persistence and NAME::lookup queries

All,

 

 

I'm trying to, upon HTTP request, determine if persistence already exists for a connection (using source IP) and use the pool that they are already using. If there is no persistence, I want do to a DNS lookup and then, based upon my answer, use a certain pool.

 

 

Here's my rule as is:

 

 

when HTTP_REQUEST {

 

 

Get the source IP address

 

set client_ip [IP::remote_addr]

 

 

Do a persistence lookup for the source IP

 

set persistence_pool [persist lookup source_addr $client_ip pool]

 

 

See if there's already a session for the source IP and

 

use the pool already assigned

 

if { $persistence_pool ne "" } {

 

 

use pool $persistence_pool

 

 

} else {

 

 

Do the lookup

 

[NAME::lookup $client_ip]

 

 

}

 

 

}

 

 

when NAME_RESOLVED {

 

 

set in_my_domain [NAME::response address 0]

 

 

Direct to corresponding pool based answer

 

if { $in_my_domain ne "" } {

 

use pool HTTP_my_domain_pool

 

} else {

 

use pool HTTP_not_my_domain_pool

 

}

 

 

HTTP::release

 

 

}

 

 

I get the following in the ltm log:

 

 

TCL error: Rule HTTP_my_domain_check_rule - Prerequisite operation not in progress (line 5) invoked from within "persist lookup source_addr $client_ip pool"

 

 

so obviously I need to start something ahead of this persistence lookup I would imagine, but what? Any help greatly appreciated. I've searched and browsed a lot throughout here but I don't see any specific references to using the persist lookup ability (other than the documentation example).

 

 

Please don't be afraid to point out other errors throughout the script either. I can take it!

 

 

Thanks.

 

 

-madefiver