Bash-Scripting - Munin Plugin don't work
- by FTV Admin
i have written a munin-plugin to count the http-statuscodes of lighttpd. The script:
#!/bin/bash
######################################
# Munin-Script: Lighttpd-Statuscodes #
######################################
##Config
# path to lighttpd access.log
LIGHTTPD_ACCESS_LOG_PATH="/var/log/lighttpd/access.log"
# rows to parse in logfile (higher value incrase time to run plugin. if value to low you may get bad counting)
LOG_ROWS="200000"
#
#munin
case $1 in
autoconf) # check config
AVAILABLE=`ls $LIGHTTPD_ACCESS_LOG_PATH`
if [ "$AVAILABLE" = "$LIGHTTPD_ACCESS_LOG_PATH" ]; then
echo "yes"
else
echo "No: "$AVAILABLE
echo "Please check your config!"
fi
exit 0;;
config) # graph config
cat <<'EOM'
graph_title Lighhtpd Statuscodes
graph_vlabel http-statuscodes / min
graph_category lighttpd
1xx.label 1xx
2xx.label 2xx
3xx.label 3xx
4xx.label 4xx
5xx.label 5xx
EOM
exit 0;;
esac
## calculate
AVAILABLE=`ls $LIGHTTPD_ACCESS_LOG_PATH`
if [ "$AVAILABLE" = "$LIGHTTPD_ACCESS_LOG_PATH" ]; then
TIME_NOW=`date`
CODE_1xx="0"
CODE_2xx="0"
CODE_3xx="0"
CODE_4xx="0"
CODE_5xx="0"
for i in 1 2 3 4 5; do
TIME5=`date +%d/%b/%Y:%k:%M --date "$TIME_NOW -"$i"min"`
CODE_1xx=$(( $CODE_1xx + `tail -n $LOG_ROWS $LIGHTTPD_ACCESS_LOG_PATH | grep "$TIME5" | grep 'HTTP/1.1" 1' | grep -c " "` ))
CODE_2xx=$(( $CODE_2xx + `tail -n $LOG_ROWS $LIGHTTPD_ACCESS_LOG_PATH | grep "$TIME5" | grep 'HTTP/1.1" 2' | grep -c " "` ))
CODE_3xx=$(( $CODE_3xx + `tail -n $LOG_ROWS $LIGHTTPD_ACCESS_LOG_PATH | grep "$TIME5" | grep 'HTTP/1.1" 3' | grep -c " "` ))
CODE_4xx=$(( $CODE_4xx + `tail -n $LOG_ROWS $LIGHTTPD_ACCESS_LOG_PATH | grep "$TIME5" | grep 'HTTP/1.1" 4' | grep -c " "` ))
CODE_5xx=$(( $CODE_5xx + `tail -n $LOG_ROWS $LIGHTTPD_ACCESS_LOG_PATH | grep "$TIME5" | grep 'HTTP/1.1" 5' | grep -c " "` ))
done
CODE_1xx=$(( $CODE_1xx / 5 ))
CODE_2xx=$(( $CODE_2xx / 5 ))
CODE_3xx=$(( $CODE_3xx / 5 ))
CODE_4xx=$(( $CODE_4xx / 5 ))
CODE_5xx=$(( $CODE_5xx / 5 ))
echo "1xx.value "$CODE_1xx
echo "2xx.value "$CODE_2xx
echo "3xx.value "$CODE_3xx
echo "4xx.value "$CODE_4xx
echo "5xx.value "$CODE_5xx
else
echo "1xx.value U"
echo "2xx.value U"
echo "3xx.value U"
echo "4xx.value U"
echo "5xx.value U"
fi
If i run the script on local machine it runs perfectly:
root@server1 /etc/munin/plugins # ll
lrwxrwxrwx 1 root root 45 2011-12-19 15:23 lighttpd_statuscodes -> /usr/share/munin/plugins/lighttpd_statuscodes*
root@server1 /etc/munin/plugins # ./lighttpd_statuscodes autoconf
yes
root@server1 /etc/munin/plugins # ./lighttpd_statuscodes config
graph_title Lighhtpd Statuscodes
graph_vlabel http-statuscodes / min
graph_category lighttpd
1xx.label 1xx
2xx.label 2xx
3xx.label 3xx
4xx.label 4xx
5xx.label 5xx
root@server1 /etc/munin/plugins #./lighttpd_statuscodes
1xx.value 0
2xx.value 5834
3xx.value 1892
4xx.value 0
5xx.value 0
But Munin shows no graph: http://s1.directupload.net/images/111219/3psgq3vb.jpg
I have tested the Plugin from munin-server via telnet:
root@munin-server /etc/munin/plugins/ # telnet 123.123.123.123 4949
Trying 123.123.123.123...
Connected to 123.123.123.123.
Escape character is '^]'.
# munin node at server1.cluster1
fetch lighttpd_statuscodes
1xx.value U
2xx.value U
3xx.value U
4xx.value U
5xx.value U
.
Connection closed by foreign host.
You can see in the script that value = U only printed, when the script can't check the lighttpd's access.log. But why can't script do it, when running via munin, and when running on local machine all is ok?
Is there a bug in my bash-script? I have no Idea. Thanks for helping!
