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docker基础命令详解

时间：2015-09-23 19:11:02      阅读：161      评论：0      收藏：0      [点我收藏+]

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Commands:  

    attach    Attach to a running container                                                                                              

    build     Build an image from a Dockerfile                                                  

    commit    Create a new image from a container‘s changes  

    cp        Copy files/folders from a container‘s filesystem to the host path  

    create    Create a new container  

    diff      Inspect changes on a container‘s filesystem  

    events    Get real time events from the server  

    exec      Run a command in a running container  

    export    Stream the contents of a container as a tar archive  

    history   Show the history of an image  

    images    List images  

    import    Create a new filesystem image from the contents of a tarball  

    info      Display system-wide information  

    inspect   Return low-level information on a container  

    kill      Kill a running container  

    load      Load an image from a tar archive  

    login     Register or log in to a Docker registry server  

    logout    Log out from a Docker registry server  

    logs      Fetch the logs of a container  

    port      Lookup the public-facing port that is NAT-ed to PRIVATE_PORT  

    pause     Pause all processes within a container  

    ps        List containers  

    pull      Pull an image or a repository from a Docker registry server  

    push      Push an image or a repository to a Docker registry server  

    restart   Restart a running container  

    rm        Remove one or more containers  

    rmi       Remove one or more images  

    run       Run a command in a new container  

    save      Save an image to a tar archive  

    search    Search for an image on the Docker Hub  

    start     Start a stopped container  

    stop      Stop a running container  

    tag       Tag an image into a repository  

    top       Lookup the running processes of a container  

    unpause   Unpause a paused container  

    version   Show the Docker version information  

    wait      Block until a container stops, then print its exit code

 

 

 

常用命令

总结一下常用命令:

其中<>阔起来的参数为必选，[]阔起来为可选

  • docker version 查看docker的版本号，包括客户端、服务端、依赖的Go等
  • docker info 查看系统(docker)层面信息，包括管理的images, containers数等
  • docker search <image> 在docker index中搜索image
  • docker pull <image> 从docker registry server 中下拉image
  • docker push <image|repository> 推送一个image或repository到registry
  • docker push <image|repository>:TAG 同上，指定tag
  • docker inspect <image|container> 查看image或container的底层信息
  • docker images TODO filter out the intermediate image layers (intermediate image layers 是什么)
  • docker images -a 列出所有的images
  • docker ps 默认显示正在运行中的container
  • docker ps -l 显示最后一次创建的container，包括未运行的
  • docker ps -a 显示所有的container，包括未运行的
  • docker logs <container> 查看container的日志，也就是执行命令的一些输出
  • docker rm <container...> 删除一个或多个container
  • docker rm `docker ps -a -q` 删除所有的container
  • docker ps -a -q | xargs docker rm 同上, 删除所有的container
  • docker rmi <image...> 删除一个或多个image
  • docker start/stop/restart <container> 开启/停止/重启container
  • docker start -i <container> 启动一个container并进入交互模式
  • docker attach <container> attach一个运行中的container
  • docker run <image> <command> 使用image创建container并执行相应命令，然后停止
  • docker run -i -t <image> /bin/bash 使用image创建container并进入交互模式, login shell是/bin/bash
  • docker run -i -t -p <host_port:contain_port> 将container的端口映射到宿主机的端口
  • docker commit <container> [repo:tag] 将一个container固化为一个新的image，后面的repo:tag可选
  • docker build <path> 寻找path路径下名为的Dockerfile的配置文件，使用此配置生成新的image
  • docker build -t repo[:tag] 同上，可以指定repo和可选的tag
  • docker build - < <dockerfile> 使用指定的dockerfile配置文件，docker以stdin方式获取内容，使用此配置生成新的image
  • docker port <container> <container port> 查看本地哪个端口映射到container的指定端口，其实用docker ps 也可以看到

使用images新建一个container并登录

使用image来创建container:

root@tankywoo-docker:~# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
ubuntu              13.10               5e019ab7bf6d        12 days ago         180 MB
ubuntu              saucy               5e019ab7bf6d        12 days ago         180 MB
ubuntu              12.04               74fe38d11401        12 days ago         209.6 MB
ubuntu              precise             74fe38d11401        12 days ago         209.6 MB

root@tankywoo-docker:~# docker run -i -t 74fe38d11401 /bin/bash

root@80c761d06a87:/# cat /etc/issue
Ubuntu 12.04.4 LTS \n \l

使用repository来创建container, 这时默认使用tag为lastest的image:

root@tankywoo-docker:~# docker run -i -t ubuntu /bin/bash
root@442e1cc85a8d:/# uname -a
Linux 442e1cc85a8d 3.8.0-25-generic #37~precise1-Ubuntu SMP Fri Jun 7 16:27:35 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
root@442e1cc85a8d:/# cat /etc/issue
Ubuntu 14.04 LTS \n \l

root@442e1cc85a8d:/# exit

使用commit将一个container固化为一个image

root@tankywoo-docker:~# docker ps -l
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                        PORTS               NAMES
f1fd375204af        ubuntu:12.04        /bin/bash           10 minutes ago      Exited (127) 48 seconds ago                       lonely_colden

root@tankywoo-docker:~# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
ubuntu              13.10               5e019ab7bf6d        12 days ago         180 MB
ubuntu              saucy               5e019ab7bf6d        12 days ago         180 MB
ubuntu              12.04               74fe38d11401        12 days ago         209.6 MB

提交当前container为一个image，顺便带上作者信息，并指定repository 和 tag

root@tankywoo-docker:~# docker commit -a "Tanky Woo <me@tankywoo.com>" f1fd375204af ubuntu:test
fe65a2781daea01c67c33f11868abe6d510833bca07b90fc681cdfe98a9196ac

root@tankywoo-docker:~# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
ubuntu              test                fe65a2781dae        6 seconds ago       209.6 MB
ubuntu              13.10               5e019ab7bf6d        12 days ago         180 MB
ubuntu              saucy               5e019ab7bf6d        12 days ago         180 MB

attach一个运行中的容器

root@tankywoo-docker:~# docker ps -l
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                      PORTS               NAMES
e2e6c95f0bf5        ubuntu:test         /bin/bash           11 minutes ago      Exited (0) 11 minutes ago                       suspicious_mccarthy

启动一个container:

root@tankywoo-docker:~# docker start e2e6c95f0bf5
e2e6c95f0bf5

可以看此container到正在运行中:

root@tankywoo-docker:~# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
e2e6c95f0bf5        ubuntu:test         /bin/bash           11 minutes ago      Up 2 seconds                            suspicious_mccarthy

attach这个container:

root@tankywoo-docker:~# docker attach e2e6c95f0bf5

进入container:

root@e2e6c95f0bf5:/#

docker build 构建

root@tankywoo-docker:~# cat Dockerfile
FROM ubuntu:test
ENTRYPOINT echo "Welcome!"

root@tankywoo-docker:~# docker build -t ubuntu:newtest - < Dockerfile
Uploading context 2.048 kB
Uploading context
Step 0 : FROM ubuntu:test
 ---> fe65a2781dae
Step 1 : ENTRYPOINT echo "Welcome!"
 ---> Running in 09a062a296c5
 ---> f8104f05df90
Successfully built f8104f05df90
Removing intermediate container 09a062a296c5
root@tankywoo-docker:~# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
ubuntu              newtest             f8104f05df90        8 seconds ago       209.6 MB
ubuntu              test                fe65a2781dae        23 minutes ago      209.6 MB
ubuntu              13.10               5e019ab7bf6d        12 days ago         180 MB
ubuntu              saucy               5e019ab7bf6d        12 days ago         180 MB
ubuntu              precise             74fe38d11401        12 days ago         209.6 MB
ubuntu              12.04               74fe38d11401        12 days ago         209.6 MB
ubuntu              12.10               a7cf8ae4e998        12 days ago         171.3 MB
ubuntu              quantal             a7cf8ae4e998        12 days ago         171.3 MB
ubuntu              14.04               99ec81b80c55        12 days ago         266 MB
ubuntu              trusty              99ec81b80c55        12 days ago         266 MB
ubuntu              latest              99ec81b80c55        12 days ago         266 MB
ubuntu              13.04               316b678ddf48        12 days ago         169.4 MB
ubuntu              raring              316b678ddf48        12 days ago         169.4 MB
ubuntu              10.04               3db9c44f4520        2 weeks ago         183 MB
ubuntu              lucid               3db9c44f4520        2 weeks ago         183 MB

root@tankywoo-docker:~# docker run ubuntu:newtest
2014/05/07 17:30:34 Unrecognized input header
root@tankywoo-docker:~# docker run -i -t ubuntu:newtest /bin/bash
Welcome!

