RoR开发日志三 Capistrano + Puma + Caddy部署特辑

group :development do

  ...

  # Use capistrano for automated deployment
  gem "capistrano", "~> 3.10", require: false
  gem "capistrano-rails", "~> 1.5", require: false
  gem "capistrano-yarn", require: false
  gem "capistrano-rbenv", require: false
  gem 'capistrano3-puma', require: false
end

# Capfile
# Load DSL and set up stages
require "capistrano/setup"

# Include default deployment tasks
require "capistrano/deploy"

# Load the SCM plugin appropriate to your project:
#
# require "capistrano/scm/hg"
# install_plugin Capistrano::SCM::Hg
# or
# require "capistrano/scm/svn"
# install_plugin Capistrano::SCM::Svn
# or
require "capistrano/scm/git"
install_plugin Capistrano::SCM::Git

# Include tasks from other gems included in your Gemfile
#
# For documentation on these, see for example:
#
#   https://github.com/capistrano/rvm
#   https://github.com/capistrano/rbenv
#   https://github.com/capistrano/chruby
#   https://github.com/capistrano/bundler
#   https://github.com/capistrano/rails
#   https://github.com/capistrano/passenger
#
# require "capistrano/rvm"
require 'capistrano/rails'
require "capistrano/rbenv"
# require "capistrano/chruby"
# require "capistrano/bundler"
# require "capistrano/rails/assets"
# require "capistrano/rails/migrations"
# require "capistrano/passenger"
require 'capistrano/puma'
install_plugin Capistrano::Puma

# Load custom tasks from `lib/capistrano/tasks` if you have any defined
Dir.glob("lib/capistrano/tasks/*.rake").each { |r| import r }

# config/deploy.rb
# config valid for current version and patch releases of Capistrano
lock "~> 3.14.0"

`ssh-add`

set :application, "<application name>"
set :repo_url, "<git repo ssh>"

...

# Default deploy_to directory is /var/www/my_app_name
set :deploy_to, "<deployment folder on server>"

...

# Default value for :linked_files is []
append :linked_files, "config/database.yml", "config/master.key", "config/application.yml"

# Default value for linked_dirs is []
append :linked_dirs, "log", "tmp/pids", "tmp/cache", "tmp/sockets", "public/system"

...

# config/deploy/production.rb

...

server "<server ip>", user: "ubuntu", roles: %w{app db web}, my_property: :my_value

...

set :ssh_options, {
  keys: %w(~/.ssh/<aws ssh pem>),
  forward_agent: true,
  auth_methods: %w(publickey)
}

...

# config/puma.rb
# Puma can serve each request in a thread from an internal thread pool.
# The `threads` method setting takes two numbers: a minimum and maximum.
# Any libraries that use thread pools should be configured to match
# the maximum value specified for Puma. Default is set to 5 threads for minimum
# and maximum; this matches the default thread size of Active Record.
#
max_threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }
min_threads_count = ENV.fetch("RAILS_MIN_THREADS") { max_threads_count }
threads min_threads_count, max_threads_count

# Specifies the `port` that Puma will listen on to receive requests; default is 3000.
#
port        ENV.fetch("PORT") { 3000 }

# Specifies the `environment` that Puma will run in.
#
environment ENV.fetch("RAILS_ENV") { "development" }

# Specifies the `pidfile` that Puma will use.
pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }

# Specifies the number of `workers` to boot in clustered mode.
# Workers are forked web server processes. If using threads and workers together,
# the concurrency of the application would be max `threads` * `workers.`
# Workers do not work on JRuby or Windows (both of which do not support
# processes).
#
workers ENV.fetch("WEB_CONCURRENCY") { 2 } # <------ uncomment this line

# Use the `preload_app!` method when specifying a `workers` number.
# This directive tells Puma to first boot the application and load code
# before forking the application. This takes advantage of Copy On Write
# process behavior so workers use less memory.
#
preload_app! # <------ uncomment this line

# Allow Puma to be restarted by the `Rails restart` command.
plugin :tmp_restart

# lib/capistrano/tasks/restart_puma.rake
namespace :puma do
  Rake::Task[:restart].clear_actions

  desc 'Overwritten puma:restart task'
  task :restart do
    puts 'Overwriting puma:restart to ensure that puma is running. Effectively, we are just starting Puma.'
    puts 'A solution to this should be found.'
    invoke 'puma:stop'
    invoke 'puma:start'
  end
end