Mina Deploy Ubuntu 17.10-From Scratch-Rails-Ruby-Mysql-Nginx-Puma and all possible option

deploy.rb

require 'mina/rails'
require 'mina/git'
require 'mina/puma'
require 'mina/rvm'
require 'yaml'

set :user, 'deploy'
set :port, '22'
set :forward_agent, true
set :term, :system
set :execution_mode, :system

set :ruby_version, "#{File.readlines(File.join(__dir__, '..', '.ruby-version')).first.strip}"
set :gemset, "#{File.readlines(File.join(__dir__, '..', '.ruby-gemset')).first.strip}"
set :ssl_enabled, false

set :application_name, 'app_name'
set :deploy_to, 'deploy_to_path'
set :repository, "https://GITLAB_USERNAME:GITLAB_PASSWORD@gitlab.com/URL.git"
set :branch, 'master'

set :shared_dirs, fetch(:shared_dirs, []).push(
    'log',
    'tmp/pids',
    'tmp/sockets',
    'public/uploads'
)
set :shared_files, fetch(:shared_files, []).push(
    'config/database.yml',
    'config/cable.yml',
    'config/secrets.yml',
    'config/puma.rb'
)

##########################################################################
#
# TODO: Something meaning full should be here.
#
##########################################################################

task :remote_environment do
  unless ENV['env']
    print_error "Task 'test' needs a valid environment name as an argument. e.g. mina test env=trunk"
    exit
  end
  unless ['staging', 'production'].include? ENV['env'].to_s
    puts "Task 'test' needs a valid environment name as an argument. e.g. mina test env=trunk"
    exit 1
  end

  case ENV['env']
    when 'production'
      set :rails_env, 'production'
      set :domain, 'PRODUCTION_IP_ADDRESS'
      set :db_password, 'MYSQL_DB_PASSWROD'
      set :db_name, 'MYSQL_DB_NAME'
    when 'staging'
      set :rails_env, 'staging'
      set :domain, 'PRODUCTION_IP_ADDRESS'
      set :db_password, 'MYSQL_DB_PASSWROD'
      set :db_name, 'MYSQL_DB_NAME'
    else
      set :domain, 'localhost'
  end
end

##########################################################################
#
# Tasks below are related to code-deploy only. just clone/migrate/
# assets precompile assuming all dependencies are installed and
# in-place and configured.
#
##########################################################################

desc 'Deploys the current version to the server.'
task :deploy => :remote_environment do
  invoke :'rvm:use', "#{fetch(:ruby_version)}@#{fetch(:gemset)}"
  deploy do
    comment "Deploying #{fetch(:application_name)} to #{fetch(:domain)}:#{fetch(:deploy_to)}"
    invoke :'git:clone'
    invoke :'deploy:link_shared_paths'
    # invoke :'rvm:load_env_vars' #FIXME: Why this is commented.
    invoke :'bundle:install'
    invoke :'rails:db_migrate'
    command %{#{fetch(:rails)} db:seed}
    invoke :'rails:assets_precompile'
    invoke :'deploy:cleanup'
    on :launch do
      invoke :'puma:phased_restart'
    end
  end
end

##########################################################################
#
# Tasks below are related to setup, sym-linking, configurations once
# install done.
#
##########################################################################

desc 'Setup everything symlinking/yamls/database/nginx'
task :'setup:all' => :remote_environment do
  comment %{ Setup folder structure on server }
  invoke :setup
  comment %{ defining VirtualHost configurations for nginx }
  invoke :'setup:nginx'
end

task :setup do
  command %{ mkdir -p #{fetch(:deploy_to)}/shared/log }
  command %{ chmod g+rx,u+rwx #{fetch(:deploy_to)}/shared/log }

  command %{mkdir -p #{fetch(:deploy_to)}/shared/config}
  command %{chmod g+rx,u+rwx #{fetch(:deploy_to)}/shared/config}

  command %{touch "#{fetch(:deploy_to)}/shared/config/database.yml"}
  invoke :'setup:config:database_yml'

  command %{touch "#{fetch(:deploy_to)}/shared/config/cable.yml"}
  invoke :'setup:config:cable_yml'

  command %{touch "#{fetch(:deploy_to)}/shared/config/secrets.yml"}
  invoke :'setup:config:secrets_yml'

