ipaddr.in

linux集群服务器软件代码包

#!/bin/sh
#
#	This script manages IP alias IP addresses
#
#	It can add an IP alias, or remove one.
#
#	usage: $0 {start|stop|status|monitor|meta-data}
#
#	The "start" arg adds an IP alias.
#
#	Surprisingly, the "stop" arg removes one.	:-)
#
#       OCF parameters are as below
#               OCF_RESKEY_ipaddr
#
export LC_ALL=C

prefix=@prefix@
exec_prefix=@exec_prefix@
HA_D=@sysconfdir@/ha.d
CONF_D=@sysconfdir@/ha.d/conf
. ${HA_D}/shellfuncs

IFCONFIG=@IFCONFIG@
IFCONFIG_A_OPT=@IFCONFIG_A_OPT@
VARLIB=@localstatedir@/lib/@HB_PKG@
VLDIR=$VARLIB/rsctmp/IPaddr
SENDARPPIDDIR=$VARLIB/rsctmp/send_arp
ROUTE=@ROUTE@
SENDARP=$HA_BIN/send_arp
FINDIF=$HA_BIN/findif
USAGE="usage: $0 {start|stop|status|monitor|meta-data}";
SYSTYPE="`uname -s`"
case "$SYSTYPE" in
    SunOS)
        # `uname -r` = 5.9 -> SYSVERSION = 9
        SYSVERSION="`uname -r | cut -d. -f 2`"
	;;
    Darwin)
	# Treat Darwin the same as the other BSD variants (matched as *BSD)
	SYSTYPE="${SYSTYPE}BSD"
	;;
    *)
        ;;
esac

#
#      Find out which alias serves the given IP address
#      The argument is an IP address, and its output
#      is an aliased interface name (e.g., "eth0:0").
#
find_interface_solaris() {

  ipaddr="$1";

  $IFCONFIG $IFCONFIG_A_OPT | nawk '{if ($0 ~ /.*: / && NR > 1) {print "\n"$0} else {print}}' |
  while read ifname linkstuff
  do
    : ifname = $ifname
    read inet addr junk
    : inet = $inet addr = $addr
    while
      read line && [ "X$line" != "X" ]
    do
      : Nothing
    done

    case $ifname in
      *:*)	;;
      *)	continue;;
    esac

    #  This doesn't look right for a box with multiple NICs.
    #  It looks like it always selects the first interface on
    #  a machine.  Yet, we appear to use the results for this case too...
    ifname=`echo "$ifname" | sed s'%:$%%'`

    case $addr in
      addr:$ipaddr)	echo $ifname; return 0;;
      $ipaddr)	echo $ifname; return 0;;
    esac
  done
  return 1
}

#
#	Find out which alias serves the given IP address
#	The argument is an IP address, and its output
#	is an aliased interface name (e.g., "eth0:0").
#
find_interface_generic() {

  ipaddr="$1";

  $IFCONFIG $IFCONFIG_A_OPT  |
  while read ifname linkstuff
  do
    : Read gave us ifname = $ifname

    read inet addr junk
    : Read gave us inet = $inet addr = $addr

    while
      read line && [ "X$line" != "X" ]
    do
      : Nothing
    done

    case $ifname in
      *:*)	;;
      *)	continue;;
    esac


    case $SYSTYPE in
      *BSD)
		$IFCONFIG | grep "$ipaddr" -B4 | grep "UP," | cut -d ":" -f 1
		return 0;;
      *)
    		: "comparing $ipaddr to $addr (from ifconfig)"
		case $addr in
		  addr:$ipaddr)	echo $ifname; return 0;;
		  $ipaddr)	echo $ifname; return 0;;
    		esac
		continue;;
    esac


  done
  return 1
}

#
#       Find out which alias serves the given IP address
#       The argument is an IP address, and its output
#       is an aliased interface name (e.g., "eth0:0").
#
find_interface() {
    case $SYSTYPE in
	SunOS)
	 	IF=`find_interface_solaris $BASEIP`
        ;;
      *)
	 	IF=`find_interface_generic $BASEIP`
       ;;
       esac

  echo $IF
  return 0;
}

#
# This routine should handle any type of interface, but has only been
# tested on ethernet-type NICs.
#
ifconfig2sendarp() {
	echo "$1" | sed "s%:%%g"
}

delete_route () {
  ipaddr="$1"

  case $SYSTYPE in
	SunOS)
		CMD=""
		;;
	*BSD)
		CMD="$ROUTE -n delete -host $ipaddr"
		;;

