Nagios plugin to check files are created within x minutes

问题

I'm trying to convert a bash script to nagios plugin

The script will run a find command to see if files are created within x minutes:

#!/bin/bash
#
#Check NVR 


newfiles=$(find /srv/unifi-video/videos/* -name '*.ts' -mmin -10 | wc -l)

if [[ $newfiles -eq 0 ]] ; then
    echo "!!!WARNING!!! The NVR has System stopped recording."
fi

I tried to convert that script to a Nagios plugin here:

#!/bin/bash
#
#Check NVR
#http://www.netchester.com
#Check if NVR System is recording correctly
newfiles=$(find /srv/unifi-video/videos/* -name '*.ts' -mmin -10 | wc -l)
case $mewfiles in
if [[$newfiles -ne 0]]
then
echo "!!!OK!!! NVR is recording."
exit 0
fi
if [[$newfiles -eq 0]]
then
echo "!!!WARNING!!! NVR is not recording."
exit 1
fi

But I keep getting an error message each time I run it:

./check_nvr.sh: line 9: syntax error near unexpected token `[[$newfiles'
./check_nvr.sh: line 9: `if [[$newfiles -ne 0]]'

I'm not sure how I can resolve this. I'd appreciate any guidance!

EDIT:

I changed the script to:

#!/bin/bash
#
#Check NVR
#http://www.netchester.com
#Youssef Karami
#Check if NVR System is recording correctly
newfiles=$(find /srv/unifi-video/videos/ -name '*.ts' -mmin -10 | wc -l)
case $newfiles in
[1]*)
echo "OK - $newfiles$ found."
exit 0
;;
[0]*)
echo "WARNING - $newfiles% found."
exit 1
;;
esac

But now I don't get an output after I ran the script

回答1:

@Donald_W

I got it to work by changing the script to:

#!/bin/bash
#
#Check NVR
#http://www.netchester.com/scripts_sh/check_nvr
#Youssef Karami
#Check if NVR System is recording correctly
newfiles=$(find /srv/unifi-video/videos/ -name '*.ts' -mmin -10 | wc -l)
case $newfiles in
[1-9]*)
echo "!!!OK!!! - NVR is working properly - $newfiles found."
exit 0
;;
[0]*)
echo "!!!WARNING!!! - NVR is not recording - $newfiles found."
exit 1
;;
esac

But I noticed that in Nagios Dashboard doesn't show that the host is not recording. I stopped the recording just to test and I'm getting the warning message when I ran the script but it doesn't show as a problem in Nagios.

回答2:

There are a few issues.

With /bin/bash, you can simply use [ rather than [[.
You should leave spaces before and after the expression.
The case $newfiles in is unnecessary.

So, this should work:

#!/bin/bash
#
#Check NVR
#http://www.netchester.com
#Check if NVR System is recording correctly

newfiles=$(find . -name '*.ts' -mmin -10 | wc -l)

if [ $newfiles != 0 ]
then
echo "!!!OK!!! NVR is recording."
exit 0
fi
if [ $newfiles == 0 ]
then
echo "!!!WARNING!!! NVR is not recording."
exit 1
fi

Here's the output on my system.

vagrantt:puppet donald$ ./check.sh
!!!WARNING!!! NVR is not recording.
vagrant:puppet hdonald$ touch blah.ts
vagrant:puppet donald$ ./check.sh
!!!OK!!! NVR is recording.

来源：https://stackoverflow.com/questions/32657539/nagios-plugin-to-check-files-are-created-within-x-minutes

标签

Linux

bash

find

nagios