devstack-dvr-multinode

I used the following OpenStack setup for the blog post series about Openstack Juno DVR.

East-West: http://blog.gampel.net/2014_12_14_archive.html

DNAT- Floating IPs: http://blog.gampel.net/2014/12/openstack-dvr2-floating-ips.html

SNAT- http://blog.gampel.net/2015/01/openstack-DVR-SNAT.html

In my setup all the controller services and the network services ran on one machine.

1. Clone the devstack into the controller node and into all the compute nodes

   cd /opt/stack git clone https://git.openstack.org/openstack-dev/devstack

2. Checkout the stable Juno relase

   cd devstack git checkout stable/juno

3. Copy the appropriate local.conf file controller/compute and modified it to match your host ip setup.

clone this repository

cd /opt/stack 

git clone https://github.com/gampel/devstack-dvr-multinode.git

cd devstack-dvr-multinode

On the controller node

cp controller-node/local.conf  /opt/stack/devstack 

On the compute nodes

cp compute-nodes/local.conf  /opt/stack/devstack 

Edit the local.conf file to match your setup

vi /opt/stack/devstack/local.conf

Modify the following values (where applicable):

HOST_IP <- The management IP address of the current node
FIXED_RANGE <- The overlay network address and mask
FIXED_NETWORK_SIZE <- Size of the overlay network
NETWORK_GATEWAY <- Default gateway for the overlay netowrk
FLOATING_RANGE <- Network address and range for Floating IP addresses (in the public network)
Q_FLOATING_ALLOCATION_POOL <- range to allow allocation of floating IP from (within FLOATING_RANGE)
PUBLIC_NETWORK_GATEWAY <- Default gateway for the public network
SERVICE_HOST <- Management IP address of the controller node
MYSQL_HOST <- Management IP address of the controller node
RABBIT_HOST <- Management IP address of the controller node
GLANCE_HOSTPORT <- Management IP address of the controller node (Leave the port as-is)

4. Run stack.sh (Make sure to complete on the controller before compute nodes)

   cd /opt/stack/devstack ./stack.sh

5. Set up the external bridge

Assuming the external network is connected to eth3

    ifconfig br-ex promisc up
    ifconfig eth3 0.0.0.0
    ifconfig eth3 promisc 
    ifconfig br-ex <address on ext>  netmask <mask>
    ovs-vsctl add-port br-ex eth3

Re-add the default route if needed

6. Update the neurton configuration to DVR mode

I modified the following configuration On the controller Node

• /etc/neutron/neutron.conf

  router_distributed = True

  dvr_base_mac = fa:16:3f:00:00:00

• /etc/neutron/l3_agent.ini

  agent_mode = dvr_snat

  router_delete_namespaces = True

• /etc/neutron/plugins/ml2/ml2_conf.ini

  [ml2]

  mechanism_drivers =openvswitch,l2population

  [agent]

  l2_population = True

  enable_distributed_routing = True

  arp_responder = True

I modified the following configuration On all the Compute Node

• /etc/neutron/l3_agent.ini

  agent_mode = dvr

  router_delete_namespaces = True

• /etc/neutron/plugins/ml2/ml2_conf.ini

  [ml2]

  mechanism_drivers = openvswitch,l2population

  [agent]

  l2_population = True

  enable_distributed_routing = True

7. For the floating ip association I used the neutron command line due to the horizon bug associating FIP

   neutron floatingip-associate

Which creates a mapping between a floating IP and a fixed IP.