TODO: 为何要使用 -i 和 -t

使用 docker run -p 的例子

镜像ubuntu:12.04没有vi，没法编辑/etc/apt/sources.list

现在本地有一份，想上传上去

首先映射端口(宿主的2222端口和container的33333端口映射):

docker run -i -t -p 22222:33333 fe65a2781dae /bin/bash

container上监听33333：

nc -l -p 33333 > /etc/apt/sources.list

本地使用22222端口传输:

nc localhost 22222 < sources.list

查看映射的端口

root@tankywoo-docker:~# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                      NAMES
7abe8e31ac8b        ubuntu:test         /bin/bash           15 minutes ago      Up 15 minutes       0.0.0.0:22222->33333/tcp   hungry_carson

root@tankywoo-docker:~# docker port 7abe8e31ac8b 33333
0.0.0.0:22222

root@tankywoo-docker:~# netstat -tlnp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      528/sshd
tcp6       0      0 :::22222                :::*                    LISTEN      12946/docker
tcp6       0      0 :::22                   :::*                    LISTEN      528/sshd

但是这里很好奇为啥是监听在ipv4的地址上?

删除image/container遇到的依赖关系

关于删除时的依赖关系，按照提示删除就行了

比如删除images时，需要先删除通过它创建的所有containers:

root@tankywoo-docker:~# docker rmi 666c5d65f396 3494872e31a4 62fda5e450d5 5e1829f90d6e 89554a25c998
Error: Conflict, cannot delete 666c5d65f396 because the container 43a7072bac7a is using it
Error: Conflict, cannot delete 3494872e31a4 because the container 40b3cd8b2e42 is using it
Error: Conflict, cannot delete 62fda5e450d5 because the container 5142a3d092a6 is using it
Untagged: test:latest
Deleted: 5e1829f90d6e9ac09645841fe6ab85a0b0f9b28f008a571299a624e566684afe
Deleted: ae5ae236a8e1d946963a7c2c142cc892b1979cb9458e0ecac4d33d2283ace567
Untagged: memchaced:latest
Deleted: 89554a25c998d14c76ff885ddac7cc1a47ae4caf9edcddaa43408b402a1684fb
2014/05/07 15:44:41 Error: failed to remove one or more images

root@tankywoo-docker:~# docker rm 43a7072bac7a 40b3cd8b2e42 5142a3d092a6
43a7072bac7a
40b3cd8b2e42
5142a3d092a6

且删除images时也可能会遇到依赖其它的images，比如直接删除父镜像时，就会提示需要先删除子镜像。

可以通过:

docker images --tree

来查看，不过官方提示 --tree 已经弃用了，会在以后的版本去掉.

首先清空所有containers:

root@tankywoo-docker:~# docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

然后以树形结构查看依赖关系:

