session persistance based on session id parameter

have u seen this one? is it applicable?

 

 

sol7392: Overview of universal persistence

 

http://support.f5.com/kb/en-us/solutions/public/7000/300/sol7392.html

 

 

hth

sorry but its not applicable, there is no cookie within http request. session id is passed within xml code (tcp payload in captured packets)

How about using this one as a start:

 http://devcentral.f5.com/Community/GroupDetails/tabid/1082223/asg/50/aft/33541/showtab/groupforums/Default.aspx1198671
when CLIENT_ACCEPTED {

    set timeout 3600
    set analyse_server 1
    TCP::collect
}

when CLIENT_DATA {
    log local0. "Client Data______________________________"
    set jsessionid [findstr [TCP::payload] "JSESSIONID=" 11 32]
    log local0. "VALUE jsessionid CLIENT: $jsessionid !"
    if {$jsessionid != ""}{
        log local0. "JSESSIONID is present on the Client , persisting "
        log local0. "connection [IP::remote_addr]:[TCP::remote_port] to [IP::local_addr]:[TCP::local_port]"
        persist uie $jsessionid
        set analyse_server 0
        TCP::release
    } else {
        set analyse_server 1
        log local0. "JSESSIONID is Not present"
        TCP::release
    }
}

when SERVER_CONNECTED { 
    TCP::collect 
}
when SERVER_DATA {
    log local0. "Server Data______________________________"
    set jsessionidsrv [findstr [TCP::payload] "JSESSIONID=" 11 32]
    if ($analyse_server!=0) {
        log local0. "VALUE jsessionid SERVER: $jsessionidsrv !"
        if {$jsessionidsrv != ""}{
            log local0. "JESSIONID detected from server , creating persistence entry "
            log local0. "connection [IP::client_addr]:[TCP::local_port] to[IP::remote_addr]:[TCP::remote_port]"
            persist add uie $jsessionidsrv $timeout
            TCP::release
        } else {
            log local0. "JESSIONID is Not Present : this is NOT NORMAL"
            TCP::release
        }
    } else {
        log local0. "connection [IP::client_addr]:[TCP::local_port] to [IP::remote_addr]:[TCP::remote_port]"
        TCP::release
    }
    log local0. "ENDING SERVER SIDE ANALYSIS"
}
when LB_FAILED {
    log local0. "________LB failed_____________"
}

when PERSIST_DOWN {
    log local0. "________PERSIST DOWN_____________"
}

Aaron

Thx Hoolio

 

 

It is working. Is it possible to find string ""JSESSIONID": " (with additional quot marks?)

 

Thank you anyway for support

 

 

BR

 

Greg

Sure, just escape the double quotes with backslashes:

 

 

set jsessionid [findstr [TCP::payload] \""JSESSIONID=\"" 13 32]

 

set jsessionidsrv [findstr [TCP::payload] \""JSESSIONID=\"" 13 32]

 

 

Aaron

Thank you

 

I have managed to adapt your solution to my case :)

 

 

Still have some problems.

 

How we can realize fail-over with such created persistence?

 

As I know already LB_FAILED is triggered when LTM is ready to send the request to a pool member and one hasn’t been chosen (the system failed to select a pool or a pool member), is unreachable (when no route to the target exists), or is non-responsive (fails to respond to a connection request).

 

i found only:

 

when LB_FAILED {

 

if { [active_members [LB::server pool]] > 0 } {

 

catch { LB::down }

 

LB::mode rr

 

LB::reselect

 

}

 

}

 

But in my case persistence need to be also updated with new server ip.

 

Do you have some idea how to use LB_FAILED event in correct way?

 

 

BR

 

Greg

The persistence would be updated if you reselect a new pool member in LB_FAILED and the server sends a JSESSIONID that you parse in SERVER_DATA.

 

 

Aaron