| Re: [chrony-users] Does chrony support the DHCP option ntp-servers? |
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- To: chrony-users@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-users] Does chrony support the DHCP option ntp-servers?
- From: Miroslav Lichvar <mlichvar@xxxxxxxxxx>
- Date: Tue, 31 Mar 2020 17:09:23 +0200
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On Tue, Mar 31, 2020 at 03:03:17PM +0000, Jason W. Lewis wrote:
> Miroslav,
> You are correct, this is about the client-side; I've already got my DHCP server configured.
>
> After reading your and Holger's comments, I did realize I was going somewhat in the wrong direction, though. As I now understand it, the configuration is (at least mostly) with the DHCP client. I am working on this on CentOS 8, and am using Network Manager. I see that NM has a chrony script (/etc/NetworkManager/dispatcher.d/20-chrony) which, when the network goes up or down, toggles the on/offline status of chrony. I also see that it has a script (11-dhclient) looks to see if there are scripts in /etc/dhclient.d, and runs them. One of the scripts it looks for is one for chrony. Unfortunately, that directory doesn't exist, much less the script itself.
That missing script is /etc/dhcp/dhclient.d/chrony.sh. It all should
work out of the box. I maintain the chrony package in RHEL/CentOS. :)
> To further potentially complicate things, These systems are PXE booting, so they're getting their info from a DHCP server before the kernel and the OS load.
I wouldn't expect that to matter. NetworkManager should make its own
DHCP request.
--
Miroslav Lichvar
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