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I've been learning docker and decided to try out the unionfs aufs. But I couldn't find a way to do it.

I tried mount -t aufs but it complained that aufs was unknown.

$ sudo mount -t aufs -o dirs=./container-layer:./image-layer4:./image-layer3:./image-layer2:./image-layer1 none ./mnt
mount: unknown filesystem type 'aufs'

I've searched the Internet but still can't figure out a way to mount aufs filesystem. I'd appriciate it if someone can tell how to mount aufs filesystem or just redirect me to some links.

OS: Ubuntu16.04

uname -a:

Linux myzone 4.14.13-041413-generic #201801101001 SMP Wed Jan 10 10:02:53 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

By the way, no aufs in /proc/filesystem and aufs-tools was installed.

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    Use overlayfs, it provides the same functionality Commented Oct 22, 2018 at 13:31

2 Answers 2

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From what you described, you need to rebuild your kernel so it includes aufs either as a builtin filesystem or as a module.

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Current best practice is to use OverlayFS instead of AUFS. Ideally overlay2 rather than overlay.

OverlayFS is a modern union filesystem that is similar to AUFS, but faster and with a simpler implementation.

See https://docs.docker.com/storage/storagedriver/overlayfs-driver/ for details.

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