Re: [Xen-API] Patch discussion: Add NTP field to PIF to ntp configure

[Simon Rowe <simon.rowe@xxxxxxxxxxxxx>]

On Thursday 07 Oct 2010 11:04:33 Rob Hoes wrote:

> The patch looks good to me as well, and could indeed be quite useful. I'd
> just like to ask Simon Rowe (cc'ed) to review the part where ntp.conf is
> changed, as I am not too familiar with that.
> 
> Simon, could you take a look at Alberto's email below and the changes to
> interface-reconfigure, which are at the end of the patch (I have
> re-attached it)?

It doesn't appear to handle local clock sources properly.

In short any IP address that starts 127.127. refers to a local source of time. 
This can either be a free running clock or a piece of hardware. It makes no 
sense for anyone other than ntp to be aware of local clocks so they should be 
filtered out when presented to the user or stored in xapi. When the list of 
servers is being rebuilt any local clocks should be preserved.

        Simon

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