Dell VxRail: How to redeploy an NSX-T manager node when it is down and unrecoverable in the cluster | NSX-T 3.2

Summary: This KB can be used to redeploy an NSX-T manager node when it is down and unrecoverable in the cluster | NSX-T 3.2.

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Instructions

Before using this KB, ensure that the current NSX-T manager node is unrecoverable and the other nodes in the NSX-T cluster are still providing service.

1. Login to the NSX-T manager and detach the problem node from existing cluster.
a. Login to the SSH and run the command "get cluster status". 
get cluster status  
b. Identify the node that is down or failed.
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2. Remove the problem node from NSX manager cluster.
a. Query the problem node UUID with "get cluster config". 
get cluster config
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b. Remove the problem node from the cluster using the command "detach node <uuid>", where uuid is the UUID identified above. 
detach node <uuid> 
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3. Redeploy a new NSX-T node. See the official VMware document to deploy new NSX-T manager.

https://docs.vmware.com/en/VMware-Validated-Design/6.0.1/sddc-backup-and-restore/GUID-9D125AA7-202E-442E-874D-77D303389A11.html

4. Add the new NSX-T node to the existing cluster.
a. Prepare the existing NSX-T cluster information before adding the new NSX-T manger node to the existing cluster.
  
get cluster config  | find cluster id 

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get certificate api thumbprint | NSX-T Manager API certificate
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b. Add node to existing cluster.  
ssh to new NSX-T manager
join existing_manager_node_ip cluster-id cluster_id thumbprint api_thumbprint username admin
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c. Check the cluster status. Allow about 10 minutes for all services to come up. 
get cluster status 
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Affected Products

VxRail
Article Properties
Article Number: 000209841
Article Type: How To
Last Modified: 12 Apr 2023
Version:  1
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