use sidekiq

lib/puma/plugin/redis_server.rb

@@ -0,0 +1,70 @@
+# frozen_string_literal: true
+
+require 'puma/plugin'
+
+# rubocop:disable Metrics
+Puma::Plugin.create do
+  def start(launcher)
+    return if ENV['LOCAL_REDIS_URL'].to_s.empty?
+
+    @puma_pid = $PROCESS_ID
+
+    launcher.events.on_booted do
+      @redis_server_pid = fork_redis
+    end
+
+    in_background { monitor_redis }
+
+    at_exit do
+      stop_redis_server if Process.pid == @puma_pid
+    end
+
+    launcher.events.on_stopped { stop_redis_server }
+    launcher.events.on_restart { stop_redis_server }
+  end
+
+  private
+
+  def monitor_redis
+    loop do
+      if redis_dead?
+        Process.kill(:INT, @puma_pid)
+
+        break
+      end
+
+      sleep 5
+    end
+  end
+
+  def redis_dead?
+    return false unless @redis_server_pid
+
+    Process.waitpid(@redis_server_pid, Process::WNOHANG)
+
+    false
+  rescue Errno::ECHILD, Errno::ESRCH
+    true
+  end
+
+  def fork_redis
+    fork do
+      Process.setsid
+
+      Dir.chdir(ENV.fetch('WORKDIR', nil)) unless ENV['WORKDIR'].to_s.empty?
+
+      exec('redis-server', '--requirepass', Digest::SHA1.hexdigest("redis#{ENV.fetch('SECRET_KEY_BASE', '')}"),
+           out: '/dev/null')
+    end
+  end
+
+  def stop_redis_server
+    if @redis_server_pid
+      Process.kill(:INT, @redis_server_pid)
+      Process.wait(@redis_server_pid)
+    end
+  rescue Errno::ECHILD, Errno::ESRCH
+    nil
+  end
+end
+# rubocop:enable Metrics