Forum Discussion
AltostratusURL Distribution
Not at all tested or optimized or secured against injection with the table commands, but to get the juices flowing I threw this together. Not 100% confident it'll work and I don't have time until end of the week to flesh out and test, but it is possible to achieve what you're after. That said, it'll be a support nightmare to grow with the needs of the business since it's not a well-defined problem or scale, so I would push back against this particular ask.
when HTTP_REQUEST priority 500 { if { [string tolower [HTTP::path]] == "/form"} { foreach form [list form1 form2 form3 form4 form5 form6] { if { [table lookup $form] < 50 } { table incr $form 1 HTTP::uri /$form set current_form $form break } } } } when HTTP_REQUEST priority 501 { if { [string tolower [HTTP::path]] == "/form" } { HTTP::respond 429 content "<html><body><p>All forms at max of 50 requests</p></body></html>" } } when HTTP_RESPONSE { table incr $current_form -1 }
MVPHi walkman69,
I am randomly guessing, that each form1-6 is server by a different pool member. If my assumption is right, you can set a session limit per node and use Least Connections method for load balancing.
root@(awaf)(cfg-sync Standalone)(Active)(/Common)(tmos)# list ltm node 10.0.2.50
ltm node 10.0.2.50 {
address 10.0.2.50
connection-limit 50
}
Then I would do the URL rewriting on the web server in the backend. Doing application logic on the BIG-IP is possible, but sometimes it's just... meh... Uti, non abuti.
Maybe you can explain your requirements a bit more in details, so we can suggest a better solution.
KR
Daniel
- walkman69
Hi Daniel_Wolf! This is not node/member specific. All forms will reside on all servers in the same pool(s) and those servers it is just this one particular form/webpage that needs this type of distribution as the servers also handle traffic for other websites, so the connection limit cannot be set on a node basis. I definitely agree this is something that should be done on the web server itself, the dev team just wants to explore all options.
