Hi Cris, maybe your problem is related to this bug ? https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/997978
Regards. Ale On Fri, Oct 5, 2012 at 8:44 AM, Christian Parpart <[email protected]> wrote: > Hey all, > > we're pretty happy about our new OpenStack Essex installation atop of > Ubuntu 12.04 (hypervisor and guests). > We use KVM (tenant is in a VLAN) as virtualization technology, having > about 15 compute nodes, and a > central nova-network node to act as the gateway (yet to be fully HA'd, > however). On that gateway we're having > a PPTP VPN so we can log in on any host or guest though this VPN. > > Our problem however is, that from time to time (I think it's daily and > even multiple times per day) > we're encountering kind of networking freezes. > > I first noticed it as my SSH session froze for a few seconds from my > desktop -> VPN (nova-network node) -> KVM guest. > I quickly checked others, and they hang, too. > I checked a hypervisor, which didn't hang, so it is not a general > networking issue (like PPTP or SSH or alike). > > Now, it feels like there is some problem with networking from and/or to > KVM guests and I absolutely have no clue > on how to trace this down. It really feels like a bug, but that's really > out of my scope, and that's why I'm seeking for advice here, > since we just can't stay in this situation :-) > > It is confirmed that we're having this from desktop -> VPN -> KVM and from > physical node (in data center) to KVM. > However, I do not yet know whether all KVMs are affected at once (which > would indicate that the issue MAY be caused > by the central nova-network node) or whether it is just hypervisor based > (so it may be due to some hypervisor's state) > or just plain random across all 15 compute nodes we have. > > I now think that this issue may indeed be KVM networking related > > I'll be happy about any hints and proposals you can provide me in order to > track this > issue down. > > Please tell me about any further information you need. > > Many thanks in advance, > Christian Parpart. > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : [email protected] > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > >
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