多实例MySQL启动脚本

Posted 2020-09-22

开发mysql多实例启动脚本：

已知mysql多实例启动命令为：mysqld_safe–defaults-file=/data/3306/my.cnf &

停止命令为：mysqladmin -u root -p123456 -S /data/3306/mysql.sock shutdown

要求：用函数，case语句、if语句等实现。

 1 #!/bin/sh
 2 [ -f /etc/init.d/functions ]&&. /etc/init.d/functions||exit
 3 #Define Variables
 4 Port=$1
 5 Mysql_user=root
 6 Mysql_sock=/data/${Port}/mysql.sock
 7 Path=/application/mysql/bin
 8 RETVAL=0
 9 #Define Start Function
10 start() {
11   if [ ! -e "$Mysql_sock" ];then
12     /bin/sh $Path/mysqld_safe --defaults-file=/data/${Port}/my.cnf 2>&1 >/dev/null &
13     RETVAL=$?
14     if [ $RETVAL -eq 0 ];then
15         action "Starting $Port MySQL..." /bin/true
16       else
17         action "Starting $Port MySQL..." /bin/false
18     fi
19     else
20       echo "$Port MySQL is Running..."
21   fi
22   return $RETVAL
23 }
24 
25 #Define Stop Function
26 stop() {
27   if [ ! -e "$Mysql_sock" ];then
28       echo "$Port MySQL is Stopped..."
29     else
30       read -p "Please Input $Port MySQL Password:" PWD
31       Mysql_pwd=$PWD
32       $Path/mysqladmin -u ${Mysql_user} -p${Mysql_pwd} -S /data/${Port}/mysql.sock shutdown
33       RETVAL=$?
34       if [ $RETVAL -eq 0 ];then
35         action "Stopping $Port MySQL..." /bin/true
36       else
37         action "Stopping $Port MySQL..." /bin/false
38       fi
39   fi
40   return $RETVAL
41 }
42 
43 case "$2" in
44   start)
45         start
46         RETVAL=$?
47         ;;
48   stop)
49         stop
50         RETVAL=$?
51         ;;
52   restart)
53         stop
54         sleep 3
55         start
56         RETVAL=$?
57         ;;
58   *)
59         echo -e "USAGE:$0 {3306|3307|3308} {start|stop|restart}"
60         RETVAL=2
61         ;;
62 esac
63 exit $RETVAL