Bug 51767 – AD Member Mode: dhcp ntp server settings overwrite local ntp server

Bug 51767 - AD Member Mode: dhcp ntp server settings overwrite local ntp server


Summary:	AD Member Mode: dhcp ntp server settings overwrite local ntp server

Status:	NEW

Product:	UCS
Classification:	Unclassified
Component:	AD Connector
Version:	UCS 4.4
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	---
Assigned To:	Samba maintainers
QA Contact:	Samba maintainers

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Reported:	2020-08-04 11:29 CEST by Felix Botner
Modified:	2020-08-05 00:14 CEST (History)
CC List:	1 user (show)

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What kind of report is it?:	Bug Report
What type of bug is this?:	1: Cosmetic issue or missing function but workaround exists
Who will be affected by this bug?:	1: Will affect a very few installed domains
How will those affected feel about the bug?:	2: A Pain – users won’t like this once they notice it
User Pain:	0.011
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Description Felix Botner

2020-08-04 11:29:41 CEST

Seen in our test environment:

During the member mode setup we
 * set the date/timezone from the windows server on ucs
 * set the windows server as ntp server

But in our test env ucs is configured to use dhcp and our dns4kvm service also provides ntp server settings. These settings are silently applied to the ucs and overwrite the local ntp server settings (/etc/dhcp/dhclient-exit-hooks.d/ntp, /run/ntp.conf.dhcp).

This caused a mismatch between the ucs and windows time in our tests and broke kerberos.

Maybe we should make the "request" /etc/dhcp/dhclient.conf configurable to remove "ntp-servers", but i'm not sure.

We should also check the ntp settings in our windows template.

For now i disabled the ntp dhcp stuff in the test ucs/test/scenarios/appliance-testing/ad-member.cfg.