Multicluster plugin

The Multicluster plugin allows to simulate multiple Kubernetes cluster deployed across internet, and emulate latency, packet drops and bandwith constraints.

Usage

 ./multicluster -h
Simulate multicluster deployments using KIND clusters

Usage:
  multicluster [command]

Available Commands:
  create      Create a multicluster cluster
  delete      Delete the multicluster cluster

Create

The plugin define the cluster topology using a configuration file like this:

clusters:
  cluster-us: 
    nodes: 2
    nodeSubnet: "172.88.0.0/16"
    podSubnet: "10.196.0.0/16"
    serviceSubnet: "10.96.0.0/16"
  cluster-eu:
    nodes: 2
    nodeSubnet: "172.89.0.0/16"
    podSubnet: "10.197.0.0/16"
    serviceSubnet: "10.97.0.0/16"

You can create a multicluster deployment:

 ./multizone create --config config.yaml
Creating cluster "kind" ...
WARNING: Overriding docker network due to KIND_EXPERIMENTAL_DOCKER_NETWORK
WARNING: Here be dragons! This is not supported currently.
 ✓ Ensuring node image (aojea/kindnode:1.22rc) 🖼
 ✓ Preparing nodes 📦 📦 📦  

That will create 2 KIND clusters in its independent networks. It will also create a container that will act as gateway for those networks. This container is a WAN emulator, that will allow the user to specify the latency, packet drops and bandwith for each fo the clusters.

docker ps
CONTAINER ID   IMAGE                        COMMAND                  CREATED         STATUS         PORTS                       NAMES
330fcede9fb3   kindest/node:v1.20.2         "/usr/local/bin/entr…"   3 seconds ago   Up 1 second    127.0.0.1:39959->6443/tcp   cluster-eu-control-plane
5db3e1cd057a   kindest/node:v1.20.2         "/usr/local/bin/entr…"   3 seconds ago   Up 1 second                                cluster-eu-worker
0279df468048   quay.io/aojea/wanem:latest   "sleep infinity"         4 seconds ago   Up 4 seconds                               wan-kind

Delete

Delete removes all the resources created.

./multicluser delete --config config.yml