Hi Crhis,
I didn't resolve properly, I found that downgrading libvirt was the
fastest workaround.
Just downgrade libvirt via yum/dnf to to version 7.10. I added the
downgrade in an Ansible task, if you are practical:
- name: Ensure libvirt-7.10.0 is installed
yum:
name: libvirt-7.10.0
state: present
update_cache: true
allow_downgrade: true
ignore_errors: true
or via cli :
yum install libvirt-7.10.0
Post dowgrade we performed a restart of vdsm (or super-vdsm, or both, I
don't remember). The downgrade is quite safe, we didn't encounter any
problem with existing hosts and new deployed one.
Francesco
Il 14/03/2022 15:58, Christopher Law ha scritto:
Hi -
Did anyone get a solution to this. I just upgraded our physical ovirt-engine to
4.4.10 and added a freshly installed oVirt Node 4.4.10, and I'm getting this
issue.
Given libvirt8 is part of oVirt Node 4.4.10 base install I was hoping for a
fix. Also seen a fix applied
here:https://github.com/oVirt/ovirt-engine/commit/a1e7e39348550b575f1f01b701105f9e1066b09f
but not sure if this has been released?
What are my options, not quite sure how to downgrade libvirt in oVirt Node. I
was planning on trying to install 4.4.9, but not sure if the ansible scripts
will update it automatically when adding it to the cluster.
Francesco - Did you get this resolved?
Cheers,
Chris.
-----Original Message-----
From: Milan Zamazal<[email protected]>
Sent: 14 February 2022 18:04
To: Francesco Lorenzini<[email protected]>
Cc: francesco--- via Users<[email protected]>
Subject: [ovirt-users] Re: Console - VNC password is 12 characters long, only 8
permitted
Francesco Lorenzini<[email protected]> writes:
Hi Milan,
thank you for your answer.
So there is no other way/workaround? We must wait the fix in the
engine and then upgrade? Maybe a downgrade of libvirt(?).
I can't think about any other workaround, without modifying sources, than
downgrading libvirt, until the fixed Engine is installed.
I was looking up some config file in the host under /etc/libvirt and
found the parameters vnc_password in qemu.conf file. I'm not sure that
setting a password per host in this config file works, casue it is
still passed via xml...
In theory, you could set the default password there and remove passwords from
the domain XMLs using Vdsm hooks. You would have to do it on all the hosts or
handle migrations accordingly. Downgrading libvirt looks much easier.
The default VNC password. Only 8 bytes are significant for # VNC
passwords. This parameter is only used if the per-domain # XML config
does not already provide a password.
Francesco
Il 14/02/2022 12:41, Milan Zamazal ha scritto:
francesco--- via Users<[email protected]> writes:
Hi all,
I'm using websockify + noVNC for expose the vm console via browser getting the
graphicsconsoles ticket via API. Everything works fine for every other host
that I have (more than 200), the console works either via oVirt engine and via
browser) but just for a single host (CentOS Stream release 8, oVirt 4.4.9) the
console works only via engine but when I try the connection via browser I get
the following error (vdsm log of the host):
ERROR FINISH updateDevice error=unsupported configuration: VNC password is
12 characters long, only 8 permitted
Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/vdsm/common/api.py", line 124, in
method
ret = func(*args, **kwargs)
File "/usr/lib/python3.6/site-packages/vdsm/API.py", line 372, in
updateDevice
return self.vm.updateDevice(params)
File "/usr/lib/python3.6/site-packages/vdsm/virt/vm.py", line 3389, in
updateDevice
return self._updateGraphicsDevice(params)
File "/usr/lib/python3.6/site-packages/vdsm/virt/vm.py", line 3365, in
_updateGraphicsDevice
params['params']
File "/usr/lib/python3.6/site-packages/vdsm/virt/vm.py", line 5169, in
_setTicketForGraphicDev
self._dom.updateDeviceFlags(xmlutils.tostring(graphics), 0)
File "/usr/lib/python3.6/site-packages/vdsm/virt/virdomain.py", line 101,
in f
ret = attr(*args, **kwargs)
File "/usr/lib/python3.6/site-packages/vdsm/common/libvirtconnection.py",
line 131, in wrapper
ret = f(*args, **kwargs)
File "/usr/lib/python3.6/site-packages/vdsm/common/function.py", line 94,
in wrapper
return func(inst, *args, **kwargs)
File "/usr/lib64/python3.6/site-packages/libvirt.py", line 3244, in
updateDeviceFlags
raise libvirtError('virDomainUpdateDeviceFlags() failed')
libvirt.libvirtError: unsupported configuration: VNC password is
12 characters long, only 8 permitted
The error is pretty much self explanatory but, I can't manage to
figure out why only on this server
Hi,
this happens with libvirt 8.0.
and I wonder if I can set the length of the generated vnc password
somewhere.
I don't think so, it must be fixed in Engine. See
https://github.com/oVirt/ovirt-engine/commit/a1e7e39348550b575f1f01b7
01105f9e1066b09f
for more details.
Regards,
Milan
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