github.com/azure/fleet-networking

Fleet-networking

Fleet-networking provides following capabilities

• expose a Kubernetes service from a single cluster
• create a multi-cluster service that exposes endpoints from a number of Kubernetes clusters

Architecture

The fleet networking consists of the following components:

• hub-net-controller-manager running in the hub cluster
• mcs-controller-manager running in the member clusters
• member-net-controller-manager running in the member clusters

The Controller Manager runs the various controllers built up on controller-runtime by watching fleet networking resources.

Constraints

• Assuming member clusters are Kubernetes clusters on the same virtual networking,
  • Clusters on virtual network peers (virtual networks connected within same region)
  • Clusters on global virtual network peers (virtual networks connected across regions).
  • Non-overlapping pod CIDRs for all the above.
• Each member cluster could talk with hub cluster.

Concepts

Fleet: A multi cluster solution that users use to manage Kubernetes clusters.

Hub cluster: An Kubernetes cluster that hosts the control plane of the fleet.

Member cluster: A Kubernetes cluster that is part of the fleet.

Fleet-system Namespace: A reserved namespace in all clusters for running Fleet networking controllers and putting internal resources.

Reserved member cluster namespace in the hub cluster: A reserved namespace in the hub cluster where a member cluster can access to communicate with the hub cluster.

Quick Start

This document features a tutorial that explains how to set up and make use of the networking capabilities provided by Fleet.

Contributing

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