【Mysql && Docker】备份 docker mysql 脚本

my.cnf 
[mysqldump]
user=xxxx
password=xxxx

#!/bin/bash

# 以下配置信息请自己修改
mysql_container="" # MySQL容器名称
mysql_user="" #MySQL备份用户
mysql_password="" #MySQL备份用户的密码
mysql_host=localhost
mysql_port=3306
mysql_charset="utf8mb4" #MySQL编码
backup_db_arr=("db1" "db2") #要备份的数据库名称，多个用空格分开隔开 如("db1" "db2" "db3")
backup_location=/home/mysql/backup  #备份数据存放位置，末尾请不要带"/",此项可以保持默认，程序会自动创建文件夹
expire_backup_delete="ON" #是否开启过期备份删除 ON为开启 OFF为关闭
expire_days=30 #过期时间天数 默认为三天，此项只有在expire_backup_delete开启时有效

# 本行开始以下不需要修改
backup_time=`date +%Y%m%d%H%M`  #定义备份详细时间
backup_Ymd=`date +%Y-%m-%d` #定义备份目录中的年月日时间
backup_3ago=`date -d '15 days ago' +%Y-%m-%d` #3天之前的日期
backup_dir=$backup_location/$backup_Ymd  #备份文件夹全路径
welcome_msg="Welcome to use MySQL backup tools!" #欢迎语

# 判断MYSQL是否启动,mysql没有启动则备份退出
mysql_ps=`ps -ef |grep mysql |wc -l`
mysql_listen=`netstat -an |grep LISTEN |grep $mysql_port|wc -l`
if [ [$mysql_ps == 0] -o [$mysql_listen == 0] ]; then
        echo "ERROR:MySQL is not running! backup stop!"
        exit
else
        echo $welcome_msg
fi

# 连接到mysql数据库，无法连接则备份退出
# mysql -h$mysql_host -P$mysql_port <<end
#systemctl restart mysqld <<end
#docker exec -it $mysql_container mysql -h$mysql_host -P$mysql_port -u$mysql_user -p$mysql_password <<end
#use mysql;
#select host,user from user where user='root' and host='localhost';
#exit
#end

#flag=`echo $?`
flag=0
if [ $flag != "0" ]; then
        echo "ERROR:Can't connect mysql server! backup stop!"
        exit
else
        echo "MySQL connect ok! Please wait......"
        # 判断有没有定义备份的数据库，如果定义则开始备份，否则退出备份
        if [ "$backup_db_arr" != "" ];then
                #dbnames=$(cut -d ',' -f1-5 $backup_database)
                #echo "arr is (${backup_db_arr[@]})"
                for dbname in ${backup_db_arr[@]}
                do
                        echo "database $dbname backup start..."
                        `mkdir -p $backup_dir`
                        #`mysqldump -h$mysql_host -P$mysql_port -u$mysql_user -p$mysql_password $dbname --default-character-set=$mysql_charset | gzip > $backup_dir/$dbname-$backup_time.sql.gz`
                        # 此处不要用 -t, 会导致备份文件为空
                        `docker exec -i $mysql_container mysqldump $dbname --default-character-set=$mysql_charset | gzip > $backup_dir/$dbname-$backup_time.sql.gz`

                        flag=`echo $?`
                        if [ $flag == "0" ];then
                                echo "database $dbname success backup to $backup_dir/$dbname-$backup_time.sql.gz"
                        else
                                echo "database $dbname backup fail!"
                        fi
                        
                done
          # ipv6地址  \[2001::1\]
		`scp -r $backup_dir backup@ipaddr:/home/backup/mysqlbackup`
		flag=`echo $?`
		if [ $flag == "0" ];then
			echo "$backup_dir transport complete!"
		else
			echo "$backup_dir transport failed!"
		fi
        else
                echo "ERROR:No database to backup! backup stop"
                exit
        fi
        # 如果开启了删除过期备份，则进行删除操作
        if [ "$expire_backup_delete" == "ON" -a  "$backup_location" != "" ];then
                 #`find $backup_location/ -type d -o -type f -ctime +$expire_days -exec rm -rf {} \;`
                 `find $backup_location/ -type d -mtime +$expire_days | xargs rm -rf`
                 echo "Expired backup data delete complete!"
        fi
        echo "All database backup success! Thank you!"
	echo "------------ $backup_Ymd ----------------"
	echo "-----------------END---------------------"
        exit
fi

解压 xxx.sql.gz

gzip -d xxx.sql.gz