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VCF Nested Lab - Cloud Builder - Time Synchronization Validation - Rejected Windows NTP Server

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Hi all! I got a VCF - POC request but I'm testing it in a nested lab. My issue is that when Cloud Builder will validate data provided in the configuration file "Bringup" failed with warning at the Time Synchronization Validation step. I got Windows server 2019 as NTP Server and also I went through all the VMware KB to make a Windows NTP server work with ESXI hosts and CB. I noted that when I "RETRY" some hosts accepted the windows NTP server but others don't, if I "RETRY" again all host rejected including the cloud builder appliance which never accepted Windows NTP server as NTP source. I already manually configure NTP servers on the cloud builder appliance by vi /etc/systemd/timesyncd.conf & Add timeservers under [Time]

vm-cb = My VMware Cloud Builder Virtual machine.

AD-DC-1 = ADDC, DNS, DHCP & NTP

ITSA.CLOUD = My domain name.

Time Synchronization Validation Warning

Host 'b'vm-cb'' reject or unable to use NTP server ['AD-DC-1.ITSA.CLOUD'] as source.
Host 'b'vm-cb'' and NTP ['AD-DC-1.ITSA.CLOUD'] sync offset +602743 seconds (Expecting 30.0 seconds)
Host 'b'vm-cb'' and NTP '172.16.31.2' time drift >30.0 seconds
Host '172.16.31.101' reject or unable to use NTP server ['AD-DC-1.ITSA.CLOUD'] as source.
Host '172.16.31.102' reject or unable to use NTP server ['AD-DC-1.ITSA.CLOUD'] as source.
Host '172.16.31.103' reject or unable to use NTP server ['AD-DC-1.ITSA.CLOUD'] as source.
Host '172.16.31.104' reject or unable to use NTP server ['AD-DC-1.ITSA.CLOUD'] as source.
Host '172.16.31.104' and NTP '172.16.31.2' time drift 60271.447964668274 seconds (Expecting 30.0 seconds)
 
Hardware: just one physical server with ESXI 7.0 and VCF 4.1
288 GB RAM
4 TB HDD
 
Any help would be very appreciated!
www.ITSA.Cloud
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RickVerstegen
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Expert

Due to a nested environment it is common you get NTP issues. Ignore the warning and proceed with the bringup.

Blog: https://rickverstegen84.wordpress.com/ Twitter: https://twitter.com/verstegenrick

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RickVerstegen
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Expert

Due to a nested environment it is common you get NTP issues. Ignore the warning and proceed with the bringup.

Blog: https://rickverstegen84.wordpress.com/ Twitter: https://twitter.com/verstegenrick

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😀Ok! Thanks for replying. Just one more question since I'm new to the VCF - CB bringup process. So, the bringup will continue and complete even if I got Warnings?  

www.ITSA.Cloud
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RickVerstegen
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There is no guarantee that the bring up will complete. Even if you have green checks in the pre-check it can still fail during bring up.
I had the same NTP warning message in my nested lab, but i was able to complete the bring up successfully.

Blog: https://rickverstegen84.wordpress.com/ Twitter: https://twitter.com/verstegenrick
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👍Great answer! I will keep you post on the bring-up process.

www.ITSA.Cloud
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