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Init script for Graphite carbon-cache
#! /bin/sh
### BEGIN INIT INFO
# Provides: carbon-cache
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: carbon-cache init script
# Description: An init script for Graphite's carbon-cache daemon.
### END INIT INFO
# Author: Jeremy Chalmer
#
# This init script was written for Ubuntu 11.10 using start-stop-daemon.
#
# Note: Make sure you set the USER field in /opt/graphite/conf/carbon.conf to be the same
# user that owns the /opt/graphite/storage/ folder. Carbon-cache will be invoked as that
# username on start.
#
# Enable with update-rc.d carbon-cache defaults
# Source init-functions:
#source /lib/lsb/init-functions
. /lib/lsb/init-functions
# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
# Path to Graphite
GRAPHITE_HOME=/opt/graphite
# Name of executable daemon
NAME=carbon-cache
DESC=carbon-cache
#Carbon has its own logging facility, by default in /opt/graphite/storage/log/carbon-cache-*
# Path to Executable
DAEMON=$GRAPHITE_HOME/bin/carbon-cache.py
# NOTE: This is a hard-coded PID file, based on carbon-cache.py. If you have more the one carbon-cache
# instance running on this machine, you'll need to figure out a better way to calculate the PID file.
PIDFILE=/opt/graphite/storage/carbon-cache-a.pid
SCRIPTNAME=/etc/init.d/$NAME
# Exit if the package is not installed
if [ ! -x "$DAEMON" ]; then {
echo "Couldn't find $DAEMON or not executable"
exit 99
}
fi
# Load the VERBOSE setting and other rcS variables
[ -f /etc/default/rcS ] && . /etc/default/rcS
#
# Function that starts the daemon/service
#
do_start()
{
# Return
# 0 if daemon has been started
# 1 if daemon was already running
# 2 if daemon could not be started
# Test to see if the daemon is already running - return 1 if it is.
start-stop-daemon --start --pidfile $PIDFILE \
--exec $DAEMON --test -- start > /dev/null || return 1
# Start the daemon for real, return 2 if failed
start-stop-daemon --start --pidfile $PIDFILE \
--exec $DAEMON -- start > /dev/null || return 2
}
#
# Function that stops the daemon/service
#
do_stop() {
# Return
# 0 if daemon has been stopped
# 1 if daemon was already stopped
# 2 if daemon could not be stopped
# other if a failure occurred
log_daemon_msg "Stopping $DESC" "$NAME"
start-stop-daemon --stop --signal 2 --retry 5 --quiet --pidfile $PIDFILE
RETVAL="$?"
[ "$RETVAL" = 2 ] && return 2
# Delete the exisitng PID file
if [ -e "$PIDFILE" ]; then {
rm $PIDFILE
}
fi
return "$RETVAL"
}
# Display / Parse Init Options
case "$1" in
start)
[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
do_start
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
stop)
[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
do_stop
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
restart)
log_daemon_msg "Restarting $DESC" "$NAME"
do_stop
case "$?" in
0|1)
do_start
case "$?" in
0) log_end_msg 0 ;;
1) log_end_msg 1 ;; # Old process is still running
*) log_end_msg 1 ;; # Failed to start
esac
;;
*)
# Failed to stop
log_end_msg 1
;;
esac
;;
status)
if [ -s $PIDFILE ]; then
pid=`cat $PIDFILE`
kill -0 $pid >/dev/null 2>&1
if [ "$?" = "0" ]; then
echo "$NAME is running: pid $pid."
RETVAL=0
else
echo "Couldn't find pid $pid for $NAME."
RETVAL=1
fi
else
echo "$NAME is stopped (no pid file)."
RETVAL=1
fi
;;
*)
echo "Usage: $SCRIPTNAME {start|stop|restart|status}" >&2
exit 3
;;
esac
:
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