Error "Service is not available at this time" when accessing SDDC Manager instance in VCF Operations UI 9.x

Products

• VMware SDDC Manager / VCF Installer
• VCF Operations

Issue/Introduction

• While navigating to VCF Operations → Fleet Management → Lifecycle → VCF Instances → VCF instance, UI consistently displays the error:
  
  “Service or view is not available at this time.”

• Logs on VCF Operations located at /storage/log/vcops/log/web-vcf.log shows entries similar to:

YYYY-MM-DDThh:mm:ss ERROR web-vcf 29394 [ops@4413 threadId="75006" threadName="ajp-nio-127.0.0.1-8009-exec-2402"] [com.vmware.vcf.operations.ui.proxy.ProxyUtil.error] - Error occurred while serving the path: vcf-operations/plug/sddc-<plugin-id>/plugin/ops-plugin/index.html.
YYYY-MM-DDThh:mm:ss ERROR web-vcf 29394 [ops@4413 threadId="75006" threadName="ajp-nio-127.0.0.1-8009-exec-2402"] [com.vmware.vcf.operations.ui.proxy.ProxyUtil.error] - Connect timed out

Environment

• VMware Cloud Foundation (VCF) 9.0.x, 9.1.x

• SDDC Manager 9.0.x, 9.1.x

• VCF Operations 9.0.x, 9.1.x

Cause

This issue is caused by a network communication failure. SDDC Manager requires direct HTTPS connectivity over TCP port 443 to all VCF Operations Nodes to retrieve and display instance details.

Resolution

Ensure that TCP port 443 is open and reachable between the SDDC Manager and all VCF Operations Nodes.

To validate connectivity, open an SSH session to the SDDC Manager and execute the following commands against each VCF Operations Node:

1. Test TCP connectivity:

   curl -v telnet://<VCF_Operations_Node_IP>:443
   

   Expected result: A successful connection will return a Connected to <IP> or established connection message.

2. Test the SSL/TLS handshake:

   openssl s_client -connect <VCF_Operations_Node_IP>:443 < /dev/null
   

   Expected result: The connection is established and the VCF Operations Node certificate is displayed.

Refer to the VMware Ports and Protocols tool for a complete list of required ports for VMware products and solution

Additional Information

The same display behavior is observed if TCP port 443 is blocked between the SDDC Manager and the VCF Operations Fleet Manager Management IP address.

To address this, ensure that port 443 traffic is explicitly allowed between the SDDC Manager and the allocated IP address pool for the VCF Service Runtime (VMSP cluster).