	*)	
		CMD="$ROUTE -n del -host $ipaddr"
		;;
  esac

  ha_log "info: $CMD"
  $CMD

  return $?
}

delete_interface () {
  ipaddr="$1"
  ifname="$2"

  case $SYSTYPE in
	SunOS)
		if [ "$SYSVERSION" -ge 8 ] ; then
		    CMD="$IFCONFIG $ifname unplumb"
		else
		    CMD="$IFCONFIG $ifname 0 down"
		fi
		;;
	*BSD)
		CMD="$IFCONFIG $ifname inet $ipaddr -alias"
		;;

	*)
		CMD="$IFCONFIG $ifname down"
		;;
  esac

  ha_log "info: $CMD"
  $CMD

  return $?
}


add_interface () {
  ipaddr="$1"
  ifinfo="$2"
  iface="$3"

  #
  #	On Linux the Alias is named ethx:y
  #	This will remove the "extra" interface Data 
  #	leaving us with just ethx
  #
  case $SYSTYPE in
    *BSD)
		IFEXTRA=""
		;;
    *)
		IFEXTRA=`echo "$ifinfo" | cut -f2-`
		;;
  esac

  case $SYSTYPE in
    SunOS)
		if [ "$SYSVERSION" -ge 8 ] ; then
		    $IFCONFIG $iface plumb
		    rc=$?
		    if [ $rc -ne 0 ] ; then
			echo "ERROR: '$IFCONFIG $iface plumb' failed."
			return $rc
		    fi
		fi
		CMD="$IFCONFIG $iface inet $ipaddr $IFEXTRA up"
		;;

    *BSD)
		CMD="$IFCONFIG $iface inet $ipaddr netmask 255.255.255.255 alias"
		;;
    *)		
    		CMD="$IFCONFIG $iface $ipaddr $IFEXTRA"	
		;;
  esac

  ha_log "info: $CMD"
  $CMD
  rc=$?

  case $rc in
    0)
    		;;
    *)
    		echo "ERROR: $CMD failed."
		;;
  esac

  return $rc
}

#      On Linux systems the (hidden) loopback interface may
#      conflict with the requested IP address. If so, this
#      unoriginal code will remove the offending loopback address
#      and save it in VLDIR so it can be added back in later
#      when the IPaddr is released.
#
remove_conflicting_loopback() {
	ipaddr="$1"
	ifname="$2"

	ha_log "info: Removing conflicting loopback $ifname."
	if
	  [ -d "$VLDIR/" ] || mkdir -p "$VLDIR/"
	then
	  : Directory $VLDIR now exists
	else
	  ha_log "ERROR: Could not create \"$VLDIR/\" conflicting" \
	  " loopback $ifname cannot be restored."
	fi
	if 
	  echo $ifname > "$VLDIR/$ipaddr"
	then
	  : Saved loopback information in $VLDIR/$ipaddr
	else
	  ha_log "ERROR: Could not save conflicting loopback $ifname." \
	  "it will not be restored."
	fi
	delete_interface "$ipaddr" "$ifname"
	# Forcibly remove the route (if it exists) to the loopback.
	delete_route "$ipaddr"
}

