How to obtain obtain member IP from a VIP > Pool

Hi,

 

 

Here are two related commands you can use to get the members and active members for an arbitrary pool:

 

 

http://devcentral.f5.com/wiki/iRules.members.ashx

 

http://devcentral.f5.com/wiki/iRules.active_members.ashx

 

 

If you want to get the current VS's default pool name you can use [LB::server pool] in CLIENT_ACCEPTED.

 

http://devcentral.f5.com/wiki/iRules.lb__server.ashx

 

 

Aaron

Hello Aaron,

 

 

Thanks. The links are very helpful. Is it possible to obtain (in the vip1-irule) a member from VS2/VIP2 according to the persistence rule defined for VS2?

 

 

Best,

 

Can you clarify the scenario? Do you want to look up a persistence record from an iRule on VS1 for a separate pool on VS2? What type of persistence are you using? Are you using a persistence profile and/or iRule?

 

 

Aaron

VS2 is created with a pool and universal persistence over an irule. In VS1's HTTP_REQUEST event, I need to obtain a member from VS2 and have its IP address insert into the HTTP::uri in the VS1's HTTP_REQUEST event. I don't know if this is clear enough. Thanks.

doesn't the active_members Aaron suggested work?

[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 rule myrule list
rule myrule {
   when HTTP_REQUEST {
        log local0. "\[active_members -list foo2\]: [active_members -list foo2]"
}
}
[root@ve1023:Active] config  b pool foo2 list
pool foo2 {
   members {
      200.200.200.102:80 {}
      200.200.200.103:80 {}
   }
}

[root@ve1023:Active] config  curl -I http://172.28.19.79
HTTP/1.1 200 OK
Date: Wed, 11 Jan 2012 00:36:34 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
Set-Cookie: BROWSER=MOZILLA%20INTERNET_EXPLORER%20CHROME; path=/
Content-Type: text/html; charset=UTF-8

[root@ve1023:Active] config  cat /var/log/ltm
Jan 10 16:36:21 local/tmm info tmm[26866]: Rule myrule HTTP_REQUEST: [active_members -list foo2]: {200.200.200.102 80} {200.200.200.103 80}

The -list option should definitely get you a list of the pool members. If this isn't working could you let us know? That is a bug if it's failing, and I'd like to recreate it if possible. What version are you running?

 

 

Colin