NTP Health CHECK

have you seen these ones?

 

 

NTP Monitor by philh

 

http://devcentral.f5.com/wiki/AdvDesignConfig.NTP_Monitor.ashx

 

 

About NTP healthcheck

 

http://devcentral.f5.com/Community/GroupDetails/tabid/1082223/asg/56/aft/1172057/showtab/groupforums/Default.aspx

Hi Nitass,

 

 

I checked it. but its kind of puzzle not able to understand.is there any simple way. Actually i am not good in script

 

 

 

Thanks

 

A.N

i am not good either. anyway, this is my testing.

[root@ve1023:Active] config  b monitor ntp_mon list
monitor ntp_mon {
   defaults from external
   run "ntp_mon.pl"
}

[root@ve1023:Active] config  ls -l /config/monitors/
total 19
-rwxr-xr-x 1 root root 3006 Sep 30 00:33 arg_example
lrwxrwxrwx 1 root root   19 Sep 30 01:01 builtins -> /usr/share/monitors
drwxr-xr-x 3 root root 1024 Feb  9 02:43 CPAN
-rwxr-xr-x 1 root root 3145 Feb  9 04:16 ntp_mon.pl
-rwxr-xr-x 1 root root 1454 Sep 30 00:33 sample_monitor
-rwxr-xr-x 1 root root 2252 Nov 14 22:59 testmonitor.sh

in ntp_mon.pl, i added the $node line since it is noted in external monitor wiki.

my $node = $ENV{"NODE_IP"};
$node =~ s/::ffff://;
my $port = $ENV{"NODE_PORT"};

External Monitor wiki
http://devcentral.f5.com/wiki/AdvDesignConfig.ExternalMonitor.ashx

also, i modified condition to mark pool member down if its stratum is 11.

if ($response{'Stratum'} =~ /\d+/) {
    if the stratum is a number
   if ($response{'Stratum'} == 11) {
      return 0;
   } else {
       and it isn't 11
      return 1;
   }
} else {
   return 0;
}

i set up 3 pool members. ntpd is running on 192.168.11.168 and 200.200.200.101 only. anyway, 200.200.200.101 stratum is 10. so, 200.200.200.101 and 200.200.200.102 will be marked down by the monitor.

[root@ve1023:Active] config  b pool ntp_pool list
pool ntp_pool {
   monitor all ntp_mon
   members {
      192.168.11.168:123 {}
      200.200.200.101:123 {}
      200.200.200.102:123 {}
   }
}

[root@ve1023:Active] config  b pool ntp_pool|grep -i pool\ member
+-> POOL MEMBER ntp_pool/192.168.11.168:123   active,up
+-> POOL MEMBER ntp_pool/200.200.200.101:123   inactive,down
+-> POOL MEMBER ntp_pool/200.200.200.102:123   inactive,down

Hi Nitass

 

 

I have confusion with this part

 

 

my $node = $ENV{"NODE_IP"};

 

$node =~ s/::ffff://;

 

my $port = $ENV{"NODE_PORT"};

 

 

I have Three member in pool .My pool member 10.43.44.7 , 10.43.44.8 , 10.43.44.9. I have to define ALL three ip. At the place of NODE_IP.

 

 

HOW should i write for THESE IP OR NO NEED TO CHANGE ANY THIS . Will it take Dynamic from pool member

 

 

ONE More thing

 

 

if Any member down . Does it decrease Stratum VALUE

 

 

Thanks

 

Ankush

 

I have Three member in pool .My pool member 10.43.44.7 , 10.43.44.8 , 10.43.44.9. I have to define ALL three ip. At the place of NODE_IP. no. actually, i just wanted to show i added the second line ($node =~ ...) in the script. the script will take ip and port from pool.

 

 

if Any member down . Does it decrease Stratum VALUE sorry i am not sure what you mean. each ntp server has its own stratum. i do not think one affects other when it is down.

One Last question Nitass

 

 

Please tell mean of 2 lines

 

 

my $node = $ENV --- What is of $ENV

 

 

 

if ($response{'Stratum'} =~ /\d+/) --- what is mean of ~ /\d+/)

my $node = $ENV --- What is of $ENV it is environment variable.

 

 

Example: Using the %ENV Variable

 

http://www.cs.cf.ac.uk/Dave/PERL/node106.html

 

 

if ($response{'Stratum'} =~ /\d+/) --- what is mean of ~ /\d+/)it means digit character.

HI Nitass

 

 

I using this script

 

 

!/usr/bin/perl

 

my $node = $ENV{"NODE_IP"};

 

$node =~ s/::ffff://;

 

my $port = $ENV{"NODE_PORT"};

 

 

if ($response{'Stratum'} =~ /\d+/) {

 

if the stratum is a number

 

if ($response{'Stratum'} == 11) {

 

return 0;

 

} else {

 

and it isn't 11

 

return 1;

 

}

 

} else {

 

return 0;

 

}

 

 

 

 

When i use .\ntp_mon.pl to run this script .its give error line 15 " can not run subroutine"

 

 

 

 

ONE MORE THING.can you look below config

 

 

when i create external monitor using GUI. Monitors ---> External Monitor---->

 

 

1. name defining

 

2. External progamme ----> /config/monitors/ntp_mon.pl

 

 

Except this DO WE DEFINE ANY OTHER Variable column ?????

 

 

 

IN LAST I BIND WITH POOL

 

 

 

 

Please check if any thing i am misssing

 

 

 

THANKS IN ADVANCE

 

 

 

2. External progamme ----> /config/monitors/ntp_mon.pl i think you do not need to put /config/monitors. only ntp_mon.pl could be fine.

 

 

Except this DO WE DEFINE ANY OTHER Variable column ????? only program name could be enough.

Nitass,

 

 

Here startum value 11 is ntp server value ? OR something else.

 

 

I applied this script with 2 stratum value because ntp serever have value 2. it saying node is Available. its working ?

 

 

How can I do more test to check its working