PhoenixLibcluster

To start your Phoenix app:

• Install dependencies with mix deps.get
• Create and migrate your database with mix ecto.create && mix ecto.migrate
• Install Node.js dependencies with npm install
• Start Phoenix endpoint with mix phoenix.server

Now you can visit localhost:4000 from your browser.

Run clustering Locally

To make this work, local dev servers need to be started in "named" mode. For example, to start 2 named nodes on the same machine:

PORT=4000 elixir --name [email protected] -S mix phoenix.server &
PORT=4001 elixir --name [email protected] -S mix phoenix.server

In development, the topology is fixed and uses the built-in erlang discovery.

Run on Kubernetes

• Install minikube (https://kubernetes.io/docs/tutorials/stateless-application/hello-minikube/)

• Create a Docker container image

  eval $(minikube docker-env)
  docker build -t libcluster:v1 .
  

• Create Kubernetes deployment file kubectl create -f k8s.yaml

• See Pods kubectl get pods

• Run the Service minikube service phoenix-libcluster

References

http://learnyousomeerlang.com/distribunomicon

https://github.com/bitwalker/libcluster

http://bitwalker.org/posts/2016-08-04-clustering-in-kubernetes/

https://github.com/NetComposer/nkcluster

http://erlangonxen.org/more/clustering

https://dockyard.com/blog/2016/01/28/running-elixir-and-phoenix-projects-on-a-cluster-of-nodes