Forum Discussion
Tom_Lauwereins_
Nimbostratus
NimbostratusRedirect traffic to same poolmember during 30 minutes
On of our customers want to redirect traffic to the same poolmember during some time.
They want that traffic with the same HTTP Header has to be redirected to the same pool member.
But it has to be working also if there is comming a new request/session with the same HTTP header field, and this for half an hour.
So the LTM has to link the value from the HTTP:header field to the poolmember for a given time value.
Is this possible with an IRule?
Regards
Tom
5 Replies
- nitass
Employee
you can use universal persistence (uie) with 30 minutes timeout.
persist wiki
http://devcentral.f5.com/wiki/iRules.persist.ashx 
Tom_Lauwereins_Indeed that was my suggestion also to the 'app' guys
But they want that a totally new requests possible coming from another server or after a 10 minutes and with the same content for a specific HTTP-header arrives on the same server.
In my opinion, they have to solve this on application level.
Whats your opinion?
Regards
Tom- nitassBut they want that a totally new requests possible coming from another server or after a 10 minutes and with the same content for a specific HTTP-header arrives on the same server. isn't it what universal persistence works? if persistence key is identical even it is a brand new connection, bigip will send to same pool member.
- Tom_Lauwereins_I made the IRule below, but it seems not to work.
Do I have to select something as "Default or Fallback Persistence profile" into the VS?
Now I have selected "None" and enabeled the iRule
when HTTP_REQUEST {
if {[HTTP::header exists "ul3-user"]} {
persist uie [HTTP::header "ul3-user"]
}
} - nitassthis is mine.
[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 { set header "" if {[HTTP::header exists "ul3-user"]} { set header [HTTP::header "ul3-user"] persist uie [HTTP::header "ul3-user"] 1800 } } when HTTP_RESPONSE { log local0. "[IP::client_addr]:[TCP::client_port] -> [IP::local_addr clientside]:[TCP::local_port clientside] -> [IP::remote_addr]:[TCP::remote_port] | $header" } } on client [root@centos251 ~] curl -I http://172.28.19.79 -H "ul3-user: test1234" HTTP/1.1 200 OK Date: Fri, 17 Feb 2012 13:42:47 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@centos251 ~] curl -I http://172.28.19.79 -H "ul3-user: test1234" [root@centos251 ~] curl -I http://172.28.19.79 -H "ul3-user: test1234" [root@centos251 ~] curl -I http://172.28.19.79 -H "ul3-user: xyz5678" HTTP/1.1 200 OK Date: Fri, 17 Feb 2012 13:38:43 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@centos251 ~] curl -I http://172.28.19.79 -H "ul3-user: xyz5678" on bigip [root@ve1023:Active] config b persist show all PERSISTENT CONNECTIONS | Mode universal Value test1234 | virtual 172.28.19.79:80 node 200.200.200.101:80 age 81sec | Mode universal Value xyz5678 | virtual 172.28.19.79:80 node 200.200.200.102:80 age 57sec [root@ve1023:Active] config cat /var/log/ltm Feb 17 05:36:06 local/tmm info tmm[4822]: Rule myrule : 172.28.19.251:45485 -> 172.28.19.79:80 -> 200.200.200.101:80 | test1234 Feb 17 05:36:34 local/tmm info tmm[4822]: Rule myrule : 172.28.19.251:45486 -> 172.28.19.79:80 -> 200.200.200.101:80 | test1234 Feb 17 05:36:37 local/tmm info tmm[4822]: Rule myrule : 172.28.19.251:45487 -> 172.28.19.79:80 -> 200.200.200.101:80 | test1234 Feb 17 05:36:55 local/tmm info tmm[4822]: Rule myrule : 172.28.19.251:45488 -> 172.28.19.79:80 -> 200.200.200.102:80 | xyz5678 Feb 17 05:37:00 local/tmm info tmm[4822]: Rule myrule : 172.28.19.251:45489 -> 172.28.19.79:80 -> 200.200.200.102:80 | xyz5678
