Virtualized Proxmox Backup Server QEMU agent install
I'm virtualizing PBS on a TrueNAS 25.10.2.1 server and it seems to be working fine other than a worrying console message in the PBS VM:
"clocksource: timekeeping watchdog on CPU3: Marking clocksource 'tsc' as unstable because the skew is too large:"
After doing a bit of investigating, it appears this is likely due to using a QEMU VM without the guest agent installed. I installed it without any errors but when I tried to enable it using systemctl, it threw a new error which is well outside my domain knowledge. Any ideas?
root@pbs4b:~# systemctl enable qemu-guest-agent
Synchronizing state of qemu-guest-agent.service with SysV service script with /usr/lib/systemd/systemd-sysv-install.
Executing: /usr/lib/systemd/systemd-sysv-install enable qemu-guest-agent
The unit files have no installation config (WantedBy=, RequiredBy=, UpheldBy=,
Also=, or Alias= settings in the [Install] section, and DefaultInstance= for template units). This means they are not meant to be enabled or disabled using systemctl.
Possible reasons for having these kinds of units are:
• A unit may be statically enabled by being symlinked from another unit's .wants/, .requires/, or .upholds/ directory.
• A unit's purpose may be to act as a helper for some other unit which has a requirement dependency on it.
• A unit may be started when needed via activation (socket, path, timer, D-Bus, udev, scripted systemctl call, ...).
• In case of template units, the unit is meant to be enabled with some instance name specified.