Permalink
6a65054 Jun 8, 2016
103 lines (91 sloc) 1.97 KB
#!/bin/sh
set -e
### BEGIN INIT INFO
# Provides: unicorn
# Required-Start: $local_fs $network
# Required-Stop: $local_fs $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start/stop unicorn Rack app server
### END INIT INFO
# Example init script, this can be used with nginx, too,
# since nginx and unicorn accept the same signals.
# Feel free to change any of the following variables for your app:
TIMEOUT=${TIMEOUT-60}
APP_ROOT=/home/x/my_app/current
PID=$APP_ROOT/tmp/pids/unicorn.pid
CMD="/usr/bin/unicorn -D -c $APP_ROOT/config/unicorn.rb"
INIT_CONF=$APP_ROOT/config/init.conf
UPGRADE_DELAY=${UPGRADE_DELAY-2}
action="$1"
set -u
test -f "$INIT_CONF" && . $INIT_CONF
OLD="$PID.oldbin"
cd $APP_ROOT || exit 1
sig () {
test -s "$PID" && kill -$1 $(cat $PID)
}
oldsig () {
test -s "$OLD" && kill -$1 $(cat $OLD)
}
case $action in
start)
sig 0 && echo >&2 "Already running" && exit 0
$CMD
;;
stop)
sig QUIT && exit 0
echo >&2 "Not running"
;;
force-stop)
sig TERM && exit 0
echo >&2 "Not running"
;;
restart|reload)
sig HUP && echo reloaded OK && exit 0
echo >&2 "Couldn't reload, starting '$CMD' instead"
$CMD
;;
upgrade)
if oldsig 0
then
echo >&2 "Old upgraded process still running with $OLD"
exit 1
fi
cur_pid=
if test -s "$PID"
then
cur_pid=$(cat $PID)
fi
if test -n "$cur_pid" &&
kill -USR2 "$cur_pid" &&
sleep $UPGRADE_DELAY &&
new_pid=$(cat $PID) &&
test x"$new_pid" != x"$cur_pid" &&
kill -0 "$new_pid" &&
kill -QUIT "$cur_pid"
then
n=$TIMEOUT
while kill -0 "$cur_pid" 2>/dev/null && test $n -ge 0
do
printf '.' && sleep 1 && n=$(( $n - 1 ))
done
echo
if test $n -lt 0 && kill -0 "$cur_pid" 2>/dev/null
then
echo >&2 "$cur_pid still running after $TIMEOUT seconds"
exit 1
fi
exit 0
fi
echo >&2 "Couldn't upgrade, starting '$CMD' instead"
$CMD
;;
reopen-logs)
sig USR1
;;
*)
echo >&2 "Usage: $0 <start|stop|restart|upgrade|force-stop|reopen-logs>"
exit 1
;;
esac