check free disk space

[happy]

Hi

I am using Nagios command (check_nt!USEDDISKSPACE!-l f -w 90 -c 95) to send alert if used space is over 90% / 95%).

I am now looking into setting up alerts if free disk space is lower than say 5GB. I believe Nagios core is not able to do it but a script or plug-in could be used to do that.

I wonder if anyone has a script/ plug-in that they can share which can send alerts based on free disk space integer.

Thanks.

[scottwilkerson]

You cannot do this with check_nt but you can with check_nrpe (using NSClient). You would use something like this

Code: Select all

check_nrpe -H IP -p 5666 -c CheckDriveSize -a ShowAll MinWarnFree=10% MinCritFree=5G Drive=c:

http://www.nsclient.org/nscp/wiki/Check ... ze/samples

[happy]

Hi scottwilkerson

Thank you for taking time to reply - apologies that it took me a while to work on this.

When I run the command you provided from the terminal I get the following:

# ./check_nrpe -H <xxx.xxx.xxx.xxx> -p 5666 -c CheckDriveSize -a ShowAll MinWarnFree=10% MinCritFree=5% Drive=c:
Exception processing request: Request contained arguments (not currently allowed, check the allow arguments option).

# ./check_nrpe -H <xxx.xxx.xxx.xxx> -p 5666
I (0,4,1,66 2012-11-18) seem to be doing fine...
verifies that check_nrpe is available is is able to reach the host.

Do you know which option may not be allowed and how to fix it?

THANKS!

[slansing]

Exception processing request: Request contained arguments (not currently allowed, check the allow arguments option).

Have you checked the allow arguments option? It is located within the configuration file "NSC/nsclient.ini" and should be titled along the lines of:

Code: Select all

allow_arguments

[happy]

Hi

Thank you for replying and pointing me to the correct direction. I was able to made necessary changes to the config file and now I am able to run the following command from terminal and get the expected output.

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./check_nrpe -H <my host ip address> -p 5666 -c CheckDriveSize -a ShowAll MinWarnFree=10% MinCritFree=5G Drive=f:

I am fairly new to Nagios and when I try to integrate it into Nagios I run into issues. Do you know what is the missing part of the puzzle?

In my command.ini file I have added

Code: Select all

define command {
  command_name CheckDriveSize
  command_line check_nrpe -H $HOSTADDRESS$ -p 5666 -c CheckDriveSize -a ShowAll MinWarnFree=$ARG2$ MinCritFree=5G Drive=c:
}

in my windows.cfg file I have added

Code: Select all

define service{
        use                     generic-service
        host_name               <my host name>
        service_description     C:\ Drive Space
        check_command           CheckDriveSize c:,5G!10%
        }

To above Nagios is not happy. Do you know what is needed?

[slansing]

I think I have spotted the problem, in your command definition change the command_line to the following:

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$USER1$/check_nrpe -H $HOSTADDRESS$ -t 30 -c $ARG1$ -a ShowAll MinWarnFree=$ARG2$ MinCritFree=5G Drive=c:

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check_command           check_nrpe!CheckDriveSize!15!

[happy]

Hi Slansing

The changes you recommended has not fixed the issue. After making the changes when I run pre flight test I get the error:
Error: Service check command 'check_nrpe' specified in service 'C:\ Drive Space' for host '<myhostname>' not defined anywhere!

If I commend out the service_description line in the windows.cfg then I don't get any error but I don't receive any alerts either.

Do you know if I need to define service_description at another place first?

Thanks!!!

[gshergill]

Hi happy,

In your command.ini (command.ini is on the nagios server?) you have the following, correct?

Code: Select all

define command {
  command_name CheckDriveSize
  command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -t 30 -c $ARG1$ -a ShowAll MinWarnFree=$ARG2$ MinCritFree=5G Drive=c:
}

So in your windows.cfg you should have the following:

Code: Select all

define service{
        use                     generic-service
        host_name               <my host name>
        service_description     C:\ Drive Space
        check_command           CheckDriveSize!CheckDriveSize!10%
        }

In command.ini you define a "command_name", which is used for the "check_command" in the windows.cfg. The format of "check_command" is normally "command_name!<ARG1>!<ARG2>.....".

I hope this is helpful, I'm assuming your command.ini is on your nagios machine.

Kind Regards,

Gary Shergill

[slansing]

Doh! How did I not see that... I must have ran out of coffee. Thank's for the input as always Gshergill!

[happy]

Hi gshergill and Slansing

Thank you for all your help. I was able to get the required results and configured it as required. I currently have:

Code: Select all

define command {
  command_name CheckDriveSize
  command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -t 30 -c $ARG1$ -a ShowAll MinWarnFree=$ARG2$ MinCritFree=5G Drive=c:
}

define service{
        use                              generic-service
        host_name                  <myhostname>
        service_description     C:\ Drive Space
        check_command          CheckDriveSize!CheckDriveSize!5G
}

How can I change the command_line 'Drive=c' into argument so that I am able to check multiple drive letters with the same command_line?

I tried the following but it did not work and I am not able to figure it out

Code: Select all

command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -t 30 -c $ARG1$ -a ShowAll MinWarnFree=$ARG2$ Drive=$ARG3$ MinCritFree=5G

check_command          CheckDriveSize!CheckDriveSize!c:!CheckDriveSize!5G

I appreciate your time!