如何重写启动脚本-创新互联
这篇文章给大家分享的是重写启动脚本的方法，相信大部分人都还没学会这个技能，为了让大家学会，给大家总结了以下内容，话不多说，一起往下看吧。
!/bin/bash
user=root
port=3306
CmdPath=/opt/mysql/bin
password=xxxxxxxxxxbase_dir=/opt/mysql
inst_dir=/data/3306
alive="00"
sMysqld=0
sMysqldSafe=0
fSock=0
fPID=0check_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}'` ];thenecho "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
}
以上就是重写启动脚本的方法，代码示例简单明了，如果在日常工作遇到此问题。通过这篇文章，希望你能有所收获，更多详情敬请关注创新互联行业资讯频道！
另外有需要云服务器可以了解下创新互联scvps.cn，海内外云服务器15元起步，三天无理由+7*72小时售后在线，公司持有idc许可证，提供“云服务器、裸金属服务器、高防服务器、香港服务器、美国服务器、虚拟主机、免备案服务器”等云主机租用服务以及企业上云的综合解决方案，具有“安全稳定、简单易用、服务可用性高、性价比高”等特点与优势，专为企业上云打造定制，能够满足用户丰富、多元化的应用场景需求。
文章名称：如何重写启动脚本-创新互联
网址分享：http://scjbc.cn/article/descds.html
