!/bin/bash
user=root port=3306 CmdPath=/opt/mysql/bin password=xxxxxxxxxx
base_dir=/opt/mysql inst_dir=/data/3306 alive="00" sMysqld=0 sMysqldSafe=0 fSock=0 fPID=0
check_alive()
{
echo "running check_alive..."
if [ ps -ef | grep $port | grep -v grep | grep 'mysqld ' |awk '{print $2}' ];then
echo "Process mysqld is running!"
sMysqld=1
else
echo "Process mysqld is not running!"
sMysqld=0
fi
if [ `ps -ef | grep 3306 | grep -v grep | grep 'mysqld_safe' |awk '{print $2}'` ];then
echo "Process mysqld_safe is running!"
sMysqldSafe=1
else
echo "Process mysqld_safe is not running!"
sMysqldSafe=0
fi
if [ -e ${inst_dir}/mysql.sock ];then
echo "socked file exists!"
fSock=1
else
echo "socked file not exists!"
fSock=0
fi
if [ -e ${inst_dir}/mysql.pid ];then
echo "pid file exists!"
fPID=1
else
echo "pid file not exists!"
fPID=0
fi
if [ $sMysqld -eq 1 ];then
if [ $fPID -eq 0 ];then
echo "PID is missing, tring to recreate..."
ps -ef | grep $port | grep -v grep | grep 'mysqld ' |awk '{print $2}' > ${inst_dir}/mysql.pid
if [ -e ${inst_dir}/mysql.pid ]; then
echo "pid file is created!"
else
echo "can not create PID file, please have a check!"
fi
fi
if [ $sMysqldSafe -eq 0 ];then
echo "Process mysqld_safe is missing, please have a check! May cause mysqld crash!"
fi
if [ $fSock -eq 1 ];then
echo "MySQL running fine!!!"
alive="11"
else
echo "socket file is missing, you may have to login without socket!"
alive="10"
fi
else
echo "process mysqld is missing, mysql is stopped!"
if [ $fSock -eq 1 ] | [ $fPID -eq 1 ];then
echo "mysql was stopped abnormality!"
echo "cleaning socket file and pid file"
alive="01"
else
alive="00"
fi
fi
}
start_mysql() { check_alive printf "MySQL is starting ... \n" if [ $alive == "00" ]; then ${CmdPath}/mysqld_safe --defaults-file=${inst_dir}/my.cnf --user=${user} 2>&1 >/dev/null & else if [ $alive == "11" ]; then echo "MySQL is runnig!" else if [ $alive == "01" ]; then echo "MySQL was stopped but pid or sock file still exits!" echo "Cleanning pid or sock files!" if [ $fSock -eq 1 ];then rm -f ${inst_dir}/mysql.sock fi if [ $fPID -eq 1 ];then rm -f ${inst_dir}/mysql.pid fi echo "Tring to start MySQL again!!!" ${CmdPath}/mysqld_safe --defaults-file=${inst_dir}/my.cnf --user=${user} 2>&1 >/dev/null & fi fi fi }
stop_mysql()
{
check_alive
printf "MySQL is Stopping...\n"
if [ $alive == "11" ]; then
${CmdPath}/mysqladmin -u root -p${password} -S ${inst_dir}/mysql.sock shutdown 2>&1 >/dev/null &
else
if [ $alive == "10" ]; then
${CmdPath}/mysqladmin -u root -p${password} -h $HOSTNAME -P $port --protocol tcp shutdown 2>&1 >/dev/null &
else
echo "MySQL is not running, no need stop!"
fi
fi
}
restart_mysql() { stop_mysql sleep 5 if [ $? == 0 ];then start_mysql else echo "stop mysql failed!" fi }
case $1 in
start)
start_mysql
;;
stop)
stop_mysql
;;
restart)
restart_mysql
;;
status)
status_mysql
;;
alive)
check_alive
;;
*)
printf "Please in put start|stop|restart|status as input"
;;
esac
