ucarp.init

   1 #!/bin/sh
   2 #
   3 # ucarp         Start/stop the UCARP daemon.
   4 #
   5 # chkconfig:    2345 11 89
   6 #
   7 # description:  UCARP is Common Address Redundancy Protocol (CARP) \
   8 #               for Unix
   9 #
  10
  11 # Get service config
  12 [ -f /etc/sysconfig/ucarp ] && . /etc/sysconfig/ucarp
  13
  14 CONFIG_VIRTUAL_IPS=$VIRTUAL_IPS
  15
  16 [ -n "$2" ] && VIRTUAL_IPS="$2"
  17
  18 # no virtual IPs. exit silently
  19 if [ -z "$VIRTUAL_IPS" ]; then
  20         case "$1" in
  21         start|stop|restart|reload|force-reload)
  22                 exit 0
  23                 ;;
  24         esac
  25 fi
  26
  27 # Source function library
  28 . /etc/rc.d/init.d/functions
  29
  30 # Source networking configuration.
  31 . /etc/sysconfig/network
  32
  33 # Check that networking is up.
  34 if is_yes "${NETWORKING}"; then
  35         if [ ! -f /var/lock/subsys/network -a "$1" != stop -a "$1" != status ]; then
  36                 msg_network_down UCARP
  37                 exit 1
  38         fi
  39 else
  40         exit 0
  41 fi
  42
  43 # check if the virtual ip $1 s up
  44 vipup() {
  45         local vip="$1"
  46         local pidfile=/var/run/ucarp/$vip.pid
  47         local pid=$(cat $pidfile 2>/dev/null)
  48         kill -0 $pid 2>/dev/null
  49         return $?
  50 }
  51
  52 # check if all the configured virtual IPs are up
  53 vipsup() {
  54         ret=0
  55         for vip in $CONFIG_VIRTUAL_IPS; do
  56                 vipup $vip && continue
  57                 ret=1
  58         done
  59         return $ret
  60 }
  61
  62 # check if any of the configured interfaces is up
  63 anyvipsup() {
  64         ret=1
  65         for vip in $CONFIG_VIRTUAL_IPS; do
  66                 vipup $vip && return 0
  67         done
  68         return $ret
  69 }
  70
  71 start() {
  72         # Check if the service is already running?
  73         if ! vipsup; then
  74                 msg_starting "UCARP"; started
  75                 for vip in $VIRTUAL_IPS; do
  76                         config="/etc/ucarp/$vip.conf"
  77                         if [ ! -f "$config" ]; then
  78                                 nls "Invalid virtual IP \`%s': missing config: %s" $vip "$config"
  79                                 fail
  80                                 RET=1
  81                         else
  82                                 UCARP_OPTS=""
  83                                 . $config
  84                                 show "Starting UCARP for virtual IP %s" "$vip"
  85                                 if vipup $vip; then
  86                                         started
  87                                         continue
  88                                 fi
  89                                 # Needed for makepid work
  90                                 RC_LOGGING=no
  91                                 daemon --makepid --fork --pidfile /var/run/ucarp/$vip.pid \
  92                                         /usr/sbin/ucarp --addr=${vip}  ${UCARP_OPTS}
  93                                 RET=$?
  94                         fi
  95                         [ $RETVAL -eq 0 ] && RETVAL=$RET
  96                 done
  97                 [ $RETVAL -eq 0 ] && touch /var/lock/subsys/ucarp
  98         else
  99                 msg_already_running "UCARP"
 100         fi
 101 }
 102
 103 stop() {
 104         if anyvipsup; then
 105                 # Stop daemons.
 106                 msg_stopping "UCARP"; started
 107                 for vip in $VIRTUAL_IPS; do
 108                         pidfile=/var/run/ucarp/$vip.pid
 109                         [ -f "$pidfile" ] || continue
 110                         pid=`cat "$pidfile"`
 111                         show "Stopping UCARP for virtual IP %s" "$vip"; busy
 112                         killproc --pidfile "$pidfile" || err=1
 113                         rm -f "$pidfile" >/dev/null 2>&1
 114                 done
 115                 anyvipsup || rm -f /var/lock/subsys/ucarp >/dev/null 2>&1
 116         else
 117                 msg_not_running "UCARP"
 118         fi
 119 }
 120
 121 RETVAL=0
 122 # See how we were called.
 123 case "$1" in
 124   start)
 125         start
 126         ;;
 127   stop)
 128         stop
 129         ;;
 130   reload|force-reload)
 131         if vipsup; then
 132                 msg_reloading "UCARP"; started
 133                 for vip in $VIRTUAL_IPS; do
 134                         show "Reloading UCARP for virtual IP %s" "$vip"
 135                         killproc --pidfile ucarp/$vip.pid ucarp -HUP
 136                         [ $? -ne 0 -a $RETVAL -eq 0 ] && RETVAL=7
 137                 done
 138         else
 139                 msg_not_running "UCARP"
 140                 exit 7
 141         fi
 142         ;;
 143   restart)
 144         stop
 145         sleep 1
 146         start
 147         exit $?
 148         ;;
 149   status)
 150         nls "Configured virtual IPs:"
 151         echo " $VIRTUAL_IPS"
 152         nls "Currently active virtual IPs:"
 153         for pidfile in /var/run/ucarp/*.pid; do
 154                 [ -f "$pidfile" ] || continue
 155                 vip=${pidfile#/var/run/ucarp/}
 156                 vip=${vip%.pid}
 157                 vipup $vip && echo -n " $vip($(cat $pidfile))"
 158         done
 159         echo ""
 160         vipsup
 161         exit $?
 162         ;;
 163   *)
 164         msg_usage "$0 {start|stop|restart|reload|force-reload|status}"
 165         exit 3
 166         ;;
 167 esac
 168
 169 exit $RETVAL