`console`: `(applet | html5 | vv)` :: Select the default Console viewer. You can either use the builtin java applet (VNC), an external virt-viewer comtatible application (SPICE), or an HTML5 based viewer (noVNC). `email_from`: `string` :: Specify email address to send notification from (default is root@$hostname) `fencing`: `(both | hardware | watchdog)` (default=`watchdog`):: Set the fencing mode of the HA cluster. Hardware mode needs a valid configuration of fence devices in /etc/pve/ha/fence.cfg. With both all two modes are used. + WARNING: 'hardware' and 'both' are EXPERIMENTAL & WIP `http_proxy`: `http://.*` :: Specify external http proxy which is used for downloads (example: 'http://username:password@host:port/') `keyboard`: `(da | de | de-ch | en-gb | en-us | es | fi | fr | fr-be | fr-ca | fr-ch | hu | is | it | ja | lt | mk | nl | no | pl | pt | pt-br | sl | sv | tr)` :: Default keybord layout for vnc server. `language`: `(de | en)` :: Default GUI language. `max_workers`: `integer (1 - N)` :: Defines how many workers (per node) are maximal started on actions like 'stopall VMs' or task from the ha-manager. `migration_unsecure`: `boolean` :: Migration is secure using SSH tunnel by default. For secure private networks you can disable it to speed up migration.