docker - 如何在不使用存储库的情况下将Docker映像从一台主机复制到另一台主机(How to copy Docker images from one host to another without using a repository)

Question

How do I transfer a Docker image from one machine to another one without using a repository, no matter private or public?

(如何在不使用存储库的情况下将Docker映像从一台计算机转移到另一台计算机，无论是私有的还是公共的？)

I am used to play and create my own image in VirtualBox, and when it is finished, I try to deploy to other machines to have real usage.

(我习惯于在VirtualBox中播放和创建自己的映像，完成后，我尝试部署到其他计算机上以实际使用。)

Since it is based on own based image (like Red Hat Linux), it cannot be recreated from a Dockerfile.

(由于它基于自己的映像（例如Red Hat Linux），因此无法从Dockerfile重新创建。)

Are there simple commands I can use?

(我可以使用简单的命令吗？)

Or another solution?

(还是其他解决方案？)

It seems save/export can achieve a similar purpose, see What is the difference between save and export in Docker?

(看来保存/导出可以达到类似的目的，请参阅Docker中保存和导出之间有什么区别？)

, and I prefer the save command for my case.

(，对于我的情况，我更喜欢使用save命令。)

  ask by Larry Cai translate from so

Answer 1

You will need to save the Docker image as a tar file:

(您将需要将Docker映像另存为tar文件：)

docker save -o <path for generated tar file> <image name>

Then copy your image to a new system with regular file transfer tools such as cp , scp or rsync (preferred for big files).

(然后使用常规文件传输工具（例如cp ， scp或rsync （对于大文件而言首选））将映像复制到新系统。)

After that you will have to load the image into Docker:

(之后，您必须将映像加载到Docker中：)

docker load -i <path to image tar file>

PS: You may need to sudo all commands.

(PS：您可能需要对所有命令进行sudo 。)

EDIT: You should add filename (not just directory) with -o, for example:

(编辑：您应该使用-o添加文件名（而不仅仅是目录），例如：)

docker save -o c:/myfile.tar centos:16