Can not unmount an S3 directory mounted with s3fs-fuse

Question

I have an s3fs-fuse "device" mounted at /mnt/s3. I want to unmount it so that I can remount it with the mp_umask flag so that chroot will work properly.

The command should be:

fusermount -u /mnt/s3

Unfortunately the result is:

fusermount: failed to unmount /mnt/s3: Device or resource busy

That's not helpful. Shouldn't be this hard!

score 13 · Answer 1 · answered Jan 29 '19 at 19:35

13

The command that worked was:

umount -l /mnt/s3

answered Jan 29 '19 at 19:35

RubyRedGrapefruit

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This might not unmount the filesystem if one of the opens is long-lived; it is better to actually close the open files. – Andrew Gaul Feb 01 '19 at 18:32
1

In my case there were no open files, unmounting using that command did work for me. – Aftab Naveed Jun 04 '19 at 00:45

score 5 · Accepted Answer · answered Jan 29 '19 at 20:06

5

You can use lsof to figure out which files are still open.

answered Jan 29 '19 at 20:06

Andrew Gaul

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Can not unmount an S3 directory mounted with s3fs-fuse

2 Answers2