FQDNs for ESX environment when DNS servers are VMS within the ESX environment

Hello

I was wondering,

When the implementation of a new infrastructure from scratch, with an ESX cluster from scratch

and when the servers DNS themselves will run inside the cluster,

Then, it is advisable to use IP addresses instead of the domain name COMPLETE for the right ESX environment?

Here's what I've done so far:

-installed 1 ESX host

-installed donain controller as VM

-installed PSC and VCSA

-created the new cluster

-installed the second ESX host, added to the cluster.

I installed a VM DC as the first thing after the installation of the initial ESX host, I could have started using the domain name COMPLETE for the ESX environment at this time.

However, I didn't do it.

For installation of the VCSA and when you add ESX hosts to the cluster, I used IP addresses instead of the FQDN names.

It seems stupid and dangerous for me to use domain COMPLETE the ESX hosts themselves, because the domain controller is running in the cluster.

So I used IP addresses only to ensure the ESX HA cluster and the characteristics of heartbeat stay ok if something were to happen to the DNS server.

However, the VCSA installation and when you add hosts to the cluster,.

the MISTLETOE gave me a warning, indicating that it is preferable to provide a FULL domain instead of an IP address name.

I am of the opinion that if you have no physical DNS servers, it is not a good idea.

My opinion is that when your nameservers inside the ESX cluster itself and you do not have 2 redundant external DNS servers, so it is not wise to use the FQDN for your ESX hosts, PSC and VCSA setup.

In my view, using the property intellectual property is much safer in this case.

I was wondering what is your angle on it.

Do you see the same way, or have different opinions?

Hi smetter,.

It is advisable to have a working DNS for vSphere environment however the use of DNS for things like vSphere HA have been removed in more recent versions of the product. Refer to the section of the guidelines of the general network of this document for more details: https://www.vmware.com/files/pdf/techpaper/vmw-vsphere-high-availability.pdf

With this in mind I wouldn't be worried about use of FULL domain for the addition of services like the ESX host, etc.. Failure where HA would be restarting the virtual computer, there is no dependency on DNS so it will continue to work as expected and, subject to the availability of resources the virtual machine starts on another host.

According to your vSphere licenses, you may also like to consider the implementation of anti-affinity DRS VM to keep your DNS Appart servers and on different hosts. This can prevent your servers DNS are declining when the failure of a host. You must have Enterprise edition or later for this.

Kind regards.

Tags: VMware

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