From: "Adam King" <kinga@sghs.org.uk>
To: "Gary Hook" <garyrhook@gmail.com>
Sent: Friday, September 12, 2014 1:39:38 PM
Subject: Re: [libvirt-users] ntpd in VM

From: "Gary Hook" <garyrhook@gmail.com>
To: libvirt-users@redhat.com
Sent: Friday, September 12, 2014 1:25:47 PM
Subject: Re: [libvirt-users] ntpd in VM

While I agree that running a time server in a VM is, at best, problematic, most of those nay-sayers have experience with VMware, xen and the like. Those aren't the only hypervisors out there, and the decision process should depend upon the hypervisor (to a significant degree), not just the idea of "can I do this in a VM?" Not all hypervisors are created equally.

On Fri, Sep 12, 2014 at 7:14 AM, Pierre Schweitzer <pierre@reactos.org> wrote:

Hi,

It is still a bad idea. I invite you to read here for the reasons why:
http://serverfault.com/a/106509/150152

Cheers,

On 09/12/2014 12:51 PM, Mauricio Tavares wrote:
> I was taught in kitty school that running a ntp server in a vm
> was a bad idea. Is that still the case?
>

My experience is somewhat different. VMWare has always been problematic with this, especially Linux guests.

I've run KVM based NTP servers inside vm's (2 as active:standby) and dozens of ntp clients inside vm's for over a year now and seen no adverse results.

Admittedly I've not been checking the drift but I can vouch for the results.

Regards

Adam King