irule or policy to match url and then update pool members port

Hi Richard,

the LB_SELECTED event is probably not needed to make it work.

AFAIK you cant select a pool member on a port which is not configured in the pool. You may use the "node" command instead to connect to a IP::Addr of your choice. But keep in mind that this would bypass any LB decissions and health monitor checks for a given port on a given pool member... 

when CLIENT_ACCEPTED {
	# Select a pool member based on LB balacing mode
	set lb_node [lindex [LB::select] 3]
}
when HTTP_REQUEST {
	#Check to see if the DataGroup matches a URI call
	set svr_port [class match -value -- [HTTP::uri] starts_with dg_testdg]
	if { $svr_port eq "" } then {
		#DataGroup doesn't match the URI, drop the connection
		#or do something else here
		reject
		return
	}
	#Check to see if a LB decision has already been made for this connection
	if { [LB::server port] eq $svr_port } then {
		# Correct port is already selected. Do nothing and return...
		return
	} elseif { ( [LB::server port] ne "" ) 
		   and ( [LB::server port] ne $svr_port ) } then {
		LB::detach
	}
	node $lb_node $svr_port
}

But this is somehow a mess. It would be far more elegant to create a pool for each port number, apply proper Health Monitoring to the pools and then used the iRule below...

when HTTP_REQUEST {
	#Check to see if the DataGroup matches a URI call
	set svr_port [class match -value -- [HTTP::uri] starts_with dg_testdg]
	if { $svr_port eq "" } then {
		#DataGroup doesn't match the URI, drop the connection
		#or do something else here
		reject
		return
	}
	pool "pool_test.domain.com_$svr_port"
}

You just have to make sure that the Data-Group port number are alligning with the naming of the pool objects...

Cheers, Kai