通过Shell脚本批量创建服务器上的MySQL数据库账号
时间：2021-07-15 09:31:44 | 栏目：Shell | 点击：次
1.项目背景
因监控需要，我们需要在既有的每个MySQL实例上创建一个账号。公司有数百台 MySQL 实例，如果手动登入来创建账号很麻烦，也不现实。所以，我们写了一个简单的shell脚本，用来创建批量服务器的mysql 账号。
2.执行脚本内容;
#!/bin/bash
## 此段shell 脚本的主要功能是实现在多个SQL Server IP实例上，创建账号。输入参数是两个，第一个是数据库所在的IPs，即多个Server IP构成的字符串，IP间用逗号隔开。第二个参数是 端口（3306 或 3307）
##MySQL程序所在路径--mysql bin 文件所在路径；如果由建立软连接，可直接是mysql
command_linebin="/data/mysql5720/bin/mysql"
##用来连接MySQ的账号和密码
username="DBA_MYSQLACC"
password="DBAACCTEST109211706DF"
## 新创建的账号和密码
createuid="testuid"
createpwd="testpwd"
##指定新创建的用户在那个主机上可以登录，如果是本地用户可用localhost；如果指定规则的可以使用通配符%
phost="177.177.%"
mysqlserverIPs=$1
echo $mysqlserverIPs
## 按“,”分割，将字符串转换为数组。
IParr=(${mysqlserverIPs//,/ })
echo $IParr
for ((i=0;i<${#IParr[@]};i++))
do
IP=${IParr[$i]}
echo "${IP}"
select_sql="select * from user where user=\"$createuid\""
msg=$(${command_linebin} -h ${IP} -P $2 -u$username -p$password -s mysql -e "${select_sql}")
echo $msg
##创建账号前，先检查需要创建的账号是否已经存在，如果已经存在了，则直接退出。
if [[ $msg = "" ]] ;then
echo $(date -d today +"%Y%m%d%H%M%S") $mip "The Condition is OK,permit to create UID."
else
echo $(date -d today +"%Y%m%d%H%M%S") $IP "The UID you want create has been exited, please check it! The Act Quit!"
exit
fi
## 以下几行代码是创建的关键
${command_linebin} -h ${IP} -P $2 -u$username -p$password -s mysql <<EOF
CREATE USER '$createuid'@'$phost' IDENTIFIED BY '$createpwd';
GRANT Select,PROCESS ON *.* TO '$createuid'@'$phost';
flush privileges;
EOF
##创建后，再次检查账号看否已将存在。如果不存在，则说明创建失败，直接退出。
select_sql="select * from user where user=\"$createuid\""
msg=$(${command_linebin} -h ${IP} -P $2 -u$username -p$password -s mysql -e "${select_sql}")
echo $msg
if [[ $msg = "" ]] ;then
echo $(date -d today +"%Y%m%d%H%M%S") ${IP} "The action to create UID Error,Please Check it! The Act Quit! "
exit
else
echo $(date -d today +"%Y%m%d%H%M%S") ${IP} "Congratulation! Create UID successful"
fi
done
3. 执行举例
Step 1 将代码放置到执行文件中，可执行文件命名为 mysql_CreateUIDMulti.sh
Step 2 请对此文件授予可执行权限，否则，提示以下错误。
Step 3 执行的具体命令（参数格式），例如 在 177.177.XXX.128,177.177.XXX.144 两个 3306的实例上创建账号
./mysql_CreateUIDMulti.sh 177.177.XXX.128,177.177.XXX.144 3306
Step 4 打印的执行结果如下
177.177.XXX.128,177.177.XXX.144 177.177.XXX.128 177.177.XXX.128 mysql: [Warning] Using a password on the command line interface can be insecure. 20180529171802 The Condition is OK,permit to create UID. mysql: [Warning] Using a password on the command line interface can be insecure. mysql: [Warning] Using a password on the command line interface can be insecure. 177.177.% testuid Y N N N N N N N Y N N N N N N N N N N N N N N N N N N N N 0 0 0 0 mysql_native_password *22CBF14EBDE8814586FF12332FA2B6023A7603BB N 2018-05-29 17:18:02 NULL N 20180529171802 177.177.XXX.128 Congratulation! Create UID successful 177.177.XXX.144 mysql: [Warning] Using a password on the command line interface can be insecure. 177.177.% testuid Y N N N N N N N Y N N N N N N N N N N N N N N N N N N N N 0 0 0 0 mysql_native_password *22CBF14EBDE8814586FF12332FA2B6023A7603BB N 2018-05-30 00:56:38 NULL N 20180529171802 177.177.XXX.144 The UID you want create has been exited, please check it! The Act Quit!
4.补充说明
如果创建一个服务器上的MySQL账号，可按照以下格式
./mysql_CreateUIDMulti.sh 177.177.XXX.128 3306
打印的Log 如下
177.177.XXX.128 177.177.XXX.128 177.177.XXX.128 mysql: [Warning] Using a password on the command line interface can be insecure. 20180529173517 The Condition is OK,permit to create UID. mysql: [Warning] Using a password on the command line interface can be insecure. mysql: [Warning] Using a password on the command line interface can be insecure. 177.177.% testuid Y N N N N N N N Y N N N N N N N N N N N N N N N N N N N N 0 0 0 0 mysql_native_password *22CBF14EBDE8814586FF12332FA2B6023A7603BB N 2018-07-29 17:35:17 NULL N 20180529173517 177.177.XXX.128 Congratulation! Create UID successful
总结