Multus is the open source project that enables Kubernetes pods to attach to multiple networks. It does this by acting as a ‘meta’ plug-in, which is a fancy name for a plug-in that calls other plug-ins. Plug-ins – provide network setup for different use cases (reference examples)
What is Kubernetes CNI package?
CNI (Container Network Interface), a Cloud Native Computing Foundation project, consists of a specification and libraries for writing plugins to configure network interfaces in Linux containers, along with a number of plugins. Kubernetes uses CNI as an interface between network providers and Kubernetes pod networking.
What is calico CNI?
Project Calico is an open-source project with an active development and user community. Calico Open Source was born out of this project and has grown to become the most widely adopted solution for Kubernetes networking and security, powering 1.5M+ nodes daily across 166 countries.
What is cbr0?
A linux bridge (called cbr0 ) is configured to exist on that subnet, and is passed to docker’s –bridge flag. Containers can reach each other and Nodes over the cbr0 bridge. Those IPs are all routable within the GCE project network.
How does Multus CNI work?
Multus is a bit like a stage director. It acts as a CNI manager by invoking or loading other CNI plug-ins and enabling the creation of multiple interfaces. The process to attach additional network interfaces to pods is a story in three acts: First, the setup: Create a CNI configuration as a custom resource.
What is CNI used for?
A CNI plugin is responsible for inserting a network interface into the container network namespace (e.g., one end of a virtual ethernet (veth) pair) and making any necessary changes on the host (e.g., attaching the other end of the veth into a bridge).
What is a CNI plugin?
What is CNI? A CNI plugin is responsible for inserting a network interface into the container network namespace (e.g., one end of a virtual ethernet (veth) pair) and making any necessary changes on the host (e.g., attaching the other end of the veth into a bridge).
What is the multus CNI plugin for Kubernetes?
Multus CNI enables attaching multiple network interfaces to pods in Kubernetes. Multus CNI is a container network interface (CNI) plugin for Kubernetes that enables attaching multiple network interfaces to pods.
Which is the default CNI config for multus?
Multus delegates to a single CNI network by default. If you have multiple CNI subordinates in your cluster then you can use the default-cni config on kubernetes-master to set the default: Multus will use this as the default network as well.
Which is the default network interface for multus?
The quickstart installation method for Multus requires that you have first installed a Kubernetes CNI plugin to serve as your pod-to-pod network, which we refer to as your “default network” (a network interface that every pod will be creatd with). Each network attachment created by Multus will be in addition to this default network interface.
Do you need persistent volume support for multus?
In order to deploy Multus, you will need a Kubernetes model in Juju, which requires persistent volume support to be enabled in your Charmed Kubernetes cluster. If your cluster includes any of the cloud integrator charms, then you should have persistent volume support already.
