> -----Original Message----- > From: centos-virt-bounces at centos.org [mailto:centos-virt- > bounces at centos.org] On Behalf Of Johnny Hughes > Sent: Thursday, July 30, 2015 4:41 AM > To: centos-virt at centos.org > Subject: Re: [CentOS-virt] Timezone issues with migrations between host > kernel 3.10 and 3.18 > > On 07/30/2015 06:38 AM, Johnny Hughes wrote: > > On 07/29/2015 11:38 AM, Nathan March wrote: > >> Hi All, > >> > >> > >> > >> I'm seeing clock issues with live migrations on the latest kernel > >> packages, migrating a VM from 3.10.68-11 to 3.18.17-13 results in the > >> VM clock being off by 7 hours (I'm PST, so appears to be a timezone > issue). > >> This is also between xen versions, but rolling the target back to > >> 3.10 resolved so don't believe the recent XSA's are related. > >> > >> > >> > >> Anyone else seen behavior like this or have any ideas on how to resolve? > > > > Some versions of CentOS have a hardware clock uses UTC check box. If > > that is on, and if your hardware clock is instead set to local time, > > that can cause issues. > > > > Can you check that there is no UTC=True in /etc/sysconfig/clock > > also, you can use tzselect to make sure the correct timezone is used. > I considered that so I did use hwclock to confirm that the hardware clock / system clock were both the same between the two servers, and comparing /etc/adjtime between the two indicates the hwclock should have been local time on both sides (unless this got changed when I downgraded the kernel to resolve the issue). Unfortunately I don't have a test machine for this at the moment, but can follow up in a couple weeks. - Nathan