dcs/bin/scripts/dcsbind.sh - trafodion - Git at Google

 #!/bin/bash
 #/**
 #* @@@ START COPYRIGHT @@@
 #
 #Licensed to the Apache Software Foundation (ASF) under one
 #or more contributor license agreements.  See the NOTICE file
 #distributed with this work for additional information
 #regarding copyright ownership.  The ASF licenses this file
 #to you under the Apache License, Version 2.0 (the
 #"License"); you may not use this file except in compliance
 #with the License.  You may obtain a copy of the License at
 #
 #  http://www.apache.org/licenses/LICENSE-2.0
 #
 #Unless required by applicable law or agreed to in writing,
 #software distributed under the License is distributed on an
 #"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 #KIND, either express or implied.  See the License for the
 #specific language governing permissions and limitations
 #under the License.
 #
 #* @@@ END COPYRIGHT @@@
 # */
 #

 function Usage {
     dcsEcho
     dcsEcho "Usage: $0 -i <nn>  -a <xxx.xxx.xxx.xxx> -p <nn> { -h }"
     dcsEcho
     dcsEcho "-i <nn>  External interface e.g., eth1"
     dcsEcho "-a <nn>  External IP address"
     dcsEcho "-p <nn>  Port number"
     dcsEcho "-h       Help"
     dcsEcho
     exit $gv_error;
 }

 function HelpUsage {
     echo "Usage: dcsbind -i <nn> -a <xxx.xxx.xxx.xxx> -p <nn> { -h }"
     echo
     echo "-i <nn>  External interface e.g., eth1"
     echo "-a <nn>  External IP address"
     echo "-p <nn>  Port number"
     echo "-h       Help"
     echo
     exit $gv_warn;
 }

 function GetOpts {

     while getopts ":i:a:p:b:h" arg
     do
        case $arg in

        i) gv_float_external_interface=${OPTARG}
           ;;

        a) gv_float_external_ip=${OPTARG}
           ;;

        p) gv_port=${OPTARG}
           ;;

        *) HelpUsage
           ;;

        esac
     done

 }

 function dcsEcho {
    echo "$1" "$2"
 }

 #
 # Gets floating ip addresses that have been configured for the dcs process
 #
 function GetFloatingIpAdrress {

 if [ -z $gv_float_external_ip ]; then
    gv_externalip_set=0
    dcsEcho "no floating external ip address has been set"
 else
    dcsEcho "floating external interface  is: " "$gv_float_external_interface"
 fi

 if  [ -z $gv_float_external_ip ] ; then
     dcsEcho "No floating external ip address is set"
    exit $gv_ok
 fi


 }

 function check_node {
 	 dcsEcho "checking node $1"
     for myinterface in `$L_PDSH -w $1 /sbin/ip link show|cut -d: -f2- | cut -c2- | awk -F': ' '/^[0-9]+:.*/ {print $2;}'`; do
 		  ip_output=$($L_PDSH -w $1 /sbin/ip addr show $myinterface | cut -d: -f2-)
 		  if [ $gv_externalip_set -eq 1 -a $external_only -eq 1 ]; then
 				myifport=`echo "$ip_output" | grep $gv_float_external_ip/`
 				status=$?
 				if [ $status -eq 0 ]; then
 					 tempinterface=`echo $gv_float_external_interface:$gv_port`

 	            # check if another interface is bound to this virtual ip address
 					 echo "$myifport" | grep "$tempinterface"  > /dev/null
 					 if [ $? -eq 1 -o "$1" != "$gv_myhostname" ]; then
 						  unbindip=`echo "$myifport"|awk '{print $2}'`
 						  unbindlb=`echo "$myifport"|awk '{print $NF}'`
 						  dcsEcho "external ip $gv_float_external_ip is already in use on node $1 bound to interface $myinterface($unbindlb) - unbind..."
 						  dcsEcho "$L_PDSH -w $1 sudo /sbin/ip addr del $unbindip dev $myinterface"
 						  $L_PDSH -w $1 sudo /sbin/ip addr del $unbindip dev $myinterface

 						  status=$?
 						  if [ $status -ne 0 ]; then
 								dcsEcho "failed - status is $status"
 								exit $gv_error
 						  fi
 					 else
 						  dcsEcho "external ip $gv_float_external_ip is already bound to $myinterface on node $1 - skip unbind"
 					 fi # endif node+name match
 				fi # endif looking for external ip
 		  fi #endif checking external ip is set or not
     done
 }

 function Check_VirtualIP_InUse_Unbind {
      dcsEcho "check all nodes to see if external virtual ip address is in use and unbind if necessary"
 	 mynode=""
 	 allMyNodes="$MY_NODES"

