A naive redis-backed libcluster dynamic cluster implementation.

To start redis and 3 nodes, run in shell:

$> docker-compose up --scale node=3

You should see messages like connected to node [email protected]

If you want an intereactive shell (iex), after starting redis and the nodes, run:

$> docker-compose run --rm node

And listing all the nodes:

iex> Node.list()
[:"[email protected]", :"[email protected]"]

There you can start a globally registered GenServer:

iex> ClusterOnRedis.Printer.start_link()
{:ok, #PID<0.193.0>}

Starting another node and running that again should result in:

iex> ClusterOnRedis.Printer.start_link()
{:error, {:already_started, #PID<19544.193.0>}}

You can call that GenServer from any node:

iex> GenServer.call({:global, :printer}, {:print, "Hello"})
:ok