How to restart proxmox cluster services (also will reconnect to cluster)

If your node has been disconnected from your Proxmox Cluster (PVE Cluster). You may want to rejoin without rebooting.

Here are the commands you should execute (no pause needed in between command):

killall -9 corosync
systemctl restart pve-cluster
systemctl restart pvedaemon
systemctl restart pveproxy

systemctl restart pvestatd