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gabigart_31229's avatar
gabigart_31229
Icon for Nimbostratus rankNimbostratus
Oct 18, 2012

Resolv lookup by virtual server name

Hi!

 

We are trying to resolve some domains using the RESOLV::lookup command on iRules, so we created a virtual server pointing to a pool of DNS servers.

 

The code we use in the iRule is as follows:

 

set ips [RESOLV::lookup @vserver_dns -a $host]

 

 

But when running, we get the following error message:

 

Tue Jul 31 17:23:17 EDT 2012 err tmm tmm[7060] 01220001 TCL error: /Common/suppliers - while executing "RESOLV::lookup @vserver_dns -a $host"

 

 

So we were needing help to see what we are doing wrong.

 

application delivery
dev
devops
iRules

4 Replies

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  • Mohamed_Lrhazi's avatar
    Mohamed_Lrhazi
    Icon for Altocumulus rankAltocumulus
    Oct 18, 2012
    the wiki says this was added in BIGIP 10.1, what version are you running?

     

     

    https://devcentral.f5.com/wiki/irules.resolv__lookup.ashx

     

  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Oct 18, 2012
    Can you try setting the virtual server name with the folder:

     

     

    set ips [RESOLV::lookup @/Common/vserver_dns -a $host]

     

     

    Aaron
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Oct 19, 2012
    Aaron is correct. 🙂 

    [root@ve11a:Active:Changes Pending] config  tmsh
root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) list ltm rule myrule
ltm rule myrule {
    when HTTP_REQUEST {
   log local0. [RESOLV::lookup @/Common/dnsvs -a "www.google.com"]
}
}

[root@ve11a:Active:Changes Pending] config  tail -f /var/log/ltm
Oct 19 20:28:15 tmm info tmm[23647]: Rule /Common/myrule : 173.194.38.146 173.194.38.144 173.194.38.148 173.194.38.145 173.194.38.147
  • gabigart_31229's avatar
    gabigart_31229
    Icon for Nimbostratus rankNimbostratus
    Oct 19, 2012

    Aaron, thank you very much!

     

    It would be great to update documentation at https://devcentral.f5.com/wiki/iRules.resolv__lookup.ashx :P

     

     

    Thanks!