 	#check if external ip is in use
     dcsEcho "check all nodes $allMyNodes"
     externalNodes=`$L_PDSH $allMyNodes /sbin/ip addr show | grep -w $gv_float_external_ip | awk -F' ' '/^.+:[[:space:]]+.*/ {print $1;}' | cut -d':' -f1 | sed '/^$/d'`
     if [ ! -z "$externalNodes" ]; then
 		  dcsEcho "find possible node `echo $externalNodes`"
 		  external_only=1
 		  internal_only=0
 		  for mynode in $externalNodes; do
 				check_node $mynode
 		  done
     fi

     dcsEcho "checks completed"
 }

 function BindFloatIp {

 # bind the floating external ip
 if [ $gv_externalip_set -eq 1 ]; then
    dcsEcho "Binding external ip $gv_float_external_ip on node $gv_myhostname"
    bcast=`/sbin/ip addr show $gv_float_external_interface | grep "inet .*$gv_float_external_interface\$" | awk '{print $4}'`
    mask=`/sbin/ip addr show $gv_float_external_interface | grep "inet .*$gv_float_external_interface\$" | awk '{print $2}' | cut -d'/' -f2`

    /sbin/ip addr show| grep 'inet [^[:space:]]\+ '| awk '{print $2}'| sed -e 's/\/.*//'|grep -w $gv_float_external_ip > /dev/null
    status=$?
    if [ $status -eq 0 ]; then
       dcsEcho "external ip is already bound on node $gv_myhostname - skip bind step"
    else
       dcsEcho "sudo /sbin/ip addr add $gv_float_external_ip/$mask broadcast $bcast dev $gv_float_external_interface label $gv_float_external_interface:$gv_port"
       sudo /sbin/ip addr add $gv_float_external_ip/$mask broadcast $bcast dev $gv_float_external_interface label $gv_float_external_interface:$gv_port
       status=$?
       if [ $status -ne 0 ]; then
        dcsEcho "failed - status is $status"
        exit $gv_error
       fi
       dcsEcho "sudo /sbin/arping -U -w 30 -I $gv_float_external_interface $gv_float_external_ip"
       sudo /sbin/arping -U -w 3 -c 3 -I $gv_float_external_interface $gv_float_external_ip
       if [ $status -ne 0 ]; then
        dcsEcho "failed - status is $status"
        exit $gv_error
       fi
    fi
 fi
 }

 #
 # Checks if we have permissions to execute the ip and arping commands
 # (it needs to be set in the /etc/sudoers file)
 #
 CheckSudo()
 {

 rm dcsbind.tmp > /dev/null 2>&1
 touch dcsbind.tmp
 sudo -l -S 1> dcsbind.tmp 2>&1  < dcsbind.tmp

 dcsEcho "Checking /sbin/ip privileges"
 grep "/sbin/ip" dcsbind.tmp  > /dev/null
 status=$?
 if [ $status -ne 0 ]; then
    dcsEcho "ip command is not on the sudo list"
    rm dcsbind.tmp
    exit $gv_error;
 fi

 dcsEcho "Checking arping privileges"
 grep arping dcsbind.tmp  > /dev/null
 status=$?
 if [ $status -ne 0 ]; then
    dcsEcho "arping command is not on the sudo list"
    rm dcsbind.tmp
    exit $gv_error
 fi
 rm dcsbind.tmp

 dcsEcho "DONE...sudo check"

 }

 #
 # validate the environment and parameters
 #
 ValidateParams()
 {

 # check if we're on a cluster
 if [ -z $CLUSTERNAME ]; then
    dcsEcho "script should only be run on clusters"
    exit $gv_warn
 fi

 if [ $gv_port -eq 0 ]; then
     dcsEcho
     dcsEcho "Please specify port number."
     Usage
     exit $gv_error
 fi

