Forum Discussion

Tom_Lauwereins_'s avatar
Tom_Lauwereins_
Icon for Nimbostratus rankNimbostratus
Feb 10, 2012

peristence based on HTTP header field

Hi,     I'm looking for a way to persist http requests based on the http header field.   How to do this via an iRule or is there a more easy way to handle the traffic always to the same pool ...
application delivery
dev
devops
iRules
nitass's avatar
nitass
Icon for Employee rankEmployee
Feb 10, 2012
in case http header value is coming from client side and always shown in all request.

e.g. 

[root@ve1023:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve1023:Active] config  b pool foo list
pool foo {
   members {
      200.200.200.101:80 {}
      200.200.200.102:80 {}
   }
}
[root@ve1023:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   if {[HTTP::header exists "Look-at-Me"]} {
      persist uie [HTTP::header "Look-at-Me"]
   }
}
}

[root@ve1023:Active] config  b persist show all
No Persistence Table Entries were found.

[root@ve1023:Active] config  curl -I http://172.28.19.79 -H "Look-at-Me: helloworld"
HTTP/1.1 200 OK
Date: Sat, 11 Feb 2012 00:19:14 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Fri, 11 Nov 2011 14:48:14 GMT
ETag: "4183e4-3e-9c564780"
Accept-Ranges: bytes
Content-Length: 62
Content-Type: text/html; charset=UTF-8

[root@ve1023:Active] config  b persist show all
PERSISTENT CONNECTIONS
|     Mode universal   Value helloworld
|        virtual 172.28.19.79:80   node 200.200.200.101:80   age 2sec

[root@ve1023:Active] config  curl -I http://172.28.19.79 -H "Look-at-Me: 12345"
HTTP/1.1 200 OK
Date: Sat, 11 Feb 2012 00:15:00 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Tue, 08 Nov 2011 12:26:29 GMT
ETag: "4183f1-30-47e02740"
Accept-Ranges: bytes
Content-Length: 48
Content-Type: text/html; charset=UTF-8

[root@ve1023:Active] config  b persist show all
PERSISTENT CONNECTIONS
|     Mode universal   Value helloworld
|        virtual 172.28.19.79:80   node 200.200.200.101:80   age 23sec
|     Mode universal   Value 12345
|        virtual 172.28.19.79:80   node 200.200.200.102:80   age 3sec