On Thu, Oct 29, 2020 at 11:34:09PM +0100, Natxo Asenjo wrote:
On Thu, Oct 29, 2020 at 8:39 PM Michal Privoznik <mprivozn@redhat.com> wrote:
On 10/29/20 4:47 PM, Natxo Asenjo wrote:
ah, yes. I try this:
$ virsh -c qemu:///system
But it then I get a prompt:
==== AUTHENTICATING FOR org.libvirt.unix.manage ============= System policy prevents management of local virtualized systems Authenticating as: sudo_user_not_disclosed Password: Password: polikit-agent-helper-1: pam_authenticate failed: Authentication failure
Our allowed groups in the /etc/dbus-1/system.d/org.libvirt.conf are no sudo users (this can change, but not as of now). It is a bit strange that the get the password prompt for a local sudo user we have in place for as systems have no working sssd connection to the idm realm (break glass user)
My user can use the system bus in cockpit without a password.
The dbus policy looks like this:
<policy group="groupname"> < allow send_destination="org.libvirt"/> </policy> <policy group="other_groupname"> < allow send_destination="org.libvirt"/> </policy>
This is expected. qemu:///system uses an unix socket to talk to libvirtd and not dbus. I don't know what credentials does cockpit set there. But I'm not sure it's safe to go behind cockpit's back and talk to libvirt directly. If you'd change a configuration of a VM it may not be reflected in cockpit.
It is safe to do everything to the system what cockpit does as cockpit is stateless and can users can jump between terminal and the cockpit UI.
to be honest, I found about the dbus system connection policies in the cockpit documentation, the have a link to the libvirt dbus snippet page:
https://cockpit-project.org/guide/latest/feature-virtualmachines
So is it not possible (taking cockpit out of the equation) to allow virsh to run as a normal user to connect to the local system connection?
It is possible to allow virsh to connect to system connection by default, you just need to create a new file: $HOME/.config/libvirt/libvirt.conf with this single line in it: uri_default="qemu:///system" for more details see [1]. Pavel [1] <https://libvirt.org/uri.html#URI_default>