[Users] Changing System Time from container under OpenVZ 7
jjs - mainphrame
jjs at mainphrame.com
Mon Jun 3 02:48:49 MSK 2019
Greetings -
I'm happy to report that the feature "time:on" works exactly as hoped for
in a CT
Jake
On Tue, May 28, 2019 at 10:07 AM jjs - mainphrame <jjs at mainphrame.com>
wrote:
> Thanks for this -
>
> I had a hardware failure and am down to one openvz server, so I don't want
> to rock the boat. When the new box arrives this week, I'll migrate the CTs,
> boot to the new kernel, try the sys_time capability and report back.
>
> Jake
>
> On Tue, May 28, 2019 at 2:57 AM Konstantin Khorenko <
> khorenko at virtuozzo.com> wrote:
>
>> On 05/21/2019 12:25 PM, Konstantin Khorenko wrote:
>> > Hi Jake, Ming,
>> >
>> > i've created a feature request to reintroduce sys_time capability:
>> > https://bugs.openvz.org/browse/OVZ-7096
>> >
>> > It does not look too complicated, so hope it will be implemented.
>> >
>> > BTW, feel free to contribute. :)
>> > IT worked in OpenVZ 6, need just to check the code of kernel and vzctl
>> and port the patches. :)
>>
>> JFYI: the feature is ready (documentation is TBD),
>> so you can use the feature, all you need is to update vzkernel and
>> libvzctl from factory repo:
>> vzkernel-3.10.0-957.12.2.vz7.96.6
>> libvzctl-7.0.521
>>
>> https://download.openvz.org/virtuozzo/factory/x86_64/os/Packages/v/
>> https://download.openvz.org/virtuozzo/factory/x86_64/os/Packages/l/
>>
>> Hope that helps.
>>
>> --
>> Best regards,
>>
>> Konstantin Khorenko,
>> Virtuozzo Linux Kernel Team
>>
>>
>> > On 05/20/2019 09:28 PM, jjs - mainphrame wrote:
>> >> Hi Konstantin,
>> >>
>> >> Just wanted to follow up on the removal of capability sys_time -
>> >>
>> >> This change is rather disappointing, because it means that virtuozzo
>> containers can no longer be used in the role they played in the past and
>> the management will likely just order
>> >> them replaced by VMware instances when it's time for hardware refresh.
>> >>
>> >> Sure, it's not optimal to have multiple containers potentially
>> adjusting the system time, but even if its a kludge, it was a very useful
>> one.
>> >>
>> >> Jake
>> >>
>> >>
>> >>
>> >> On Thu, May 16, 2019 at 8:59 AM jjs - mainphrame <jjs at mainphrame.com
>> <mailto:jjs at mainphrame.com>> wrote:
>> >>
>> >> Hi Konstantin,
>> >>
>> >> With commercial Virtuozzo, we deployed containers to various lans,
>> where each container served ntp, among other things.The host itself is
>> isolated.
>> >> Removal of this capability brings about a dead end scenario. Is
>> there some other way to accomplish the ntp server duties moving forward?
>> >>
>> >> Jake
>> >>
>> >>
>> >> On Thu, May 16, 2019 at 5:19 AM Konstantin Khorenko <
>> khorenko at virtuozzo.com <mailto:khorenko at virtuozzo.com>> wrote:
>> >>
>> >> On 05/16/2019 02:29 PM, Nethub Online - Ming wrote:
>> >> > Hi Konstantin,
>> >> >
>> >> > It is because we want to setup a NTP server in CT, and then
>> let other servers to update their system time via ntpdate from this CT.
>> However after install NTP server in
>> >> this CT, it
>> >> > is unable to start NTP service.
>> >>
>> >> Hi again,
>> >>
>> >> thank you, the usecase is understandable.
>> >> We usually just run ntp clients on all hosts and don't face
>> with time unsync in Containers,
>> >> it's only a matter of one-time configuration of ntp service...
>> >>
>> >> --
>> >> Best regards,
>> >>
>> >> Konstantin Khorenko,
>> >> Virtuozzo Linux Kernel Team
>> >>
>> >> > 於 2019年5月16日 下午5:25，"Konstantin Khorenko" <
>> khorenko at virtuozzo.com <mailto:khorenko at virtuozzo.com> <mailto:
>> khorenko at virtuozzo.com <mailto:khorenko at virtuozzo.com>>>
>> >> 寫道：
>> >> >
>> >> > On 05/15/2019 05:11 AM, Nethub Online - Ming wrote:
>> >> > > Hi all,
>> >> > >
>> >> > > In OpenVZ 6 users guide (
>> https://download.openvz.org/doc/OpenVZ-Users-Guide.pdf ), it allows me
>> to change hardware node system time from container by command
>> >> "vzctl set 101
>> >> > > --capability sys_time:on --save"
>> >> > >
>> >> > > However I found that there is no such parameter for
>> vzctl or prlctl under OpenVZ 7, may I know how to change hardware node
>> system time from CT under OpenVZ 7?
>> >> >
>> >> > Hi,
>> >> >
>> >> > no way at the moment and you are the first who ask for
>> it.
>> >> > Why do you need it?
>> >> > What it your usecase?
>> >> >
>> >> > Thank you.
>> >> >
>> >> > --
>> >> > Best regards,
>> >> >
>> >> > Konstantin Khorenko,
>> >> > Virtuozzo Linux Kernel Team
>> >> >
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