Docker 镜像批量备份（导出）

脚本作用

1.批量导出Docker Images;
2.部分导出，通过指定Docker Images ID 到脚本“LIST”变量

运行实例

#导出全部的镜像；
 sh ExportImg.sh

 #导出部分镜像
 LIST=“ d235b 201c7a  201c7a”
 sh ExportImg.sh
注意：LIST赋值Docker Images ID ,多个镜像ID通过空格隔离；执行脚本是只会导出定义ID的镜像；

镜像还原(任选一种)

docke load --input xxx.tar
docker load < xx.tar
docker load -i xx.tar

脚本内容

LIST=""
TXT=/root/tmp.txt
BAKDIR=/usr/local/bak
LOGDIR=/usr/local/bak/log
LOGFILE=$LOGDIR/bak.`date +%Y%m%d`.log

[ ! -d $BAKDIR ] && mkdir -p $BAKDIR
[ ! -d $LOGDIR ] && mkdir -p $LOGDIR

if [ -n "$LIST" ]
then
        for list in $LIST
        do
                RES_TAG=`docker images |grep $list|awk ‘{a=$1":"$2;print a }‘`
                NUM=`docker images |grep $list |awk ‘{a=$1":"$2;print a }‘|awk -F"/" ‘{print NF-1}‘`
                if [ $NUM -eq 1 ]
                then
                        BAK_NAME=`docker images |grep $list|awk ‘{a=$1":"$2;print a }‘|awk -F"/" ‘{print $2}‘`
                        /usr/bin/docker save $RES_TAG -o $BAKDIR/$BAK_NAME.tar >> $LOGFILE 2>&1
                else
                        SNUM=$[$NUM + 1 ]
                        BAK_NAME=`docker images |grep $list|awk ‘{a=$1":"$2;print a }‘|cut -d ‘/‘ -f $SNUM-`
                        /usr/bin/docker save $RES_TAG -o $BAKDIR/$BAK_NAME.tar >> $LOGFILE 2>&1
                fi
        done
else
        REC=`docker images |awk ‘{print $1,$2,$3}‘|sed 1d >> $TXT`
        IDLIST=`cat $TXT|awk ‘{print $3}‘`
        for i in $IDLIST
        do
                RES_TAG=`docker images |grep $i|awk ‘{a=$1":"$2;print a }‘`
                NUM=`docker images |grep $i |awk ‘{a=$1":"$2;print a }‘|awk -F"/" ‘{print NF-1}‘`
                if [ $NUM -eq 1 ]
                then
                        BAK_NAME=`docker images |grep $i|awk ‘{a=$1":"$2;print a }‘|awk -F"/" ‘{print $2}‘`
                        /usr/bin/docker save $RES_TAG -o $BAKDIR/$BAK_NAME.tar >> $LOGFILE 2>&1

                else
                        SNUM=$[$NUM + 1 ]
                        BAK_NAME=`docker images |grep $i|awk ‘{a=$1":"$2;print a }‘|cut -d ‘/‘ -f $SNUM-`
                        /usr/bin/docker save $RES_TAG -o $BAKDIR/$BAK_NAME.tar >> $LOGFILE 2>&1
                fi
        done
        /usr/bin/rm -f $TXT
fi

if [ -s $LOGFILE ]
then
        echo -e "\033[31mERROR:Images Backup Failed!\033[0m"
        echo -e "\033[31mPlease View The Log Lile : $LOGFILE\033[0m"
else
        /usr/bin/rm -f $LOGFILE
fi

原文地址：https://blog.51cto.com/scorpions/2414948