Swatch : Simple Log Watcher to monitor Asterisk PRI status

This will monitor the asterisk log file and check for some pattern and restart the asterisk & dahdi service. ( can be used as a work around till you find the real problem).

• Install swatch

# yum install swatch

• Create file daemon script

/etc/init.d/swatch

#!/bin/sh
# Simple Log Watcher Program

case "$1" in
'start')
 /usr/bin/swatch --daemon --config-file=/etc/swatch.conf --tail-file=/var/log/asterisk/full --pid-file=/var/run/swatch.pid
 ;;
'stop')
 PID=`cat /var/run/swatch.pid`
 kill $PID
 ;;
*)
 echo "Usage: $0 { start | stop }"
 ;;
esac
exit 0

• Make it executable and enable autostart.

# sudo chmod 755 /etc/init.d/swatch
# sudo ln -s /etc/init.d/swatch /etc/rc2.d/S99swatch
# sudo ln -s /etc/init.d/swatch /etc/rc3.d/S99swatch
# sudo ln -s /etc/init.d/swatch /etc/rc5.d/S99swatch

• Create swatch config and commands.

vi /etc/swatch.conf

watchfor /Span 1: D-channel is down!|Primary D-Channel on span 1 down/
# echo
 write root
 mail addresses=user1\@mydomain.net:user2\@mydomain.net, subject=PRI down. Trying to restart.
 exec="/usr/bin/rstast.sh"

 

• Add commands in  script and make it executable.

vi /usr/bin/rstast.sh

#!/bin/sh
sudo asterisk -rx "logger rotate"
sleep 3
sudo /etc/init.d/asterisk stop
sleep 3
sudo /etc/init.d/dahdi restart
sleep 3
sudo /etc/init.d/asterisk start
sleep 2

# chmod 755 /usr/bin/rstast.sh