Playbook simplified by moving to rabbitmq 3.x instead of 2.x

playbooks/roles/rabbitmq/tasks/main.yml

 ---
-# Tasks related to setting up the rabbitmq machines
-- name: create a rabbitmq group
-  group: name=rabbitmq
+# It is recommended that this role be played with serial set to 1 because
+# There is a bug with initializing multiple nodes in the HA cluster at once
+# http://rabbitmq.1065348.n5.nabble.com/Rabbitmq-boot-failure-with-quot-tables-not-present-quot-td24494.html
 
-- name: create a rabbitmq user
-  user: name=rabbitmq group=rabbitmq
+- name: trust rabbit repository
+  apt_key: url={{rabbitmq_apt_key}} state=present
+
+- name: add rabbit repository
+  apt_repository: repo="{{rabbitmq_repository}}" state=present
+
+- name: install rabbitmq
+  apt: pkg={{rabbitmq_pkg}} state=present
+
+- name: stop rabbit cluster
+  service: name=rabbitmq-server state=stopped
 
 # Defaulting to /var/lib/rabbitmq
-- name: crate cookie directory
+- name: create cookie directory
   file: path={{rabbitmq_cookie_dir}} owner=rabbitmq group=rabbitmq mode=0755 state=directory
 
-- name: add rabbitmq erlang cookie
-  template: src=erlang.cookie.j2 dest=/home/rabbitmq/.erlang.cookie owner=rabbitmq group=rabbitmq mode=0400
 
 - name: add rabbitmq erlang cookie
   template: src=erlang.cookie.j2 dest={{rabbitmq_cookie_location}} owner=rabbitmq group=rabbitmq mode=0400
+  register: erlang_cookie
 
 # Defaulting to /etc/rabbitmq
-- name: create rabbitmq directory
+- name: create rabbitmq config directory
   file: path={{rabbitmq_config_dir}} owner=root group=root mode=0755 state=directory
  
 - name: add rabbitmq environment configuration
@@ -25,45 +33,22 @@
 
 - name: add rabbitmq cluster configuration
   template: src=rabbitmq.config.j2 dest={{rabbitmq_config_dir}}/rabbitmq.config owner=root group=root mode=0644
+  register: cluster_configuration
 
-- name: install rabbitmq
-  apt: pkg={{rabbitmq_pkg}} state=present
-
-- name: stop rabbit cluster
-  service: name="rabbitmq-server" state=stopped
-
-# For some reason this needs to be run from the shell.  Running it via the 
-# service module produces inconsintent results.
-- name: kill rabbit nodes
-  shell: executable=/bin/bash killall epmd beam
-  ignore_errors: True
-  tags:
-  - testit
+# When rabbitmq starts up it creates a folder of metadata at '/var/lib/rabbitmq/mnesia'.
+# This folder should be deleted before clustering is setup because it retains data
+# that can conflict with the clustering information.
+- name: remove mnesia configuration
+  file: path={{rabbitmq_mnesia_folder}} state=absent
+  when: erlang_cookie.changed or cluster_configuration.changed
 
 - name: start rabbit nodes
-  shell: executable=/bin/bash service rabbitmq-server start
-  tags:
-  - testit
+  service: name=rabbitmq-server state=restarted
 
 - name: remove guest user
   rabbitmq_user: user="guest" state=absent
-  ignore_errors: True
 
 - name: add admin users
   rabbitmq_user: user='{{item.name}}' password='{{item.password}}' tags="administrator" state=present 
   with_items: rabbitmq_auth_config.admins
   when: "'admins' in rabbitmq_auth_config"
-  ignore_errors: True
-
-# Verify user changes
-- name: get rabbit user list
-  command: rabbitmqctl list_users
-  register: rabbitmq_users
-
-- name: check all expected users exist.
-  command: rabbitmqctl list_user_permissions {{item.name}}
-  with_items: rabbitmq_auth_config.admins
-
-- name: make sure guest has been removed
-  fail: "Guest user still has an account."
-  when: "'guest' in rabbitmq_users"

playbooks/roles/rabbitmq/templates/rabbitmq.config.j2

@@ -13,4 +13,4 @@
 {%- endfor -%}
 
 [{rabbit,
-  [{cluster_nodes, ['{{ hosts|join("\',\'") }}']}]}].
+  [{cluster_nodes, {['{{ hosts|join("\',\'") }}'], disc}}]}].

playbooks/roles/rabbitmq/vars/main.yml

 #Varibables for rabbitmq
 ---
+rabbitmq_apt_key: "http://www.rabbitmq.com/rabbitmq-signing-key-public.asc"
+rabbitmq_repository: "deb http://www.rabbitmq.com/debian/ testing main"
 rabbitmq_pkg: "rabbitmq-server"
 
 rabbitmq_config_dir: "/etc/rabbitmq"
 rabbitmq_cookie_dir: "/var/lib/rabbitmq"
 rabbitmq_cookie_location: "{{rabbitmq_cookie_dir}}/.erlang.cookie"
 
+rabbitmq_mnesia_folder: "{{rabbitmq_cookie_dir}}/mnesia"
+
 rabbitmq_port: 5672
 
 rabbitmq_auth_config:
-  erlang_cookie: "YK+MSzXQskeVz6ap1P5zfg=="
+  erlang_cookie: "CHANGE ME"