On Mon, May 28, 2012 at 08:41:30AM -0400, James B. Byrne wrote:
> We encountered a problem with respect to KVM virtual host restore and
> NTP. Specifically, our VM test host was shutdown by an extended power
> outage and when power returned all of the restored guests were
> immediately shutdown by ntp because the time differential between the
> restored systems and that of the ntpd sync servers exceeded the panic
> threshold.
Umm, ntp won't shut down your guests unless you've done something
non-standard. NTP inside the guest will abort because of the time
difference but the guest will keep running... just with the wrong time.
See the "-g" option:
-g Normally, ntpd exits with a message to the system log if the
offset exceeds the panic threshold, which is 1000 s by default.
This option allows the time to be set to any value without
restriction; however, this can happen only once. If the thresh-
old is exceeded after that, ntpd will exit with a message to
the system log. This option can be used with the -q and -x
options. See the tinker command for other options.
--
rgds
Stephen