Simple wrapper (used mostly in supervisord)

gunicorn.sh

#!/bin/bash
# This script is a wrapper around gunicorn
# It provides clean interface for starting stopping app server

PROJECT_NAME=photon
HOME_DIR=/home/photon

RELEASE_DIR=$HOME_DIR/releases/current
GUNICORN_BIN=$HOME_DIR/bin/gunicorn_django
GUNICORN_PID=$HOME_DIR/pids/gunicorn.pid
GUNICORN_CONF=$RELEASE_DIR/config/gunicorn.conf.py
DJANGO_SETTINGS=$RELEASE_DIR/$PROJECT_NAME/production.py

# activate virtualenv environment
source $HOME_DIR/bin/activate

function start {
    echo "Starting gunicorn.";
    ulimit -s 512;
    exec $GUNICORN_BIN --config $GUNICORN_CONF $DJANGO_SETTINGS;
}

function stop {
    echo "Stopping gunicorn.";
    kill `cat $GUNICORN_PID`;
}

function reload {
    echo "Reloading gunicorn workers.";
    kill -HUP `cat $GUNICORN_PID`;
}

function add_worker {
    echo "Adding one worker."
    kill -TTIN `cat $GUNICORN_PID`;
}

function remove_worker {
    echo "Removing one worker."
    kill -TTOU `cat $GUNICORN_PID`;
}

case $1 in
    "start") start;;
    "stop") stop;;
    "reload") reload;;
    "add_worker") add_worker;;
    "remove_worker") remove_worker;;
    *) echo "No argument given: start|stop|reload|add_worker|remove_worker";;
esac