NSX native load balancer with VCD cells in the server pool partially loads the VCD UI with a blue loading circle displayed on the rest of the UI

Products

• VMware NSX

Issue/Introduction

• The NSX native load balancer is small.
• The NSX Edge that the load balancer is running on is Large or X-Large. 
• All load balancer objects are in green and success states. 
• The load balancer is configured to perform SSL termination. 
• When accessing the VCD cell web page through the NSX native L7 load balancer, the user log-in page loads and log-in is successful. The UI page does not fully load, displaying a blue loading circle in the main frame like the example below. 

Environment

VMware NSX

VMware Cloud Director

Cause

The issue is related to SSL decryption and encryption that occurs when the load balancer is performing SSL termination and which is a CPU-intensive process. 

Resolution

Workaround:

• Configuring the load balancer for SSL passthrough so it is not required to decrypt and encrypt the SSL traffic, which will allow the full VCD UI to load. 

Additional Information

If SSL termination is required, try increasing the size of the load balancer to medium or large to provide it access to additional CPU resources to perform the SSL decryption and encryption. 

Related Links;

For capabilities of the Edge by its size, see NSX Edge VM System Requirements.

For a different load balancer issues related to VCD cell pools, see NSX-T load balancer unable to establish a secure connection to some VMware Cloud Director cells and VMware Cloud Director UI fails to load or shows "Unable to perform query" with an NSX-T Load Balancer.