How to try out nested-pods locally (VLAN + trunk)

Following are the instructions for an all-in-one setup where Kubernetes will also be running inside the same Nova VM in which Kuryr-controller and Kuryr-cni will be running. 4GB memory and 2 vCPUs, is the minimum resource requirement for the VM:

  1. To install OpenStack services run devstack with devstack/local.conf.pod-in-vm.undercloud.sample. Ensure that “trunk” service plugin is enabled in /etc/neutron/neutron.conf:

    service_plugins =,
  2. Launch a VM with Neutron trunk port. The next steps can be followed: Boot VM with a Trunk Port.

  3. Inside VM, install and setup Kubernetes along with Kuryr using devstack:

    • Since undercloud Neutron will be used by pods, Neutron services should be disabled in localrc.

    • Run devstack with devstack/local.conf.pod-in-vm.overcloud.sample. But first fill in the needed information:

      • Point to the undercloud deployment by setting:

      • Fill in the subnetpool id of the undercloud deployment, as well as the router where the new pod and service networks need to be connected:

      • Ensure the nested-vlan driver is going to be set by setting:

      • Optionally, the ports pool funcionality can be enabled by following: How to enable ports pool with devstack.

      • [OPTIONAL] If you want to enable the subport pools driver and the VIF Pool Manager you need to include:

  4. Once devstack is done and all services are up inside VM. Next steps are to configure the missing information at /etc/kuryr/kuryr.conf:

    • Configure worker VMs subnet:

      worker_nodes_subnet = <UNDERCLOUD_SUBNET_WORKER_NODES_UUID>
    • Configure binding section:

      driver = kuryr.lib.binding.drivers.vlan
      link_iface = <VM interface name eg. eth0>
    • Restart kuryr-k8s-controller:

      $ sudo systemctl restart devstack@kuryr-kubernetes.service
    • Restart kuryr-daemon:

      $ sudo systemctl restart devstack@kuryr-daemon.service

Now launch pods using kubectl, Undercloud Neutron will serve the networking.