nginx.init

   1 #!/bin/sh
   2 #
   3 # nginx Nginx Web Server (@type@ version)
   4 #
   5 # chkconfig:    345 85 15
   6 # description:  Nginx is an HTTP(S) server, HTTP(S) reverse \
   7 #               proxy and IMAP/POP3 proxy server
   8 # processname:  nginx
   9 # pidfile:      /var/run/nginx.pid
  10 # config:       /etc/nginx/nginx.conf
  11
  12 # Source function library
  13 . /etc/rc.d/init.d/functions
  14
  15 # Source networking configuration.
  16 . /etc/sysconfig/network
  17
  18 nginx="/usr/sbin/nginx"
  19 svname="nginx"
  20 prog=${nginx##*/}
  21
  22 sysconfig="/etc/sysconfig/$prog"
  23 lockfile="/var/lock/subsys/$prog"
  24 pidfile="/var/run/$prog.pid"
  25
  26 NGINX_CONF_FILE="/etc/nginx/$prog.conf"
  27
  28 # Get service config
  29 [ -f $sysconfig ] && . $sysconfig
  30
  31 # Check that networking is up.
  32 if is_yes "${NETWORKING}"; then
  33         if [ ! -f /var/lock/subsys/network -a "$1" != stop -a "$1" != status ]; then
  34                 msg_network_down "$svname"
  35                 exit 1
  36         fi
  37 else
  38         exit 0
  39 fi
  40
  41 # configtest itself
  42 # must return non-zero if check failed
  43 # output is discarded if checkconfig is ran without details
  44 configtest() {
  45         $nginx -t -c $NGINX_CONF_FILE
  46 }
  47
  48 # wrapper for configtest
  49 checkconfig() {
  50         local details=${1:-0}
  51
  52         if [ $details = 1 ]; then
  53                 # run config test and display report (status action)
  54                 show "Checking %s configuration" "$svname"; busy
  55                 local out
  56                 out=$(configtest 2>&1)
  57                 RETVAL=$?
  58                 if [ $RETVAL = 0 ]; then
  59                         ok
  60                 else
  61                         fail
  62                 fi
  63                 [ "$out" ] && echo >&2 "$out"
  64         else
  65                 # run config test and abort with nice message if failed
  66                 # (for actions checking status before action).
  67                 configtest >/dev/null 2>&1
  68                 RETVAL=$?
  69                 if [ $RETVAL != 0 ]; then
  70                         show "Checking %s configuration" "$svname"; fail
  71                         nls 'Configuration test failed. See details with %s "checkconfig"' $0
  72                         exit $RETVAL
  73                 fi
  74         fi
  75 }
  76
  77 start() {
  78         # Check if the service is already running?
  79         if [ ! -f $lockfile ]; then
  80                 checkconfig
  81                 msg_starting "$svname"
  82                 daemon $nginx -c $NGINX_CONF_FILE
  83                 RETVAL=$?
  84                 [ $RETVAL -eq 0 ] && touch $lockfile
  85         else
  86                 msg_already_running "$svname"
  87         fi
  88 }
  89
  90 stop() {
  91         local oldbin_pidfile="${pidfile}.oldbin"
  92
  93         # Stop daemons.
  94         if [ -f $lockfile ]; then
  95                 if [ -f $oldbin_pidfile ] && [ -f $pidfile ]; then
  96                         msg_stopping "$svname (old process)"
  97                         killproc -p $oldbin_pidfile $prog -TERM
  98                 fi
  99                 msg_stopping "$svname"
 100                 killproc -p $pidfile $prog
 101                 RETVAL=$?
 102                 rm -f $lockfile $pidfile >/dev/null 2>&1
 103         else
 104                 msg_not_running "$svname"
 105         fi
 106 }
 107
 108 reload() {
 109         if [ -f $lockfile ]; then
 110                 checkconfig
 111                 msg_reloading "$svname"
 112                 killproc -p $pidfile $prog -HUP
 113                 RETVAL=$?
 114         else
 115                 msg_not_running "$svname"
 116                 RETVAL=7
 117         fi
 118 }
 119
 120 condrestart() {
 121         if [ ! -f $lockfile ]; then
 122                 msg_not_running "$svname"
 123                 RETVAL=$1
 124                 return
 125         fi
 126
 127         checkconfig
 128         stop
 129         start
 130 }
 131
 132 # Upgrade the binary with no downtime.
 133 # http://nginx.org/en/docs/control.html#upgrade
 134 # TODO: handle revert back on failed upgrade
 135 upgrade() {
 136         local oldbin_pidfile="${pidfile}.oldbin" retry
 137
 138         checkconfig
 139         show "Upgrading $svname"
 140         killproc -p $pidfile $prog -USR2
 141         RETVAL=$?
 142
 143         # wait for 3m
 144         retry=720
 145         while [ $retry -gt 0 ]; do
 146                 if [ -f $oldbin_pidfile ] && [ -f $pidfile ]; then
 147                         show "Upgrade: stopping old workers"
 148                         killproc -p $oldbin_pidfile $prog -WINCH
 149                         show "Upgrade: stopping old master process"
 150                         killproc -p $oldbin_pidfile $prog -QUIT
 151                         return 0
 152                 else
 153                         usleep 250000
 154                         retry=$(($retry -1))
 155                 fi
 156         done
 157
 158         show "Upgrade: stopping old process"; fail
 159         nls 'old process pid file was not found'
 160         return 1
 161 }
 162
 163 # Tell nginx to reopen logs
 164 # http://nginx.org/en/docs/control.html#logs
 165 reopen_logs() {
 166         local oldbin_pidfile="${pidfile}.oldbin"
 167
 168         if [ -f $oldbin_pidfile ]; then
 169                 show "Reopening $svname (oldbin) logs"
 170                 killproc -p $oldbin_pidfile $prog -USR1
 171         fi
 172
 173         show "Reopening $svname logs"
 174         killproc -p $pidfile $prog -USR1
 175 }
 176
 177 RETVAL=0
 178 # See how we were called.
 179 case "$1" in
 180   start)
 181         start
 182         ;;
 183   stop)
 184         stop
 185         ;;
 186   restart)
 187         checkconfig
 188         stop
 189         start
 190         ;;
 191   try-restart)
 192         condrestart 0
 193         ;;
 194   reload|graceful)
 195         reload
 196         ;;
 197   force-reload|upgrade)
 198         upgrade
 199         ;;
 200   reopen-logs)
 201         reopen_logs
 202         ;;
 203   checkconfig|configtest)
 204         checkconfig 1
 205         ;;
 206   status)
 207         status --pidfile $pidfile $prog
 208         RETVAL=$?
 209         ;;
 210   *)
 211         msg_usage "$0 {start|stop|restart|try-restart|reload|force-reload|graceful|reopen-logs|checkconfig|status}"
 212         exit 3
 213         ;;
 214 esac
 215
 216 exit $RETVAL