shell编程实战20

1. 部署mysql主从

#!/bin/bash master_ip=192.168.100.12 slave_ip=192.168.100.13 mysqlc="mysql -uroot -paminglinux" check_ok() { if [ $? -ne 0 ] then echo "$1 出错了。" exit 1 fi } f_exist() { d=`date +%F%T` if [ -f $1 ] then mv $1 $1_$d fi } ## 设置主mysql配置 if ! grep '^server-id' /etc/my.cnf then sed -i '/^\[mysqld\]$/a\server-id = 1001' /etc/my.cnf fi if ! grep '^log-bin.*=.*' /etc/my.cnf then sed -i '/^\[mysqld\]$/a\log-bin = aminglinux' /etc/my.cnf fi sed -i '/^log-bin.*/a\binlog-ignore-db = mysql ' /etc/my.cnf /etc/init.d/mysqld restart check_ok "主上重启mysql" ## 登陆mysql，受权用户、锁表以及show master status。 $mysqlc <<EOF grant replication slave on *.* to 'repl'@$slave_ip identified by 'yourpassword'; flush tables with read lock; EOF $mysqlc -e "show master status" > /tmp/master.log file=`tail -1 /tmp/master.log|awk '{print $1}'` pos=`tail -1 /tmp/master.log|awk '{print $2}'` ## 建立在从上配置和操做的脚本 f_exist /tmp/slave.sh cat > /tmp/slave.sh << EOF #!/bin/bash if ! grep '^server-id' /etc/my.cnf then sed -i '/^\[mysqld\]$/a\server-id = 1002' /etc/my.cnf fi /etc/init.d/mysqld restart check_ok "从上重启mysql" $mysqlc <<EOF stop slave; change master to master_host="$master_ip", master_user="repl", master_password="yourpassword", master_log_file="$file", master_log_pos=$pos; start slave; EOF EOF ## 建立传输slave.sh的expect脚本 f_exist /tmp/rs_slave.expect cat > /tmp/rs_slave.expect <<EOF #!/usr/bin/expect set passwd "aminglinux" spawn rsync -a /tmp/slave.sh root@$slave_ip:/tmp/slave.sh expect { "yes/no" { send "yes\r"} "password:" { send "\$passwd\r" } } expect eof EOF ## 执行expect脚本 chmod +x /tmp/rs_slave.expect /tmp/rs_slave.expect check_ok "传输slave.sh" ## 建立远程执行命令的expect脚本 f_exist /tmp/exe.expect cat > /tmp/exe.expect <<EOF #!/usr/bin/expect set passwd "aminglinux" spawn ssh root@$slave_ip expect { "yes/no" { send "yes\r"} "password:" { send "\$passwd\r" } } expect "]*" send "/bin/bash /tmp/slave.sh\r" expect "]*" send "exit\r" EOF ## 执行expect脚本 chmod +x /tmp/exe.expect /tmp/exe.expect check_ok "远程执行slave.sh" ## 主上解锁表 $mysqlc -e "unlock tables"

2. 管理docker

#!/bin/bash while true do read -p "请输入你要执行的操做：(stop/start/rm) " opt if [ -z "$opt" ] then echo "请输入要执行的操做。" continue else break fi done ## 容器的id存放到一个临时文件里，方便后续遍历 docker ps -a |awk '{print $1}' > /tmp/id.txt case $opt in stop) for id in `cat /tmp/id.txt` do docker stop $id done ;; start) for id in `cat /tmp/id.txt` do docker start $id done rm) for id in `cat /tmp/id.txt` do read -p "将要删除容器$id，是否继续？(y|n)" c case $c in y|Y) docker rm -f $id ;; n|N) echo "容器$id不会被删除。" ;; *) echo "你只能输入'y'或者'n'。" ;; esac done *) echo "你只能输入start/stop/rm。" ;; esac

3. 安装配置samba

#!/bin/bash if [ $# -ne 1 ] then echo "运行脚本的格式为：$0 /dir/" exit 1 else if ! echo $1 |grep -q '^/.*' then echo "请提供一个绝对路径。" exit 1 fi fi if ! rpm -q samba >/dev/null then echo "将要安装samba" sleep 1 yum install -y samba if [ $? -ne 0 ] then echo "samba安装失败" exit 1 fi fi cnfdir="/etc/samba/smb.conf" cat >> $cnfdir <<EOF [share] comment = share all path = $1 browseable = yes public = yes writable = no EOF if [ ! -d $1 ] then mkdir -p $1 fi chmod 777 $1 echo "test" > $1/test.txt #假设系统为CentOS7 systemctl start smb if [ $? -ne 0 ] then echo "samba服务启动失败，请检查配置文件是否正确。" else echo "samba配置完毕，请验证。" fi

4. 批量查看多台机器负载

　

5. 自动挂云盘