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#!/bin/sh | |
# ------------------------------------------------------------------------------ | |
# SOME INFOS : fairly standard (debian) init script. | |
# Note that node doesn't create a PID file (hence --make-pidfile) | |
# has to be run in the background (hence --background) | |
# and NOT as root (hence --chuid) | |
# | |
# MORE INFOS : INIT SCRIPT http://www.debian.org/doc/debian-policy/ch-opersys.html#s-sysvinit | |
# INIT-INFO RULES http://wiki.debian.org/LSBInitScripts | |
# INSTALL/REMOVE http://www.debian-administration.org/articles/28 | |
# ------------------------------------------------------------------------------ | |
# # | |
# BEGIN <MODIFY TO REFLECT YOUR SETTINGS> # | |
# # | |
# | |
# 1) Don't forget to also modify the COMMENTED fields in the "### BEGIN INIT INFO" | |
# below (don't uncomment them) if you wish to install system-wide with update-rc.d | |
# eg: provides, Short-Description, Description | |
# | |
# 2) in case you have different node.js servers running, each init.d script should | |
# (obviously) have a UNIQUE BASE name so that PIDS do not conflict | |
# --> name them accordingly | |
# eg: node_static_server, node_express1, node_load_balancer.sh... | |
# | |
# 3) copy the renamed/modified script(s) to /etc/init.d | |
# chmod 755, | |
# | |
# 4) if you wish the Daemon to be lauched at boot / stopped at shutdown : | |
# INSTALL : update-rc.d scriptname defaults | |
# (UNINSTALL : update-rc.d -f scriptname remove) | |
# | |
# 5) based on : Debian /etc/init.d/skeleton | |
# modified by : Peter Host (www.oghme.com) | |
# ______________________________________________________________________________ | |
### BEGIN INIT INFO | |
# Provides: node_debian_init | |
# Required-Start: $remote_fs $named $syslog | |
# Required-Stop: $remote_fs $named $syslog | |
# Default-Start: 2 3 4 5 | |
# Default-Stop: 0 1 6 | |
# Short-Description: DEBIAN initscript for node.js servers/apps | |
# Description: ex : proxy server is a node.js http server listening on | |
# port 8080 (relayed from 80 by iptables). It balances | |
# http requests between the main nodejs server | |
# (nodejs.mydomain.com:8000), the static file-server | |
# (static.mydomain.com) and the legacy apache server | |
# (apache.mydomain.com) and possibly other servers | |
# place this file in /etc/init.d. | |
### END INIT INFO | |
# Author: My Name <myname@domain.tld> | |
# | |
# Please remove the "Author" lines above and replace them | |
# with your own name if you copy and modify this script. | |
# ______________________________________________________________________________ | |
# | |
# PATH should only include /usr/* if it runs after the mountnfs.sh script | |
PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin # modify if you need | |
DAEMON_ARGS="/path/to/app.js" # path to your node.js server/app | |
# NB: don't use ~/ in path | |
DESC="node.js http server" # whatever fancy description you like | |
NODEUSER=myuser:mygroup # USER who OWNS the daemon process (no matter whoever runs the init script) | |
# user:group (if no group is specified, the primary GID for that user is used) | |
LOCAL_VAR_RUN=/usr/local/var/run # in case the init script is run by non-root user, you need to | |
# indicate a directory writeable by $NODEUSER to store the PID file | |
# NB : 1) /usr/local/var/run does not exist by DEFAULT. Either create it | |
# or choose one of your own liking. | |
# 2) node, npm,... are best NOT installed/run as ROOT. | |
# (see here: https://github.com/isaacs/npm/blob/master/README.md) | |
NAME=node # name of the node.js executable | |
DAEMON=/usr/local/bin/$NAME # this SHOULD POINT TO where your node executable is | |
# | |
# # | |
# END </MODIFY TO REFLECT YOUR SETTINGS> # | |
# (Nothing else to modify from this point on...) # | |
# ------------------------------------------------------------------------------ | |
# Do NOT "set -e" | |
[ $UID -eq "0" ] && LOCAL_VAR_RUN=/var/run # in case this script is run by root, override user setting | |
THIS_ARG=$0 | |
INIT_SCRIPT_NAME=`basename $THIS_ARG` | |
[ -h $THIS_ARG ] && INIT_SCRIPT_NAME=`basename $(readlink $THIS_ARG)` # in case of symlink | |
INIT_SCRIPT_NAME_NOEXT=${INIT_SCRIPT_NAME%.*} | |
PIDFILE="$LOCAL_VAR_RUN/$INIT_SCRIPT_NAME_NOEXT.pid" | |
SCRIPTNAME=/etc/init.d/$INIT_SCRIPT_NAME | |
# Exit if the package is not installed | |
[ -x "$DAEMON" ] || { echo "can't find Node.js ($DAEMON)" >&2; exit 0; } | |
# Exit if the 'run' folder is not present | |
[ -d "$LOCAL_VAR_RUN" ] || { echo "Directory $LOCAL_VAR_RUN does not exist. Modify the '$INIT_SCRIPT_NAME_NOEXT' init.d script ($THIS_ARG) accordingly" >&2; exit 0; } | |
# Read configuration variable file if it is present | |
[ -r /etc/default/$INIT_SCRIPT_NAME ] && . /etc/default/$INIT_SCRIPT_NAME | |
# Load the VERBOSE setting and other rcS variables | |
. /lib/init/vars.sh | |
# Define LSB log_* functions. | |
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present. | |
