For remote physical system, commands like shutdown, poweroff, halt, etc., will make the systems unreachable, and reboot system might able to recover them.
shutdown -r nowrebootinit 6systemctl start reboot.targetAfter reboot PVE, following error occurred.
# systemctl status pve-cluster
...
Jun 26 09:33:26 pve01 pmxcfs[3506]: [quorum] crit: quorum_initialize failed: 2
Jun 26 09:33:26 pve01 pmxcfs[3506]: [quorum] crit: can't initialize service
Jun 26 09:33:26 pve01 pmxcfs[3506]: [confdb] crit: cmap_initialize failed: 2
Jun 26 09:33:26 pve01 pmxcfs[3506]: [confdb] crit: can't initialize service
Jun 26 09:33:26 pve01 pmxcfs[3506]: [dcdb] crit: cpg_initialize failed: 2
Jun 26 09:33:26 pve01 pmxcfs[3506]: [dcdb] crit: can't initialize service
Jun 26 09:33:26 pve01 pmxcfs[3506]: [status] crit: cpg_initialize failed: 2
Jun 26 09:33:26 pve01 pmxcfs[3506]: [status] crit: can't initialize service
...
# journalctl -u corosync.service
...
Jun 26 09:26:17 pve01 corosync[1826]: [MAIN ] failed to parse node address 'pve01.xx.xx'
Jun 26 09:26:17 pve01 corosync[1826]: [MAIN ] Corosync Cluster Engine exiting with status 8 at main.c:1417.
Jun 26 09:26:17 pve01 systemd[1]: corosync.service: Main process exited, code=exited, status=8/n/a
Jun 26 09:26:17 pve01 systemd[1]: corosync.service: Failed with result 'exit-code'.
Jun 26 09:26:17 pve01 systemd[1]: Failed to start Corosync Cluster Engine.
...Change ring0_addr pve01.xx.xx of node in pve01 corosync.conf to IP address.
This morning, I saw the login screen of my TrueNAS, so decided to have a look. After login, the TrueNAS rebooted...
This is really a design issue, both shutdown and reboot are not well designed, the URL can be reused without any warning prompt.
In fact, I knew this issue, but only careful enough just after reboot or shutdown performed. After yesterday's reboot, I didn't try to login using UI URL.
Although I careful enough, this issue leads me avoid using Back button of browser, because the URL can be in history.
The solution can be very easy, just change GET method to POST method in both reboot and shutdown pages with addition variable. But when will they make such change as it is already a mature product for years.