Re: [chrony-users] Does chrony support the DHCP option ntp-servers?

[Bill Unruh <unruh@xxxxxxxxxxxxxx>]

On Tue, 31 Mar 2020, Jason W. Lewis wrote:

> 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. :)
>
> Oh wow, that's good to hear!  Do you then know which package I need to install to get chrony.sh?  dhclient itself is already installed, but the script is not present.  I tried "dnf provides chrony.sh", but no package was found.

On my Mageia 7 system ( which I agree is not Redhat/CentOS) it is in the above
directory and is supplied by the chrony package. Did you install chrony
while not root?
rpm -qf /etc/dhcp/dhclient.d/chrony.sh
chrony-3.4-2.mga7
> In any case, thank you for all the information provided.
>
> --
> Jason Lewis
> Senior Systems Engineer
>
>
> On 3/31/20, 11:09, "Miroslav Lichvar" <mlichvar@xxxxxxxxxx> wrote:
>
>    External email – Please make sure you trust the source before clicking links or opening attachments.
>
>    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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