Bug status updated accordingly. I set the linux task to Invalid as the
kernel was not involved after all. Thanks again Stéphane and Colin!
** Changed in: lxc (Ubuntu)
Status: Confirmed => Fix Released
** Changed in: lxc (Ubuntu Cosmic)
Status: Confirmed => Fix Released
** Changed i
best. fix. ever.
working after a reboot.
$ snap list lxd
Name Version RevTracking Publisher Notes
lxd 3.18 12211 stablecanonical✓ -
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The current stable snap seems to fully address the issue. See:
https://github.com/lxc/lxd/issues/4656#issuecomment-542886330
and following.
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The released fix does not appear to fully address the problem:
https://github.com/lxc/lxd/issues/4656#issuecomment-542630903
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A fix has landed in lxd, I refer you to the following comment:
https://github.com/lxc/lxd/issues/4656#issuecomment-541266681
Please check if this addresses the issues.
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See: https://github.com/lxc/lxd/issues/4656#issuecomment-535531229
In https://github.com/lxc/lxd/blob/master/lxd/storage_zfs_utils.go#L255
the umount is done by
err := unix.Unmount(mountpoint, unix.MNT_DETACH)
The umount2(2) manpage writes about MNT_DETACH:
Perform a lazy unmount: make
Been digging into this a bit further with lxc 3.17 on Eoan.
lxc launch ubuntu:bionic zfs-bug-test
Creating zfs-bug-test
Starting zfs-bug-test
lxc delete zfs-bug-test --force
Error: Failed to destroy ZFS filesystem: Failed to run: zfs destroy -r
default/containers/z1: cannot destroy 'default/conta
The ZFS destroy checks the reference count on the dataset with
zfs_refcount_count(&ds->ds_longholds) != expected_holds and returns
EBUSY in dsl_destroy_head_check_impl.
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Reproducer is as follows:
lxc launch ubuntu:bionic zfs-bug-test
Creating zfs-bug-test
Starting zfs-bug-test
lxc delete zfs-bug-test --force
Error: Failed to destroy ZFS filesystem:
Can reproduce this on Eoan with latest 5.2, 5.3 kernel.
** Also affects: linux (Ubuntu Eoan)
Importance: Medium
To be clear: point(3) above is what I see happening most of the time at
the moment.
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Title:
lxc 'delete' fails to destroy
Hi,
I hit this issue on Bionic, Disco and Eoan. Our (server-team) Jenkins
nodes are often filled by stale LXD containers which are left there
because of "fails to destroy ZFS filesystem" errors.
Some thoughts and qualitative observations:
0. This is not a corner case, I see the problem all the t
Do we have any hunches on how to reproduce this issue?
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Title:
lxc 'delete' fails to destroy ZFS filesystem 'dataset is b
Cosmic is now end-of-life. Does this still occur on Disco?
** Changed in: linux (Ubuntu)
Importance: High => Medium
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Colin Ian King (colin-king)
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** Tags added: cscc
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Title:
lxc 'delete' fails to destroy ZFS filesystem 'dataset is busy'
Status in linux package in Ub
https://github.com/lxc/lxd/issues/4656
** Bug watch added: LXD bug tracker #4656
https://github.com/lxc/lxd/issues/4656
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This is still around. Scott wrote up a script to handle cleaning this
up.
https://gist.github.com/smoser/2c78cf54a1e22b6f05270bd3fead8a5c
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: lxc (Ubuntu)
Status: New => Confirmed
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: lxc (Ubuntu Cosmic)
Status: New => Confirmed
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** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Changed in: linux (Ubuntu)
Status: Confirmed => Triaged
** Also affects: linux (Ubuntu Cosmic)
Importance: High
Status: Triaged
** Tags added: kernel-da-key
** Also affects: lxc (Ubuntu)
Importance: Undecided
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