Deploying with Puma, Capistrano and Nginx

Deploying with Puma, Capistrano and Ngix

<< Deploying with Capistrano and Capistrano3-puma >>

1. Install following gems
> capistrano, capistrano-rails, capistrano-rbenv, capistrano-bundler, capistrano3-puma

2. Generate capistrano config files
> run the following command to generate your capistrano configuration
> cap install STAGES=production

3. Require the capistrano-rails
> Add following code to 'Capfile' file
> require 'capistrano/rails'

4. Set configuration for capistrano-rbenv
> Add following codes to 'Capfile' file
  require 'capistrano/rbenv'
  set :rbenv_type, :user
  set :rbenv_ruby, '2.3.1'
* Optionally, the above set codes can be kept in 'config/deploy/proudction.rb'

5. Configuration for the config/deploy.rb

> Add following codes to 'config/deploy.rb' file

  set :application, "my_app_name"
  set :repo_url, "git@example.com:me/my_repo.git"

  set :deploy_to, '/home/deploy/my_app_name'

  append :linked_files, "config/database.yml", "config/secrets.yml"
  append :linked_dirs, "log", "pids", "tmp/cache", "sockets", "public/system", "vendor/bundle", "public/uploads"

6. Configuration for 'config/deploy/production.rb' file

> Add following codes to 'config/deploy/production.rb' file

  server '127.0.0.1', user: 'deploy', roles: %w{app db web} 

7. SSH configuration

> Add follwoing codes to 'config/deploy/production.rb' file

set :ssh_options, {
  keys: %w(~/.ssh/id_rsa),
  forward_agent: true
}

8. Configuration for 'capistrano-bundler'

> require 'capistrano-bundler' in 'Capfile' file
  require 'capistrano/bundler'

9. Configuration for 'capistrano-puma'

> require 'capistrano-puma' in 'Capfile' file.
  require 'capistrano/puma'
  install_plugin Capistrano::Puma  # Default puma tasks

> Add following codes to 'config/deploy.rb'

  # Configurations for Puma
  set :puma_threads,    [0, 16]
  set :puma_workers,    0

  set :puma_jungle_conf, '/etc/puma.conf'
  set :puma_run_path, '/usr/local/bin/run-puma'

  set :puma_bind, "unix://#{shared_path}/sockets/puma.sock"
  set :puma_init_active_record, true
  set :puma_state,      "#{shared_path}/pids/puma.state"  
  set :puma_pid,        "#{shared_path}/pids/puma.pid"  
  set :puma_access_log, "#{shared_path}/log/puma.error.log"  
  set :puma_error_log,  "#{shared_path}/log/puma.access.log"  
  set :puma_preload_app, false  
  set :puma_worker_timeout, nil
  set :puma_role, :app
  set :puma_env, fetch(:rack_env, fetch(:rails_env, 'production'))

> Create database.yml and secrets.yml in 'shared/config' folder of server

> Run 'cap production deploy:check' to check the configs


< References >
https://gorails.com/deploy/ubuntu/16.04