Public bug reported:
I'm not sure exactly what got me into this state, but I have several lxc
containers that cannot be deleted.
$ lxc info
<snip>
api_status: stable
api_version: "1.0"
auth: trusted
public: false
auth_methods:
- tls
environment:
addresses: []
architectures:
- x86_64
- i686
certificate: |
-----BEGIN CERTIFICATE-----
<snip>
-----END CERTIFICATE-----
certificate_fingerprint:
3af6f8b8233c5d9e898590a9486ded5c0bec045488384f30ea921afce51f75cb
driver: lxc
driver_version: 3.0.1
kernel: Linux
kernel_architecture: x86_64
kernel_version: 4.15.0-23-generic
server: lxd
server_pid: 15123
server_version: "3.2"
storage: zfs
storage_version: 0.7.5-1ubuntu15
server_clustered: false
server_name: milhouse
$ lxc delete --force b1
Error: Failed to destroy ZFS filesystem: cannot destroy
'default/containers/b1': dataset is busy
Talking in #lxc-dev, stgraber and sforeshee provided diagnosis:
| short version is that something unshared a mount namespace causing
| them to get a copy of the mount table at the time that dataset was
| mounted, which then prevents zfs from being able to destroy it)
The work around provided was
| you can unstick this particular issue by doing:
| grep default/containers/b1 /proc/*/mountinfo
| then for any of the hits, do:
| nsenter -t PID -m -- umount
/var/snap/lxd/common/lxd/storage-pools/default/containers/b1
| then try the delete again
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: linux-image-4.15.0-23-generic 4.15.0-23.25
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.10-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: smoser 31412 F.... pulseaudio
/dev/snd/controlC2: smoser 31412 F.... pulseaudio
/dev/snd/controlC0: smoser 31412 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Thu Jun 28 10:42:45 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-07-23 (1071 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
MachineType:
b'\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff'
b'\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff'
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-23-generic
root=UUID=f897b32a-eacf-4191-9717-844918947069 ro quiet splash vt.handoff=1
RelatedPackageVersions:
linux-restricted-modules-4.15.0-23-generic N/A
linux-backports-modules-4.15.0-23-generic N/A
linux-firmware 1.174
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Intel Corporation
dmi.bios.version: RYBDWi35.86A.0246.2015.0309.1355
dmi.board.asset.tag: ���������������������������������
dmi.board.name: NUC5i5RYB
dmi.board.vendor: Intel Corporation
dmi.board.version: H40999-503
dmi.chassis.asset.tag: ���������������������������������
dmi.chassis.type: 3
dmi.chassis.vendor: ���������������������������������
dmi.chassis.version: ���������������������������������
dmi.modalias:
dmi:bvnIntelCorporation:bvrRYBDWi35.86A.0246.2015.0309.1355:bd03/09/2015:svn:pn:pvr:rvnIntelCorporation:rnNUC5i5RYB:rvrH40999-503:cvn:ct3:cvr:
dmi.product.family: ���������������������������������
dmi.product.name: ���������������������������������
dmi.product.version: ���������������������������������
dmi.sys.vendor: ���������������������������������
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug cosmic
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https://bugs.launchpad.net/bugs/1779156
Title:
lxc 'delete' fails to destroy ZFS filesystem 'dataset is busy'
Status in linux package in Ubuntu:
Confirmed
Bug description:
I'm not sure exactly what got me into this state, but I have several
lxc containers that cannot be deleted.
$ lxc info
<snip>
api_status: stable
api_version: "1.0"
auth: trusted
public: false
auth_methods:
- tls
environment:
addresses: []
architectures:
- x86_64
- i686
certificate: |
-----BEGIN CERTIFICATE-----
<snip>
-----END CERTIFICATE-----
certificate_fingerprint:
3af6f8b8233c5d9e898590a9486ded5c0bec045488384f30ea921afce51f75cb
driver: lxc
driver_version: 3.0.1
kernel: Linux
kernel_architecture: x86_64
kernel_version: 4.15.0-23-generic
server: lxd
server_pid: 15123
server_version: "3.2"
storage: zfs
storage_version: 0.7.5-1ubuntu15
server_clustered: false
server_name: milhouse
$ lxc delete --force b1
Error: Failed to destroy ZFS filesystem: cannot destroy
'default/containers/b1': dataset is busy
Talking in #lxc-dev, stgraber and sforeshee provided diagnosis:
| short version is that something unshared a mount namespace causing
| them to get a copy of the mount table at the time that dataset was
| mounted, which then prevents zfs from being able to destroy it)
The work around provided was
| you can unstick this particular issue by doing:
| grep default/containers/b1 /proc/*/mountinfo
| then for any of the hits, do:
| nsenter -t PID -m -- umount
/var/snap/lxd/common/lxd/storage-pools/default/containers/b1
| then try the delete again
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: linux-image-4.15.0-23-generic 4.15.0-23.25
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.10-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: smoser 31412 F.... pulseaudio
/dev/snd/controlC2: smoser 31412 F.... pulseaudio
/dev/snd/controlC0: smoser 31412 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Thu Jun 28 10:42:45 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-07-23 (1071 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
MachineType:
b'\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff'
b'\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff'
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-23-generic
root=UUID=f897b32a-eacf-4191-9717-844918947069 ro quiet splash vt.handoff=1
RelatedPackageVersions:
linux-restricted-modules-4.15.0-23-generic N/A
linux-backports-modules-4.15.0-23-generic N/A
linux-firmware 1.174
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/09/2015
dmi.bios.vendor: Intel Corporation
dmi.bios.version: RYBDWi35.86A.0246.2015.0309.1355
dmi.board.asset.tag: ���������������������������������
dmi.board.name: NUC5i5RYB
dmi.board.vendor: Intel Corporation
dmi.board.version: H40999-503
dmi.chassis.asset.tag: ���������������������������������
dmi.chassis.type: 3
dmi.chassis.vendor: ���������������������������������
dmi.chassis.version: ���������������������������������
dmi.modalias:
dmi:bvnIntelCorporation:bvrRYBDWi35.86A.0246.2015.0309.1355:bd03/09/2015:svn:pn:pvr:rvnIntelCorporation:rnNUC5i5RYB:rvrH40999-503:cvn:ct3:cvr:
dmi.product.family: ���������������������������������
dmi.product.name: ���������������������������������
dmi.product.version: ���������������������������������
dmi.sys.vendor: ���������������������������������
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