template for a gunicorn upstart job that can run several instances of a django application

gunicorn-upstart.conf.template

# %(mysite)s - run %(mysite)s instances (default is the main production instance)
#
# This runs gunicorn-django for %(mysite)s; to install:
#  * sudo ln -s <this file> /etc/init/%(mysite)s
#  * sudo initctl reload-configuration 
#
# it expects the following directory layout:
#
# /home/%(mysite)s/public_html
#   \-env -> virtualenv
#   | \-bin
#   |   \-gunicorn_django
#   |   \-activate
#   \-<instance>
#   | \-app -> application
#   | \-conf
#   | | \-gunicorn_<instance>.conf.py
#   | | \-<this file>
#   | \-log -> logs
#   | \-run -> pid files and the like
#   \-<instance>
#   ...
#
# to use:
#  * sudo start/stop/restart/reload/status %(mysite)s
#  * sudo start/stop/restart/reload/status %(mysite)s instance=testing

description "%(mysite)s gunicorn instance, default is the main instance"

start on runlevel [2345]
stop on runlevel [06]

expect fork

respawn
respawn limit 10 5

instance ${instance:-main}

env APPHOME="/home/%(mysite)s/public_html"

pre-start script
    INST=${instance:-main}
    GUNICORN="$APPHOME/env/bin/gunicorn_django"

    test -n "$GUNICORN" -a -x "$GUNICORN" || { stop; exit 0; }
    test -d "$APPHOME" || { stop; exit 0; }
end script

script
    INST=${instance:-main}
    CONF="$APPHOME/$INST/conf/gunicorn_$INST.conf.py"
    GUNICORN="$APPHOME/env/bin/gunicorn_django"

    PIDFILE="$APPHOME/$INST/run/$INST.pid"
    LOGFILE="$APPHOME/$INST/log/gunicorn.log"

    cd "$APPHOME/$INST/app"
    source "$APPHOME/"
    exec $GUNICORN --pid="$PIDFILE" --name="$INST" --user=django --group=django --config="$CONF" --daemon --log-file="$LOGFILE" 2>>"$LOGFILE"
end script

post-stop script
    INST=${instance:-main}
    rm -rf "$APPHOME/$INST/run/$INST".{pid,sock}
end script

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