root@tankywoo-docker:~# docker images --tree
Warning: ‘--tree‘ is deprecated, it will be removed soon. See usage.
└─511136ea3c5a Virtual Size: 0 B
  ├─e2aa6665d371 Virtual Size: 106.1 MB
  │ └─f0ee64c4df74 Virtual Size: 106.3 MB
  │   └─2209cbf9dcd3 Virtual Size: 106.3 MB
  │     └─5e019ab7bf6d Virtual Size: 180 MB Tags: ubuntu:13.10, ubuntu:saucy
  ├─f10ebce2c0e1 Virtual Size: 103.7 MB
  │ └─82cdea7ab5b5 Virtual Size: 103.9 MB
  │   └─5dbd9cb5a02f Virtual Size: 103.9 MB
  │     └─74fe38d11401 Virtual Size: 209.6 MB Tags: ubuntu:precise, ubuntu:12.04
  │       └─fe65a2781dae Virtual Size: 209.6 MB Tags: ubuntu:test
  │         └─276cc641e40e Virtual Size: 388.3 MB Tags: ubuntu:newtest
  ├─ef519c9ee91a Virtual Size: 100.9 MB
  │ └─07302703becc Virtual Size: 101.2 MB
  │   └─cf8dc907452c Virtual Size: 101.2 MB
  │     └─a7cf8ae4e998 Virtual Size: 171.3 MB Tags: ubuntu:12.10, ubuntu:quantal
  ├─5e66087f3ffe Virtual Size: 192.5 MB
  │ └─4d26dd3ebc1c Virtual Size: 192.7 MB
  │   └─d4010efcfd86 Virtual Size: 192.7 MB
  │     └─99ec81b80c55 Virtual Size: 266 MB Tags: ubuntu:14.04, ubuntu:latest, ubuntu:trusty
  ├─02dae1c13f51 Virtual Size: 98.35 MB
  │ └─e7206bfc66aa Virtual Size: 98.54 MB
  │   └─cb12405ee8fa Virtual Size: 98.54 MB
  │     └─316b678ddf48 Virtual Size: 169.4 MB Tags: ubuntu:raring, ubuntu:13.04
  └─6cfa4d1f33fb Virtual Size: 0 B
    └─3db9c44f4520 Virtual Size: 183 MB Tags: ubuntu:10.04, ubuntu:lucid

现在准备删除12.10版本的父镜像 cf8dc907452c, 会提示有冲突，删不掉:

root@tankywoo-docker:~# docker rmi cf8dc907452c
Error: Conflict, cf8dc907452c wasn‘t deleted
2014/05/07 18:49:35 Error: failed to remove one or more images

但是可以删除叶子节点 a7cf8ae4e998:

root@tankywoo-docker:~# docker rmi a7cf8ae4e998
Untagged: ubuntu:12.10
Untagged: ubuntu:quantal
Deleted: a7cf8ae4e998c5339e769d6cc466f9133bd4d330a549bb846cb1641cd638247c
Deleted: cf8dc907452c970224551599da573c9e32897fc65286d942625c4c86dabd680d
Deleted: 07302703beccc2ea25f34333decad32ed06446e8a14c020ffbd0be017364b9fe
Deleted: ef519c9ee91a06fc33cefbda1bce27686617761700252dff0397f2c0e269f3c5

containers之间共享数据

docker 的 containers之间共享目录是通过 volume 。

docker run 命令使用 -v 可以绑定一个volume, -v 可以使用多次，创建多个volume:

root@tankywoo-docker:~# docker run -i -t -v /tmp/tankywoo --name data ubuntu:newtest /bin/bash                         [6/3516]

使用 mount 看到 /tmp/tankywoo 已经被mount了:

root@fec65f523cef:/# mount
none on / type aufs (rw,relatime,si=f7ac8b1595d13ed9)
...
/dev/disk/by-uuid/b77aed99-bb9b-4881-9702-4ed204fe5d46 on /tmp/tankywoo type ext3 (rw,relatime,errors=remount-ro,user_xattr,acl,barrier=1,data=ordered)

查看 /tmp/tankywoo 目录下，是空的:

root@fec65f523cef:/tmp/tankywoo# ls
root@fec65f523cef:/tmp/tankywoo#

然后在宿主机新建一个container，来绑定这个volume:

按照 docker run 的命令行参数:

  --volumes-from=[]: Mount volumes from the specified container(s)

有问题:

root@tankywoo-docker:/tmp/tankywoo# docker run -i -t --volumes-from=["data"] ubuntu:newtest /bin/bash                       [21/158]
2014/05/08 15:58:19 Error: Cannot start container 5d83dcaf8f0220024e0403a362c0512a8218cfcb45dc911df5d2cd37f9a4e8a4: Container [data] not found. Impossible to mount its volumes

必须像short option的方式使用:

root@tankywoo-docker:/tmp/tankywoo# docker run -i -t --volumes-from data ubuntu:newtest /bin/bash

root@d100d9604b4b:/# mount
none on / type aufs (rw,relatime,si=f7ac8b15b25036d9)
...
/dev/disk/by-uuid/b77aed99-bb9b-4881-9702-4ed204fe5d46 on /tmp/tankywoo type ext3 (rw,relatime,errors=remount-ro,user_xattr,acl,barrier=1,data=ordered)

