Bug 50435 – Undocumentes legacy code for uvmm/kvm/qemu/dynamic_ownership,user,group breaks VM start

Bug 50435 - Undocumentes legacy code for uvmm/kvm/qemu/dynamic_ownership,user,group breaks VM start


Summary:	Undocumentes legacy code for uvmm/kvm/qemu/dynamic_ownership,user,group break...

Status:	CLOSED WONTFIX

Product:	UCS
Classification:	Unclassified
Component:	Virtualization - KVM
Version:	UCS 4.4
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	---
Assigned To:	UCS maintainers
QA Contact:	UCS maintainers

URL:
Keywords:

Depends on:	30949
Blocks:
	Show dependency tree / graph

Reported:	2019-10-30 11:01 CET by Philipp Hahn
Modified:	2023-06-28 10:46 CEST (History)
CC List:	0 users

See Also:
What kind of report is it?:	Bug Report
What type of bug is this?:	5: Major Usability: Impairs usability in key scenarios
Who will be affected by this bug?:	2: Will only affect a few installed domains
How will those affected feel about the bug?:	2: A Pain – users won’t like this once they notice it
User Pain:	0.114
Enterprise Customer affected?:
School Customer affected?:
ISV affected?:
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Bug group (optional):	Cleanup
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Description Philipp Hahn

2019-10-30 11:01:40 CET

> univention-virtual-machine-manager-node (2.0.3-6) unstable; urgency=low
> 
>   * Update/review UCR variable descriptions (Bug #30949)
>     Remove UCR variable descriptions for uvmm/kvm/qemu/user, uvmm/kvm/qemu/group
>     and uvmm/kvm/qemu/dynamic_ownership. This is a legacy feature no longer relevant.
> 
>  -- Moritz Mühlenhoff <muehlenhoff@univention.de>  Tue, 10 Sep 2013 15:38:24 +0200

removed the documentation, but the code still remains in univention-virtual-machine-manager-node/conffiles/etc/libvirt/qemu.conf and breaks starting a VM with a volume created manually via
  vol-create-as --pool default --name $NAME.qcow2 --capacity 1G --format qcow2

The code should be removed (or at leas be documented again).

(This breaks starting a VM as the Volume is created 0600 owned by root, but Qemu runs as "libvirt-qemu:libvirt-qemu" and cannot access the file. With "dynamic ownership" libvirtd running as "root" changes the permissions of the volumes while the VM is running, which is upstreams default.)

Comment 1 Philipp Hahn

2023-06-28 10:44:06 CEST

UVMM and virtualization with UCS is deprecated and will no longer be developed in UCS 4.4; they have already been removed from UCS 5.0.