Maarten Wiltink <[email protected]> wrote: > "Rob" <[email protected]> wrote in message > news:[email protected]... >> unruh <[email protected]> wrote: >>> On 2010-08-19, Rob <[email protected]> wrote: >>>> unruh <[email protected]> wrote: >>>>> On 2010-08-17, folkert <[email protected]> wrote: > >>>>>> Is it possible to run the NTP daemon only as a server and not as a >>>>>> local-clock maintainer? >>>>>> Reason: I have a virtual machine which gets its time via the vmware >>>>>> tooling from the hardware server it is running on. Now this virtual >>>>>> machine needs to distribute the time to clients. >>>>> >>>>> Aarrgdaagh. Why would you have a virtual machine, with its >>>>> remarkably unreliabl e clock serve its time to others? >>>> >>>> Some companies are virtualizing all their hardware. >>>> E.g. this is happening where I work as well. All the servers have >>>> been replaced by a number of Vmware ESX machines. >>>> So there is no physical hardware machine left to run as the ntp >>>> server. >>> >>> uh, to quote Landauer, all information is physical. All virtual >>> machines MUST also run on physical machines. >> >> But that does not mean you can run NTP on them. >> >> E.g. on VMware ESX, you cannot do this. >> (there is an NTP running on the console session, but that is just a >> virtual machine running a Linux variant, it is not running on the >> physical machine either) > > And not so long ago, somebody quoted a more recent whitepaper here > that said running NTP in the virtual machines was now working much > better and in fact recommended.
You misread my statement, which was probably not very clear. With "But that does not mean you can run NTP on them" I meant to say that you cannot run NTP on the physical machine. In VMware ESX, you cannot run user processes on the physical machine. The NTP that is running on ESX (in the console session) is running in a virtual machine. And yes, they do recommend (and it works OK in my experience) to run NTP in all your virtual machines to keep their time synchronized. (as opposed to using the "old" method of synchronizing the virtual machine time to the host time, a setting in VMware tools) _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
