I have a Ghost blog installed on a Digital Ocean droplet on an Ubuntu server. I am deploying updates to this via Github using the node module Hookshot. Due to how Ghost works, I need to restart the Ghost service each time an update is deployed (so new templates can be seen in the backoffice). I have this hookshot script:
var hookshot = require('hookshot');
hookshot('refs/heads/master', 'git pull origin master && service ghost restart').listen(9001);
However, each time the Ghost service restarts it kills Forever, I can see this in the Forever log:
error: Forever detected script was killed by signal: SIGKILL
Any ideas how I can fix this? I've seen a few posts where people recommend something in the crontab but i'm pretty sure the server isn't actually rebooting. I would guess that the Node daemon is being killed which in turn kills Forever.
I've tried appending && forever start /var/www/ghost/deploy_listener.js to the hookshot script but this doesn't work - maybe as it's not waiting for the restart to complete.
EDIT I've tracked down the shell script which is called as part of the ghost service:
#! /bin/sh
### BEGIN INIT INFO
# Provides: ghost
# Required-Start: $network $syslog
# Required-Stop: $network $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Ghost Blogging Platform
# Description: Ghost: Just a blogging platform
### END INIT INFO
# Author: Joachim Pileborg <arrow@pileborg.se>
# Do NOT "set -e"
# PATH should only include /usr/ if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="Ghost"
NAME=ghost
GHOST_ROOT=/var/www/ghost
GHOST_GROUP=ghost
GHOST_USER=ghost
DAEMON=/usr/bin/node
DAEMON_ARGS="$GHOST_ROOT/index.js"
PIDFILE=/var/opt/ghost/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME
export NODE_ENV=production
# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0
# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME
# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh
# I like to know what is going on
VERBOSE=yes
# Define LSB log_* functions.
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions
#
# Function that starts the daemon/service
#
do_start()
{
# Set up folder structure
mkdir -p /var/opt/ghost
mkdir -p /var/opt/ghost/run
chown -R ghost:ghost /var/opt/ghost
# 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 \
--chuid $GHOST_USER:$GHOST_GROUP --chdir $GHOST_ROOT --background \
--pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
|| return 1
start-stop-daemon --start --quiet \
--chuid $GHOST_USER:$GHOST_GROUP --chdir $GHOST_ROOT --background \
--pidfile $PIDFILE --exec $DAEMON -- $DAEMON_ARGS \
|| 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.
}
#
# 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 --name $NAME
RETVAL="$?"
[ "$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=0/30/KILL/5 \
--exec $DAEMON
[ "$?" = 2 ] && return 2
# Many daemons don't delete their pidfiles when they exit.
rm -f $PIDFILE
return "$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 --signal 1 --quiet --pidfile $PIDFILE \
--name $NAME
return 0
}
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) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
;;
status)
status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
;;
#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 $DESC" "$NAME"
do_stop
case "$?" in
0|1)
do_start
do_start
case "$?" 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
;;
*)
#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
exit 3
;;
esac
:
I can add the forever call to the "# Add code here" section but this is called twice for some reason, and i'd rather work out precisely what's going wrong.