SRU Justification
Impact: The KVP daemon fails to start on first boot due to being started before the hv_kvp device appears.
Fix: Update the hv-kvp-daemon service file to start the daemon after device node appears.
Regression Potential: The changes are only to the hv-kvp-daemon service file and adding a udev rule, so the worst case regression would be that the service does not start. In testing the service did start as expected.
Test Case: See comment #15.
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Launching a recent daily image of disco on azure results in a VM in which the hv-kvp-daemon.service fails to start:
$ systemctl status -o cat hv-kvp-daemon.service
● hv-kvp-daemon.service - Hyper-V KVP Protocol Daemon
Loaded: loaded (/lib/systemd/system/hv-kvp-daemon.service; enabled; vendor pr
Active: failed (Result: exit-code) since Thu 2019-03-14 13:07:15 UTC; 11min a
Main PID: 219 (code=exited, status=1/FAILURE)
Started Hyper-V KVP Protocol Daemon.
KVP starting; pid is:219
open /dev/vmbus/hv_kvp failed; error: 2 No such file or directory
hv-kvp-daemon.service: Main process exited, code=exited, status=1/FAILURE
hv-kvp-daemon.service: Failed with result 'exit-code'.
The instance was created with:
$ az vm create --resource-group [redacted] --image Canonical:UbuntuServer:19.04-DAILY:19.04.201903130 --size Standard_D2_v2 --name disco-0313
As best as I can tell, the /dev/vmbus/hv_kvp isn't available when the hv-kvp-daemon.service starts, but it is available a few seconds later. Manually starting the daemon once I can ssh in works.
---
ProblemType: Bug
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.10-0ubuntu23
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
CRDA: N/A
DistroRelease: Ubuntu 19.04
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
Lsusb: Error: command ['lsusb'] failed with exit code 1:
MachineType: Microsoft Corporation Virtual Machine
Package: linux (not installed)
PciMultimedia:
ProcEnviron:
TERM=screen-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C.UTF-8
SHELL=/bin/bash
ProcFB: 0 hyperv_fb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-1011-azure root=PARTUUID=11894199-2ca2-4912-9c41-d28128744d57 ro console=tty1 console=ttyS0 panic=-1
ProcVersionSignature: User Name 4.18.0-1011.11-azure 4.18.20
RelatedPackageVersions:
linux-restricted-modules-4.18.0-1011-azure N/A
linux-backports-modules-4.18.0-1011-azure N/A
linux-firmware N/A
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
Tags: disco uec-images
Uname: Linux 4.18.0-1011-azure x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm audio cdrom dialout dip floppy netdev plugdev sudo video
_MarkForUpload: True
dmi.bios.date: 06/02/2017
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 090007
dmi.board.name: Virtual Machine
dmi.board.vendor: Microsoft Corporation
dmi.board.version: 7.0
dmi.chassis.asset.tag: 7783-7084-3265-9085-8269-3286-77
dmi.chassis.type: 3
dmi.chassis.vendor: Microsoft Corporation
dmi.chassis.version: 7.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr090007:bd06/02/2017:svnMicrosoftCorporation:pnVirtualMachine:pvr7.0:rvnMicrosoftCorporation:rnVirtualMachine:rvr7.0:cvnMicrosoftCorporation:ct3:cvr7.0:
dmi.product.name: Virtual Machine
dmi.product.uuid: 3b0f2160-7fc4-a646-904c-4248f04792d4
dmi.product.version: 7.0
dmi.sys.vendor: Microsoft Corporation
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1820063
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.