F5 Redirection

may we check http status and make redirection?

 

 

HTTP::status

 

https://devcentral.f5.com/wiki/iRules.http__status.ashx

Hi Nitass,

 

 

thanks for suggestion. But will it work for all pools called in one irule. or i will require to create seperate irule for seperate pool.

i thought you have 1 virtual server with 1 pool containing 2 servers and when 1 url is not working (e.g. /integration-mag-china), that url on both servers are not working (since both servers may connect to same external resource).

 

 

so, i think we just assign the http status irule to the virtual server.

 

 

please let me know if i misunderstood anything here.

 

Hi Nitass,

 

 

you are right. this is the case. Pool members containg multiple database, so if one of the DB goes down and even server is UP with same service, it should be detected by irule and redirection should work

Hi Nitass, http status irule link given is actually not working. can you please tell me which irule to be setup, it gives some syntax error

e.g.

[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 {
      http {}
      tcp {}
   }
}
[root@ve10:Active] config  b pool foo list
pool foo {
   members 200.200.200.101:80 {}
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_RESPONSE {
   if {[HTTP::status] == 503} {
      HTTP::redirect "http://www.google.com"
   }
}
}

 on client

[root@centos251 ~] curl -I http://172.28.19.79
HTTP/1.0 302 Found
Location: http://www.google.com
Server: BigIP
Connection: close
Content-Length: 0

 on bigip

[root@ve10:Active] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.19.251(49585) <-> 172.28.19.79(80)
1349270493.5390 (0.0010)  C>S
---------------------------------------------------------------
HEAD / HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.19.79
Accept: */*

---------------------------------------------------------------

New TCP connection 2: 200.200.200.10(49585) <-> 200.200.200.101(80)
1349270493.5401 (0.0009)  C>S
---------------------------------------------------------------
HEAD / HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.19.79
Accept: */*

---------------------------------------------------------------

1349270493.5422 (0.0021)  S>C
---------------------------------------------------------------
HTTP/1.1 503 Service Temporarily Unavailable
Date: Wed, 03 Oct 2012 13:37:49 GMT
Server: Apache/2.2.3 (CentOS)
Retry-After: 18000
Connection: close
Content-Type: text/html; charset=iso-8859-1

---------------------------------------------------------------

1349270493.5423 (0.0032)  S>C
---------------------------------------------------------------
HTTP/1.0 302 Found
Location: http://www.google.com
Server: BigIP
Connection: close
Content-Length: 0

------------------------------------------------------

Thanks Nitass