Public bug reported: Binary package hint: kvm
We have seen that guest machines can fall considerably behind wall clock time. This is apparently a well know phenomenon with virtual machines, and is the subject of a VMware whitepaper (http://www.vmware.com/pdf/vmware_timekeeping.pdf). In this whitepaper, it is stated that running NTP guest machines is not a good idea, and it is reasonable to imagine that the NTP server would go crazy when the clock constantly is lagging. A better solution is to have a cron script that runs regularly, updating the time to the value of the host's hardware clock. We are running with Ubuntu JeOS, where NTP is a required package. For the above reasons, this is not a good idea. A package containing a time synchronizing cron script is a much better solution. Ubuntu JeOS should ship with such a package. Another solution (?) could be a modification to KVM, so its virtual clock device would be tied to the host clock. Details: Host machine runs Ubuntu server 7.10. kvm is a locally back-ported hardy package: QEMU PC emulator version 0.9.0-cvs (kvm-59) ** Affects: kvm (Ubuntu) Importance: Undecided Status: New -- guest machines falls behind time https://bugs.launchpad.net/bugs/200648 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
