1、查看镜像ID
# docker images
[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
mytomcat 1.0 f8ec6dad9608 minutes ago 612MB
centos latest 1e1148e4cc2c weeks ago 202MB
2、选择要打包的镜像，执行打包命令
docker save : 将指定镜像保存成 tar 归档文件
语法：
docker save [options] image [image……]
options
-o :输出到的文件。
# docker save -o mytomcat.tar mytomcat:1.0
[root@localhost ~]# docker save -o mytomcat.tar mytomcat:1.0
[root@localhost ~]#
[root@localhost ~]# ls
anaconda-ks.cfg mytomcat.tar
3、scp远程复制到迁移的另一台服务器上
# scp -r mytomcat.tar root@192.168.2.207:/root/
[root@localhost ~]# scp -r mytomcat.tar root@192.168.2.207:/root/
The authenticity of host '192.168.2.207 (192.168.2.207)' can't be established.
ECDSA key fingerprint is fa:8c:a3:e2::7e:cc:be:1e:::6a:e7::de:.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.2.207' (ECDSA) to the list of known hosts.
root@192.168.2.207's password:
mytomcat.tar % 594MB .6MB/s :
[root@localhost ~]#
4、到另一台服务器上导入
查看已有的镜像
# docker images
[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
mysql latest 102816b1ee7d weeks ago 486MB
导入镜像
# docker load -i mytomcat.tar
[root@localhost ~]# ls
mytomcat.tar software
[root@localhost ~]#
[root@localhost ~]# docker load -i mytomcat.tar
071d8bd76517: Loading layer [==================================================>] .2MB/.2MB
cc30c42de5c4: Loading layer [==================================================>] .5MB/.5MB
Loaded image: mytomcat:1.0
[root@localhost ~]#
查看是否成功导入
[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
mytomcat 1.0 f8ec6dad9608 Less than a second ago 612MB
mysql latest 102816b1ee7d weeks ago 486MB
end