Tasks are triggered after every 3 mins.
vCenter 8.0.x
Below log entries are observed in esxupdate.log,
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: raise URLError(err)
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: urllib.error.URLError: <urlopen error [Errno -2] Name or service not known>
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: During handling of the above exception, another exception occurred:
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: Traceback (most recent call last):
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: File "/lib64/python3.8/site-packages/vmware/esximage/Transaction.py", line 904, in _getVibsFromUrls
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: with d.Open() as rObj:
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: File "/lib64/python3.8/site-packages/vmware/esximage/Downloader.py", line 474, in Open
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: return self._openfromurl()
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: File "/lib64/python3.8/site-packages/vmware/esximage/Downloader.py", line 377, in _openfromurl
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: raise DownloaderError(self.url, self.local, str(e))
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: esximage.Downloader.DownloaderError: ('https://vR-appliance-IP:8043/vib/vmware-hbr-agent.vib', '', '<urlopen error [Errno -2] Name or service not known>')
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: return self._openfromurl()
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: File "/lib64/python3.8/site-packages/vmware/esximage/Downloader.py", line 377, in _openfromurl
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: raise DownloaderError(self.url, self.local, str(e))
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: esximage.Downloader.DownloaderError: ('https://vR-appliance-IP:8043/vib/vmware-hbr-agent.vib', '', '<urlopen error [Errno -2] Name or service not known>')
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: During handling of the above exception, another exception occurred:
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: Traceback (most recent call last):
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: File "/usr/sbin/esxupdate", line 378, in main
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: cmd.Run()
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: File "/lib64/python3.8/site-packages/vmware/esx5update/Cmdline.py", line 161, in Run
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: res = t.InstallVibsFromSources(viburls, metaurls, None,
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: File "/lib64/python3.8/site-packages/vmware/esximage/Transaction.py", line 834, in InstallVibsFromSources
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: self.GetVibsAndMetaFromSources(vibUrls, metaUrls, vibspecs,
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: File "/lib64/python3.8/site-packages/vmware/esximage/Transaction.py", line 269, in GetVibsAndMetaFromSources
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: vibsToInstall = Transaction._getVibsFromUrls(vibUrls)
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: File "/lib64/python3.8/site-packages/vmware/esximage/Transaction.py", line 928, in _getVibsFromUrls
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: raise Errors.VibDownloadError(url, None, str(e))
yyyy-mm-ddThh:mm:08Z Er(11) esxupdate[3695770]: esximage.Errors.VibDownloadError: ('https://vR-appliance-IP:8043/vib/vmware-hbr-agent.vib', None, "('https://vR-appliance-IP:8043/vib/vmware-hbr-agent.vib', '', '<urlopen error [Errno -2] Name or service not known>')")
yyyy-mm-ddThh:mm:08Z Db(15) esxupdate[3695770]: <<<
ESXi is unable to resolve vsphere replication IP or FQDN.
Fix the name resolution (DNS) on ESXi.
We can confirm/update DNS servers using below path,
From vCenter UI >> ESXi >> Configure >> Networking >> TCP/IP Configuration >> Default, review/update the DNS servers .