Proxmox – Could not login to web interface and read only directory /etc/pve
May 29 02:06:55 pve1 pvestatd[1931]: authkey rotation error: cfs-lock 'authkey' error: got lock request timeout
May 29 02:06:55 pve1 pvestatd[1931]: status update time (9.120 seconds)
May 29 02:06:56 pve1 pve-ha-lrm[2050]: unable to write lrm status file - unable to delete old temp file: Input/output error
Fix the cluster filesystem:
# systemctl stop pve-cluster
# rm -f /var/lib/pve-cluster/.pmxcfs.lockfile
# systemctl start pve-cluster