VMware Cloud Community
RizzySizzy
Contributor
Contributor
Jump to solution

Updating DNS on ESXi 5.1 hosts

I have a cluster with 8 hosts where 6 have DNS and NTP settings from a legacy domain and 2 have current settings.  The legacy domain controllers are still up and there is a trust between the two.  I would like to change the hosts so they are all using the current DNS and NTP servers.  The directory services for all the hosts is set to Local Authentication so they are not integrated with AD.  What is the impact of changing these settings?  What would be the steps to follow?  Is it as easy as putting the hosts with legacy settings in maintenance mode, making the change, then bringing them back from maintenance mode?   

Tags (1)
Reply
0 Kudos
1 Solution

Accepted Solutions
RizzySizzy
Contributor
Contributor
Jump to solution

The steps I ended up taking were:

- added A records in DNS

- put host in maintenance mode (always do this before making any changes)

- remove from vCenter

- connect directly to host and make changes

- add host to vCenter

Everything is up and no issues.

View solution in original post

Reply
0 Kudos
5 Replies
a_p_
Leadership
Leadership
Jump to solution

I don't see a reason for doing this in Maintenance Mode. Just make sure the required DNS Host-A entries exist on the new DNS server, and then change the settings on the hosts.

André

Reply
0 Kudos
RizzySizzy
Contributor
Contributor
Jump to solution

What about changing the domain?  Does it matter since they are not integrated with AD?

Reply
0 Kudos
SavkoorSuhas
Expert
Expert
Jump to solution

No, there is no downtime required.

If you found this or any other answer useful please consider the use of the Helpful or Correct buttons to award points.

Don't Backup. Go Forward!
Rubrik

Reply
0 Kudos
RizzySizzy
Contributor
Contributor
Jump to solution

The steps I ended up taking were:

- added A records in DNS

- put host in maintenance mode (always do this before making any changes)

- remove from vCenter

- connect directly to host and make changes

- add host to vCenter

Everything is up and no issues.

Reply
0 Kudos
VijaySendhur
Enthusiast
Enthusiast
Jump to solution

Yes, Downtime not required

Reply
0 Kudos