Running OVS in CoreOS

There are two ways to run or install OVS in a CoreOS environment:

• Build a CoreOS image with OVS

• Run OVS inside a Docker container with the –net=host option

As we have already seen in Chapter 1, CoreOS, Yet Another Linux Distro in CoreOS there is no way to install an application. Any service/application should be deployed in a container. So the simple way to run OVS is to run OVS inside a Docker container. Let us see how we can install an OVS docker in CoreOS.

There is already a docker image available with OVS (coreos-ovs). Download this docker image from https://github.com/theojulienne/coreos-ovs github link. Use the following cloud-config to start this container:

#cloud-config

coreos:
  units:
    - name: docker.service
      command: start
      drop-ins:
        - name: 50-custom-bridge.conf
          content: |
            [Service]
            Environment='DOCKER_OPTS=--bip="10.0.11.0/8" --fixed-cidr="10.0.11.0/24"'
    - name: OVS.service
      command: start
...