Docker镜像Export导出和Import导入

在使用Docker时最头痛的无非无法获取仓库镜像，我们可以通过Export导出镜像备份，通过import导入镜像。导出镜像是通过容器进行导出，下面来看镜像对应的容器：

root@default:~# docker ps
CONTAINER ID        IMAGE                                     COMMAND                  CREATED             STATUS              PORTS                                               NAMES
94f013c55bc2        boonyadocker/tomcat-allow-remote:latest   "/bin/sh -c '/usr/..."   3 weeks ago         Up 4 hours          0.0.0.0:50000->50000/tcp, 0.0.0.0:18080->8080/tcp   optimistic_fermat
aaa1f51447e8        boonyadocker/jenkins:latest               "/bin/sh -c '/usr/..."   4 weeks ago         Up 4 hours          0.0.0.0:8080->8080/tcp                              musing_bohr

1、导出容器镜像

sudo docker export optimistic_fermat > tomcat-allow-remote.tar

2、导入容器镜像

cat tomcat-allow-remote.tar | sudo docker import - boonyadocker/tomcat-allow-remote

3、Export Import命令

http://www.runoob.com/docker/docker-export-command.html

http://blog.csdn.net/clj198606061111/article/details/50450793

4、测试示例

（1）以一个导出的tomcat为例：

root@ubuntu:/usr/local/docker/images-tars# ls
tomcat-allow-remote.tar
root@ubuntu:/usr/local/docker/images-tars# cat tomcat-allow-remote.tar | sudo docker import - boonyadocker/tomcat-allow-remote
ae056a538cec95e23dfdb931b7bc7f5b73b6c3f3f4d005b4ff54d392102b2559
root@ubuntu:/usr/local/docker/images-tars# docker images
REPOSITORY                         TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
boonyadocker/helloworld            latest              7e84b0f9c8a3        5 minutes ago       6.839 kB
boonyadocker/tomcat-allow-remote   latest              ae056a538cec        6 minutes ago       558.8 MB
hello-world                        latest              7a5a2d73abce        6 months ago        1.84 kB
root@ubuntu:/usr/local/docker/images-tars# 

（2）以一个helloworld的打印为例：

root@ubuntu:/home/boonya# ls
hello.tar  logs  rmq_srv_gc.log  zookeeper.out
root@ubuntu:/home/boonya# docker import -  hello.tar
^Z
[2]+  Stopped                 docker import - hello.tar
root@ubuntu:/home/boonya# cat hello.tar | sudo docker import - boonyadocker/helloworld:latest
e12f05d657006477cb449ee7a99e97ede21b86e2eae80291bdf1b9ce7998f457
root@ubuntu:/home/boonya# sudo docker images
REPOSITORY                TAG                 IMAGE ID            CREATED              VIRTUAL SIZE
boonyadocker/helloworld   latest              e12f05d65700        16 seconds ago       1.852 kB
hello-world               latest              7a5a2d73abce        6 months ago         1.84 kB
consol/tomcat-7.0         latest              1439b1fbf911        2.179119 years ago   601.3 MB
root@ubuntu:/home/boonya# 

 镜像快速导出导入：

#查看镜像
docker images
# 镜像导出
docker save -o your_image_file.tar  [image_id]
#镜像导入
docker load < your_image_file.tar