docker將容器做出鏡像的代碼分享

今天小編給大家分享的是docker將容器做出鏡像的代碼，相信很多人都不太了解，為了讓大家更加了解，所以給大家總結了以下內容，一起往下看吧。一定會有所收獲的哦。

做出鏡像可以使用commit命令或dockerfile的方式，commit命令比較簡單，相當于docker根據container內部執行的命令自動生成dockerfile，并進行了build，比較適合對dockerfile不熟悉的用戶；dockerfile比較適合批量處理的場景。

使用docker commit命令做鏡像

1. pull一個centos6.6的基礎鏡像，并運行一個docker container，然后在其中進行定制化（安裝、配置服務等）；

[root@localhost ~]# docker pull centos:6.6
Pulling repository centos
8b44529354f3: Download complete
f1b10cd84249: Download complete
Status: Downloaded newer image for centos:6.6
[root@localhost ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
centos              6.6                 8b44529354f3        4 days ago          202.6 MB
centos              centos6.6           8b44529354f3        4 days ago          202.6 MB
[root@localhost ~]# docker run -i -t centos:6.6 bash
[root@b42c1ba929a9 /]# ls
bin  dev  etc  home  lib  lib64  lost+found  media  mnt  opt  proc  root  sbin  selinux  srv  sys  tmp  usr  var
[root@b42c1ba929a9 /]# mkdir /tmp/test.txt
[root@b42c1ba929a9 /]# exit
exit

接下來，查看一下container的改動：

[root@localhost ~]# docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED              STATUS                      PORTS               NAMES
b42c1ba929a9        centos:6.6          "bash"              About a minute ago   Exited (0) 22 seconds ago                       berserk_mcclintock
804a56ce8008        f1b10cd84249        "/bin/echo hello"   22 minutes ago                                                       test
[root@localhost ~]# docker diff b42c1ba929a9
C /tmp
A /tmp/test.txt
C /root
A /root/.bash_history

2. 執行docker commit命令創建一個鏡像：

[root@localhost ~]# docker commit -m "new container" b42c1ba929a9 yuanhuan/newcontainer1
07b146e0be9e98c253122784c3837dd1604f7692e794f3601dad747d41901cd4
[root@localhost ~]# docker images
REPOSITORY               TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
yuanhuan/newcontainer1   latest              07b146e0be9e        43 seconds ago      202.6 MB
centos                   6.6                 8b44529354f3        4 days ago          202.6 MB
centos                   centos6.6           8b44529354f3        4 days ago          202.6 MB

3. 登錄docker，并將該鏡像push到docker倉庫：

[root@localhost ~]# docker login
Username: yuanhuan
Password:
Email: yuanhuan_2005@126.com
Login Succeeded
[root@localhost ~]# docker push yuanhuan/newcontainer1
The push refers to a repository [yuanhuan/newcontainer1] (len: 1)
Sending image list
Pushing repository yuanhuan/newcontainer1 (1 tags)
f1b10cd84249: Image already pushed, skipping
8b44529354f3: Image already pushed, skipping
07b146e0be9e: Image successfully pushed
Pushing tag for rev [07b146e0be9e] on {https://cdn-registry-1.docker.io/v1/repositories/yuanhuan/newcontainer1/tags/latest}

關于docker將容器做出鏡像的代碼就分享到這里了，希望以上內容可以對大家有一定的參考價值，可以學以致用。如果喜歡本篇文章，不妨把它分享出去讓更多的人看到。