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Shu_97237's avatar
Shu_97237
Icon for Nimbostratus rankNimbostratus
Jul 12, 2012

Dispatch messages from a single connection to pool members

Hi,     I'm trying to write irules to do message-based load balancing. I am not using SIP/radius/diameter, so cannot use an existing profile. The request messages are all sent over a single TCP...
application delivery
dev
devops
iRules
nitass's avatar
nitass
Icon for Employee rankEmployee
Jul 14, 2012
this is my testing. client sends 2 http requests in 1 tcp connection. each request is load balanced to each pool member.

in irule, i determine end of each request by looking for \r\n\r\n. 

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
   profiles {
      mblb {}
      tcp {}
   }
}
[root@ve10:Active] config  b pool foo list
pool foo {
   members {
      200.200.200.101:80 {}
      200.200.200.102:80 {}
   }
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when CLIENT_ACCEPTED {
   log local0. "client: [IP::client_addr]:[TCP::client_port]"
   log local0. "virtual: [IP::local_addr]:[TCP::local_port]"
   TCP::collect
}
when CLIENT_DATA {
   log local0. "request: [TCP::payload]"
   if {[TCP::payload] ends_with "\r\n\r\n"} {
      TCP::release
      TCP::notify request
   }
   TCP::collect
}
when SERVER_CONNECTED {
   log local0. "node: [IP::remote_addr]:[TCP::remote_port]"
   TCP::collect
}
when SERVER_DATA {
   log local0. "response: [TCP::payload]"
   TCP::release
   TCP::notify response
   TCP::collect
}
when SERVER_CLOSED {
   log local0. ""
}
when CLIENT_CLOSED {
   log local0. ""
}
}

/var/log/ltm
Jul 14 16:35:00 local/tmm info tmm[5111]: Rule myrule : client: 172.28.19.251:37382
Jul 14 16:35:00 local/tmm info tmm[5111]: Rule myrule : virtual: 172.28.19.79:80
Jul 14 16:35:00 local/tmm info tmm[5111]: Rule myrule : request: GET / HTTP/1.0  User-Agent: ApacheBench/2.0.40-dev  Connection: Keep-Alive  Host: 172.28.19.79  Accept: */*
Jul 14 16:35:00 local/tmm info tmm[5111]: Rule myrule : node: 200.200.200.102:80
Jul 14 16:35:00 local/tmm info tmm[5111]: Rule myrule : response: HTTP/1.1 200 OK  Date: Sat, 14 Jul 2012 08:35:19 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  Keep-Alive: timeout=15, max=100  Connection: Keep-Alive  Content-Type: text/html; charset=UTF-8      This is 102 host.  
Jul 14 16:35:00 local/tmm info tmm[5111]: Rule myrule : request: GET / HTTP/1.0  User-Agent: ApacheBench/2.0.40-dev  Connection: Keep-Alive  Host: 172.28.19.79  Accept: */*
Jul 14 16:35:00 local/tmm info tmm[5111]: Rule myrule :
Jul 14 16:35:00 local/tmm info tmm[5111]: Rule myrule : node: 200.200.200.101:80
Jul 14 16:35:00 local/tmm info tmm[5111]: Rule myrule : response: HTTP/1.1 200 OK  Date: Sat, 14 Jul 2012 08:47:25 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  Keep-Alive: timeout=15, max=100  Connection: Keep-Alive  Content-Type: text/html; charset=UTF-8       This is 101 host.  
Jul 14 16:35:00 local/tmm info tmm[5111]: Rule myrule :
Jul 14 16:35:00 local/tmm info tmm[5111]: Rule myrule :