A domain controller performs two critical functions; it is usually a DNS server and it manages to domain resources. The first thing that happens in a failover is that the running domain controller is shut down, causing these function to become unavailable.
1. If you have multiple domain controllers, there should be another DNS server available, but the failover to another DNS server may not take place quickly enough for the DC failover to continue. This can be resolved by a couple methods.
a. Use host files on the vRanger server and VAs so that the vCenter server and the hosts can be located.
b. Install a secondary DNS server on the vRanger or vCenter server. Point the VAs, the vRanger server, and the vCenter server to the secondary DNS server as their primary DNS servers.
2. Instead of using a domain account for vRanger to authentication to the vCenter server, create a local account on the vCenter server with the necessary rights. Then configure vRanger to connect to the vCenter server using this local account. A domain controller will no longer be required for authentication.
