【Mysql && Docker】備份 docker mysql 腳本

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

#!/bin/bash

# 以下配置信息請自己修改
mysql_container="" # MySQL容器名稱
mysql_user="" #MySQL備份用戶
mysql_password="" #MySQL備份用戶的密碼
mysql_host=localhost
mysql_port=3306
mysql_charset="utf8mb4" #MySQL編碼
backup_db_arr=("db1" "db2") #要備份的數據庫名稱，多個用空格分開隔開 如("db1" "db2" "db3")
backup_location=/home/mysql/backup  #備份數據存放位置，末尾請不要帶"/",此項可以保持默認，程序會自動創建文件夾
expire_backup_delete="ON" #是否開啓過期備份刪除 ON爲開啓 OFF爲關閉
expire_days=30 #過期時間天數 默認爲三天，此項只有在expire_backup_delete開啓時有效

# 本行開始以下不需要修改
backup_time=`date +%Y%m%d%H%M`  #定義備份詳細時間
backup_Ymd=`date +%Y-%m-%d` #定義備份目錄中的年月日時間
backup_3ago=`date -d '15 days ago' +%Y-%m-%d` #3天之前的日期
backup_dir=$backup_location/$backup_Ymd  #備份文件夾全路徑
welcome_msg="Welcome to use MySQL backup tools!" #歡迎語

# 判斷MYSQL是否啓動,mysql沒有啓動則備份退出
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

# 連接到mysql數據庫，無法連接則備份退出
# 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 [ $flag != "0" ]; then
        echo "ERROR:Can't connect mysql server! backup stop!"
        exit
else
        echo "MySQL connect ok! Please wait......"
        # 判斷有沒有定義備份的數據庫，如果定義則開始備份，否則退出備份
        if [ "$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`
                        # 此處不要用 -t, 會導致備份文件爲空
                        `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 "$backup_dir transport failed!"
		fi
        else
                echo "ERROR:No database to backup! backup stop"
                exit
        fi
        # 如果開啓了刪除過期備份，則進行刪除操作
        if [ "$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

解壓 xxx.sql.gz

gzip -d xxx.sql.gz