save
1 2 3 4 5 6 | Usage: docker save [OPTIONS] IMAGE [IMAGE...]Save one or more images to a tar archive (streamed to STDOUT by default) --help Print usage -o, --output="" Write to a file, instead of STDOUT |
Produces a tarred repository to the standard output stream. Contains all parent layers, and all tags + versions, or specified repo:tag, for each argument provided.
It is used to create a backup that can then be used with docker load
1 2 3 4 5 6 7 8 | $ docker save busybox > busybox.tar$ ls -sh busybox.tar2.7M busybox.tar$ docker save --output busybox.tar busybox$ ls -sh busybox.tar2.7M busybox.tar$ docker save -o fedora-all.tar fedora$ docker save -o fedora-latest.tar fedora:latest |
It is even useful to cherry-pick particular tags of an image repository
1 | $ docker save -o ubuntu.tar ubuntu:lucid ubuntu:saucy |
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