Unable to connect the host https://host-ip/sdk during NSX-T Upgrade

Products

• VMware NSX

Issue/Introduction

• During the upgrade of NSX-T managers, hosts are not allowed to upgrade.
• The upgrade fails at the 'Performing dry-run of installation of NSX bits' step.
• The following error in upgrade-coordinator.log on the orchestrator node is present (/var/log/upgrade-coordinator/upgrade-coordinator.log):

             Unable to connect the host https://host-ip/sdk

Environment

VMware NSX-T Data Center

Cause

This issue is caused by blocked Host access from NSX Orchestrator node

Resolution

In vSphere go to the Host > Configure > System > Firewall. Connections > vSphere Web Client, change "Allowed IP addresses" should be set to all or the IP address of the orchestrator node.

 

 

Additional Information

Impact/Risks:

Not able to upgrade a host during NSX-T upgrade.