Shell script to restart MySQL server if it is killed or not working
Posted in Monitoring
#!/bin/bash # Shell script to restart MySQL server if it is killed or not working # due to ANY causes. # When script detects mysql is not running (it basically sends ping request # to MySQL) it try to start using /etc/init.d/mysql script; and it sends an # email to user indicating the status. # This script must be run from Cron Job so that it can monitor mysql server. # For more info visit following url: # http://www.cyberciti.biz/nixcraft/vivek/blogger/2005/08/linux-mysql-server-monitoring.html # -------------------------------------------------------------------------- # Copyright (C) 2005 nixCraft project <http://cyberciti.biz/fb/> # This script is licensed under GNU GPL version 2.0 or above # ------------------------------------------------------------------------- # This script is part of nixCraft shell script collection (NSSC) # Visit http://bash.cyberciti.biz/ for more information. # ------------------------------------------------------------------------- # mysql root/admin username MUSER="root" # mysql admin/root password MPASS="SET-ROOT-PASSWORD" # mysql server hostname MHOST="localhost" #Shell script to start MySQL server i.e. path to MySQL daemon start/stop script. # Debain uses following script, need to setup this according to your UNIX/Linux/BSD OS. MSTART="/etc/init.d/mysql start" # Email ID to send notification EMAILID="notification@somewhere-corp.com" # path to mail program MAILCMD="$(which mail)" # path mysqladmin MADMIN="$(which mysqladmin)" #### DO NOT CHANGE anything BELOW #### MAILMESSAGE="/tmp/mysql.fail.$$" # see if MySQL server is alive or not # 2&1 could be better but i would like to keep it simple and easy to # understand stuff :) $MADMIN -h $MHOST -u $MUSER -p${MPASS} ping 2>/dev/null 1>/dev/null if [ $? -ne 0 ]; then echo "" >$MAILMESSAGE echo "Error: MySQL Server is not running/responding ping request">>$MAILMESSAGE echo "Hostname: $(hostname)" >>$MAILMESSAGE echo "Date & Time: $(date)" >>$MAILMESSAGE # try to start mysql $MSTART>/dev/null # see if it is started or not o=$(ps cax | grep -c ' mysqld$') if [ $o -eq 1 ]; then sMess="MySQL Server MySQL server successfully restarted" else sMess="MySQL server FAILED to restart" fi # Email status too echo "Current Status: $sMess" >>$MAILMESSAGE echo "" >>$MAILMESSAGE echo "*** This email generated by $(basename $0) shell script ***" >>$MAILMESSAGE echo "*** Please don't reply this email, this is just notification email ***" >>$MAILMESSAGE # send email $MAILCMD -s "MySQL server" $EMAILID < $MAILMESSAGE else # MySQL is running :) and do nothing : fi # remove file rm -f $MAILMESSAGE
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Tags: date time, debain, elif, email, if command, mysql script, mysqladmin command, ping request, root admin, root password, script collection, server hostname, tmp, unix linux ~ Last updated on: April 10, 2008
very good a simple. thx