sentry

#!/bin/bash
# /etc/init.d/sentry
# A debian-compatible sentry startup script
#
### BEGIN INIT INFO
# Provides:          sentry
# Required-Start:    $remote_fs $syslog $network
# Required-Stop:     $remote_fs $syslog $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start Sentry at boot time
# Description:       Controls the sentry aggregate logging engine.

#
# Specify some important information
#
PATH=/bin:/usr/bin:/sbin:/usr/sbin
DESC="Sentry aggregate logging system"
NAME=sentry
SCRIPTNAME=$0
SETSID=/usr/bin/setsid
SENTRY=/srv/sentry/bin/sentry
SENTRY_CONF=/etc/sentry/sentry.conf.py
SENTRY_LOG=/var/log/sentry.log
SENTRY_USER=sentry
SU=/bin/su

# Include default settings if available
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

# Ensure the setsid program exists
[ -x "$SETSID" ] || (echo "setsid package not installed" && exit 0)

# Make sure we run as root
[ `id -u` -ne 0 ] && (echo "The $1 init script can only be run as root" && exit 1)

#
# Check the specified port for availability to bind
#
check_port() {
    local service=$1
    local assigned=$2
    local default=$3

    if [ -n "$assigned" ]; then
        port=$assigned
    else
        port=$default
    fi

    count=`netstat --listen --numeric-ports | grep \"$port[[:space:]] | grep -c . `

    if [ $count -ne 0 ]; then
        echo "The selected $service port ($port) seems to be in use by another program "
        echo "Please select another port to use for $NAME"
        return 1
    fi
}

#
# Determines whether or not the service is running
#
get_pid() {
    echo $(ps auxw | grep gunicorn | grep master | grep -oP "^[^0-9]+([0-9]+)" | grep -oP "[0-9]+")
}

#
# Handles starting the sentry service and ensuring that it started correctly and
# without problems.
#
start() {
    PID=$(get_pid)
    [ "$PID" ] && (echo "Sentry is already running" && return 1)

    mkdir $(dirname $SENTRY_LOG) > /dev/null 2>&1 || true
    chown $SENTRY_USER $SENTRY_LOG

    $SU -l $SENTRY_USER --shell=/bin/bash -c "$SETSID $SENTRY --config=$SENTRY_CONF start &> $SENTRY_LOG &" || return 2
    #setsid /srv/sentry/bin/sentry --config=/etc/sentry/sentry.conf.py start &> sentry.log
}

#
# Handles terminating the sentry service and ensuring that it terminated
# correctly.
#
stop() {
    PID=$(get_pid)
    [ "$PID" ] && (kill $PID || return 3)
}

#
# Determines whether or not the service is running
#
status() {
    PID=$(get_pid)
    if [ "$PID" ]; then
        echo "Sentry is running"
    else
        echo "Sentry is stopped"
    fi
}

#
# Deal with the request
#
case "$1" in
  start)
    echo "Starting sentry"
    start
    ;;
  stop)
    echo "Stopping sentry"
    stop
    ;;
  status)
    status
    ;;
  *)
    echo "Usage: $0 {start|stop|status}"
    exit 1
    ;;
esac

exit 0