# Try to extract nginx pidfile PID=$(cat /etc/nginx/nginx.conf | grep -Ev '^\s*#' | awk 'BEGIN { RS="[;{}]" } { if ($1 == "pid") print $2 }' | head -n1) if [ -z "$PID" ]; then PID=/run/nginx.pid fi
if [ -n "$ULIMIT" ]; then # Set ulimitif it is setin /etc/default/nginx ulimit $ULIMIT fi
start_nginx() { # Start the daemon/service # # Returns: # 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 --exec $DAEMON --test > /dev/null \ || return 1 start-stop-daemon --start --quiet --pidfile $PID --exec $DAEMON -- \ $DAEMON_OPTS 2>/dev/null \ || return 2 }
test_config() { # Test the nginx configuration $DAEMON -t $DAEMON_OPTS >/dev/null 2>&1 }
stop_nginx() { # Stops the daemon/service # # Return # 0 if daemon has been stopped # 1 if daemon was already stopped # 2 if daemon could not be stopped # other if a failure occurred start-stop-daemon --stop --quiet --retry=$STOP_SCHEDULE --pidfile $PID --name $NAME RETVAL="$?" sleep 1 return "$RETVAL" }
reload_nginx() { # Function that sends a SIGHUP to the daemon/service start-stop-daemon --stop --signal HUP --quiet --pidfile $PID --name $NAME return 0 }
upgrade_nginx() { # Online upgrade nginx executable # http://nginx.org/en/docs/control.html # # Return # 0 if nginx has been successfully upgraded # 1 if nginx is not running # 2 if the pid files were not created on time # 3 if the old master could not be killed if start-stop-daemon --stop --signal USR2 --quiet --pidfile $PID --name $NAME; then # Wait for both old and new master to write their pid file while [ ! -s "${PID}.oldbin" ] || [ ! -s "${PID}" ]; do cnt=`expr $cnt + 1` if [ $cnt -gt 10 ]; then return 2 fi sleep 1 done # Everything is ready, gracefully stop the old master if start-stop-daemon --stop --signal QUIT --quiet --pidfile "${PID}.oldbin" --name $NAME; then return 0 else return 3 fi else return 1 fi }
case "$1" in start) log_daemon_msg "Starting $DESC" "$NAME" start_nginx case "$?" in 0|1) log_end_msg 0 ;; 2) log_end_msg 1 ;; esac ;; stop) log_daemon_msg "Stopping $DESC" "$NAME" stop_nginx case "$?" in 0|1) log_end_msg 0 ;; 2) log_end_msg 1 ;; esac ;; restart) log_daemon_msg "Restarting $DESC" "$NAME"
# Check configuration before stopping nginx if ! test_config; then log_end_msg 1 # Configuration error exit $? fi
stop_nginx case "$?" in 0|1) start_nginx 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 ;; reload|force-reload) log_daemon_msg "Reloading $DESC configuration" "$NAME"
# Check configuration before stopping nginx # # This is not entirely correct since the on-disk nginx binary # may differ from the in-memory one, but that's not common. # We prefer to check the configuration and return an error # to the administrator. if ! test_config; then log_end_msg 1 # Configuration error exit $? fi
# Stop dance for nginx # ======================= # # ExecStop sends SIGSTOP (graceful stop) to the nginx process. # If, after 5s (--retry QUIT/5) nginx is still running, systemd takes control # and sends SIGTERM (fast shutdown) to the main process. # After another 5s (TimeoutStopSec=5), and if nginx is alive, systemd sends # SIGKILL to all the remaining processes in the process group (KillMode=mixed). # # nginx signals reference doc: # http://nginx.org/en/docs/control.html # [Unit] Description=A high performance web server and a reverse proxy server Documentation=man:nginx(8) After=network.target nss-lookup.target