#      On Linux systems the (hidden) loopback interface may
#      need to be restored if it has been taken down previously
#      by remove_conflicting_loopback()
#
restore_loopback() {
	ipaddr="$1"

	if [ -s "$VLDIR/$ipaddr" ]; then
		ifname=`cat "$VLDIR/$ipaddr"`
		ha_log "info: Restoring loopback IP Address " \
			"$ipaddr on $ifname."
		add_interface "$ipaddr" "netmask 255.255.255.255" "$ifname"
		rm -f "$VLDIR/$ipaddr"
	fi
}

#
#	Remove the IP alias for the requested IP address...
#
ip_stop() {
  BASEIP=`echo $1 | sed s'%/.*%%'`
  SENDARPPIDFILE="$SENDARPPIDDIR/send_arp-$BASEIP"
  IF=`find_interface $BASEIP`

  if test -f "$SENDARPPIDFILE"
  then
  	cat "$SENDARPPIDFILE" | xargs kill
	rm -f "$SENDARPPIDFILE"
  fi

  case $SYSTYPE in
	*BSD)
		if $IFCONFIG $IFCONFIG_A_OPT | \
			grep "inet.*[: ]$BASEIP " >/dev/null 2>&1; then
			continue;
		else
			exit 0
		fi;;

	Linux|SunOS)
		if [ -z "$IF" ]; then
    			: Requested interface not in use
    			exit 0
		else
			case $IF in
			  lo*)
				: Requested interface is on loopback
				exit 0
				;;
			esac
  		fi;;
	*)
		if [ -z "$IF" ]; then
    			: Requested interface not in use
    			exit 0
  		fi;;
  esac

  if
    [ -x $HA_RCDIR/local_giveip ]
  then
    $HA_RCDIR/local_giveip $*
  fi

  delete_route "$BASEIP"
  delete_interface "$BASEIP" "$IF"
  rc=$?

  case $SYSTYPE in
	*BSD)	;;
	Linux|SunOS)
		restore_loopback "$BASEIP"
		# remove lock file...
		rm -f "$VLDIR/$IF";;
	
	*)	# remove lock file...
		rm -f "$VLDIR/$IF";;
  esac

  case $rc in
    	0) 
		ha_log "info: IP Address $BASEIP released"
		;;
    	*) 	
		ha_log "WARN: IP Address $BASEIP NOT released"
		;;
  esac
  return $rc
}


#
#	Find an unused interface/alias name for us to use for new IP alias
#	The argument is an IP address, and the output
#	is an aliased interface name (e.g., "eth0:0", "dc0", "le0:0").
#
find_free_interface() {
  if
    [ ! -d $VLDIR ]
  then
    mkdir -p $VLDIR
  fi

  BASEIP=`echo $1 | sed s'%/.*%%'`
  if
    NICINFO=`$FINDIF $1`
  then
    : OK
  else
    lrc=$?
    ha_log "ERROR: unable to find an interface for $BASEIP"
    return $lrc
  fi

  nicname=`echo "$NICINFO" | cut -f1`
  nicinfo=`echo "$NICINFO" | cut -f2-`
  if
    [ "X$nicname" = "X" ]
  then
    ha_log "ERROR: no interface found for $BASEIP"
    return 1;
  fi

  NICBASE="$VLDIR/$nicname"
  touch "$NICBASE"

  case $SYSTYPE in
	SunOS)
		IFLIST=`$IFCONFIG $IFCONFIG_A_OPT | \
			grep "^$nicname:[0-9]" | sed 's%: .*%%'`
		;;
	*)
		IFLIST=`$IFCONFIG $IFCONFIG_A_OPT | \
			grep "^$nicname:[0-9]" | sed 's% .*%%'`
		;;
  esac

  IFLIST=" `echo $IFLIST` "

  case $SYSTYPE in
       SunOS)
		j=1
		;;
	*)
		j=0
                TRYADRCNT=`ls "${NICBASE}:"* | wc -l | tr -d ' ' 2>/dev/null`
		if 
		  [ -f "${NICBASE}:${TRYADRCNT}" ]
		then
		  : OK
		else
		  j="${TRYADRCNT}"
		fi
		;;
  esac

  case $SYSTYPE in
	*BSD)
		echo $nicname;
		return 0;;

