Docker image push over SSH (distributed)

Question

TL;DR Basically, I am looking for this:

docker push myimage ssh://myvps01.vpsprovider.net/

I am failing to grasp the rationale

Answer 1

If you want to push docker images to a given host, there is already everything in Docker to allow this. The following example shows how to push a docker image through ssh:

docker save  | ssh -C user@my.remote.host.com docker load

• docker save will produce a tar archive of one of your docker images (including its layers)
• -C is for ssh to compress the data stream
• docker load creates a docker image from a tar archive

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Note that the combination of a docker registry + docker pull command has the advantage of only downloading missing layers. So if you frequently update a docker image (adding new layers, or modifying a few last layers) then the docker pull command would generate less network traffic than pushing complete docker images through ssh.