Package exec scans and loads networking plugins that are installed under /usr/libexec/kubernetes/kubelet-plugins/net/exec/ The layout convention for a plugin is: plugin-name/ (plugins have to be directories first) plugin-name/plugin-name (executable that will be called out, see Vendoring Note for more nuances) plugin-name/<other-files> where, 'executable' has the following requirements: - should have exec permissions - should give non-zero exit code on failure, and zero on success - the arguments will be <action> <pod_namespace> <pod_name> <docker_id_of_infra_container> whereupon, <action> will be one of: - init, called when the kubelet loads the plugin - setup, called after the infra container of a pod is created, but before other containers of the pod are created - teardown, called before the pod infra container is killed - status, called at regular intervals and is supposed to return a json formatted output indicating the pod's IPAddress(v4/v6).

InitNetworkPlugin inits the plugin that matches networkPluginName.

Called when the node's Pod CIDR is known when using the controller manager's --allocate-node-cidrs=true option.

PodNetworkStatus stores the network status of a pod (currently just the primary IP address) This struct represents version "v1beta1".

Host is an interface that plugins can use to access the kubelet.

Plugin is an interface to network plugins for the kubelet.