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Reporting correct partition free space of linux OS
Posted: Tue Nov 20, 2012 12:46 pm
by AWS
CentOS release 5.8 (Final)
32bit
2012R1.2
Manual Install of XI
Are you using a proxy: transparent
Are you using SSL: No
*********************************************
I'm trying to monitor a pfSense 2.0.1 server (FreeBSD 8.1-RELEASE-p6 amd64). If I configure my check as:
Code: Select all
Check Command: check_local_disk
$ARG1$: 20%
$ARG2$: 10%
$ARG3$: /
No errors are returned and this is displayed:
DISK OK - free space: / 213145 MB (98% inode=99%):
Which feels about right. However, if I want to also monitor my /var, /usr and swap partitions, I get the same exact output even if I change $ARG3$ to "/var", "/usr", "swap" respectively (not really sure what is the right mount point or variable for checking the swap, but I'll deal with that later).
If I change to NRPE my check command becomes (as a simple test):
Code: Select all
Check Command: check_nrpe
$ARG1$: CheckDriveSize
$ARG2$: -a ShowAll MinWarnFree=10% MinCritFree=5% CheckAll=volumes
and output is:
CHECK_NRPE: Received 0 bytes from daemon. Check the remote server logs for error messages.
Do I have to define a nrpe command on the pfSense side and call it "CheckDriveSize" or am I missing something pretty basic here? The "remote server logs" say:
Nov 20 09:34:12 nrpe[38877]: Client request was invalid, bailing out...
Nov 20 09:34:12 nrpe[38877]: Error: Request contained command arguments, but argument option is not enabled!
Any starting ideas?
thanks.
Re: Reporting correct partition free space of linux OS
Posted: Tue Nov 20, 2012 2:31 pm
by slansing
Can you post the check command string you are using to test with from your Nagios Terminal?
Re: Reporting correct partition free space of linux OS
Posted: Tue Nov 20, 2012 2:54 pm
by AWS
test with NRPE:
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/usr/local/nagios/libexec/check_nrpe -H 10.1.1.254 -t 30 -c CheckDriveSize -a ShowAll MinWarnFree=10% MinCritFree=5% CheckAll=volumes
result:
CHECK_NRPE: Received 0 bytes from daemon. Check the remote server logs for error messages.
test for check_disk:
for /
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/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /
result:
DISK OK - free space: / 213144 MB (98% inode=99%);| /=3956MB;183132;206024;0;228916
for /usr
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/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /usr
result:
DISK OK - free space: / 213143 MB (98% inode=99%);| /=3956MB;183132;206024;0;228916
for /var
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/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /var
result:
DISK OK - free space: / 213143 MB (98% inode=99%);| /=3956MB;183132;206024;0;228916
thank you.
Re: Reporting correct partition free space of linux OS
Posted: Tue Nov 20, 2012 3:02 pm
by scottwilkerson
Can you run the following
This plugin can only check different mount point not paths on a filesystem
For this command
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/usr/local/nagios/libexec/check_nrpe -H 10.1.1.254 -t 30 -c CheckDriveSize -a ShowAll MinWarnFree=10% MinCritFree=5% CheckAll=volumes
Try wrapping the -a arguments in quotes
Code: Select all
/usr/local/nagios/libexec/check_nrpe -H 10.1.1.254 -t 30 -c CheckDriveSize -a 'ShowAll MinWarnFree=10% MinCritFree=5% CheckAll=volumes'
Re: Reporting correct partition free space of linux OS
Posted: Tue Nov 20, 2012 3:38 pm
by AWS
From the pfSense box I'm trying to monitor:
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[2.0.1-RELEASE][root@pfsense.**edit**.local]/root(1): df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/ad6s1a 24G 83M 22G 0% /
devfs 1.0K 1.0K 0B 100% /dev
/dev/ad6s1d 116G 470M 106G 0% /usr
/dev/ad6s1e 77G 111M 71G 0% /var
[2.0.1-RELEASE][root@pfsense.**edit**.local]/root(2):
Wrapping the -a parameters in single or double quotes results in
CHECK_NRPE: Received 0 bytes from daemon. Check the remote server logs for error messages.
I really like that
dh-f command. Can that be used somehow within NagiosXI? That shows what I want to see.
Thanks.
Re: Reporting correct partition free space of linux OS
Posted: Tue Nov 20, 2012 3:57 pm
by lmiltchev
/usr/local/nagios/libexec/check_nrpe -H 10.1.1.254 -t 30 -c CheckDriveSize -a ShowAll MinWarnFree=10% MinCritFree=5% CheckAll=volumes
This looks like NSClient++ (windows agent) stuff... Let me clarify, you are trying to monitor a linux box, correct? What document did you follow to set this up?
Re: Reporting correct partition free space of linux OS
Posted: Tue Nov 20, 2012 4:00 pm
by slansing
In addition if you did not compile the NRPE installation yourself you must use SSL, the error regarding "0 bytes received" is typically an SSL error. If you were to recompile NRPE for no SSL you can switch that option off in the configuration file.
Re: Reporting correct partition free space of linux OS
Posted: Tue Nov 20, 2012 4:18 pm
by AWS
lmiltchev wrote:/usr/local/nagios/libexec/check_nrpe -H 10.1.1.254 -t 30 -c CheckDriveSize -a ShowAll MinWarnFree=10% MinCritFree=5% CheckAll=volumes
This looks like NSClient++ (windows agent) stuff... Let me clarify, you are trying to monitor a linux box, correct? What document did you follow to set this up?
.... I followed the example of ... other... Windows servers... Yeah. Ok.
Can we just erase the previous posts and start fresh? Thank you for that enlightening bit of knowledge. Sorry to waste your time on that!
slansing wrote:In addition if you did not compile the NRPE installation yourself you must use SSL, the error regarding "0 bytes received" is typically an SSL error. If you were to recompile NRPE for no SSL you can switch that option off in the configuration file.
No, I didn't compile anything. I'll look into the SSL stuff for "0 bytes received". So, using the command that does work,
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/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /
is there a reason why I get the exact same output for every linux box I have configured? localhost (Nagios) has the same result as the pfSense server and the -p switch with either "/", "/var" or "/usr" all output the same:
DISK OK - free space: / 213138 MB (98% inode=99%);| /=3961MB;183132;206024;0;228916
Re: Reporting correct partition free space of linux OS
Posted: Tue Nov 20, 2012 4:29 pm
by BanditBBS
Check disk I believe is checking the local disk(Nagios server), not the remote server. You need to use NRPE to check remote server.
Re: Reporting correct partition free space of linux OS
Posted: Tue Nov 20, 2012 5:16 pm
by scottwilkerson
BanditBBS is correct.
Have you installed an agent on the machine you are trying to monitor?