 }

 function configure_route_tables {
     gv_default_interface=$(/sbin/route | grep default | awk '{print $(NF)}')
     bcast=`/sbin/ip addr show $gv_default_interface | grep "inet .*$gv_default_interface\$" | awk '{print $4}'`
     status=$?
     if [ $status -ne 0 ]; then
        dcsEcho "Failed to get the broadcast address for $gv_default_interface - status is $status"
        exit $gv_error
     fi
     dcsEcho "broadcast address to use $bcast"

     mask=`/sbin/ip addr show $gv_default_interface | grep "inet .*$gv_default_interface\$" | awk '{print $2}' | cut -d'/' -f2`
     status=$?
     if [ $status -ne 0 ]; then
        dcsEcho "Failed to get the mask for $gv_default_interface - status is $status"
        exit $gv_error
     fi
     dcsEcho "mask to use $mask"

     dcsEcho "Associating the internal ip address to the interface"
     sudo /sbin/ip addr add $gv_float_internal_ip/$mask broadcast $bcast dev $gv_float_external_interface
     status=$?
     if [[ $status -ne 0 && $status -ne 2 ]]; then
        dcsEcho "Failed to associate the floating ip to the interface - status is $status"
        exit $gv_error
     fi

     dcsEcho "Bringing the interface up"
     sudo /sbin/ip link set $gv_float_external_interface up
     status=$?
     if [[ $status -ne 0 && $status -ne 2 ]]; then
        dcsEcho "Failed to bring interface up - status is $status"
        exit $gv_error
     fi

     dcsEcho "Adding gateway address to the interface"
     GATEWAY_IP=`netstat -rn |grep "^0.0.0.0"|awk '{print $2}'`
     sudo /sbin/ip route add default via $GATEWAY_IP dev $gv_float_external_interface tab 2
     status=$?
     if [[ $status -ne 0 && $status -ne 2 ]]; then
        dcsEcho "Failed to add the gateway address to the interface - status is $status"
        exit $gv_error
     fi


     dcsEcho "Deleting and Adding FROM rule for the internal ip to the rules table"
     sudo /sbin/ip rule del from $gv_float_internal_ip/32 tab 2
     status=$?
     if [[ $status -ne 0 && $status -ne 2 ]]; then
        dcsEcho "Failed to delete FROM rule in the rules table - status is $status"
        exit $gv_error
     fi

     sudo /sbin/ip rule add from $gv_float_internal_ip/32 tab 2
     status=$?
     if [[ $status -ne 0 && $status -ne 2 ]]; then
 dcsEcho "Failed to add the FROM rule to the rules table - status is $status"
        exit $gv_error
     fi

     dcsEcho "Deleting and Adding TO rule for the internal ip to the rules table"
     sudo /sbin/ip rule del to $gv_float_internal_ip/32 tab 2
     status=$?
     if [[ $status -ne 0 && $status -ne 2 ]]; then
        dcsEcho "Failed to delete the TO rule in the rules table - status is $status"
        exit $gv_error
     fi

     sudo /sbin/ip rule add to $gv_float_internal_ip/32 tab 2
     status=$?
     if [[ $status -ne 0 && $status -ne 2 ]]; then
        dcsEcho "Failed to add the to rule to the rules table - status is $status"
        exit $gv_error
     fi

     dcsEcho "Flushing the route cache"
     sudo /sbin/ip route flush cache
     status=$?
     if [ $status -ne 0 ]; then
        dcsEcho "Failed to flush the cache - status is $status"
        exit $gv_error
     fi

     dcsEcho "Probing the network"
     sudo /sbin/arping -U -w 3 -c 3 -I $gv_float_external_interface $gv_float_external_ip
     status=$?
     if [ $status -ne 0 ]; then
        dcsEcho "Failed to send packets across the network - status is $status"
        exit $gv_error
     fi
 }

 #########################################################
 # MAIN portion of dcsbind begins here
 #########################################################

 gv_float_external_interface=""
 gv_float_external_ip=""
 gv_float_internal_ip=""
 gv_port=0

 gv_ok=0
 gv_warn=1
 gv_error=-1

 if [[ $ENABLE_HA != "true" ]]; then
   exit $gv_ok
 fi

 gv_externalip_set=1
 gv_internalip_set=1

 gv_myhostname=`hostname | cut -d'.' -f1`

 GetOpts $1 $2 $3 $4 $5 $6 $7 $8 $9

 dcsEcho "dcsbind invoked with parameters -i $gv_float_external_interface -a $gv_float_external_ip -p $gv_port"

