starman

#!/bin/bash
#
# starman      RHEL/CENTOS init script for Starman web server
#
# chkconfig: 345 56 50
# description: Runs the Starman web server in production environments.
#              Uses start_server superdaemon for graceful restarts and
#              runs as user/group "nobody." Expects local Perl install
#              with plenv.
#              HOME and environment setup must be customized for environment.
#              See also perldoc Starman and Server::Starter.
#              Repository: https://github.com/mla/starman-init
#
# pidfile: /var/run/starman.pid

# app settings
HOME=/home/myhome
APP_HOME=$HOME/sites/myapp
APP=$APP_HOME/app.psgi
APP_NAME=$(basename $(readlink -f $0))
START_SERVER=$APP_HOME/vendor/perl5/bin/start_server
STARMAN=$APP_HOME/vendor/perl5/bin/starman
PORT=5000
WORKERS=32
USER=nobody
GROUP=nobody

PID_FILE=/var/run/$APP_NAME.pid
STATUS_FILE=/var/run/$APP_NAME.status
LOCK_FILE=/var/lock/subsys/$APP_NAME
LOGDIR=/var/log/$APP_NAME

cd $HOME || exit 3 

# configure app perl
export PATH=$HOME/.plenv/bin:/sbin:/bin:/usr/bin:/usr/sbin
eval "$(plenv init -)"

# Source function library.
. /etc/init.d/functions

# Get config.
test -f /etc/sysconfig/network && . /etc/sysconfig/network

# Check that we are root
[ `id -u` = 0 ] || { echo "must be root"; exit 1; }

# Check that networking is up.
[ "${NETWORKING}" = "yes" ] || exit 0

RETVAL=0

start(){
    echo -n $"Starting $APP_NAME: "

    mkdir -p $LOGDIR

    daemon --pidfile $PID_FILE \
      $START_SERVER \
        --interval=5 \
        --port=$PORT \
        --signal-on-hup=QUIT \
        --signal-on-term=QUIT \
        --pid-file=$PID_FILE \
        --status-file=$STATUS_FILE \
        --backlog=1024 \
        -- \
        $STARMAN \
          --preload-app \
          --workers $WORKERS \
          --user $USER \
          --group $GROUP \
          --error-log $LOGDIR/error.log \
          --access-log $LOGDIR/access.log \
          $APP \
          &

    RETVAL=$?
    echo
    touch $LOCK_FILE
    return $RETVAL
}

stop(){
    echo -n $"Stopping $APP_NAME: "
    killproc -p $PID_FILE $APP_NAME
    RETVAL=$?
    echo
    rm -f $LOCK_FILE
    return $RETVAL
}

graceful(){
    if [ -s $PID_FILE ]; then
      echo -n $"Gracefully restarting $APP_NAME: "
      $START_SERVER \
        --pid-file $PID_FILE \
        --status-file $STATUS_FILE \
        --restart
      RETVAL=$?
      echo
      return $RETVAL
    else
      echo $"Not running."
      start
    fi
}

restart(){
    stop
    start
}

condrestart(){
    [ -e $LOCK_FILE ] && restart
    return 0
}


# See how we were called.
case "$1" in
    start)
 start
 ;;
    stop)
 stop
 ;;
    status)
 status -p $PID_FILE $APP_NAME
 ;;
    graceful)
 graceful 
 ;;
    restart)
 restart
 ;;
    condrestart)
 condrestart
 ;;
    *)
 echo $"Usage: $0 {start|stop|status|graceful|restart|condrestart|reload}"
 RETVAL=1
esac

exit $RETVAL