bin_bigquery

#!/bin/bash
#
# Lab01 <summary>
#
# chkconfig:   2345 80 20
# description: Starts and stops a single Lab01 instance on this system
#

### BEGIN INIT INFO
# Provides: Lab01
# Required-Start: $network $named
# Required-Stop: $network $named
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Starts and stops Lab01 node js
# Description: Lab01
### END INIT INFO

PATH=/sbin:/usr/sbin:/bin:/usr/bin
export PATH
export GO_ENV="production"
export GO_PORT="8091"
# Sets the default values for Lab01 variables used in this script
APP_NAME="bigquery"
USER="root"
GROUP="$USER"
APP_DIR="/opt/backend"
KWARGS=""
PID_DIR="/var/run/bigquery"
PID_FILE="$PID_DIR/$APP_NAME.pid"
LOG_DIR="/var/log/bigquery"
LOG_FILE="$LOG_DIR/$APP_NAME.log"
CONFIG_DIR="$APP_DIR/config/"

exec="${APP_DIR}/${APP_NAME}"
lockfile="/var/lock/subsys/$APP_NAME"

trace() {
  logger -t "/etc/init.d/bigquery" "$@"
}

emit() {
  trace "$@"
  echo "$@"
}

start() {
    # Ensure that the PID_DIR exists (it is cleaned at OS startup time)
    if [ -n "$PID_DIR" ] && [ ! -e "$PID_DIR" ]; then
        mkdir -p "$PID_DIR" && chown "$USER":"$GROUP" "$PID_DIR"
    fi
    if [ -n "$PID_FILE" ] && [ ! -e "$PID_FILE" ]; then
        touch "$PID_FILE" && chown "$USER":"$GROUP" "$PID_FILE"
    fi

    # Ensure the log directory is setup correctly.
    if [ -n "$LOG_DIR" ] && [ ! -e "$LOG_DIR" ]; then
        mkdir -p "$LOG_DIR" && chown "$USER":"$GROUP" "$LOG_DIR"
        chmod 755 "$LOG_DIR"
    fi

    #sh -c " cd \"$APP_DIR\" exec \"$exec\"" >> "$LOG_FILE" 2>> "$LOG_FILE" &

    # Run the program!
    # chroot --userspec "$USER":"$GROUP" "$APP_DIR"
    sh -c "

        cd \"$APP_DIR\"
        exec \"$exec\"
    " >> "$LOG_FILE" 2>> "$LOG_FILE" &

    # Generate the pidfile from here. If we instead made the forked process
    # generate it there will be a race condition between the pidfile writing
    # and a process possibly asking for status.
    echo $! > $PID_FILE

    emit "$APP_NAME started"
    return 0
}

stop() {
  # Try a few times to kill TERM the program
  if status ; then
    pid=$(cat "$PID_FILE")
    trace "Killing $APP_NAME (pid $pid) with SIGTERM"
    kill -TERM $pid
    # Wait for it to exit.
    for i in 1 2 3 4 5 ; do
      trace "Waiting $APP_NAME (pid $pid) to die..."
      status || break
      sleep 1
    done
    if status ; then
      if [ "$KILL_ON_STOP_TIMEOUT" -eq 1 ] ; then
        trace "Timeout reached. Killing $APP_NAME (pid $pid) with SIGKILL.  This may result in data loss."
        kill -KILL $pid
        emit "$APP_NAME killed with SIGKILL."
      else
        emit "$APP_NAME stop failed; still running."
      fi
    else
      emit "$APP_NAME stopped."
    fi
  fi
}

status() {
  if [ -f "$PID_FILE" ] ; then
    pid=$(cat "$PID_FILE")
    if ps -p $pid > /dev/null 2> /dev/null ; then
      # process by this pid is running.
      # It may not be our pid, but that's what you get with just pidfiles.
      # TODO(sissel): Check if this process seems to be the same as the one we
      # expect. It'd be nice to use flock here, but flock uses fork, not exec,
      # so it makes it quite awkward to use in this case.
      return 0
    else
      return 2 # program is dead but pid file exists
    fi
  else
    return 3 # program is not running
  fi
}

force_stop() {
  if status ; then
    stop
    status && kill -KILL $(cat "$PID_FILE")
  fi
}

case "$1" in
  force-start|start|stop|force-stop|restart)
    trace "Attempting '$1' on $APP_NAME"
    ;;
esac

case "$1" in
  force-start)
    PRESTART=no
    exec "$0" start
    ;;
  start)
    status
    code=$?
    if [ $code -eq 0 ]; then
      emit "$APP_NAME is already running"
      exit $code
    else
      start
      exit $?
    fi
    ;;
  stop) stop ;;
  force-stop) force_stop ;;
  status)
    status
    code=$?
    if [ $code -eq 0 ] ; then
      emit "$APP_NAME is running"
    else
      emit "$APP_NAME is not running"
    fi
    exit $code
    ;;
  restart)

    stop && start
    ;;
  *)
    echo "Usage: $0 {start|force-start|stop|force-stop|status|restart}" >&2
    exit 3
  ;;
esac

exit $?