. /lib/lsb/init-functions | |
# uncomment to override system setting | |
# VERBOSE=yes | |
# | |
# 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 | |
start-stop-daemon --start --quiet --pidfile $PIDFILE --chuid $NODEUSER --background --exec $DAEMON --test > /dev/null \ | |
|| { [ "$VERBOSE" != no ] && log_daemon_msg " ---> Daemon already running $DESC" "$INIT_SCRIPT_NAME_NOEXT"; return 1; } | |
start-stop-daemon --start --quiet --chuid $NODEUSER --make-pidfile --pidfile $PIDFILE --background --exec $DAEMON -- \ | |
$DAEMON_ARGS \ | |
|| { [ "$VERBOSE" != no ] && log_daemon_msg " ---> could not be start $DESC" "$INIT_SCRIPT_NAME_NOEXT"; return 2; } | |
# Add code here, if necessary, that waits for the process to be ready | |
# to handle requests from services started subsequently which depend | |
# on this one. As a last resort, sleep for some time. | |
[ "$VERBOSE" != no ] && log_daemon_msg " ---> started $DESC" "$INIT_SCRIPT_NAME_NOEXT" | |
} | |
# | |
# 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 | |
start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --chuid $NODEUSER --name $DAEMON | |
RETVAL="$?" | |
#[ "$VERBOSE" != no ] && [ "$RETVAL" = 1 ] && log_daemon_msg " ---> SIGKILL failed => hardkill $DESC" "$INIT_SCRIPT_NAME_NOEXT" | |
[ "$RETVAL" = 2 ] && return 2 | |
# Wait for children to finish too if this is a daemon that forks | |
# and if the daemon is only ever run from this initscript. | |
# If the above conditions are not satisfied then add some other code | |
# that waits for the process to drop all resources that could be | |
# needed by services started subsequently. A last resort is to | |
# sleep for some time. | |
start-stop-daemon --stop --quiet --oknodo --retry=0/3/KILL/5 --pidfile $PIDFILE --chuid $NODEUSER --exec $DAEMON -- $DAEMON_ARGS | |
[ "$?" = 2 ] && return 2 | |
# Many daemons don't delete their pidfiles when they exit. | |
rm -f $PIDFILE | |
[ "$VERBOSE" != no ] && [ "$RETVAL" = 1 ] && log_daemon_msg " ---> $DESC not running" "$INIT_SCRIPT_NAME_NOEXT" | |
[ "$VERBOSE" != no -a "$RETVAL" = 0 ] && log_daemon_msg " ---> $DESC stopped" "$INIT_SCRIPT_NAME_NOEXT" | |
return "$RETVAL" | |
} | |
# | |
# Function that sends a SIGHUP to the daemon/service | |
# | |
do_reload() { | |
# | |
# If the daemon can reload its configuration without | |
# restarting (for example, when it is sent a SIGHUP), | |
# then implement that here. | |
# | |
start-stop-daemon --stop --quiet --signal 1 --pidfile $PIDFILE --chuid $NODEUSER --name $NAME | |
return 0 | |
} | |
# | |
# Function that returns the daemon | |
# | |
do_status() { | |
# | |
# http://refspecs.freestandards.org/LSB_3.1.1/LSB-Core-generic/LSB-Core-generic/iniscrptact.html | |
# 0 program is running or service is OK | |
# 1 program is dead and /var/run pid file exists | |
# (2 program is dead and /var/lock lock file exists) (not used here) | |
# 3 program is not running | |
# 4 program or service status is unknown | |
RUNNING=$(running) | |
# $PIDFILE corresponds to a live $NAME process | |
ispidactive=$(pidof $NAME | grep `cat $PIDFILE 2>&1` >/dev/null 2>&1) | |
ISPIDACTIVE=$? | |
if [ -n "$RUNNING" ]; then | |
if [ $ISPIDACTIVE ]; then | |
log_success_msg "$INIT_SCRIPT_NAME_NOEXT (launched by $USER) (--chuid $NODEUSER) is running" | |
exit 0 | |
fi | |
else | |
if [ -f $PIDFILE ]; then | |
log_success_msg "$INIT_SCRIPT_NAME_NOEXT (launched by $USER) (--chuid $NODEUSER) is not running, phantom pidfile $PIDFILE" | |
exit 1 | |
else | |
log_success_msg "no instance launched by $USER, of $INIT_SCRIPT_NAME_NOEXT (--chuid $NODEUSER) found" | |
exit 3 | |
fi | |
fi | |
} | |
running() { | |
RUNSTAT=$(start-stop-daemon --start --quiet --pidfile $PIDFILE --chuid $NODEUSER --background --exec $DAEMON --test > /dev/null) | |
if [ "$?" = 1 ]; then | |
echo y | |
fi | |
} | |
case "$1" in | |
start) | |
[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$INIT_SCRIPT_NAME_NOEXT" | |
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 $DESC" "$INIT_SCRIPT_NAME_NOEXT" | |
do_stop | |
case "$?" in | |
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;; | |
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;; | |
esac | |
;; | |
#reload|force-reload) | |
# | |
# If do_reload() is not implemented then leave this commented out | |
# and leave 'force-reload' as an alias for 'restart'. | |
# | |
#log_daemon_msg "Reloading $DESC" "$NAME" | |
#do_reload | |
#log_end_msg $? | |
#;; | |
restart|force-reload) | |
# | |
# If the "reload" option is implemented then remove the | |
# 'force-reload' alias | |
# | |
log_daemon_msg "Restarting $DESC" "$INIT_SCRIPT_NAME_NOEXT" | |
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) | |
do_status | |
;; | |
*) | |
#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2 | |
echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2 | |
exit 3 | |
;; | |
esac | |
exit 0 |
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