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Kris__109062's avatar
Kris__109062
Icon for Nimbostratus rankNimbostratus
Jun 16, 2008

Odd results with iRule on virtual server selecting random pool member

Hi,     I have the following iRule setup on a Virtual Server of Type "Standard" using the "TCP" profile which has a custom Source Address Affinity persistence profile with a timeout of 1800...
application delivery
dev
devops
iRules
Kris__109062's avatar
Kris__109062
Icon for Nimbostratus rankNimbostratus
Jun 17, 2008
Hi,

Thanks for the tip on getting the default pool for a virtual server.

I managed to sort this issue out by using a smaller byte parameter (50 bytes not 100 bytes) with TCP:collect 

   
 when CLIENT_ACCEPTED { 
         if { [TCP::local_port] == 80 } { 
                  set default_pool [LB::server pool] 
                  TCP::collect 50 
         } 
 } 
 when CLIENT_DATA { 
                 if { [ findstr [TCP::payload] "rand=" 5 4] equals true} { 
                     set daStr [ findstr [TCP::payload] "rand=" 5 4] 
                     log local0. "rand= found" 
                     if { $daStr equals "true" } { 
                          set cserver [lindex [active_members -list $default_pool] [expr {int(rand()*[active_members $default_pool])}]] 
                          set ip [lindex $cserver 0] 
                          pool $default_pool member $ip 
                          persist none 
                     } 
                  } 
 }