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docker_using_ovs_bridge

This patch allows docker to use OVS bridge instead of its default linux bridge "docker0". Now, whenever docker creates a container, it binds its veth* interface to this OVS bridge (instead of docker0).

Pre-requisites

  1. Stopping Docker and removing docker0

$ sudo service docker stop
$ sudo ip link set dev docker0 down
$ sudo brctl delbr docker0
$ sudo iptables -t nat -F POSTROUTING

  1. Make a new OVS bridge

$ sudo ovs-vsctl add-br ovs_bridge
$ sudo ovs-vsctl set bridge ovs_bridge protocols=OpenFlow10
$ sudo ip addr add 192.168.2.0/16 dev ovs_bridge
$ sudo ip link set dev ovs_bridge up
$ sudo ovs-ofctl show ovs_bridge

  1. Link docker to the new bridge and restart docker

$ echo 'DOCKER_OPTS="-b=ovs_bridge"' >> /etc/default/docker
$ sudo service docker start

Confirming new outgoing NAT masquerade is set up
$ sudo iptables -t nat -L -n

  1. Check whether docker is using your ovs bridge
    Run $ps -eaf | grep docker
    (docker -b ovs_bridge)

  2. Create a container and check if its interfaces are bound to the OVS bridge
    Use this command : $ sudo ovs-vsctl show