创建自己的镜像：通过现有的镜像来创建自己的镜像。

1、首先拉取一个镜像到本地
$ sudo docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ubuntu              12.04               5b117edd0b76        11 months ago       104 MB

2、进入容器
$ sudo docker run -it ubuntu:12.04 bash
$ root@7a61867cf4c5:/#

3、修改容器，这里我们安装zip包
# apt-get install zip
Reading package lists… Done
Building dependency tree       
Reading state information… Done
E: Unable to locate package zip
需要更新，我们更新
root@7a61867cf4c5:/# apt-get update
结束后
root@7a61867cf4c5:/# apt-get install zip
修改后退出
root@7a61867cf4c5:/# exit
exit

4、保存容器到镜像
$ sudo docker commit -m ‘test’ -a ‘zhouhai’ 7a61867cf4c5 ubuntu:latest
sha256:763d1f40ca6b4a801a78b39ddeb526be44330bb65f4ef94dc9267e4f0985627c
查看镜像
$ sudo docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ubuntu              latest              763d1f40ca6b        13 seconds ago      133 MB
ubuntu              12.04               5b117edd0b76        11 months ago       104 MB

5、导出新产生的镜像
$ sudo docker save -o /home/zh/ubuntu_zip.tar ubuntu:latest

6、删除新产生的镜像
$ sudo docker rmi -f ubuntu:latest
Untagged: ubuntu:latest
Deleted: sha256:763d1f40ca6b4a801a78b39ddeb526be44330bb65f4ef94dc9267e4f0985627c
Deleted: sha256:e6e720db3d4ce9b5b07f4e77e6c0608add2d83b218f2b3107800682e29be246b
查看一下
$ sudo docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ubuntu              12.04               5b117edd0b76        11 months ago       104 MB

7、导入刚才保存的镜像
$ sudo docker load –input /home/zh/ubuntu_zip.tar
83c5e276e2c0: Loading layer [==================================================>] 29.82 MB/29.82 MB
Loaded image: ubuntu:latest
查看一下
$ sudo docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
ubuntu              latest              763d1f40ca6b        16 minutes ago      133 MB
ubuntu              12.04               5b117edd0b76        11 months ago       104 MB
进入容器
$ sudo docker run -it ubuntu:latest bash
root@9d1ab685dd74:/# zip
Copyright (c) 1990-2008 Info-ZIP – Type ‘zip “-L”‘ for software license.
Zip 3.0 (July 5th 2008). Usage:
zip [-options] [-b path] [-t mmddyyyy] [-n suffixes] [zipfile list] [-xi list]
  The default action is to add or replace zipfile entries from list, which
  can include the special name – to compress standard input.
  If zipfile and list are omitted, zip compresses stdin to stdout.
  -f   freshen: only changed files  -u   update: only changed or new files
  -d   delete entries in zipfile    -m   move into zipfile (delete OS files)
  -r   recurse into directories     -j   junk (don’t record) directory names
  -0   store only                   -l   convert LF to CR LF (-ll CR LF to LF)
  -1   compress faster              -9   compress better
  -q   quiet operation              -v   verbose operation/print version info
  -c   add one-line comments        -z   add zipfile comment
  -@   read names from stdin        -o   make zipfile as old as latest entry
  -x   exclude the following names  -i   include only the following names
  -F   fix zipfile (-FF try harder) -D   do not add directory entries
  -A   adjust self-extracting exe   -J   junk zipfile prefix (unzipsfx)
  -T   test zipfile integrity       -X   eXclude eXtra file attributes
  -y   store symbolic links as the link instead of the referenced file
  -e   encrypt                      -n   don’t compress these suffixes
  -h2  show more help
大功告成！