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Ruby unicorn init.d script for Debian
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| #!/bin/sh | |
| ### BEGIN INIT INFO | |
| # Provides: unicorn | |
| # Required-Start: $all | |
| # Required-Stop: $all | |
| # Default-Start: 2 3 4 5 | |
| # Default-Stop: 0 1 6 | |
| # Short-Description: starts the unicorn app server | |
| # Description: starts unicorn using start-stop-daemon | |
| ### END INIT INFO | |
| # Load the VERBOSE setting and other rcS variables | |
| . /lib/init/vars.sh | |
| # Define LSB log_* functions. | |
| # Depend on lsb-base (>= 3.0-6) to ensure that this file is present. | |
| . /lib/lsb/init-functions | |
| RBENV_ROOT=/opt/rbenv | |
| PATH=/opt/rbenv/shims:/opt/rbenv/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/sbin | |
| DESC="Unicorn server" | |
| NAME=$(basename $0) | |
| DAEMON=$(which unicorn) | |
| #set -x | |
| [ -x "$DAEMON" ] || exit 0 | |
| # Read configuration variable file if it is present | |
| config=/etc/default/$NAME | |
| if [ -f $config ]; then | |
| source $config | |
| else | |
| echo "FATAL: $config does not exist" | |
| exit 1 | |
| fi | |
| unset config | |
| # | |
| # 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 $PID --chuid $USER --chdir $APP_ROOT --exec $DAEMON --test > /dev/null \ | |
| || return 1 | |
| start-stop-daemon --start --quiet --pidfile $PID --chuid $USER --chdir $APP_ROOT --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 $PID | |
| RETVAL="$?" | |
| [ "$RETVAL" = 2 ] && return 2 | |
| # Ensure the pidfile is cleared | |
| rm -f $PID | |
| return "$RETVAL" | |
| } | |
| # | |
| # Function that sends a SIGHUP to the daemon/service | |
| # | |
| do_reload() { | |
| start-stop-daemon --stop --signal HUP --quiet --pidfile $PID | |
| return 0 | |
| } | |
| # | |
| # Function that sends a SIGUSR2 to the daemon/service | |
| # | |
| do_graceful_reload() { | |
| start-stop-daemon --stop --signal USR2 --quiet --pidfile $PID | |
| 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 -p $PID "$DAEMON" "$NAME" && exit 0 || exit $? | |
| ;; | |
| reload) | |
| log_daemon_msg "Reloading $DESC" "$NAME" | |
| do_reload | |
| log_end_msg $? | |
| ;; | |
| graceful-reload|graceful-restart) | |
| log_daemon_msg "Gracefully reloading $DESC" "$NAME" | |
| do_graceful_reload | |
| log_end_msg $? | |
| ;; | |
| 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 | |
| ;; | |
| *) | |
| echo "Usage: $SCRIPTNAME {start|stop|status|restart|graceful-reload|reload}" >&2 | |
| exit 3 | |
| ;; | |
| esac | |
| : |
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