	*)
  	while
    	  [ $j -lt 512 ]
  	do
    	    case $IFLIST in
	      *" "$nicname:$j" "*)	;;
	      *)			
		NICLINK="$NICBASE:$j"
		if
		  ln "$NICBASE" "$NICLINK" 2>/dev/null
		then
		  echo "$nicname:$j	$nicinfo"
		  return 0
		fi;;
	    esac
            j=`expr $j + 1`
	done;;
  esac
  return 1
}


#
#	Add an IP alias for the requested IP address...
#
#	It could be that we already have taken it, in which case it should
#	do nothing.
#

ip_start() {
  #
  #	Do we already service this IP address?
  #
  case `ip_status $1` in
    *unning*)   exit 0;
  esac

  BASEIP=`echo $1 | sed s'%/.*%%'`
  SENDARPPIDFILE="$SENDARPPIDDIR/send_arp-$BASEIP"

  case $SYSTYPE in
    Linux|SunOS)
		CURRENTIF=`find_interface "$BASEIP"`
       		case $CURRENTIF in
         	  lo*)
            		remove_conflicting_loopback "$BASEIP" "$CURRENTIF"
            		;;
            	  *)	;;
    		esac ;;
    *)		;;
  esac

  if IFINFO=`find_free_interface $1`; then
  	: OK got interface [$IFINFO] for $1
  else
  	exit 1
  fi
  IF=`echo "$IFINFO" | cut -f1`

  if
    [ -x $HA_RCDIR/local_takeip ]
  then
    $HA_RCDIR/local_takeip $*
  fi

  add_interface "$BASEIP" "$IFINFO" "$IF"
  rc=$?
  case $rc in
    0)
    		;;
    *)
		return $rc
		;;
  esac

  TARGET_INTERFACE=`echo $IF | sed 's%:.*%%'`

  ha_log "info: Sending Gratuitous Arp for $BASEIP on $IF [$TARGET_INTERFACE]"

  [ -r ${CONF_D}/arp_config ] && . ${CONF_D}/arp_config
  [ -r "${CONF_D}/arp_config:${TARGET_INTERFACE}" ] && . "${CONF_D}/arp_config:${TARGET_INTERFACE}"

  # Set default values (can be overridden as described above)

  : ${ARP_INTERVAL_MS=500}	# milliseconds between ARPs
  : ${ARP_REPEAT=10}		# repeat count
  : ${ARP_BACKGROUND=yes}	# no to run in foreground (no longer any reason to do this)
  : ${ARP_NETMASK=ffffffffffff}	# netmask for ARP
  

  ARGS="-i $ARP_INTERVAL_MS -r $ARP_REPEAT -p $SENDARPPIDFILE $TARGET_INTERFACE $BASEIP auto $BASEIP $ARP_NETMASK"
  ha_log "$SENDARP $ARGS"
  case $ARP_BACKGROUND in
    yes) ($SENDARP $ARGS || ha_log "ERROR: Could not send gratuitous arps")&;;
    *)	  $SENDARP $ARGS || ha_log "ERROR: Could not send gratuitous arps";;
  esac
}

ip_status() {
  BASEIP=`echo $1 | sed -e s'%/.*%%'`
  IF=`find_interface $BASEIP`

  case $SYSTYPE in
    *BSD)
	if
		$IFCONFIG $IFCONFIG_A_OPT | grep "inet.*[: ]$BASEIP " >/dev/null 2>&1
	then
		echo "running"
	else
		echo "stopped"; return 3
	fi;;

    Linux|SunOS)		
	if
		[ -z "$IF" ]
	then
		echo "stopped"; return 3
	else
		case $IF in
		  lo*)
			echo "loopback"
			;;
		  *)
			echo "running"
			;;
		esac
	fi;;
    *)		
	if
		[ -z "$IF" ]
	then
		echo "stopped"; return 3
	else
		echo "running"
	fi;;
  esac
}

