Public bug reported:
After upgrading the following QEMU packages to latest Bionic version
(1:2.11+dfsg-1ubuntu7.20) :
- qemu-system-x86
- qemu-system-common
- qemu-utils
- qemu-block-extra:amd64
Attaching an RBD device to a VM that was running prior to the upgrade
fails with
"Unknown protocol 'rbd'
This only happens if this is the first RBD device to be attached after
the upgrade. Attaching a device, then upgrading to 1:2.11+dfsg-
1ubuntu7.20 will not generate the error message and the device will
attach correctly.
Attaching a device to a new VM created _AFTER_ the upgrade does not
trigger the problem either.
Downgrading qemu-block-extra:amd64 after the upgrade and prior to first
attaching an RBD device will also not trigger the error.
Here are two examples :
Using :
ii qemu-block-extra:amd64 1:2.11+dfsg-1ubuntu7
ii qemu-system-common 1:2.11+dfsg-1ubuntu7
ii qemu-system-x86 1:2.11+dfsg-1ubuntu7
ii qemu-utils 1:2.11+dfsg-1ubuntu7
./qmp-shell -H /opt/vms/1/qmp.sock
(QEMU) drive_add auto
format=raw,cache=writeback,file=rbd:rbd/disk-086264fd-9ca4-42a9-9deb-4a8be80f2bab:rbd_cache=true:id=compute-hv:conf=/etc/ceph/ceph.conf:keyring=/etc/ceph/ceph.client.compute-hv.keyring,id=volume-8b84f816-6e11-4a17-a2ce-0cdb6f486bfe,throttling.iops-total=10000,if=none
OK
With :
ii qemu-block-extra:amd64 1:2.11+dfsg-1ubuntu7
ii qemu-system-common 1:2.11+dfsg-1ubuntu7
ii qemu-system-x86 1:2.11+dfsg-1ubuntu7
ii qemu-utils 1:2.11+dfsg-1ubuntu7
and an existing QEMU process running
$ apt udpate && apt -y install qemu-utils qemu-system-x86 qemu-system-common
qemu-block-extra:amd64
Using :
ii qemu-block-extra:amd64 1:2.11+dfsg-1ubuntu7.20
ii qemu-system-common 1:2.11+dfsg-1ubuntu7.20
ii qemu-system-x86 1:2.11+dfsg-1ubuntu7.20
ii qemu-utils 1:2.11+dfsg-1ubuntu7.20
./qmp-shell -H /opt/vms/1/qmp.sock
(QEMU) drive_add auto
format=raw,cache=writeback,file=rbd:rbd/disk-086264fd-9ca4-42a9-9deb-4a8be80f2bab:rbd_cache=true:id=compute-hv:conf=/etc/ceph/ceph.conf:keyring=/etc/ceph/ceph.client.compute-hv.keyring,id=volume-8b84f816-6e11-4a17-a2ce-0cdb6f486bfe,throttling.iops-total=10000,if=none
Unknown protocol 'rbd'
(QEMU)
Restarting the QEMU process fixes the issue.
** Affects: qemu (Ubuntu)
Importance: Undecided
Status: New
** Affects: qemu (Ubuntu Bionic)
Importance: Medium
Status: Confirmed
** Also affects: qemu (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: qemu (Ubuntu Bionic)
Status: New => Confirmed
** Changed in: qemu (Ubuntu Bionic)
Importance: Undecided => Medium
** Description changed:
After upgrading the following QEMU packages to latest Bionic version
(1:2.11+dfsg-1ubuntu7.20) :
- qemu-system-x86
- qemu-system-common
- qemu-utils
- qemu-block-extra:amd64
Attaching an RBD device to a VM that was running prior to the upgrade
fails with
"Unknown protocol 'rbd'
This only happens if this is the first RBD device to be attached after
the upgrade. Attaching a device, then upgrading to 1:2.11+dfsg-
1ubuntu7.20 will not generate the error message and the device will
attach correctly.
Attaching a device to a new VM created _AFTER_ the upgrade does not
trigger the problem either.
Downgrading qemu-block-extra:amd64 after the upgrade and prior to first
attaching an RBD device will also not trigger the error.
Here are two examples :
Using :
ii qemu-block-extra:amd64 1:2.11+dfsg-1ubuntu7
ii qemu-system-common 1:2.11+dfsg-1ubuntu7
ii qemu-system-x86 1:2.11+dfsg-1ubuntu7
ii qemu-utils 1:2.11+dfsg-1ubuntu7
./qmp-shell -H /opt/vms/1/qmp.sock
(QEMU) drive_add auto
format=raw,cache=writeback,file=rbd:rbd/disk-086264fd-9ca4-42a9-9deb-4a8be80f2bab:rbd_cache=true:id=compute-hv:conf=/etc/ceph/ceph.conf:keyring=/etc/ceph/ceph.client.compute-hv.keyring,id=volume-8b84f816-6e11-4a17-a2ce-0cdb6f486bfe,throttling.iops-total=10000,if=none
OK
-
With :
ii qemu-block-extra:amd64 1:2.11+dfsg-1ubuntu7
ii qemu-system-common 1:2.11+dfsg-1ubuntu7
ii qemu-system-x86 1:2.11+dfsg-1ubuntu7
ii qemu-utils 1:2.11+dfsg-1ubuntu7
and an existing QEMU process running
$ apt udpate && apt -y install qemu-utils qemu-system-x86 qemu-system-common
qemu-block-extra:amd64
Using :
ii qemu-block-extra:amd64 1:2.11+dfsg-1ubuntu7.20
ii qemu-system-common 1:2.11+dfsg-1ubuntu7.20
ii qemu-system-x86 1:2.11+dfsg-1ubuntu7.20
ii qemu-utils 1:2.11+dfsg-1ubuntu7.20
./qmp-shell -H /opt/vms/1/qmp.sock
(QEMU) drive_add auto
format=raw,cache=writeback,file=rbd:rbd/disk-086264fd-9ca4-42a9-9deb-4a8be80f2bab:rbd_cache=true:id=compute-hv:conf=/etc/ceph/ceph.conf:keyring=/etc/ceph/ceph.client.compute-hv.keyring,id=volume-8b84f816-6e11-4a17-a2ce-0cdb6f486bfe,throttling.iops-total=10000,if=none
Unknown protocol 'rbd'
(QEMU)
+
+ Restarting the QEMU process fixes the issue.
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https://bugs.launchpad.net/bugs/1852766
Title:
Attaching RBD device after qemu upgrade fails with "Unknown protocol
'rbd'"
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