docker image save
| 内容説明 | Save one or more images to a tar archive (streamed to STDOUT by default) |
|---|---|
| 利用方法 | docker image save [OPTIONS] IMAGE [IMAGE...] |
| エイリアス | docker save |
内容説明
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.
オプション
| オプション | デフォルト | 内容説明 |
|---|---|---|
-o, --output | Write to a file, instead of STDOUT |
利用例
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