Circular dependency between local_unbound and ntpd?

krad kraduk at
Tue Jul 14 14:33:07 UTC 2015


$ grep REQUIRE /etc/rc.d/ntpd

You could set something similar to the following in the rc.conf

ntpdate_hosts="a.b.c.d w.x.y.z"

On 14 July 2015 at 14:43, Paul Mather <paul at> wrote:

> I believe I ran afoul of a circular dependency between local_unbound and
> ntpd on my 10.2-PRERELEASE system.  I use a stock /etc/ntp.conf and use
> ntpd_sync_on_start="YES".
> Last night, a BIOS settings reset cause my CMOS clock to go WAY out of
> synch for the first time.  No problem, I thought: NTP will correct it at
> boot.
> Wrong!
> When my system booted, the time was not corrected.  Also, DNS resolution
> was not working.  I figured out it was because local_unbound relies on an
> accurately set clock, but the clock could not be set accurately because my
> stock ntp.conf requires working DNS resolution to reach the NTP servers.
> That sounds like a potential circular dependency to me.
> My workaround at the time was to look up on
> another system; stop ntpd; then do a ntpdate using the IP addresses to set
> the clock. Once the clock was set accurately, things were all hunky dory.
> Does anyone have any suggestion for an automatic way around this?  I guess
> one way would be to put the IP address of an NTP server into my ntp.conf
> file, so at least one would be reachable without needing a working DNS?
> My main concern is for those systems like my Raspberry Pi and Beaglebone
> Black that don't have a battery-backed clock.  I currently don't use
> local_unbound on those, but it seems like I'd encounter this problem
> routinely if I did.
> Cheers,
> Paul.
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