Thanks for the feedback and info. No fix yet, but using tcpdump -nnvvXS -i wlan0 icmp on the control node, it would appear that the outbound interface is showing ICMP echo request, but no replies. I see replies when I ping from the control host.
I could be completely wrong, but my guess is dns works because of dnsmasq. So it's a case where dnsmasq listens on the bridge, gets dns req, forwards the req on the outbound interface, gets reply and then sends reply out the bridge interface to VM. I saw this problem before and somehow it fixed itself. I've since upgraded to Folsom and I'm back to having the original problem. On Fri, 2012-09-28 at 09:50 -0300, Gui Maluf wrote: > Jon, I was facing a similar problem, the only difference was I had 2 > NICs. I've tried many things to figure out what was happening, but I > found nothing. > What I did to fix it was use > multi_host[https://lists.launchpad.net/openstack/msg16656.html] set > up, then all vms was able to access internet. > I think a important information is the iptables NAT table. > And I workaround that may be usefull is kill dnsmasq, as restart nova > services. > > I would like to know more about why this is happening. Why vms can > resolve name but can't receive the packets back, is a iptable issue? a > route issue? masquerade, or what? > > hope you can fix it > > On Thu, Sep 27, 2012 at 3:08 PM, Jon Thomas <[email protected]> wrote: > > Hi, > > > > I have a control node running nova-network using FlatDHCPManager and a > > compute node only running nova-compute. It's a single nic setup. I can > > start VM's on the compute node and ssh/ping them from the control node. > > I can also ping from vm to control node bridge ip and em1 device ip. > > However, I cannot ping from the VM to outside internet ( although DNS > > apparently works). I set em1 on both to promisc and have ip-forwarding > > on. iptables seem to have the right entries. Any ideas? > > > > here's conf, iptables, etc: > > > > http://paste.openstack.org/show/21159/ > > > > thx > > > > > > > > > > _______________________________________________ > > Mailing list: https://launchpad.net/~openstack > > Post to : [email protected] > > Unsubscribe : https://launchpad.net/~openstack > > More help : https://help.launchpad.net/ListHelp > > > _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : [email protected] Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
