VCF 9.1 installer deployment is failing in Step "VCF Management Services Deployment Task"

Products

• VMware SDDC Manager / VCF Installer

Issue/Introduction

• VCF installer logs shows the following error:
  
  Specified NTP server is specified incorrect
  
  
  /var/log/vmware/vcf/domainmanager/domainmanager.log
  

  yyyy-mm-ddThh:mm:ss.zzz+0000 ERROR [vcf_dm,################################,####] [c.v.e.s.o.model.error.ErrorFactory,dm-exec-782] [######] PUBLIC_FLEET_LCM_TASK_FAILED The Fleet lifecycle
  {0}
  task with ID <task_id> failed. Internal errors: Status polling timed out. 
  ..
  Review the logs to check operation progress. Increase the timeout value if the operation requires more time.

  
  
  /log/vmware/vcf/sddc-support/sos-<<epoch>>/VCFMgmtComponents/vcf-management-services/<<vcfsr-fqdn>>/services-logs/vcf-sddc-lcm/<<node-name>>/vcf-sddc-build-service-sddcbuild-#########-#####/sddcbuild/console-log-<task_id>.log
  

  [<task>, taskId=<task_id>]- Failed to create VCF Operations cluster
  yyyy-mm-ddThh:mm:ss.zzz stdout F org.springframework.web.client.HttpServerErrorException$InternalServerError: 500 500 on POST request for "https://<VCFOPS_FQDN>:443/casa/cluster": 
  "{
  	"error_message_key": "ntp.chain.validation.failed",
  	"error_arguments": ["<NTP_FQDN>"],
  	"error_message": "Specified NTP server is specified incorrect."
  }"

Environment

VCF 9.1

Cause

Configured NTP Server is not reachable from VCF Operation Appliances

Resolution

Check UDP port 123 is opened for NTP traffic between VCF components