diff --git a/docs/admin/network-plugins.md b/docs/admin/network-plugins.md index 4034c8a467..99f58dd246 100644 --- a/docs/admin/network-plugins.md +++ b/docs/admin/network-plugins.md @@ -1,6 +1,9 @@ --- --- +* TOC +{:toc} + __Disclaimer__: Network plugins are in alpha. Its contents will change rapidly. Network plugins in Kubernetes come in a few flavors: @@ -32,10 +35,11 @@ The CNI plugin is selected by passing Kubelet the `--network-plugin=cni` command ### kubenet -The Linux-only kubenet plugin provides functionality similar to the `--configure-cbr0` kubelet command-line option. It creates a Linux bridge named `cbr0` and creates a veth pair for each pod with the host end of each pair connected to `cbr0`. The pod end of the pair is assigned an IP address allocated from a range assigned to the node through either configuration or by the controller-manager. `cbr0` is assigned an MTU matching the smallest MTU of an enabled normal interface on the host. The kubenet plugin is currently mutually exclusive with, and will eventually replace, the --configure-cbr0 option. It is also currently incompatible with the flannel experimental overlay. +The Linux-only kubenet plugin provides functionality similar to the `--configure-cbr0` kubelet command-line option. It creates a Linux bridge named `cbr0` and creates a veth pair for each pod with the host end of each pair connected to `cbr0`. The pod end of the pair is assigned an IP address allocated from a range assigned to the node either through configuration or by the controller-manager. `cbr0` is assigned an MTU matching the smallest MTU of an enabled normal interface on the host. The kubenet plugin is currently mutually exclusive with, and will eventually replace, the --configure-cbr0 option. It is also currently incompatible with the flannel experimental overlay. The plugin requires a few things: + * The standard CNI `bridge` and `host-local` plugins to be placed in `/opt/cni/bin`. * Kubelet must be run with the `--network-plugin=kubenet` argument to enable the plugin * Kubelet must also be run with the `--reconcile-cidr` argument to ensure the IP subnet assigned to the node by configuration or the controller-manager is propagated to the plugin -* The node must be assigned an IP subnet through either the `--pod-cidr` kubelet command-line option or the `--allocate-node-cidrs=true --cluster-cidr=` controller-manager command-line options. \ No newline at end of file +* The node must be assigned an IP subnet through either the `--pod-cidr` kubelet command-line option or the `--allocate-node-cidrs=true --cluster-cidr=` controller-manager command-line options.