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Date:      Thu, 28 Jan 2016 11:13:35 -0800
From:      Neel Natu <neelnatu@gmail.com>
To:        dweimer@dweimer.net
Cc:        Sergey Manucharian <sm@ara-ler.com>,  "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org>
Subject:   Re: bhyve with Linux guest, how to safely handle updates?
Message-ID:  <CAFgRE9FeVRF8OjNUYTA9yFpyVsnmHzZYKV=0an-1qnJYN5wfoQ@mail.gmail.com>
In-Reply-To: <94df01924b1843c39aaf29a47a4fa2da@dweimer.net>
References:  <790acf0350e0f10e79b4120e564a553c@dweimer.net> <20160126230338.GM4109@debian.ara-ler.com> <9ee895854c862cccc0bcc84c16eee063@dweimer.net> <20160127021348.GE1799@dendrobates.araler.com> <94df01924b1843c39aaf29a47a4fa2da@dweimer.net>

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Hi Dean,

On Thu, Jan 28, 2016 at 10:55 AM, dweimer <dweimer@dweimer.net> wrote:
> On 2016-01-26 8:13 pm, Sergey Manucharian wrote:
>>
>> Excerpts from dweimer's message from Tue 26-Jan-16 19:07:
>>>
>>>
>>> Is there anything that normally needs to be done after a Linux kernel
>>> update to refresh the grub2-bhyve setup?
>>
>>
>> The kernel update should not have any effect since grub-bhyve uses the
>> virtual disk mapping file, which should point to your linux drive.
>>
>> I'm using the following command:
>>
>> $ sudo grub-bhyve -m /path/to/device.map -r hd0,msdos1 -M 1024M debian
>>
>> where "device.map" contains the following:
>>
>> (hd0) /dev/zvol/zroot/linuxdisk1
>> (cd0) /stuff/vm/bhyve/debian/debian-testing-amd64-2015-11-30.iso
>>
>> "hd0" can be a real disk device, e.g. /dev/sda, or an image file (in
>> my case it's a ZFS volume).
>>
>> How do you use that VM in VBox? If it's a .vdi file, bhyve will not be
>> able to recognize it. You should use a raw HDD image file. To make it
>> compatible with VBox you can create a .vmdk file pointing to that raw
>> image.
>>
>> --
>> Sergey
>
>
> I am back to testing again, copied my ZFS Boot Environment over to a VMware
> virtual machine, renamed it and changed IPs, removed the virtual box stuff,
> and enabled bhyve.
>
> I did some searching and found out that I was using
> https://github.com/churchers/vm-bhyve to manage the bhyve virtual machines
> starting and stopping. Sticking with zvol for disk backing, I know its less
> portable.
>
> I have been able to install a couple of debian virtual machines and play
> around with them. So far I have been unable to duplicate the issue I had
> before. My current issue which maybe related to running inside a VMware
> virtual machine. Is the Linux hwclock and system clock sync issues. If I
> power off the vm and reboot it it believes that the disk was modified in the
> future and appears to hang. Its actually doing a fsck I just don't see
> status if you wait long enough it finally does come up.
>
> Has anyone else ran into this issue? I have actually ran the hwclock
> -systohc --utc prior to powering down and still had the issue. Tried
> changing the hwclock to system time by excluding the --utc from the command
> no change. Incidentally whether I use the --utc or not the hwclock --show
> always displays the local time. I couldn't seem to find any documentation on
> bhyve whether or not I should tell the guests that the hwclock is in utc or
> local time.
>

The "-u" option of bhyve(8) will configure the RTC to present UTC time
to the guest (default is localtime).

best
Neel

> --
> Thanks,
>    Dean E. Weimer
>    http://www.dweimer.net/
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