  command %{mkdir -p "#{fetch(:deploy_to)}/shared/tmp/sockets" }
  command %{chmod g+rx,u+rwx "#{fetch(:deploy_to)}/shared/tmp/sockets" }

  command %{mkdir -p "#{fetch(:deploy_to)}/shared/tmp/pids" }
  command %{chmod g+rx,u+rwx "#{fetch(:deploy_to)}/shared/tmp/pids" }

  command %{touch "#{fetch(:deploy_to)}/shared/config/puma.rb"}
  invoke :'setup:config:puma'

end

desc 'Populate database.yml'
task :'setup:config:database_yml' do
  database_yml = <<-DATABASE.dedent
#{fetch(:rails_env)}:
      adapter: mysql2
      pool: 15
      username: #{fetch(:db_user_name)}
      password: #{fetch(:db_password)}
      encoding: utf8mb4
      collation: utf8mb4_unicode_ci
      reconnect: true 
      reaping_frequency: 25
      database: #{fetch(:db_name)}
      host: localhost
  DATABASE
  comment %{ Populating database.yml }
  command %{ echo '#{database_yml}' > #{fetch(:deploy_to)}/shared/config/database.yml }
  comment %{ database.yml populated. }
end

desc 'Populate cable.yml'
task :'setup:config:cable_yml' do
  channel_prefix = 'HoneycrispApple-web_production' #STDIN.gets.chomp
  cable_yml = <<-CABLE.dedent
#{fetch(:rails_env)}:
      adapter: redis
      url: redis://localhost:6379/1
      channel_prefix: #{channel_prefix}
  CABLE
  comment %{ Populating cable.yml }
  command %{ echo '#{cable_yml}' > #{fetch(:deploy_to)}/shared/config/cable.yml }
  comment %{ cable.yml populated. }
end

desc 'Populate secrets.yml'
task :'setup:config:secrets_yml' do
  secret_key_base = 'SECRETS_KEYS' #STDIN.gets.chomp
  secrets_yml = <<-SECRETS.dedent
#{fetch(:rails_env)}:
      secret_key_base: #{secret_key_base}
  SECRETS
  comment %{ Populating secrets.yml }
  command %{ echo '#{secrets_yml}' > #{fetch(:deploy_to)}/shared/config/secrets.yml }
  comment %{ secrets.yml populated.}
end

desc 'Populate Puma.rb'
task :'setup:config:puma' do
  puma_rb = <<-PUMA.dedent
environment "#{fetch(:rails_env)}"

bind  "unix://#{fetch(:deploy_to)}/shared/tmp/sockets/puma.sock"
pidfile "#{fetch(:deploy_to)}/shared/tmp/pids/puma.pid"
state_path "#{fetch(:deploy_to)}/shared/tmp/sockets/puma.state"
directory "#{fetch(:deploy_to)}/current"

workers 2
threads 1,2

daemonize true

activate_control_app
prune_bundler

  PUMA
  comment %{ Populating secrets.yml }
  command %{ echo '#{puma_rb}' > #{fetch(:deploy_to)}/shared/config/puma.rb }
  comment %{ puma.rb populated.}
end

desc "TODO: Something should be here"
task :'setup:nginx' do
  if fetch(:ssl_enabled)
    #Todo: SSL configurations
  else
    vhost_content = <<-HOSTFILE.dedent
    upstream puma {
      server unix://#{fetch(:deploy_to)}/shared/tmp/sockets/puma.sock fail_timeout=0;
    }
    
    server {
      listen 80;
      listen [::]:80;
    
      root #{fetch(:deploy_to)}/current/public;
    
      location ~ ^/assets/ {
        expires max;
        gzip_static on;
        gzip_vary on;
        add_header Cache-Control public;
        break;
      }
    
      location / {
        proxy_pass http://puma;
        proxy_set_header Host \$host;
        proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
      }
    
      location ~ ^/(500|404|422).html {
        root #{fetch(:deploy_to)}/current/public;
      }
    
      error_page 500 502 503 504 /500.html;
      error_page 404 /404.html;
      error_page 422 /422.html;
    
      client_max_body_size 4G;
      keepalive_timeout 10;
    }
    HOSTFILE
  end

  command %{ echo "#{vhost_content}" > #{fetch(:application_name)}.tmp }
  command %{ sudo cp #{fetch(:application_name)}.tmp /etc/nginx/sites-available/#{fetch(:application_name)}}
  command %{ rm #{fetch(:application_name)}.tmp }
  command %{ sudo ln -s -f /etc/nginx/sites-available/#{fetch(:application_name)} /etc/nginx/sites-enabled/#{fetch(:application_name)} }
  command %[sudo -A rm -f /etc/nginx/sites-enabled/default]
  comment %{ nginx configurations updated.}
end

