Add a Proxmox Node to Cluster

When using UI Web interface to add node into cluster, the following error occurred

ERROR: TFA-enabled login currently works only with a TTY. at /usr/share/perl5/PVE/APIClient/LWP.pm line 100

Solution

Use command line below to add node via Shell

pvecm add <target ip> -link0 <source ip>

If got error on key validation, try node name instead

pvecm add <target_dns_name>