| 2019-11-15 16:10:36 |
Louis Bouchard |
description |
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) |
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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