Elastic Beanstalk with Passenger Standalone: working configuration

elastic-beanstalkphusion-passenger

I'm trying to migrate an elastic beanstalk app from Puma to Phusion Passenger. However, Passenger fails at startup with the error:

  /opt/elasticbeanstalk/support/conf/nginx_config.erb:48:in `block in write_nginx_config_file': undefined local variable or method `location_config_filename' for #<PhusionPassenger::Standalone::StartCommand:0x007f1eb35d06f0> (NameError)
    from /opt/rubies/ruby-2.2.2/lib/ruby/2.2.0/erb.rb:863:in `eval'
    from /opt/rubies/ruby-2.2.2/lib/ruby/2.2.0/erb.rb:863:in `result'
    from /opt/rubies/ruby-2.2.2/lib/ruby/gems/2.2.0/gems/passenger-5.0.15/lib/phusion_passenger/standalone/start_command/nginx_engine.rb:120:in `block in write_nginx_config_file'

The Amazon stack name is:

64bit Amazon Linux 2015.03 v2.0.0 running Ruby 2.2 (Passenger Standalone)

The same app runs locally and on Heroku using Passenger. (It also runs OK with Puma).

Is there a required configuration file or configuration option I've missed?

(I'm using eb_deployer for blue-green deployment rather than the AWS Console – so it might be a default somewhere).

Best Answer

I was having the same issue and after some digging I found that the version of passenger Amazon was using on

64bit Amazon Linux 2015.03 v2.0.0

is Passenger 4.0.59.

If you just have gem "passenger" in your gemfile without specifying the version your app is installing v5.0 or newer which conflicts with the EBS setup. Whatever changes they made between 4.0.59 and 5.0 seems to be messing up the deploy because when I set the version in my gemfile and redeployed it worked.

gem "passenger", '~> 4.0.59'

After you update your gemfile and push the code make sure you terminate the instance to get a fresh one. After the deploy check the eb-activity.log for the line

Using passenger 4.0.59

EDIT: As Chris pointed out below you don't need to include passenger in your gem file since it is already included. This will prevent the issue all together, no need to worry about versions.

gem "passenger ", group: :development

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Best option is to use .ebextensions dir in the root of your project, and add a config file to configure passenger. I've created an .ebextensions/01_passenger.config file in my project.

For the content section of this file you will probably want to copy your existing passenger init file located here /opt/elasticbeanstalk/support/conf/passenger

I've slightly modified it to include --max-pool-size=${PASSENGER_MAX_POOL_SIZE:-6} in the start options. You can use the Beanstalk Environment variables to override the default of 6 for the pool size.

files:
  "/tmp/passenger.config":
    mode: "000755"
    owner: root
    group: root
    content: |
      #!/usr/bin/env bash
      #
      # chkconfig: 2345 80 20
      # description: Passenger
      #

      EB_HTTP_PORT=$(/opt/elasticbeanstalk/bin/get-config container -k http_port)
      EB_APP_USER=$(/opt/elasticbeanstalk/bin/get-config container -k app_user)
      EB_APP_DEPLOY_DIR=$(/opt/elasticbeanstalk/bin/get-config container -k app_deploy_dir)
      EB_APP_PID_DIR=$(/opt/elasticbeanstalk/bin/get-config container -k app_pid_dir)
      EB_APP_LOG_DIR=$(/opt/elasticbeanstalk/bin/get-config container -k app_log_dir)
      EB_SCRIPT_DIR=$(/opt/elasticbeanstalk/bin/get-config container -k script_dir)
      EB_SUPPORT_DIR=$(/opt/elasticbeanstalk/bin/get-config container -k support_dir)
      EB_NGINX_VERSION=$(/opt/elasticbeanstalk/bin/get-config container -k nginx_version)

      . $EB_SUPPORT_DIR/envvars
      . $EB_SCRIPT_DIR/use-app-ruby.sh

      if [ -f /etc/elasticbeanstalk/set-ulimit.sh ]; then
        . /etc/elasticbeanstalk/set-ulimit.sh
      fi

      # fixes http://code.google.com/p/phusion-passenger/issues/detail?id=614
      export HOME=/tmp
      export PASSENGER_DOWNLOAD_NATIVE_SUPPORT_BINARY=0

      if [ -d /etc/healthd ]; then
          STARTOPTS="--nginx-version $EB_NGINX_VERSION --nginx-config-template $EB_SUPPORT_DIR/conf/nginx_config_healthd.erb"
      else
          STARTOPTS="--nginx-version $EB_NGINX_VERSION --nginx-config-template $EB_SUPPORT_DIR/conf/nginx_config.erb"
      fi

      ENV_STAGE=${RACK_ENV:-$RAILS_ENV}    # Read from $RAILS_ENV if $RACK_ENV is empty
      if [ ${ENV_STAGE,,} = "production" ]; then    # Convert $ENV_STAGE to lower case and compare to "production"
        # Disable passenger friendly page for production stage
        STARTOPTS="$STARTOPTS --no-friendly-error-pages"
      fi

      #Add custom max-pool size
      STARTOPTS="$STARTOPTS  --max-pool-size=${PASSENGER_MAX_POOL_SIZE:-6}"

      GENERALOPTS="-p $EB_HTTP_PORT --pid-file $EB_APP_PID_DIR/passenger.pid"

      function start() {
        touch $EB_APP_LOG_DIR/passenger.log

        if [ -d /etc/healthd ]; then
          mkdir -p $EB_APP_LOG_DIR/healthd
          chown -R $EB_APP_USER:$EB_APP_USER $EB_APP_LOG_DIR/healthd
        fi

        chown $EB_APP_USER:$EB_APP_USER \
          $EB_APP_LOG_DIR/passenger.log
        passenger start $EB_APP_DEPLOY_DIR $STARTOPTS $GENERALOPTS \
          -d -e ${RACK_ENV:-$RAILS_ENV} --user $EB_APP_USER \
          --log-file $EB_APP_LOG_DIR/passenger.log
      }

      function stop() {
        passenger stop $GENERALOPTS
      }

      function status() {
        passenger status $GENERALOPTS
      }

      case "$1" in
        start)
          start
          ;;
        stop)
          stop
          ;;
        status)
          status
          ;;
        restart|graceful)
          stop
          start
          ;;
        reload)
          su -s /bin/bash -c "touch $EB_APP_DEPLOY_DIR/tmp/restart.txt" $EB_APP_USER
          ;;
        *)
          echo "Usage: $0 {start|stop|restart|reload|status}"
          exit 1
          ;;
      esac

      exit 0

container_commands:
  01_config_passenger:
    command: "cp /tmp/passenger.config /opt/elasticbeanstalk/support/conf/passenger"

Best Answer

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