First commit, a big dump.

README.rst

+Role Name
+=========
+
+A brief description of the role goes here.
+
+Requirements
+------------
+
+Any pre-requisites that may not be covered by Ansible itself or the role should be mentioned here. For instance, if the role uses the EC2 module, it may be a good idea to mention in this section that the boto package is required.
+
+Role Variables
+--------------
+
+::
+
+    consul_endpoint: # Endpoint (propably a load-balancer) to join the cluster,
+                     # if not defined then working in a single-node cluster.
+    consul_cluster_size: 3 # Number of nodes in the cluster, unless an endpoint
+                           # is not defined, then the cluster size is 1.
+    consul_mode: agent # Consul mode, either server or agent. If an endpoint is
+                       # not defined, defaults to server.
+
+The logic is: if the endpoint is defined then act according to the mode and join
+the cluster at the endpoint. If the endpoint is not defined then it's a single
+server cluster (probably a dev/ staging environment).
+
+A description of the settable variables for this role should go here, including any variables that are in defaults/main.yml, vars/main.yml, and any variables that can/should be set via parameters to the role. Any variables that are read from other roles and/or the global scope (ie. hostvars, group vars, etc.) should be mentioned here as well.
+
+Dependencies
+------------
+
+A list of other roles hosted on Galaxy should go here, plus any details in regards to parameters that may need to be set for other roles, or variables that are used from other roles.
+
+Example Playbook
+----------------
+
+Including an example of how to use your role (for instance, with variables passed in as parameters) is always nice for users too:
+
+    - hosts: servers
+      roles:
+         - { role: username.rolename, x: 42 }
+
+License
+-------
+
+MIT
+
+Author Information
+------------------
+
+An optional section for the role authors to include contact information, or a website (HTML is not allowed).
+
+To do
+-----
+
+- Move config to /etc/default/consul.
+- Handle Upstart and SystemD (maybe sysV also).
+- webui (https://consul.io/intro/getting-started/ui.html).
+- Test variables order of evaluation (maybe setting variables outside of the
+  role doesn't take effect as expected).
+- Set versions as vars (easier upgrade path).
+- Metrics.

defaults/main.yml

+---
+# defaults file for ansible-consul
+consul_endpoint: 
+consul_mode: '{{ "agent" if consul_endpoint is defined else "server" }}'
+consul_cluster_size: '{{ 3 if consul_endpoint is defined else 1 }}'

handlers/main.yml

+---
+# handlers file for ansible-consul
+
+- name: Reload Upstart
+  command: /sbin/initctl reload-configuration
+
+- name: Reload SystemD
+  command: /bin/systemctl daemon-reload
+
+- name: Restart Consul
+  service:
+      name: consul
+      state: restarted
+
+- name: Join Consul cluster
+  command: "/usr/local/bin/consul join {{ consul_lb }}"
+  when: consul_lb is defined

meta/main.yml

+---
+galaxy_info:
+  author: your name
+  description:
+  company: your company (optional)
+  # If the issue tracker for your role is not on github, uncomment the
+  # next line and provide a value
+  # issue_tracker_url: http://example.com/issue/tracker
+  # Some suggested licenses:
+  # - BSD (default)
+  # - MIT
+  # - GPLv2
+  # - GPLv3
+  # - Apache
+  # - CC-BY
+  license: license (GPLv2, CC-BY, etc)
+  min_ansible_version: 1.2
+  #
+  # Below are all platforms currently available. Just uncomment
+  # the ones that apply to your role. If you don't see your
+  # platform on this list, let us know and we'll get it added!
+  #
+  #platforms:
+  #- name: EL
+  #  versions:
+  #  - all
+  #  - 5
+  #  - 6
+  #  - 7
+  #- name: GenericUNIX
+  #  versions:
+  #  - all
+  #  - any
+  #- name: Fedora
+  #  versions:
+  #  - all
+  #  - 16
+  #  - 17
+  #  - 18
+  #  - 19
+  #  - 20
+  #  - 21
+  #  - 22
+  #- name: Windows
+  #  versions:
+  #  - all
+  #  - 2012R2
+  #- name: SmartOS
+  #  versions:
+  #  - all
+  #  - any
+  #- name: opensuse
+  #  versions:
+  #  - all
+  #  - 12.1
+  #  - 12.2
+  #  - 12.3
+  #  - 13.1
+  #  - 13.2
+  #- name: Amazon
+  #  versions:
+  #  - all
+  #  - 2013.03
+  #  - 2013.09
+  #- name: GenericBSD
+  #  versions:
+  #  - all
+  #  - any
+  #- name: FreeBSD
+  #  versions:
+  #  - all
+  #  - 8.0
+  #  - 8.1
+  #  - 8.2
+  #  - 8.3
+  #  - 8.4
+  #  - 9.0
+  #  - 9.1
+  #  - 9.1
+  #  - 9.2
+  #- name: Ubuntu
+  #  versions:
+  #  - all
+  #  - lucid
+  #  - maverick
+  #  - natty
+  #  - oneiric
+  #  - precise
+  #  - quantal
+  #  - raring
+  #  - saucy
+  #  - trusty
+  #  - utopic
+  #  - vivid
+  #- name: SLES
+  #  versions:
+  #  - all
+  #  - 10SP3
+  #  - 10SP4
+  #  - 11
+  #  - 11SP1
+  #  - 11SP2
+  #  - 11SP3
+  #- name: GenericLinux
+  #  versions:
+  #  - all
+  #  - any
+  #- name: Debian
+  #  versions:
+  #  - all
+  #  - etch
+  #  - jessie
+  #  - lenny
+  #  - squeeze
+  #  - wheezy
+  #
+  # Below are all categories currently available. Just as with
+  # the platforms above, uncomment those that apply to your role.
+  #
+  #categories:
+  #- cloud
+  #- cloud:ec2
+  #- cloud:gce
+  #- cloud:rax
+  #- clustering
+  #- database
+  #- database:nosql
+  #- database:sql
+  #- development
+  #- monitoring
+  #- networking
+  #- packaging
+  #- system
+  #- web
+dependencies: []
+#    - role: StatsD
+#      tags: StatsD
+#    - role: Exim
+#      tags: Exim
+#      when: ansible_os_family == 'Debian'

