标记(Tag),推送(Push),拉取(Pull)你本身的镜像

目录

• 开始使用Docker
• 在OS X安装Docker
• 理解镜像(images)和容器(containers)
• 搜索&运行whalesay镜像
• 构建你本身的镜像
• 建立Docker Hub帐号(account)&库(repository)
• 标记(Tag),推送(Push),拉取(Pull)你本身的镜像

在这一部分, 你会标记, 推送你的docker-whale镜像到你刚才新建好的Hub库中. 当你作好只好, 你能够拉去你的新镜像来测试你的Hub库是否正常.

第一步: 标记和推送镜像

If you don’t already have a terminal open, open one now:

1. 打开Launchpad并定位到Docker Quickstart Terminal图标.

2. 点击Docker Quickstart Terminal图标, 打开一个窗口.

3. 将光标定位到Docker Quickstart Terminal窗口

4. 输入docker images命令来查看当前的镜像列表:

   $ docker images
   REPOSITORY           TAG          IMAGE ID            CREATED             VIRTUAL SIZE
   docker-whale         latest       7d9495d03763        38 minutes ago      273.7 MB
   <none>               <none>       5dac217f722c        45 minutes ago      273.7 MB
   docker/whalesay      latest       fb434121fc77        4 hours ago         247 MB
   hello-world          latest       91c95931e552        5 weeks ago         910 B

5. 找到docker-whale镜像的image id

   在这个例子中, id是7d9495d03763

   值得注意的是, Hub库显示的是库的名称而不是命名空间. 对于Docker Hub将docker-whale镜像与Docker Hub账户相关联后, 你须要为它重命名为YOUR_DOCKERHUB_USERNAME/docker-whale. 您的账户名称会在Docker Hub中显示镜像的命名空间. 你会在下一步标记镜像中作到这一点.

6. 使用IMAGE ID和docker tag命令来标记docker-whale镜像.

   命令看来起来像这样子:

   固然你的帐户名称应该是你本身的, 因此, 你要在这个命令中使用本身的帐户名称和镜像ID, 而后按回车.

   $ docker tag 7d9495d03763 maryatdocker/docker-whale:latest

7. 再次输入docker images命令来查看当前的镜像列表:

   $ docker images
   REPOSITORY           TAG          IMAGE ID            CREATED             VIRTUAL SIZE
   docker-whale         latest       7d9495d03763        38 minutes ago      273.7 MB
   <none>               <none>       5dac217f722c        45 minutes ago      273.7 MB
   docker/whalesay      latest       fb434121fc77        4 hours ago         247 MB
   hello-world          latest       91c95931e552        5 weeks ago         910 B

8. 使用docker login命令从命令行登录Docker Hub

   登录命令的格式是这样的:

   docker login --username=yourhubusername --email=youremail@company.com

   当命令返回响应是, 输入你的密码并按回车, 因此, 像这样:

   $ docker login --username=maryatdocker --email=mary@docker.com
   Password:
   WARNING: login credentials saved in C:\Users\sven\.docker\config.json
   Login Succeeded

9. 输入docker push命令来推送你的镜像到Hub库

   $ docker push maryatdocker/docker-whale
   The push refers to a repository [maryatdocker/docker-whale] (len: 1)
   7d9495d03763: Image already exists
   c81071adeeb5: Image successfully pushed
   eb06e47a01d2: Image successfully pushed
   fb434121fc77: Image successfully pushed
   5d5bd9951e26: Image successfully pushed
   99da72cfe067: Image successfully pushed
   1722f41ddcb5: Image successfully pushed
   5b74edbcaa5b: Image successfully pushed
   676c4a1897e6: Image successfully pushed
   07f8e8c5e660: Image successfully pushed
   37bea4ee0c81: Image successfully pushed
   a82efea989f9: Image successfully pushed
   e9e06b06e14c: Image successfully pushed
   Digest: sha256:ad89e88beb7dc73bf55d456e2c600e0a39dd6c9500d7cd8d1025626c4b985011

10. 返回你在Docker Hub的页面查看你的新镜像

第二步: 拉取新镜像

在这最后一节，你会拉取你刚刚推送到Docker Hub上的镜像。在此以前, 你须要从本地计算机中删除原始镜像. 若是你没有删除, Docker不会从Hub上拉取镜像 - 为何这样呢？由于两个图像是相同的.

1. 将光标定位到Docker Quickstart Terminal窗口

2. 输入docker images来列出你当前在本地的镜像列表

   $ docker images
   REPOSITORY                  TAG       IMAGE ID        CREATED          VIRTUAL SIZE
   maryatdocker/docker-whale   latest    7d9495d03763    5 minutes ago    273.7 MB
   docker-whale                latest    7d9495d03763    2 hours ago      273.7 MB
   <none>                      <none>    5dac217f722c    5 hours ago      273.7 MB
   docker/whalesay             latest    fb434121fc77    5 hours ago      247 MB
   hello-world                 latest    91c95931e552    5 weeks ago      910 B

   为了测试成功，你须要从本地系统中删除了鲸和泊坞窗鲸图像。删除maryatdocker/docker-whale 和 docker-whale. 它们迫使下次使用docker pull时, Docker从Hub库中获取镜像.

3. 使用docker rmi删除maryatdocker/docker-whale和docker-whale镜像.

   你可使用镜像ID或者名称删除

   $ docker rmi -f 7d9495d03763
   $ docker rmi -f docker-whale

4. 使用docker run命令从你的Hub库中拉取并加载新的镜像

   docker run yourusername/docker-whale

   因为镜像再也不在本地系统上，Dokcer要下载它。

   $ docker run maryatdocker/docker-whale
   Unable to find image 'maryatdocker/docker-whale:latest' locally
   latest: Pulling from maryatdocker/docker-whale
   eb06e47a01d2: Pull complete
   c81071adeeb5: Pull complete
   7d9495d03763: Already exists
   e9e06b06e14c: Already exists
   a82efea989f9: Already exists
   37bea4ee0c81: Already exists
   07f8e8c5e660: Already exists
   676c4a1897e6: Already exists
   5b74edbcaa5b: Already exists
   1722f41ddcb5: Already exists
   99da72cfe067: Already exists
   5d5bd9951e26: Already exists
   fb434121fc77: Already exists
   Digest: sha256:ad89e88beb7dc73bf55d456e2c600e0a39dd6c9500d7cd8d1025626c4b985011
   Status: Downloaded newer image for maryatdocker/docker-whale:latest
    ________________________________________
   / Having wandered helplessly into a      \
   | blinding snowstorm Sam was greatly     |
   | relieved to see a sturdy Saint Bernard |
   | dog bounding toward him with the |
   | traditional keg of brandy strapped to |
   | his collar.                            |
   |                                        |
   | "At last," cried Sam, "man's best | \ friend -- and a great big dog, too!"   /
    ----------------------------------------
               \
                \
                 \
                         ##        .
                   ## ## ##       ==
                ## ## ## ##      ===
            /""""""""""""""""___/ ===
       ~~~ {~~ ~~~~ ~~~ ~~~~ ~~ ~ /  ===- ~~~
            \______ o          __/
             \    \        __/
               \____\______/

下一步去哪里

你已经作了不少，你已经作了全部的如下基本Docker任务。

• 安装Docker
• 在容器中运行的软件镜像
• 在Docker Hub中查找有趣的镜像
• 你本身的机器上运行镜像
• 修改镜像, 建立新的镜像并运行
• 建立Docker Hub账户和库
• 推送你的镜像到Docker Hub与他人分享

不过至此, 你只是接触了Docker全部能作的基本内容. 转到下一个页面, 了解更多信息.