else. 

    Can you verify below configurations ?

    1. SNAT settings on the vServer. If backend server's default gateway is not F5 then make sure to enable SNAT settings. You can set it to AUTOMAP.

    2. Is your pool showing up on the F5? Check if you have correct routing on the F5 to reach backend server.

    Once this is sorted. then you can test the iRule.

Mayur_Sutare's avatar
Mayur_Sutare
Icon for MVP rankMVP

Hi Preet_pk ,

I agree with PSFletchTheTek , LTM policy will be more easier & also those are more faster when it comes to execution. Still if you want to user iRule, you can refer below irule for your use case.

 

when HTTP_REQUEST {

if {[HTTP::host] equals "abc.local.ae"} {
    
    if {[HTTP::uri] contains "malla"} {
       
        pool abc-pool:8080
    } elseif {[HTTP::uri] contains "mise"} {
        
        pool abc-pool:8081
    } 
}

}

Hope it helps!

Preet_pk's avatar
Preet_pk
Icon for Cirrus rankCirrus
Apr 29, 2022

Hi,

Thanks for sharing the irule, tested the irule but it is not work. Below is the configuration details. Tried creating seperate VS & applied pool abc-pool:8080 directly for tesing instead of irule - still it is not working. Please let me know if F5 will not process traffic if, we are using port 443 on VS &  backend server on port 8080 - as i am not able to see any traffic statistics on pool members while testing the connectivity & in browser getting "PR_CONNECT_RESET_ERROR" . Even in Packet capture can see F5 VS ip resetting the traffic to client ip address - instead of processing backend server connectivity.

VS:

10.120.10.10    Port 443

Backend irule:

when HTTP_REQUEST {

if {[HTTP::host] equals "abc.local.ae"} {

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

pool abc-pool:8080
} elseif {[HTTP::uri] contains "mise"} {

pool abc-pool:8081
}
}

}