12.02.2013, 20:50, "Mauricio Tavares" <raubvo...@gmail.com>:
> On Thu, Jan 3, 2013 at 9:01 PM, Nico Kadel-Garcia <nka...@gmail.com> wrote:
>
>> On Jan 2, 2013, at 19:27, "James B. Byrne" <byrn...@harte-lyne.ca> wrote:
>>> I do that as well. However, I run one on each host just to serve its
>>> own guests and configure the host to run off our central ntp server.
>> Unfortunately, before our upstream vendor's OS release 6, ntp.conf
>> listed several loopback addresses by default. These allowed a confused
>> ntpd to basically marry its siblings and eventually crossbreed itself
>> to a fairly stange state. But it will report ntpd as active, which is
>> why the Nagios check "chek_ntp_)time" actually compares the time to a
>> known good upstream NTP service.
>
> Dumb question: why not use the vm host's clock instead? I am
> coming from libvirt but I would assume (bad idea I know) that if
> libvirt can see the host's clock in the client, so can kvm. If that is
> the case, something like
>
> hwclock -s -u
>
> should keep them in sync. I wrote a little cron job (see
> http://unixwars.blogspot.com/2013/01/restoring-time-on-sleeping-linux-vms.html)
> to compare the client time with the host. If the drift is large
> enough, sync them back. The reason for the cron job is so it works
> after client wakes up from a slumber. Just throwing an idea out there.
>
> On a side note, yes I did also write another script using ntpq and
> ntpdate to adjust time using ntp. I guess each solution has its
> merits. =)
>
>>>>> 4. On each guest have a cron job that checks for ntpd at regular
>>>>> intervals which reports failures and restarts the time service as
>>>>> necessary. We use:
>>>>> JOBNAME="Check ntpd status and restart if required" ; \
>>>>> ntpstat > /dev/null && \
>>>>> if [[ $? -gt 0 ]]; then /sbin/service ntpd start; fi
>>>> Why not configure the ntpd daemon and stick with that?
>>>> It does update on its own [1]. And ntpstat prints out the interval,
>>>> which matches the one mentioned at [1].
>>>> I don't believe the ntpstat script/job is necessary (I've never had to
>>>> do more than set ntpd to run after configuring the servers it should
>>>> poll).
>> See above. The 'check_ntp_time' tool is much more flexible and complete.
>> itten does work. It's part of the "nagios-plugions-ntp" package,
>> available from EPEL and RPMforge.
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Hi. To get the same at all WM. I installed and configured ntp-server.
--
Трудно жить ничего не делая, но мы привыкли бороться с трудностями.
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