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InfoSec_38553's avatar
InfoSec_38553
Icon for Nimbostratus rankNimbostratus
Apr 24, 2012

DNS monitor doesn't work

Hi all,

 

 

I'm trying to create DNS monitor for my DNS servers.

 

 

I used this script:

 

https://devcentral.f5.com/wiki/AdvDesignConfig.DNSMonitorUsingNSLookup.ashx

 

 

I didn't assign any parameter. When I tried to add new pool with this monitor and a member for all services (all ports) I got this message:

 

 

The monitor DNS_External_Monitor has a wildcard destination service and cannot be associated with a node that has a zero service.

 

 

 

How to solved this issue?

 

config
design

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  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Jan 03, 2013
    It still always marks the nodes down even though the script returns 'UP' (not sure if that is an automatic OK response, but I assume it is) have you run tcpdump to see what is going on? 

    [root@ve10:Active] config  b pool dns_pool list
pool dns_pool {
   monitor all dns_test_monitor
   members 8.8.8.8:53 {}
}
[root@ve10:Active] config  b monitor dns_test_monitor list
monitor dns_test_monitor {
   defaults from external
   args "www.google.com 74.125.235.20"
   run "dns_test"
}
[root@ve10:Active] config  ls -l /config/monitors/dns_test
-rwx------ 1 root root 1533 Jan  3 19:25 /config/monitors/dns_test
[root@ve10:Active] config 
[root@ve10:Active] config  b pool dns_pool|grep -i pool\ member
+-> POOL MEMBER dns_pool/8.8.8.8:53   active,up