sidekiq init script sample

sidekiq_init_script.sh

#!/bin/sh
#
# sidekiq_tkikaku    Init script for Sidekiq tkikaku
#
# chkconfig: 345 75 25
# description: Starts and Stops Sidekiq message processor for Stratus application.
# processname: sidekiq_tkikaku
# user-specified exit parameters used in this script:
#
# Exit Code 5 - Incorrect User ID
# Exit Code 6 - Directory not found

. /etc/rc.d/init.d/functions
. /etc/sysconfig/network

[ "$NETWORKING" = "no" ] && exit 0

# Variables
APP="tkikaku"
RAILS_ENV="staging"
SERVICE_NAME="sidekiq_${APP}_${RAILS_ENV}"
APP_DIR="/var/www/html/${APP}/current"
APP_CONFIG="${APP_DIR}/config/sidekiq.yml"
LOCK_FILE="${APP_DIR}/tmp/pids/sidekiq.lock"
PID_FILE="${APP_DIR}/tmp/pids/sidekiq.pid"
RUNAS=ec2-user
CMD="cd ${APP_DIR} && bundle exec sidekiq -e ${RAILS_ENV} -C ${APP_CONFIG} --daemon"
RETVAL=0

start() {
  echo -n "Starting ${SERVICE_NAME}: "
  status
  if [ $? -eq 1 ]; then
    [ `id -u` == '0' ] || (echo "sidekiq runs as root only .."; exit 5)
    [ -d $APP_DIR ] || (echo "$APP_DIR not found!.. Exiting"; exit 6)

    su -c "$CMD" - $RUNAS
    RETVAL=$?

    # sleeping for 8 seconds for process to be precisely visible in process table
    sleep 8
    echo_success
    echo

    [ $RETVAL -eq 0 ] && su -c "touch ${LOCK_FILE}" - $RUNAS
    return $RETVAL
  else
    echo_failure
    echo "already running"
  fi
}

stop() {
  echo -n "Stopping ${SERVICE_NAME}: "
  killproc -p $PID_FILE $APP -TERM
  RETVAL=$?
  echo
  [ $RETVAL -eq 0 ] && rm -f $LOCK_FILE
  return $RETVAL
}

restart() {
  stop
  # avoid race
  sleep 3
  start
}

status() {
  ps -ef | egrep "sidekiq [0-9]+.[0-9]+.[0-9]+ ${APP} \[" | grep -v grep
  return $?
}

usage() {
  echo "Usage: $0 {start|stop|restart|status}"
}

case "$1" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  restart)
    restart
    ;;
  status)
    status
    if [ $? -eq 0 ]; then
      echo "sidekiq is running .."
      RETVAL=0
    else
      echo "sidekiq is stopped .."
      RETVAL=1
    fi
    ;;
  *)
    usage
    exit 0
    ;;
esac
exit $RETVAL
le

see:

• https://gist.github.com/ariejan/5004493
• http://www.lexicallyscoped.com/2013/04/02/simple-init.d-script-for-ansible.html