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Clarify what kubenet does and does not do

reviewable/pr1341/r1
Bryan Boreham 2016-09-28 16:30:41 +01:00 committed by Bryan Boreham
parent a0e1efdad0
commit c8abb1c5f8
1 changed files with 5 additions and 1 deletions
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docs/admin/network-plugins.md
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@ -40,7 +40,11 @@ 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 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.
Kubenet is intended to be a very basic, simple network plugin, on Linux only. It does not, of itself, implement more advanced features like cross-node networking or network policy. It is typically used together with a cloud provider that sets up routing rules for communication between nodes, or in single-node environments.
Kubenet 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: