[Nagiosplug-devel] check_log plugin
John.Riddoch at scottishwater.co.uk
John.Riddoch at scottishwater.co.uk
Mon Nov 17 07:38:11 CET 2003
I've been testing Nagios and I've found a few issues with the "check_log"
plugin:
1. On log switches, it flags an error if there were any messages in the
previous log; it doesn't differentiate between errors which have appeared
and errors which have gone. This can be fixed by changing the line:
count=`$GREP -c "$query" $tempdiff`
to
count=`$GREP -c "^>.*$query" $tempdiff`
2. The 'tail' command relies on GNU tail; Solaris (and other Unix) tail
versions don't have long command options. Fix is to change:
lastentry=`$GREP "$query" $tempdiff | $TAIL --lines=1`
to
lastentry=`$GREP "^>.*$query" $tempdiff | $TAIL -1`
Note that we also incorporate the grep change here.
3. PATH is set to "", but the chmod isn't given a full path; change:
chmod 600 $tempdiff
to
/bin/chmod 600 $tempdiff
A diff of all these changes is:
# diff check_log.bak check_log
192c192
< chmod 600 $tempdiff
---
> /bin/chmod 600 $tempdiff
198c198
< count=`$GREP -c "$query" $tempdiff`
---
> count=`$GREP -c "^>.*$query" $tempdiff`
201c201
< lastentry=`$GREP "$query" $tempdiff | $TAIL --lines=1`
---
> lastentry=`$GREP "^>.*$query" $tempdiff | $TAIL -1`
Hope these changes prove useful.
John Riddoch
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