Hey all,
Sorry for the lengthy email, just trying to explain my issue the best
that I can.
I'm trying to run devstack with neutron within a guest.
The host of this guest is a Ubuntu 14.04 machine devstack running
nova-net. To simplify setup and teardown of devstack within this guest,
I add an OVS bridge to eth0 (br0) and specify it within the localrc.
This allows stack.sh and unstack.sh to run without losing ssh access to
the guest/machine. Basically, I'm stuck at getting a DHCP request from
the guest's OVS bridge honoured by the host's nova-net. Here's what happens:
1) I spawn the guest (Ubuntu 14.04) and it's properly networked (Can
ping it and ssh to it from outside the host).
2) I then install openvswitch and add the OVS bridge (sudo ovs-vsctl
add-br br0; sudo ovs-vsctl add-port br0 eth0)\
3) Of course eth0 then loses connectivity. So I use the following
/etc/network/interfaces file to remove eth0's IP and set it to
promiscuous mode. It also sets the bridge to use DHCP and sets it to
promiscuous mode.
|#eth0 set to manual, br0 set to dhcp
# The loopback network interface
auto lo
iface lo inet loopback
||
# The primary network interface
auto eth0
# iface eth0 inet dhcp
iface eth0 inet manual
||
up ifconfig $IFACE0.0.0.0 up
up ip linkset $IFACE promisc on
down ip linkset $IFACE promisc off
down ifconfig $IFACE down
||
auto br0
iface br0 inet dhcp
up ip linkset $IFACE promisc on
|
4) I then cycle br0 and eth0. As expected eth0 loses it's IP and is set
to promisc on. *br0 then issues a DHCP request which never gets
honoured*. This is where I'm stuck. Any ideas?
*Also worth noting*, I've tried using neutron on the host which was a
bit more successful. Neutron has a concept of ports where you can
specify MACs to serve. I added the OVS bridge's MAC address to the port
list and DHCP requests were fulfilled. However, the bridge could not
ping in or out after receiving its IP. Does nova-net have something
similar?
I also posted about it here, so if you want more info this might be
helpful.
https://ask.openstack.org/en/question/79792/using-ovs-within-an-instance-whose-host-is-running-nova-net/
If you need any other info, more detail, etc. Please do not hesitate to
ask, I really appreciate any help!
Thanks,
Mike Turek
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