Distributed Wamp Router

Multiple Wamp Router forming a cluster, allowing clients to subscribe and publish to any of them

based on the simple router example

tl;dr

distribute Wamp router across two hosts: first-machine and second-machine

first-machine$ make

first-machine$ ./_rel/dist_wamp_router/bin/dist_wamp_router console

# now the same on second-machine

Then point your browser to http://first-machine:8080 and http://second-machine:8080, connect to the default realm, subscribe to the same topic on both machines, then publish something on that topic and watch that event appear on the other machine tadah

Also have a look at the Wamp specification for further informations on the possibilities.

Packaging

• Run make requires a recent erlang. We suggest downloading it from here
• Ensure you have rebar and relx installed and in your path. If not:

  wget https://raw.githubusercontent.com/wiki/rebar/rebar/rebar
  chmod +x rebar
  wget https://github.com/erlware/relx/releases/download/v1.0.2/relx
  chmod +x relx
  
  export PATH=$PATH:$(pwd)

• Build an RPM with ./build_rpm_with_fpm.sh this requires fpm (gem install fpm).

Configuration

• /etc/sysconfig/dist-wamp-router

  USER=username-to-run-as

Run in docker

cd dist-yadtbroadcaster
git clone https://github.com/arnehilmann/baseimage
./init-devenv
export DOCKER_IMAGE=arne/riak
baseimage/start-dns
baseimage/start-node 1
baseimage/start-node 2
[...]
ssh node1.node.consul
cd /docker
_rel/dist_wamp_router/bin/dist_wamp_router attach

TODOS

• disable ip checking when using ssh (annoying because the ip changes with every restart of a container)

• configure localhost in /etc/resolv.conf permanently (read: resolvconf does not remove 'localhost' as nameserver)