Is the domain a prerequisite for Windows installation?

The best practice is to use a domain user as the cluster admin. It is the simplest way to maintain the cluster.

The local user can be supported as cluster admin, but some requirements must be meet:
  1. This same account with the same password must exist on every host in the cluster.

  2. This local user must belong to the Local Administrator's group on each host.

If the cluster admin is a local user, before running “egoconfig mghost”, you need to ensure the share directory gives “Full Control” permission to “Everyone”. And if you change the password and run “egosh ego execpasswd", you have to logon to the machine hosting the share directory, and then set the passwd.ego file permission to “Everyone” “Full Control”.