Error: Could not connect to one or more vCenter Server systems:https://FQDN:443/sdk

Products

• VMware vCenter Server

Issue/Introduction

• vCenter HA (VCHA) is enabled
• Upon logging into vCenter, the message "Could not connect to one or more vCenter Server systems:https://FQDN:443/sdk" is received at the top of the screen
• In the vpxd.log you see the following:
  
  YYYY-MM-DDTHH:mm:ssZ warning vpxd[#####] [Originator@#### sub=HttpConnectionPool-######] Failed to get pooled connection; <cs p:00007fd6e008efd0, TCP:<FQDN>:443>, SSL(<io_obj p:0x00007fd5c009efd8, h:32, <TCP '127.0.0.1 : 47280'>, <TCP '127.0.0.1 : 443'>>), duration: 2msec, N7Vmacore3Ssl18SSLVerifyExceptionE(SSL Exception: Verification parameters:
--> PeerThumbprint: ##:##:##:##:##:##:##:##:##:##:##:##:##:##:##:##:##:##:##:##
--> ExpectedThumbprint: 
--> ExpectedPeerName: <FQDN>
--> The remote host certificate has these problems:
--> 
--> * certificate has expired)

Environment

8.x

Cause

There is an expired trusted root certificate preventing vpxd from starting.

Resolution

Follow the steps outlined in Using vSphere Certificate Manager to Replace SSL Certificates under the section 'Implement Default Certificates (use Option 4 or 8)' to regenerate valid SSL certificates.