Mastering Kubernetes - Fourth Edition by Gigi Sayfan

Author:Gigi Sayfan
Language: eng
Format: epub
Publisher: Packt
Published: 2023-11-15T00:00:00+00:00

Kubenet

Back to Kubernetes. Kubenet is a network plugin. It’s very rudimentary: it establishes a Linux bridge named cbr0 and creates a veth interface for each pod. This is commonly used by cloud providers to configure routing rules for communication between nodes, or in single-node environments. The veth pair connects each pod to its host node using an IP address from the host’s IP address’ range.

Requirements

The Kubenet plugin has the following requirements:

The node must be assigned a subnet to allocate IP addresses to its pods

The standard CNI bridge, lo, and host-local plugins must be installed at version 0.2.0 or higher

The kubelet must be executed with the --network-plugin=kubenet flag

The kubelet must be executed with the --non-masquerade-cidr=<clusterCidr> flag

The kubelet must be run with --pod-cidr or the kube-controller-manager must be run with --allocate-node-cidrs=true --cluster-cidr=<cidr>

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