[libvirt-users] ntpd in VM

[Adam King]

----- Original Message -----

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



----- Original Message -----

From: "Gary Hook" <garyrhook at gmail.com> 
To: libvirt-users at 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 at 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 

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