On 14/07/14 06:51, [email protected] wrote:
I'm trying to do the same thing in an isolated network, except that
me
have around 60 kvm nodes running on 20 physical Linux boxes. Out of them
I'm trying to use 3 or 4 boxes as my NTP servers to form a HA time service.


You are trying to do two undesirable things at once: run a a time island; and directly update the clocks on VM guests. I don't think this should be attempted without individual consultancy from someone with detailed knowledge of the VM system in use.

Generally, the recommended way of handling time islands these days is to use a core network which peer each other and which use orphan mode to allow isolated operation. These should be chosen to have good and accurate clocks against UTC when free running.

The general approach for VMs is to synchronise the hosts and then use whatever mechanism the VM environment provides to synchronised the guests, possibly with the occasional resynch. You should advice from the VM environment provider as to how best to do this on their systems.

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