bootstrapping the local node is compromised due to the existing 2-node cluster configuration

[zzhou1]

Just as the subject. Here is the reproducer as below.

adm@tws-corosync3-1:~> sudo -E crm cluster init --use-ssh-agent -ys /dev/disk/by-partlabel/sbd-tws-c3 -N adm@tws-corosync3-2
adm@tws-corosync3-1:~> sudo -E crm cluster disable --all
adm@tws-corosync3-1:~> sudo -E crm cluster stop --all
adm@tws-corosync3-1:~> sudo -E crm cluster init --use-ssh-agent -ys /dev/disk/by-partlabel/sbd-tws-c3
...
ERROR: cluster.init: Failed to run command systemctl is-enabled 'sbd.service' on root@tws-corosync3-2: root@tws-corosync3-2: Permission denied (publickey,password,keyboard-interactive). Please configure passwordless authentication with "crm cluster init ssh" and "crm cluster join ssh"