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Lobak_187587's avatar
Lobak_187587
Icon for Nimbostratus rankNimbostratus
Feb 16, 2015

redirecting from virtual server to 2 web servers

this is my first time configuring F5, when I configured a pool, set http check on each members and assign it to a virtual server, I thought that was it.

typing IP of virtual server on web browser returns "connection was reset" on firefox.

I searched for other vendors irules and tried below which only redirects to one of pool member.

when HTTP_REQUEST {
 if { [HTTP::uri] eq "/"}  {
     HTTP::redirect "http://192.168.1.98/"
} 
}

How do I make it to actually load balance?

application delivery
devops
iRules

3 Replies

  • amolari's avatar
    amolari
    Icon for Cirrostratus rankCirrostratus
    Feb 16, 2015

    you do not need an irule to perform that. HTTP::redirect will also only send a 3xx to your client and not perform anything between the BIGIP and the backends. Simply assign the pool to the virtual server (resources). The load balancing method is defined at the pool level.

     

  • Lobak_187587's avatar
    Lobak_187587
    Icon for Nimbostratus rankNimbostratus
    Feb 16, 2015

    yes, that is what I just found out. Somehow, IP was used for virtual server is problematic. I don't know why. Changing to different IP solved it.

     

  • StephanManthey's avatar
    StephanManthey
    Icon for Nacreous rankNacreous
    Feb 16, 2015

    Hi Lobak,

     

    as Alexandre already wrote, no iRule will be required.

     

    But I guess there was no SNAT AutoMap configured for your virtual server.

     

    Without SNAT the server will return the response according to it´s routing table.

     

    If the server´s gateway does not point to the BIG-IP you will see an asymmetric traffic flow and the client will simply discard the responses (as they are not coming from the virtual server).

     

    Applying SNAT will force all server´s responses through the BIG-IP.

     

    Thanks, Stephan