Le 19/02/2013 13:31, Gary Kotton a écrit :
The problem is as follows:
When you reboot the host the openvswitch will create the interfaces on
restart. this causes problems with the dhcp and the l3 agents.
the solution to this is to run the quantum-ovs-cleanup utility on
reboot prior to the dhcp and the l3 agents.
thanks
Gary
Hi Gary,
As I was stresstesting Quantum, I did noticed that the issue is similar
on my compute node : instances are unable to get DHCP address.
A quick look at network level shows that there is no GRE encapsulation
over DHCP packets.
I tried removing/adding br-int/br-tun, but the virtual network
interfaces (qvo) don't bridge to br-int if the VM was previously launched.
Spawning a new VM is successful, but rebooting (either by virsh
destroy/start, or thru Horizon) doesn't allow the qvo interface to be
attached again. A restart of nova-compute doesn't do the trick either.
Any idea ?
Thanks,
-Sylvain
Thanks,
-Sylvain
Le 18/02/2013 18:06, Sylvain Bauza a écrit :
Hi,
I'll try to be clear. I do follow a classic setup for Quantum with 2
NICs and a GRE tunnel in between nodes with br-int/br-tun.
Everything is fine at first install, but when rebooting the network
node (including quantum-ovs-plugin-agent, quantum-l3-agent and
quantum-dhcp-agent), I notice that DHCP assignation is failing for
my VMs.
A tcpdump shows at physical level that GRE packets are arriving on
eth0 (mgmt NIC) on network node (for DHCP request) but no reply is
done by the network node.
The workaround I found is to delete br-int and br-tun on network
node, create only br-int and restart both services
(quantum-{ovs-plugin,l3,dhcp} ) to get things done.
This is quite brutal. Do you know if it's a known bug, or something
bad with my setup ?
Thanks,
-Sylvain
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