docker save
Save one or more images to a tar archive (streamed to STDOUT by default)
Usage
$ docker save [OPTIONS] IMAGE [IMAGE...]
Refer to the options section for an overview of available OPTIONS for this command.
Description
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.
For example uses of this command, refer to the examples section below.
Options
| Name, shorthand | Default | Description |
--output , -o |
Write to a file, instead of STDOUT |
Examples
Create a backup that can then be used with docker load.
$ docker save busybox > busybox.tar
$ ls -sh busybox.tar
2.7M busybox.tar
$ docker save --output busybox.tar busybox
$ ls -sh busybox.tar
2.7M busybox.tar
$ docker save -o fedora-all.tar fedora
$ docker save -o fedora-latest.tar fedora:latest
Save an image to a tar.gz file using gzip
You can use gzip to save the image file and make the backup smaller.
$ docker save myimage:latest | gzip > myimage_latest.tar.gz
Cherry-pick particular tags
You can even cherry-pick particular tags of an image repository.
$ docker save -o ubuntu.tar ubuntu:lucid ubuntu:saucy
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https://docs.docker.com/engine/reference/commandline/save/
