vsphere Cluster + NSX

[rajeevsrikant]

I have 2 vSphere Clusters with 3 hosts each

Cluster A - 3 hosts with NSX installed

Cluster B - 3 hosts with NSX installed

I am planning to merge Cluster B hosts in to Cluster A & have only 1 cluster which will be Cluster A.

What is the right steps to achieve this ?

My understanding is below.

1) Host 1 in Cluster B migrate all the work loads & empty it.

2) Put the host into maintenance mode

3) Remove the host from cluster B & add it under Cluster A

Is this right or am i missing some thing.

Will NSX vibs be uninstalled & re-installed during this process.

Let me know.

[rajeevsrikant]

Found the below KB article.

NSX VIBs will be removed & then needs to be pushed.

VMware Knowledge Base

[bayupw · Accepted solution]

As per KB that you mentioned Supported methods for moving VMware NSX for vSphere 6.x prepared hosts across clusters (2127366) and this doc Remove a Host from an NSX Prepared Cluster

To remove a host from a prepared cluster, after moving the VMs you would need to move the host (in Cluster B in your case) to an unprepared cluster or making it a standalone host by moving it under logical Datacenter object.

Remove host from the prepared cluster by either moving it to an unprepared cluster or making it a standalone host outside of any cluster.

The other alternative would be uninstalling the cluster from NSX - Uninstall NSX from Host Clusters

Not sure if moving host directly to Cluster A will work as uninstalling NSX from host clusters in 6.3 doesn't require a reboot in 6.3

In the host has NSX 6.3.0 or later and ESXi 6.0 or later, you do not need to reboot a host to uninstall VIBs. In earlier versions of NSX and ESXi, a reboot is required to complete the VIB uninstall.

But the above KB or doc are safer in my opinion so you have a cleaner ESXi host to be added to Cluster A

[rajeevsrikant]

Thnx.

I will follow the steps mentioned in the KB article to be on the safer side to avoid any unknown or known issues.