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tar docker image (squash)
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| docker_root=/var/lib/docker/btrfs | |
| subvolumes=subvolumes | |
| docker_image=aputs/archlinux | |
| tar_file=/tmp/image.tar.gz | |
| # tar | |
| cd $docker_root/$subvolumes/$(docker inspect --format='{{.Id}}' $docker_image) | |
| tar --exclude={'.','..'} -Pcvzf $tar_file .* * |
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