也可以看到 /tmp/tankywoo 目录，并且是空的，然后新建一个文件:

root@d100d9604b4b:/tmp/tankywoo# ls
root@d100d9604b4b:/tmp/tankywoo# touch file
root@d100d9604b4b:/tmp/tankywoo# ls
file

再看看之前那个container:

root@fec65f523cef:/tmp/tankywoo# ls
file

也有这个文件了

参考

退出container但是保持运行

默认情况下，如果使用ctrl-c退出container,那么container也会stop

按ctrl-p ctrl-q可以退出到宿主机，而保持container仍然在运行

Docker被墙

关于 Docker 被墙，老甘的文章里提到的修改hosts文件，先mark，未验证:

# /etc/hosts
54.234.135.251 get.docker.io 
54.234.135.251 cdn-registry-1.docker.io

遗留的问题

有时docker执行不了任何命令(会卡住)，包括重启docker server，在日志里看到这些:

May  5 17:41:48 tpl-ubuntu12-04 kernel: [99589.489241] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:41:58 tpl-ubuntu12-04 kernel: [99599.708117] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:42:08 tpl-ubuntu12-04 kernel: [99609.927057] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:42:18 tpl-ubuntu12-04 kernel: [99620.145993] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:42:29 tpl-ubuntu12-04 kernel: [99630.364922] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:42:39 tpl-ubuntu12-04 kernel: [99640.583850] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:42:49 tpl-ubuntu12-04 kernel: [99650.802794] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:42:59 tpl-ubuntu12-04 kernel: [99661.021726] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:43:10 tpl-ubuntu12-04 kernel: [99671.240662] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:43:20 tpl-ubuntu12-04 kernel: [99681.459572] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:43:30 tpl-ubuntu12-04 kernel: [99691.678530] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:43:40 tpl-ubuntu12-04 kernel: [99701.897432] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:43:51 tpl-ubuntu12-04 kernel: [99712.128370] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:44:01 tpl-ubuntu12-04 kernel: [99722.347289] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:44:11 tpl-ubuntu12-04 kernel: [99732.566226] unregister_netdevice: waiting for lo to become free. Usage count = 3
May  5 17:44:21 tpl-ubuntu12-04 kernel: [99742.785141] unregister_netdevice: waiting for lo to become free. Usage count = 3

什么是Layer

Docker images are built up in layers. So, for instance, if you need to run WordPress, you would build the Ubuntu layer, add a layer for Apache2 web server, add a PHP layer and then a layer for the WordPress files. Lower layers can be re-used. We might take the PHP layer and layer on Drupal instead of WordPress, or update our WordPress layer with a newer version or Wordpress.

Because we can re-use layers, we can make new docker images very cheaply. We can create a new docker image by changing just a single line of one file and we do not have to rebuild the whole stack.

The beauty of docker images being “just files” means that the difference between two docker images is just a diff of the files they contain.

Hykes Explains Docker

概念上的问题

The Docker Guidebook 的简单对比:

Image : An image is a read only layer used to build a container. They do not change.

Container : Is basically a self contained runtime environment that is built using one or more images. You can commit your changes to a container and create an image.

index / registry : These are public or private servers where people can upload their repositories so they can easily share what they made.

Repository : A repository is a group of images located in the docker registry. There are two types of repositories, Top level and user repositories. Top level repositories don‘t have a ‘/‘ in the name and they are usually reserved for base images. These Top level repositories is what most people build their repositories on top of. They are controlled by the maintainers of Docker. User repositories are repositories that anyone can upload into the registry and share with other people.

说直接点，Image和Container最容易理解和对比，它俩的关系就像类与类的实例这两的关系一样。

其实Index和Registry也有区别，主要就是Index存储的是用户信息、images的checksum；而Registry存储的是images。具体见官方文档Registry & Index Spec。

另外，关于Repository与Registry和Image又是什么关系?

