Posted by Deleting the NSX-T Controllers from the NSX Manager UI: Two controller nodes get deleted successfully but the last one fails with an error:
“Node was not connected; it was not reachable or the cluster was not in majority. Could not delete.”
Note: The Cluster Connectivity also shows “Down” in the screenshot above.
In order to resolve this, you would need “admin” access to the NSX-T controllers via putty to forcefully delete it.
1. Logon to the NSX-T controller via Putty using admin credentials and enter the following command:
Deactivate control-cluster force
2. Confirm that you receive the following success message:
“Control cluster deactivation successful”
3. Next, run the following command and hit enter:
set control-cluster security-model shared-secret secret <password1!>
Where “<password1!>” above can be any alphanumeric password
4. Confirm that you receive the following success message:
“Security secret successfully set on the node.”
5. Next, initiate the controller cluster by running the following command:
initialize control-cluster
6. Confirm that you receive the following success message:
“Control cluster initialization successful.”
7. Check the status of the control cluster by running the following command:
Get control-cluster status
The node’s “is master” and “is majority” will both show “true” as shown in the screenshot above.
Note: “The Cluster Connectivity” in the NSX Manage UI, will now show “Up”
8. Click the “gear” Icon and click “Delete”:
9. Click “Confirm”:
10. The Controller request should now proceed ahead with the deletion:
11. Alternatively, you could check vCenter vSphere client “Recent Tasks” to confirm the NSX-T Controller Virtual Machine deletion:
