VMware Cloud Director communication failure due to NSX Manager expired certificates

Products

• VMware NSX

Issue/Introduction

Symptoms

• Communication failures between VMware Cloud Director and the NSX Manager.
• Unstable NSX Manager cluster behavior where the primary node role rotates frequently.
• Certificate alarms showing expired certificates
• Certificates showing expired in Certificates section of UI 

Environment

VMware NSX

VMware vCloud Director

Cause

The expired certificates prevent secure communication and disrupt the leadership election process within the NSX Manager cluster.

Without valid certificates, the environment cannot maintain a stable primary node or allow external integrations like VMware Cloud Director to connect.

Resolution

1. Run the Certificate Analyzer, Results and Recovery (CARR) Script to automate the replacement of the expired certificates.
2. Verify that the new certificates are applied across all nodes in the cluster to restore stability and connectivity.