root@tankywoo-docker:~/docker-registry-master# docker images
REPOSITORY              TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
10.2.15.190/tankywoo        latest              276cc641e40e        4 days ago          388.3 MB
10.2.15.190:5000/tankywoo   latest              276cc641e40e        4 days ago          388.3 MB
ubuntu                  newtest             276cc641e40e        4 days ago          388.3 MB
ubuntu                  test                fe65a2781dae        4 days ago          209.6 MB
ubuntu                  13.10               5e019ab7bf6d        2 weeks ago         180 MB
ubuntu                  saucy               5e019ab7bf6d        2 weeks ago         180 MB
ubuntu                  12.04               74fe38d11401        2 weeks ago         209.6 MB
ubuntu                  precise             74fe38d11401        2 weeks ago         209.6 MB
ubuntu                  14.04               99ec81b80c55        2 weeks ago         266 MB
ubuntu                  latest              99ec81b80c55        2 weeks ago         266 MB
ubuntu                  trusty              99ec81b80c55        2 weeks ago         266 MB
ubuntu                  13.04               316b678ddf48        2 weeks ago         169.4 MB
ubuntu                  raring              316b678ddf48        2 weeks ago         169.4 MB
busybox                 latest              2d8e5b282c81        2 weeks ago         2.489 MB
ubuntu                  10.04               3db9c44f4520        2 weeks ago         183 MB
ubuntu                  lucid               3db9c44f4520        2 weeks ago         183 MB

以这个为例

这里的ubuntu是image名称吗？(后面解答)

一个image完整的名称是:

username/image_name:tag

docker整体和Github非常像，image管理也不例外。

其中，如果username没有写，则被认为是官方认证过的image。如前面提到，如果tag没有写，则被认为tag是lastest。

另外，如果username写了，如 tankywoo/ubuntu，则会在官方index中查找username为tankywoo的ubuntu仓库；如果写的如上10.2.15.190:5000/tankywoo，则10.2.15.190:5000则被认为是第三方registry的地址。

所以如上所说，ubuntu并不是image的名称，而是repository的名称。

再看看/var/lib/docker/ 下的 repositories-aufs，这是一个repositories的json列表:

root@tankywoo-docker:~/docker-registry-master# cat /var/lib/docker/repositories-aufs | python -m json.tool
{
    "Repositories": {
        "10.2.15.190/tankywoo": {
            "latest": "276cc641e40e01a18f6bee9e81a576adb7090d3fbae098f809857e0696ccbc87"
        },
        "10.2.15.190:5000/tankywoo": {
            "latest": "276cc641e40e01a18f6bee9e81a576adb7090d3fbae098f809857e0696ccbc87"
        },
        "busybox": {
            "latest": "2d8e5b282c81244037eb15b2068e1c46319c1a42b80493acb128da24b2090739"
        },
        "ubuntu": {
            "10.04": "3db9c44f45209632d6050b35958829c3a2aa256d81b9a7be45b362ff85c54710",
            "12.04": "74fe38d114018aac73c5997b95263090048ec9a1f58f33a1b53f55e92156d53b",
            "13.04": "316b678ddf487a37012630ae3219c8bb78c1f4b58d31c9513c3ea6b88f9e5635",
            "13.10": "5e019ab7bf6deb75b211411ef7257d1e76bf7edee31d9da62a392df98d0529d6",
            "14.04": "99ec81b80c55d906afd8179560fdab0ee93e32c52053816ca1d531597c1ff48f",
            "latest": "99ec81b80c55d906afd8179560fdab0ee93e32c52053816ca1d531597c1ff48f",
            "lucid": "3db9c44f45209632d6050b35958829c3a2aa256d81b9a7be45b362ff85c54710",
            "newtest": "276cc641e40e01a18f6bee9e81a576adb7090d3fbae098f809857e0696ccbc87",
            "precise": "74fe38d114018aac73c5997b95263090048ec9a1f58f33a1b53f55e92156d53b",
            "raring": "316b678ddf487a37012630ae3219c8bb78c1f4b58d31c9513c3ea6b88f9e5635",
            "saucy": "5e019ab7bf6deb75b211411ef7257d1e76bf7edee31d9da62a392df98d0529d6",
            "test": "fe65a2781daea01c67c33f11868abe6d510833bca07b90fc681cdfe98a9196ac",
            "trusty": "99ec81b80c55d906afd8179560fdab0ee93e32c52053816ca1d531597c1ff48f"
        }
    }
}

docker基础命令详解

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原文地址：http://www.cnblogs.com/sunofwe/p/4832638.html
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