Hi Jiaan, The problem may relates to SNAT iptables set by nova-network. Based on the description, I guess you have only one nova-network running on Controller.
Please try: 1. add the following line to /etc/nova/nova.conf --mutil_host=true 2. start a nova-network instance on Compute Node service nova-network start 3. reboot your instance, to enforce network filters on Controller nova reboot $id try to access your vm instance. *Best Regards, Xiaolin Zhang* On Sat, Jul 14, 2012 at 10:58 AM, Jiaan Zeng <l.alle...@gmail.com> wrote: > Hi List, > > I have a network problem while setting up essex. The instances on control > node can access internet, while instances on compute node cannot. I tcpdump > the ping traffic and found something weird. VM on compute node can send > ICMP request out and the src ip of the ICMP package is changed to ip of > control node. Destination can receive the request and reply back to control > node. But VM on compute node gets nothing back. I can ping control node > from VM on compute node though. Based on that, I think there should be > something wrong with the gateway set up by nova-network. But I don't know > how to do further debug. > > Any suggestions would be greatly appreciated! > > I set up on two machines. Each has only *one* NIC. I use FlatDHCPManager > and place the bridge on the public NIC. Below is my configuration file of > network part. > > --network_manager=nova.network.manager.FlatDHCPManager > --public_interface=eth0 > --flat_interface=eth0 > --flat_network_bridge=br100 > --fixed_range=192.168.22.32/27 > --floating_range=10.42.0.32/27 > --network_size=32 > --flat_network_dhcp_start=192.168.22.33 > --flat_injected=False > --force_dhcp_release=True > > -- > Regards, > Jiaan > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack@lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > >
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