Date: Mon, 2 Nov 2015 18:40:43 +0100 From: =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= <roger.pau@citrix.com> To: Karl Pielorz <kpielorz_lst@tdx.co.uk>, <freebsd-xen@freebsd.org> Subject: Re: 'Live' Migrate messes up NTP on FreeBSD domU - any suggestions? Message-ID: <5637A01B.1010307@citrix.com> In-Reply-To: <151F73F1EF071C3C48F17866@[10.12.30.106]> References: <151F73F1EF071C3C48F17866@[10.12.30.106]>
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El 02/11/15 a les 16.09, Karl Pielorz ha escrit: > > Hi, > > We run a number of 10.x boxes under XenServer 6.5. On those boxes we run > NTP as a client with a few local time servers on the network to keep > the time in sync on that VM. > > There's a number of big threads on the Citrix forums about whether you > should, or shouldn't run NTP in domU's - but the consensus seems to be > you need to in order to keep the domU's clock accurately in sync. > > This works fine. > > However if we run a live migrate (to another XenServer node) or Xen > Storage Motion migration - the domU's ntp gets messed up. The time on > the domU is generally "ok" - but ntpq gives output like: > > " > ntpq> pe > remote refid st t when poll reach delay offset jitter > =========================================================================== > ntp0 193.67.79.202 2 u 931 1024 377 0.232 -4977.5 4207.29 > ntp1 66.228.38.73 3 u 890 1024 377 0.267 -4988.5 4616.94 > ntp2 64.246.132.14 2 u 990 1024 377 0.324 -4978.0 4207.98 > " I'm sorry, but I have no idea about ntpd, what does the above mean? The offset is too big with other peers and ntpd simply disconnects? There were some issues that I fixed some time ago regarding migration and PVHVM guests: http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=f8e8fd56bd7d5675e8331b4ec74bae76c9dbf24e http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=32c864a35ece2c24a336d183869a546798a4b241 You should make sure XenServer has both of this commits. Roger.
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