Customer is using Dell XC430-4.
vCenter version 6.5.0 (Build 17994927)
ESXi version 6.5.0 Update 3 (Build 18071574)
AOS cluster ID el7.3-release-fraser-6.1-stable-d0d01a21610008feb6f566fbfe4aa767bda26e0
Target upgrading to
ESXi version 7.0u2a using dell offline bundle VMware-VMvisor-Installer-7.0.0.update02-17867351.x86_64-DellEMC_Customized-A03
kindly advise me the
Yes, you can do it without any issue. put one host into maintenance mode and update and restart than continue with other hosts .
Keep in mind when you are going to put the host into maintenance before that you have to shutdown the host CVM properly .
Important thing, After upgrading vCenter then ESXi, upgrade AOS from 6.1 to 6.5, because 6.1 will be EOL within Month. Upgrading ESXi and DRS is not enable, you have to upgrade it manually through vSphere not Nutanix. For more details:
If DRS is not enabled, you must upgrade ESXi manually as below:
If you are upgrading all nodes in the cluster at once, shut down all guest VMs and stop the cluster with the cluster stop command.
If you are upgrading the nodes while keeping the cluster running, ensure that all nodes are up by logging on to a CVM and running the cluster status command. If any nodes are not running, start them before proceeding with the upgrade. Shut down all guest VMs on the node or migrate them to other nodes in the Nutanix cluster.