tasks/main.yml

+---
+# tasks file for ansible-consul
+
+- name: apt install prerequisites
+  apt:
+      name: unzip
+      state: present
+      update_cache: yes
+      cache_valid_time: 3600
+
+- name: Create user
+  user:
+      name: consul
+      createhome: yes
+      home: /var/lib/consul
+      shell: /bin/false
+      system: yes
+      state: present
+
+- name: Add email alias
+  lineinfile:
+      dest: /etc/aliases
+      line: 'consul: root'
+      regexp: '^consul:'
+      create: yes
+
+- name: Create configuration directory
+  file:
+      path: /etc/consul.d
+      owner: root
+      group: root
+      mode: '0755'
+      state: directory
+
+- name: Get tarball
+  register: get_consul
+  get_url:
+      url: https://dl.bintray.com/mitchellh/consul/0.5.2_linux_amd64.zip
+      dest: /root/consul.zip
+      owner: root
+      group: root
+      mode: '0644'
+
+- name: Unpack tarball
+  when: get_consul.changed
+  notify:
+      - Restart Consul
+  unarchive:
+      copy: no
+      dest: /usr/local/bin
+      group: root
+      owner: root
+      mode: '0755'
+      src: /root/consul.zip
+
+- name: Get python-consul
+  pip:
+      name: python-consul
+      state: present
+
+- name: Add configuration
+  template:
+      src: '{{ item.src }}'
+      dest: '{{ item.dest }}'
+      owner: root
+      group: root
+      mode: '0644'
+  with_items:
+      - src: consul.conf.j2
+        dest: /etc/init/consul.conf
+      - src: consul.json.j2
+        dest: /etc/consul.d/consul.json
+  notify:
+      - Restart Consul
+      - Join Consul cluster
+
+- name: Start Consul
+  service:
+      name: consul
+      state: started
+
+- name: Get Consul Template tarball
+  register: get_consul_template
+  get_url:
+      url: https://github.com/hashicorp/consul-template/releases/download/v0.10.0/consul-template_0.10.0_linux_amd64.tar.gz
+      dest: /root/consul-template.tar.gz
+      owner: root
+      group: root
+      mode: '0644'
+
+- name: Unpack Consul Template tarball
+  when: get_consul_template.changed
+  register: consul_template_unarchive
+  unarchive:
+      copy: no
+      dest: /root
+      group: root
+      owner: root
+      src: /root/consul-template.tar.gz
+
+- name: Copy Consul template binary
+  when: consul_template_unarchive.changed|default('false')
+  command: cp /root/consul-template_0.10.0_linux_amd64/consul-template /usr/local/bin

templates/consul

+limit nofile 5000 10000
+env GOMAXPROCS=5

templates/consul.conf.j2

+author "Nimrod Adar <nimrod.adar@wiser.com>"
+description "Consul"
+
+start on runlevel [2345]
+stop on runlevel [!2345]
+
+setgid consul
+setuid consul
+limit nofile 5000 10000
+respawn
+respawn limit 10 10
+env GOMAXPROCS=5
+exec /usr/local/bin/consul agent -config-dir /etc/consul.d

templates/consul.json.j2

+{{ consul_config | to_nice_json }}

vars/main.yml

+---
+# vars file for ansible-consul
+consul_config:
+  enable_syslog: True
+  data_dir: /var/lib/consul
+  datacenter: '{{ ec2_region|default(omit) }}'
+  start_join: '{{ consul_endpoint|default(omit) }}'
+  server: '{{ consul_mode == "server" }}'
+  bootstrap_expect: '{{ consul_cluster_size if consul_mode == "server" else omit }}'
+  bind_addr: '{{ ansible_default_ipv4.address if consul_mode == "server" else omit }}'
+  #statsd_addr: "127.0.0.1"