NTP Monitoring

[progressive.nagiosXI]

Hi ,

One of our client want to enable NTP monitoring for all servers i.e. if any of the server’s time will not sync with Company Time server then they will get an alert.


Please let us know is this possible via SNMP or any other way ,if possible
what all information is required from their end, this needs to be implemented on priority.

Currently we are monitoring their servers via SNMP .

Servers need to monitor are Windows,Linux,HP-UX

Thanks

[cdienger]

I don't think it's doable via snmp, but you could use an NRPE agent to run the check_ntp_time plugin on the *nix machines and an external script on the Windows machines.

For Windows you'll need to install nsclient++, install a plugin that checks the time, and configure the client to run the script:

https://assets.nagios.com/downloads/nag ... ios-XI.pdf
https://exchange.nagios.org/index.php?o ... chword=ntp
https://support.nagios.com/kb/article.php?id=528

We have NRPE agents for a lot of Linux platforms:

https://support.nagios.com/kb/article/n ... rpe-8.html

HP-UX may be a bit trickier as it needs to be compiled. See:

https://assets.nagios.com/downloads/nag ... e/NRPE.pdf

[progressive.nagiosXI]

Hi ,

we currently monitor HP-UX with NRPE and window and linux with SNMP ,

we tested below plugins in our Nagiosxi server and give NTP server IP address
check_ntp_server_sync.sh(give some error in script)
check_ntp_time.pl (not giving any output)

Please give some working plugins details ,also let us know can we run same plugins via NCPA as it gives auto discovery feature for disks and easy to install on windows and linux.

Thanks

[cdienger]

For the *nix machines I would recommend using the check_ntp_time plugin which are a part of the plugins - https://nagios-plugins.org/downloads/. I can be tested on the XI machine with:

Code: Select all

/usr/local/nagios/libexec/check_ntp_time -H 0.north-america.pool.ntp.org -v

Note that NCPA doesn't install these plugins by default so you would need to install them and then copy them to the NCPA plugins' directory(usually /usr/local/ncpa/plugins). The check would then be executed from the XI machine with something like:

Code: Select all

/usr/local/nagios/libexec/check_ncpa.py -H ncpa_agent_ip -t '<your token>' -M 'plugins/check_ntp_time' -q 'args=-H 0.north-america.pool.ntp.org'

On a Windows system you can use https://exchange.nagios.org/directory/P ... 29/details and then run it with something like:

Code: Select all

/usr/local/nagios/libexec/check_ncpa.py -H ncpa_agent_ip -t '<your token>' -M 'plugins/check_time.vbs' -q 'args=0.north-america.pool.ntp.org .25 .50'

[progressive.nagiosXI]

Hi,

warning and critical Threshold not work for windows.
For testing we increase and decrease server time 1 hour.

Server time : +1hour
NTP OK: Offset -3592.1846580 secs|'offset'=-3592.1846580s;.50;.60;
[root@monitoring-nagiosxi ~]# /usr/local/nagios/libexec/check_ncpa.py -H 10.80.0.189 -t 'Token' -M 'plugins/check_time.vbs' -q 'args=0.north-america.pool.ntp.org .50 .60 -v'
NTP OK: Offset -3592.1813437 secs|'offset'=-3592.1813437s;.50;.60;
[root@monitoring-nagiosxi ~]# /usr/local/nagios/libexec/check_ncpa.py -H 10.80.0.189 -t 'Token' -M 'plugins/check_time.vbs' -q 'args=0.north-america.pool.ntp.org .50 .60 -v'
Server time : -1hour
NTP OK: Offset +3611.9815976 secs|'offset'=+3611.9815976s;.50;.60;
You have mail in /var/spool/mail/root
[root@monitoring-nagiosxi ~]# /usr/local/nagios/libexec/check_ncpa.py -H 10.80.0.189 -t 'Token' -M 'plugins/check_time.vbs' -q 'args=0.north-america.pool.ntp.org .50 60 -v'
NTP OK: Offset +3611.9822431 secs|'offset'=+3611.9822431s;.50;60;
[root@monitoring-nagiosxi ~]# /usr/local/nagios/libexec/check_ncpa.py -H 10.80.0.189 -t 'Token' -M 'plugins/check_time.vbs' -q 'args=0.north-america.pool.ntp.org 50 60 -v'
NTP OK: Offset +3611.9860925 secs|'offset'=+3611.9860925s;50;60;

[cdienger]

Make the changes to the script that are mentioned in the comments:

1) SetLocale("en-us") should be added as mentioned above

2) Abs() should be used then comparing, around 75th line:

If result = "" Then
Err = 3
Status = "UNKNOWN"
ElseIf Abs(result) > Abs(crit) Then
Err = 2
status = "CRITICAL"
ElseIf Abs(result) > Abs(warn) Then
Err = 1
status = "WARNING"
Else
Err = 0
status = "OK"
End If

[progressive.nagiosXI]

Thanks cdienger/Team ,

NTP successfully work on windows,linux and HP-UX

[cdienger]

Glad to hear!