"Host cannot download files from VMware vSphere Update Manager patch store." on an ESXi host.

Products

• VMware vSphere ESXi

Issue/Introduction

Symptoms:

• The error message is seen for selected hosts in the vCenter.
• On an affected host, esxupdate logs show:

esxupdate.log :
vmware.esximage.Errors.MetadataDownloadError: ('http://<vCenter-FQDN>:9084/vum/repository/hostupdate/vmw/vmw-ESXi-
6.7.0-metadata.zip', None, "('http://<vCenter-FQDN>:9084/vum/repository/hostupdate/vmw/vmw-ESXi-6.7.0-metadata.zip', '/tmp/tmp6wka6hem', '<urlopen error [Errno -2] Name or service not known>')") 
esxupdate: download from any URLs: ('http://<ESXi-FQDN>:9084/vum/repository/hostupdate/vmw/vib20/bnxtnet/VMW_bootbank_bnxtnet_216.0.50.0-44vmw.703.0.50.20036589.vib', '/var/vmware/lifecycle/hostSeed/reservedVibs/VMW_bootbank_bnxtnet_216.0.50.0-44vmw.703.0.50.20036589.vib', 'HTTP Error 404: Not Found')")
####-##-##T##:##:###Z esxupdate: 3833655: downloader: INFO: Downloading http://<ESXi-FQDN>:9084/vum/repository/hostupdate/vmw/vib20/i40en/VMW_bootbank_i40en_1.11.1.32-1vmw.703.0.125.23794027.vib to /var/vmware/lifecycle/hostSeed/reservedVibs/VMW_bootbank_i40en_1.11.1.32-1vmw.703.0.125.23794027.vib

• Forward and reverse lookup between the affected host and the vCenter are not perfect.
  
  

Environment

VMware vSphere ESXi 6.7

VMware vSphere ESXi 7.0

Cause

A faulty DNS entry or missing DNS entry in the ESXi host.

Resolution

• Ensure there are proper DNS records for the vCenter and the ESXi host in the DNS server.
• Open a console to the affected ESXi host.
• Login as root -> IPv4 settings -> Verify if the DNS server set there is right.
• Restart the management network.
• Refresh the vCenter web-client.
  
  

Additional Information

Reference KB for configuring DNS : Configuring VMware ESXi Management Network from the direct console