#
#	Determine if this IP address is really being served, or not.
#	Note that we don't distinguish if *we're* serving it locally...
#
ip_monitor() {
  BASEIP=`echo $1 | sed s'%/.*%%'`
  TIMEOUT=1 # seconds
  case $SYSTYPE in
        Linux)
            # -c count -t timetolive -q(uiet) -n(umeric) -W timeout
            PINGARGS="-c 1 -q -n -W $TIMEOUT $BASEIP"
            ;;
        SunOS)
            PINGARGS="$BASEIP $TIMEOUT"
            ;;
        *)
            PINGARGS="-c 1 @PING_TIMEOUT_OPT@ -q $BASEIP"
            ;;
  esac
  for j in 1 2 3
  do
    if
      @PING@ $PINGARGS >/dev/null 2>&1
    then
      echo "OK"
      return 0
    fi
  done
  echo "down"
  return 1
}

meta_data() {
  echo "
<?xml version=\"1.0\"?>
<!DOCTYPE resource-agent SYSTEM \"ra-api-1.dtd\">
<resource-agent name=\"IPaddr\" version=\"0.1\">
  <version>1.0</version>
  <parameters>
    <parameter name=\"ipaddr\" unique=\"0\">
      <longdesc lang=\"en\">
        This script manages IP alias IP addresses,It can add an IP alias, or 
        remove one. 
      </longdesc>
      <shortdesc lang=\"en\">manages IP alias</shortdesc>
      <content type=\"string\" default=\"\" />
    </parameter>
  </parameters>
  <actions>
    <action name=\"start\"   timeout=\"15\" />
    <action name=\"stop\"    timeout=\"15\" />
    <action name=\"status\"  timeout=\"15\" interval=\"15\" start-delay=\"15\" />
    <action name=\"monitor\" timeout=\"15\" interval=\"15\" start-delay=\"15\" />
    <action name=\"meta-data\"  timeout=\"5\" />
  </actions>
  <special tag=\"heartbeat\">
    <version>2.0</version>
  </special>
</resource-agent>
"
}

usage() {
  echo $USAGE >&2
}

#
#	Add or remove IP alias for the given IP address...
#

if
  [ $# -eq 1 ]
then
  case $1 in
    info)	cat <<-!INFO
	Abstract=IP address takeover
	Argument=IP address OR IP address/broadcast address OR IP address/broadcast address/netmaskbits
	Description:
	An IPaddr resource is an IP address which is to be taken over by \\
	the owning node.  An argument is required, and is of this form:
	    nnn.nnn.nnn.nnn/bbb.bbb.bbb.bbb
	Where nnn.nnn.nnn.nnn is the IP address to be taken over, and\\
	bbb.bbb.bbb.bbb is the broadcast address to be used with this address.

	Since IPaddr is the "default" resource type, it is not necessary\\
	to prefix the IP address by "IPaddr::".
	This allows IPaddr::192.2.4.63 to be abbreviated as 192.2.4.63.
	!INFO
	exit 0;;
  esac
fi

if
  [ $# -eq 0 ]
then
  usage
  exit 1
fi

if 
  ( [ X$OCF_RA_VERSION_MAJOR != "X" ] && [ $OCF_RA_VERSION_MAJOR -ne 1 ] )  ||
  ( [ X$OCF_RA_VERSION_MINOR != "X" ] && [ $OCF_RA_VERSION_MINOR -ne 0 ] )
then
  echo incompatible API version
  exit
fi

case $1 in
  start)	ip_start $OCF_RESKEY_ipaddr;;
  stop)		ip_stop $OCF_RESKEY_ipaddr;;
  status)	ip_status $OCF_RESKEY_ipaddr;;
  monitor)	ip_monitor $OCF_RESKEY_ipaddr;;
  meta-data)	meta_data;;
  *)		usage
 		exit 1
		;;
esac