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:
To install OpenStack services run devstack with
devstack/local.conf.pod-in-vm.undercloud.sample. Ensure that “trunk” service plugin is enabled in
[DEFAULT] service_plugins = neutron.services.l3_router.l3_router_plugin.L3RouterPlugin,neutron.services.trunk.plugin.TrunkPlugin
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:
Once devstack is done and all services are up inside VM. Next steps are to configure the missing information at
Configure worker VMs subnet:
[pod_vif_nested] worker_nodes_subnets = <UNDERCLOUD_SUBNET_WORKER_NODES_UUID>
Configure binding section:
[binding] driver = kuryr.lib.binding.drivers.vlan link_iface = <VM interface name eg. eth0>
$ sudo systemctl restart email@example.com
$ sudo systemctl restart firstname.lastname@example.org
Now launch pods using kubectl, Undercloud Neutron will serve the networking.