##########################################################################
#
# Tasks below are related to installing required stuff required on server
# This include installation of general requirements, nginx, rvm_ruby
#
##########################################################################
desc 'Install everything from the scratch to an ubuntu 17.10 requirements/nodejs/rvm/ruby/rails/nginx/mysql'
task :'install:all' do
  invoke :sys_update
  invoke :requirements_install
  invoke :invoke_nodejs_install
  invoke :rvm_ruby_rails_install
  invoke :memcached_install
  invoke :redis_install
  invoke :nginx_install
end

task :sys_update do
  comment %{ Running sudo apt-get update }
  command %{ sudo apt-get update }
  comment %{ sudo apt-get update completed. }
end

task :requirements_install do
  comment %{ Installing general requirements ... }
  command %{ sudo apt-get install -y git-core curl zlib1g-dev build-essential
             libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3
             libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties
             libffi-dev libmagickwand-dev imagemagick mysql-client libmysqlclient-dev
          }
  comment %{ General requirements installed. }
end

task :rvm_ruby_rails_install do
  comment %{ Installing RVM ... }
  command %{ sudo apt-get install -y libgdbm-dev libncurses5-dev automake libtool bison libffi-dev }
  command %{ gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 }
  command %{ curl -sSL https://get.rvm.io | bash -s stable }
  command %{ source ~/.rvm/scripts/rvm }
  comment %{ Installing ruby ... }
  command %{ rvm install #{fetch(:ruby_version)} }
  command %{ rvm use #{fetch(:ruby_version)}@#{fetch(:gemset)} --create }
  comment %{ Checking ruby version ... }
  command %{ ruby -v }
  comment %{ Installing bundler ... }
  command %{ gem install bundler }
end

task :invoke_nodejs_install do
  comment %{ installing nodejs }
  command %{ curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash - }
  command %{ sudo apt-get install -y nodejs }
  comment %{ nodejs installed. }
end
task :memcached_install do
  comment %{ installing memcached }
  command %{ sudo apt-get install -y memcached }
  comment %{ memcached installed. }
end
task :redis_install do
  comment %{ installing redis }
  command %{ wget -P /tmp http://download.redis.io/redis-stable.tar.gz }
  command %{ tar xvfz /tmp/redis-stable.tar.gz -C /tmp/ }
  command %{ cd '/tmp/redis-stable' }
  command %{ make }
  command %{ sudo -A make install }
  command %{ cd ~ }
  command %{ rm -rf /tmp/redis-* }
  comment %{ redis installed. }
end
task :nginx_install do
  comment %{ installing nginx }
  command %{ sudo apt-get install -y nginx }
  comment %{ nginx installed. }
end


#########################################################################
#
# Libraries
#
##########################################################################

#
# See https://github.com/cespare/ruby-dedent/blob/master/lib/dedent.rb
#
class String
  def dedent
    lines = split "\n"
    return self if lines.empty?
    indents = lines.map do |line|
      line =~ /\S/ ? (line.start_with?(" ") ? line.match(/^ +/).offset(0)[1] : 0) : nil
    end
    min_indent = indents.compact.min
    return self if min_indent.zero?
    lines.map {|line| line =~ /\S/ ? line.gsub(/^ {#{min_indent}}/, "") : line}.join "\n"
  end
end


######
### Pending Items
# 1.) MYSQL
#     a.) Ask mysql password install mysql-server.
#     b.) Ask mysql password/database name and Create Database.
#     c.) Ask mysql password/database name and write them to database.yml.
# 2.) Restart PUMA
# 3.) Install libmagickwand-dev imagemagick mysql-client libmysqlclient-dev
# 4.) nginx $host issue
# 5.) Gitlab ask username password
# 6.) comments