Module: Systemd::Rails

Defined in:
lib/shared_infrastructure/systemd/rails.rb

Class Method Summary collapse

Class Method Details

.puma_uri(domain_name) ⇒ Object 



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# File 'lib/shared_infrastructure/systemd/rails.rb', line 6

def puma_uri(domain_name)
  "unix:///tmp/#{domain_name}.sock"
end

.redis_location(domain_name) ⇒ Object 



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# File 'lib/shared_infrastructure/systemd/rails.rb', line 10

def redis_location(domain_name)
  "redis." + domain_name
end

.write_unit_file(domain_name, domain) ⇒ Object 



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# File 'lib/shared_infrastructure/systemd/rails.rb', line 14

def write_unit_file(domain_name, domain)
  # if ENV["SECRET_KEY_BASE"].nil? ||
  #    ENV["DATABASE_USERNAME"].nil? ||
  #    ENV["DATABASE_PASSWORD"].nil? ||
  #    ENV["EMAIL_PASSWORD"].nil?
  #   raise "Missing environment variable"
  # end
  #
  puts "writing unit file (domain_name): #{Systemd.unit_file(domain_name)} (#{domain_name})" if Runner.debug

  result = File.open(Systemd.unit_file(domain_name), "w") do |f|
    f << <<~UNIT_FILE
      [Unit]
      Description=Puma HTTP Server for #{domain_name}
      After=network.target

      # Uncomment for socket activation (see below)
      # Requires=#{domain_name}.socket

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

      User=nobody
      Group=www-data

      # Specify the path to the Rails application root
      WorkingDirectory=#{Nginx.root_directory(domain_name)}

      # Helpful for debugging socket activation, etc.
      # Environment=PUMA_DEBUG=1
      Environment=RACK_ENV=production
      Environment=RAILS_ENV=production
      # FIXME: The following is the wrong place
      EnvironmentFile=#{domain.secrets}
      Environment=REDIS_URL=unix:///tmp/#{redis_location(domain_name)}.sock

      # The command to start Puma
      # NOTE: TLS would be handled by Nginx
      ExecStart=#{Nginx.root_directory(domain_name)}/bin/puma -b #{puma_uri(domain_name)} \
        --redirect-stdout=#{Nginx.root_directory(domain_name)}/log/puma-production.stdout.log \
        --redirect-stderr=#{Nginx.root_directory(domain_name)}/log/puma-production.stderr.log
      # ExecStart=/usr/local/bin/puma -b tcp://#{puma_uri(domain_name)}

      Restart=always

      [Install]
      WantedBy=multi-user.target
    UNIT_FILE
  end

  puts "changing mode of unit file" if Runner.debug
  FileUtils.chmod(0o600, Systemd.unit_file(domain_name))
  puts "enabling service" if Runner.debug && Process.uid.zero?
  `systemctl enable #{domain_name}.service` if Process.uid.zero?

  result
end