vars.yml:
---
project_name: myproject
project_root: /var/projects/myproject
project_repo: git@bitbucket.org:username/myproject.git
system_packages:
  - build-essential
  - git
  - libevent-dev
  - nginx
  - postgresql
  - postgresql-server-dev-all
  - python-dev
  - python-setuptools
  - redis-server
  - postfix
  - yui-compressor
python_packages:
  - pip
  - virtualenv
initfiles:
  - backend
  - gunicorn


deploy.yml:
---
- hosts: servers
  vars_files:
    - vars.yml
  gather_facts: false
  sudo: true
  sudo_user: myproject

  tasks:
  - name: Pull sources from the repository.
    git: repo=${project_repo} dest=${project_root}/code/ version=${branch}
    only_if: "$vm == 0"
    notify:
      - restart backend

  - name: Upload configuration.
    copy: src=webapp_settings/local_settings.${nickname}.py dest=${project_root}/code/webapp/local_settings.py
    only_if: "$vm == 0"

  - name: Upgrade the virtualenv.
    pip: requirements=${project_root}/code/requirements.txt virtualenv=${project_root}/env/

  - name: Sync Django database.
    shell: ${project_root}/env/bin/python ${project_root}/code/webapp/manage.py syncdb --migrate --noinput

  - name: Generate Django media.
    shell: ${project_root}/env/bin/python ${project_root}/code/webapp/manage.py generatemedia

  handlers:
    - include: handlers.yml

handlers.yml:
---
- name: restart nginx
  service: name=nginx state=restarted
  sudo_user: root

- name: reload nginx
  service: name=nginx state=reloaded
  sudo_user: root

- name: restart backend
  action: service name=${project_name}_backend state=restarted
  sudo_user: root

provision.yml:
---
- hosts: servers
  vars_files:
    - vars.yml
  gather_facts: false
  sudo: true

  tasks:
  - name: Create the project directory.
    file: state=directory path=${project_root}

  - name: Create user.
    user: home=${project_root}/home/ name=${project_name} state=present

  - name: Update the project directory.
    file: group=${project_name} owner=${project_name} mode=755 state=directory path=${project_root}

  - name: Create the code directory.
    file: group=${project_name} owner=${project_name} mode=755 state=directory path=${project_root}/code/

  - name: Install required system packages.
    apt: pkg=${item} state=installed update-cache=yes
    with_items: ${system_packages}

  - name: Install required Python packages.
    easy_install: name=${item}
    with_items: ${python_packages}

  - name: Mount code folder.
    mount: fstype=vboxsf opts=uid=${project_name},gid=${project_name} name=${project_root}/code/ src=${project_name} state=mounted
    only_if: "$vm == 1"

  - name: Create the SSH directory.
    file: state=directory path=${project_root}/home/.ssh/
    only_if: "$vm == 0"

  - name: Upload SSH known hosts.
    copy: src=known_hosts dest=${project_root}/home/.ssh/known_hosts mode=0600
    only_if: "$vm == 0"

  - name: Upload SSH key.
    copy: src=key dest=${project_root}/home/.ssh/id_rsa mode=0600
    only_if: "$vm == 0"

  - name: Create the SSL directory.
    file: state=directory path=${project_root}/home/ssl/

  - name: Upload SSL private key.
    copy: src=files/ssl/myproject.pem dest=${project_root}/home/ssl/myproject.pem

  - name: Upload SSH public key.
    copy: src=files/ssl/myproject.key.encrypted dest=${project_root}/home/ssl/myproject.key

  - name: Change permissions.
    shell: chown -R ${project_name}:${project_name} ${project_root}

  - name: Install nginx configuration file.
    copy: src=files/conf/nginx.conf dest=/etc/nginx/sites-enabled/myproject
    notify: restart nginx

  - name: Install init scripts.
    copy: src=files/init/${item}.conf dest=/etc/init/myproject_${item}.conf
    with_items: ${initfiles}

  - name: Create database.
    shell: ${project_root}/env/bin/python ${project_root}/code/webapp/manage.py sqlcreate --router=default | sudo -u postgres psql

  handlers:
    - include: handlers.yml

- include: deploy.yml

- hosts: servers
  vars_files:
    - vars.yml
  gather_facts: false
  sudo: true

  tasks:
  - name: Restart services.
    service: name=myproject_${item} state=restarted
    with_items: ${initfiles}

hosts:
[remote:children]
production
staging

[servers:children]
production
staging
local

[production]
www.myproject.com: nickname=production vm=0 branch=master

[staging]
staging.myproject.com nickname=staging vm=0 branch=develop

[local]
local.myproject.com nickname=local vm=1 branch=develop