Ubuntu Rails deployments(RVM, Puma, Mina, Nginx)

puma.rb

#!/usr/bin/env puma

# start puma with:
# RAILS_ENV=production bundle exec puma -C ./config/puma.rb

# threads_count = ENV.fetch("RAILS_MAX_THREADS") { 16 }
rails_env = 'production'

app_path = '/home/deploy/my_app'
current_path = "#{app_path}/current"
shared_path = "#{app_path}/shared"
log_path = {
  out: "#{shared_path}/log/puma-#{rails_env}.stdout.log"
  error: "#{shared_path}/log/puma-#{rails_env}.stderr.log"
}

plugin :tmp_restart

workers 4
threads 0, 8

directory current_path
environment rails_env
# daemonize true

pidfile "#{current_path}/tmp/pids/puma-#{rails_env}.pid"
state_path "#{current_path}/tmp/pids/puma-#{rails_env}.state"

stdout_redirect(log_path[:out], log_path[:error], true)
bind "unix://#{shared_path}/tmp/sockets/#{rails_env}.sock"

puma.service

[Unit]
Description=Puma HTTP Server
After=network.target

# Uncomment for socket activation (see below)
# Requires=puma.sock

[Service]
# Foreground process (do not use --daemon in ExecStart or config.rb)
Type=simple

# Preferably configure a non-privileged user
User=deploy

# The path to the puma application root
# Also replace the "<WD>" place holders below with this path.
WorkingDirectory=/home/deploy/my_app/current

# Helpful for debugging socket activation, etc.
# Environment=PUMA_DEBUG=1

# The command to start Puma. This variant uses a binstub generated via
# `bundle binstubs puma --path ./sbin` in the WorkingDirectory
# (replace "<WD>" below)
#ExecStart=<WD>/sbin/puma -b tcp://0.0.0.0:9292 -b ssl://0.0.0.0:9293?key=key.pem&cert=cert.pem

# Variant: Use config file with `bind` directives instead:
ExecStart=/home/deploy/.rvm/rubies/ruby-2.6.1/bin/bundle exec puma -C /home/deploy/my_app/current/config/puma.rb
# Variant: Use `bundle exec --keep-file-descriptors puma` instead of binstub

Restart=always

[Install]
WantedBy=multi-user.target

ubuntu_rails_deployment.md

RVM wrappers

rvm alias create my_app 2.6.1@my_app