Docker save without docker pull

Question

I would like to save a docker image as a tar file. I can

docker pull my_repo/image:latest
docker save -o image.tar my_repo/image:latest

Is there a way to bypass the docker pull? What I would like to do is just

docker save -o image.tar my_repo/image:latest

When I try docker save alone I get: Error response from daemon: reference does not exist

Thanks

Answer 1

您必须在本地实际拥有图像，然后才能使用docker save。（不像docker run它不会自己拉它。）

如果您有图像的来源，它同样适用于

docker build -t my_repo/image:latest .
docker save -o image.tar my_repo/image:latest

如果你不这样做，那么你docker pull首先需要它，正如你在问题中所说的那样；没有办法解决这个问题。