What happens if the process dies? you are not using a process manager like upstart, systemd or supervisord.

We have al these scripts to manage sidekiq properly.

commands:
  02_create_sidekiq_log_file:
    command: touch /var/log/sidekiq_worker.log

files:
  "/opt/elasticbeanstalk/support/conf/sidekiq_worker.conf":
    mode: "000755"
    owner: root
    group: root
    content: |
      description "Elastic Beanstalk Sidekiq Background Worker"

      # Greatly reduce Ruby memory fragmentation and heap usage
      # mikeperham.com/2018/04/25/taming-rails-memory-blo…
      env MALLOC_ARENA_MAX=2

      respawn
      respawn limit 3 30

      # TERM is sent by sidekiqctl when stopping sidekiq. Without declaring these as
      # normal exit codes, it just respawns.
      normal exit 0 TERM

      # Upstart waits 5 seconds by default to kill a process. Increase timeout to
      # give sidekiq process enough time to exit.
      kill timeout 30

      script
      exec /bin/bash <<"EOT"
        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_SUPPORT_DIR/envvars
        . $EB_SCRIPT_DIR/use-app-ruby.sh

        EB_APP_DEPLOY_DIR=$(/opt/elasticbeanstalk/bin/get-config container -k app_deploy_dir)

        cd $EB_APP_DEPLOY_DIR
        echo "Bundle exec sidekiq worker"
        exec bundle exec sidekiq -e ${RACK_ENV} \
          -C ${EB_APP_DEPLOY_DIR}/config/sidekiq.yml >/var/log/sidekiq_worker.log 2>&1
      EOT
      end script

files:
  "/etc/init/sidekiq_worker.conf":
    mode: "120400"
    content: "/opt/elasticbeanstalk/support/conf/sidekiq_worker.conf"
  "/etc/init/workers.conf":
    mode: "000755"
    owner: root
    group: root
    content: |
      description "Manages the Set of Sidekiq Processes"

      # Use "sudo stop workers" to stop all Sidekiq instances.
      # Use "sudo start workers" to start all instances.
      # Use "sudo restart workers" to restart all instances.

      # This starts upon bootup and stops on shutdown
      start on runlevel [2345]
      stop on runlevel [06]

      pre-start script
        sudo start sidekiq_worker
      end script

      post-stop script
        sudo stop sidekiq_worker
      end script

commands:
  reload_initctl_for_sidekiq:
    command: "sudo initctl reload-configuration"

files:
  "/tmp/sidekiq_mute.sh":
    mode: "000755"
    owner: root
    group: root
    content: |
      #!/bin/bash
      skwpid=$(initctl status sidekiq_worker | grep /running | awk '{print $NF}')
      if [ -f skwpid ]
      then
        echo "TSTP/quieting sidekiq worker"
        sudo kill -TSTP skwpid
      fi

files:
  "/tmp/sidekiq_restart.sh":
    mode: "000755"
    owner: root
    group: root
    content: |
      #!/bin/bash
      skwpid=$(initctl status sidekiq_worker | grep /running | awk '{print $NF}')
      if [ -f skwpid ]
      then
        echo "TERM/terminating sidekiq worker"
        sudo kill -TERM skwpid
      fi

      echo "STOPPING all sidekiq workers"
      sudo stop workers

      echo "STARTING all sidekiq workers"
      sudo start workers

files:
  "/opt/elasticbeanstalk/hooks/appdeploy/post/50_restart_sidekiq.sh":
    mode: "120755"
    owner: root
    group: root
    content: "/tmp/sidekiq_restart.sh"

  "/opt/elasticbeanstalk/hooks/configdeploy/post/50_restart_sidekiq.sh":
    mode: "120755"
    owner: root
    group: root
    content: "/tmp/sidekiq_restart.sh"

  "/opt/elasticbeanstalk/hooks/restartappserver/post/50_restart_sidekiq.sh":
    mode: "120755"
    owner: root
    group: root
    content: "/tmp/sidekiq_restart.sh"

  "/opt/elasticbeanstalk/hooks/appdeploy/pre/03_mute_sidekiq.sh":
    mode: "120755"
    owner: root
    group: root
    content: "/tmp/sidekiq_mute.sh"

  "/opt/elasticbeanstalk/hooks/configdeploy/pre/03_mute_sidekiq.sh":
    mode: "120755"
    owner: root
    group: root
    content: "/tmp/sidekiq_mute.sh"

  "/opt/elasticbeanstalk/hooks/restartappserver/pre/03_mute_sidekiq.sh":
    mode: "120755"
    owner: root
    group: root
    content: "/tmp/sidekiq_mute.sh"