playbook.yml

---
- hosts: 'all'
  remote_user: 'ubuntu'
  become: yes
  become_method: sudo

  vars:
    ruby_version: '2.3.1'
    user: 'deployer'
    home: '/home/{{ user }}'
    rbenv_root: '{{ home }}/.rbenv'
    name: 'posts'
    application: '{{ home }}/applications/{{ name }}'

  tasks:
    - name: 'apt | update'
      action: 'apt update_cache=yes'

    - name: 'apt | install dependencies'
      action: 'apt pkg={{ item }}'
      with_items:
        - 'build-essential'
        - 'libssl-dev'
        - 'libyaml-dev'
        - 'libreadline6-dev'
        - 'zlib1g-dev'
        - 'libcurl4-openssl-dev'
        - 'git'
        - 'nginx'
        - 'redis-server'
        - 'postgresql'
        - 'postgresql-contrib'
        - 'libpq-dev'
        - 'imagemagick'
        - 'libmagickwand-dev'
        - 'nodejs'
        - 'htop'

    - name: 'account | create'
      user: 'name={{ user }} shell=/bin/bash generate_ssh_key=yes'

    - name: 'rbenv | clone repo'
      git: 'repo=git://github.com/sstephenson/rbenv.git dest={{ rbenv_root }} accept_hostkey=yes'

    - name: 'rbenv | check ruby-build installed'
      command: 'test -x {{ rbenv_root }}/plugins/ruby-build'
      register: 'plugin_installed'
      ignore_errors: yes

    - name: 'rbenv | add bin to path'
      shell: echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> {{ home }}/.bashrc
      when: 'plugin_installed|failed'

    - name: 'rbenv | init'
      shell: echo 'eval "$(rbenv init -)"' >> {{ home }}/.bashrc
      when: 'plugin_installed|failed'

    - name: 'rbenv | clone ruby-build repo'
      git: 'repo=git://github.com/sstephenson/ruby-build.git dest={{ rbenv_root }}/plugins/ruby-build accept_hostkey=yes'
      when: 'plugin_installed|failed'

    - name: 'rbenv | check ruby {{ ruby_version }} installed'
      shell: 'RBENV_ROOT={{ rbenv_root }} PATH="$RBENV_ROOT/bin:$PATH" rbenv versions | grep {{ ruby_version }}'
      register: 'ruby_installed'
      ignore_errors: yes

    - name: 'rbenv | install ruby {{ ruby_version }}'
      shell: 'RBENV_ROOT={{ rbenv_root }} PATH="$RBENV_ROOT/bin:$PATH" rbenv install {{ ruby_version }}'
      when: 'ruby_installed|failed'

    - name: 'rbenv | set global ruby {{ ruby_version }}'
      shell: 'RBENV_ROOT={{ rbenv_root }} PATH="$RBENV_ROOT/bin:$PATH" rbenv global {{ ruby_version }}'
      when: 'ruby_installed|failed'

    - name: 'rbenv | rehash'
      shell: 'RBENV_ROOT={{ rbenv_root }} PATH="$RBENV_ROOT/bin:$PATH" rbenv rehash'
      when: 'ruby_installed|failed'

    - name: 'rbenv | create .gemrc'
      lineinfile: 'dest={{ home }}/.gemrc owner={{ user }} group={{ user }} mode=0644 line="gem: --no-ri --no-rdoc" create=yes'
      when: 'ruby_installed|failed'

    - name: 'ruby | install bundler'
      shell: 'RBENV_ROOT={{ rbenv_root }} PATH="$RBENV_ROOT/bin:$PATH" rbenv exec gem install bundler'
      when: 'ruby_installed|failed'

    - name: 'rbenv | change owner'
      shell: 'chown -R {{ user }}:{{ user }} {{ rbenv_root }}'
      when: 'ruby_installed|failed'

    - name: 'postgresql | check user'
      shell: 'psql -U postgres -c "\copyright"'
      register: 'postgres_login'
      ignore_errors: yes

    - name: 'postgresql | set auth type'
      copy: 'src=configs/pg_hba.conf dest=/etc/postgresql/9.3/main/pg_hba.conf owner=postgres group=postgres mode=0644'
      when: 'postgres_login|failed'

    - name: 'postgresql | restart service'
      service: name=postgresql state=restarted
      when: 'postgres_login|failed'

    - name: 'postgresql | create shared directory'
      shell: 'mkdir -p {{ application }}/shared/config -m 775 && chown -R {{ user }}:{{ user }} {{ home }}/applications'
      when: 'postgres_login|failed'

    - name: 'postgresql | copy database.yml'
      template: 'src=configs/database.yml dest={{ application }}/shared/config/database.yml owner={{ user }} group={{ user }} mode=0644'
      when: 'postgres_login|failed'

    - name: 'postgresql | create database'
      shell: 'createdb -U postgres -O postgres -E UTF8 -l en_US.UTF-8 {{ name }}_production'
      when: 'postgres_login|failed'

    - name: 'nginx | check config'
      command: 'test -f /etc/nginx/sites-enabled/{{ name }}.conf'
      register: 'nginx_config_copied'
      ignore_errors: yes

    - name: 'nginx | createdir'
      shell: 'rm /etc/nginx/sites-enabled/default; mkdir -p etc/nginx/sites-enabled/'
      when: 'nginx_config_copied|failed'

    - name: 'nginx | copy config'
      template: 'src=configs/nginx.conf dest=/etc/nginx/sites-enabled/{{ name }}.conf owner=root group=root mode=0644'
      when: 'nginx_config_copied|failed'

    - name: 'nginx | restart service'
      service: name=nginx state=restarted
      when: 'nginx_config_copied|failed'

production.rb

set :branch, 'master'

server(
  'ec2-52-28-165-36.eu-central-1.compute.amazonaws.com',
  user: 'deployer',
  roles: %w(web app db)
)