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Snawoot 4 days ago

How do docker contexts help with the transfer of image between hosts?

dobremeno 4 days ago | parent [-]

I assume OP meant something like this, building the image on the remote host directly using a docker context (which is different from a build context)

  docker context create my-awesome-remote-context --docker "host=ssh://user@remote-host"

  docker --context my-awesome-remote-context build . -t my-image:latest
This way you end up with `my-image:latest` on the remote host too. It has the advantage of not transferring the entire image but only transferring the build context. It builds the actual image on the remote host.
revicon 3 days ago | parent [-]

This is exactly what I do, make a context pointing to the remote host, use docker compose build / up to launch it on the remote system.