[pve-devel] [PATCH v2 qemu-server/manager/docs 0/3] fix #4140: Add option to disable QGA fs-freeze/-thaw on backup

Christoph Heiss c.heiss at proxmox.com
Thu Feb 23 15:18:02 CET 2023

TL;DR: On Windows guests, the QEMU guest agent calls into the VSS
(Volume Shadow Copy Service) subsystem, which has potential to mess up
applications which hook into this themselves like SQL Server, as
described in the bug report [0].

Building upon the proposal in that report, add an (default-enabled)
option to the QGA configuration to disable the behavior manually if
really needed. Due to its potential to wreak havoc, show the user a
warning when disabled.

[0] https://bugzilla.proxmox.com/show_bug.cgi?id=4140

v1: https://lists.proxmox.com/pipermail/pve-devel/2023-February/055656.html

Christoph Heiss (1):
      vzdump: Add VM QGA option to skip fs-freeze/-thaw on backup

 PVE/QemuServer.pm        | 8 +++++++-
 PVE/VZDump/QemuServer.pm | 6 ++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

Christoph Heiss (1):
      ui: qga: Add option to turn off QGA fs-freeze/-thaw on backup

 www/manager6/Utils.js                     |  2 ++
 www/manager6/form/AgentFeatureSelector.js | 31 ++++++++++++++++++++++++++++++-
 2 files changed, 32 insertions(+), 1 deletion(-)

Christoph Heiss (1):
      qm: Add section explaining fs-freeze/-thaw QGA option

 qm.adoc | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)


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