 ValidateParams
 CheckSudo
 GetFloatingIpAdrress

 gv_float_internal_ip=`echo $gv_float_external_ip`

 dcsEcho "gv_float_external_ip :" $gv_float_external_ip
 dcsEcho "gv_float_internal_ip :" $gv_float_internal_ip

 if ! grep -q ^ec2 /sys/hypervisor/uuid 2>/dev/null ; then
     # Non-AWS system
     L_PDSH="pdsh -S"
     Check_VirtualIP_InUse_Unbind
     BindFloatIp
 else
     # AWS system
     awscmd="/usr/bin/aws ec2 --output text "
     device_index_to_use=`echo $gv_float_external_interface | sed 's/[^0-9]//g'`
     dcsEcho "Using device index $device_index_to_use for $gv_float_external_interface"

     # Test if .aws file exists on this node
     awstmp=`mktemp -t`
     if [[ $? != 0 ]]; then
        dcsEcho "Error while getting a temporary file for $awstmp. Exiting."
        exit $gv_error
     fi

     $awscmd describe-instances --query 'Reservations[*].Instances[*].[InstanceId,PrivateDnsName]' >$awstmp 2>/dev/null
     if [[ $? != 0 ]]; then
        dcsEcho "Missing .aws config files on node $gv_myhostname"
        rm -f $awstmp
        exit $gv_error
     fi

     rm -f $awstmp
     # Get instance Id of the instance
     INSTANCEID=`$awscmd describe-instances --query 'Reservations[*].Instances[*].[InstanceId,PrivateDnsName]' |grep -i -w $gv_myhostname |cut -f1`
     dcsEcho "Using Instance id $INSTANCEID"

     # Get the network interface configured for the vpc
     NETWORKINTERFACE=`$awscmd describe-network-interfaces --query 'NetworkInterfaces[*].[NetworkInterfaceId,PrivateIpAddress]' |grep -i -w $gv_float_internal_ip |cut -f1`
     dcsEcho "Using network interface $NETWORKINTERFACE"

     # Get the attachment id for the network interface
     ATTACH_ID=`$awscmd describe-network-interfaces --network-interface-ids $NETWORKINTERFACE --filters Name=attachment.device-index,Values=$device_index_to_use --query 'NetworkInterfaces[*].[Attachment.AttachmentId]'`
     if [ ! -z "$ATTACH_ID" ]; then
         dcsEcho "Detaching attachment Id:" $ATTACH_ID
         $awscmd detach-network-interface --attachment-id $ATTACH_ID
         network_interface_status=`$awscmd describe-network-interfaces --filters Name=attachment.attachment-id,Values=$ATTACH_ID --query NetworkInterfaces[*].[Status]`
         while [[ "$network_interface_status" = "in-use" ]]
         do
            dcsEcho "Attachment Status ... " $network_interface_status
            sleep 10
            network_interface_status=`$awscmd describe-network-interfaces --filters Name=attachment.attachment-id,Values=$ATTACH_ID --query NetworkInterfaces[*].[Status]`
         done
     fi

     dcsEcho "Going to attach network interface $NETWORKINTERFACE to the another instance"
     NEWATTACH_ID=`$awscmd attach-network-interface --network-interface-id $NETWORKINTERFACE --instance-id $INSTANCEID --device-index $device_index_to_use`
     dcsEcho "New attachment Id " $NEWATTACH_ID
     newattachment_status=`$awscmd describe-network-interfaces --filters Name=attachment.attachment-id,Values=$NEWATTACH_ID --query NetworkInterfaces[*].[Attachment.Status]`
     while [[ "$newattachment_status" != "attached" ]]
     do
      dcsEcho "New Attachment Status ... " $newattachment_status
      sleep 10
      newattachment_status=`$awscmd describe-network-interfaces --filters Name=attachment.attachment-id,Values=$NEWATTACH_ID --query NetworkInterfaces[*].[Attachment.Status]`
     done

     configure_route_tables
 fi

 exit $gv_ok
	#!/bin/bash
	#/**
	#* @@@ START COPYRIGHT @@@
	#
	#Licensed to the Apache Software Foundation (ASF) under one
	#or more contributor license agreements. See the NOTICE file
	#distributed with this work for additional information
	#regarding copyright ownership. The ASF licenses this file
	#to you under the Apache License, Version 2.0 (the
	#"License"); you may not use this file except in compliance
	#with the License. You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	#Unless required by applicable law or agreed to in writing,
	#software distributed under the License is distributed on an
	#"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	#KIND, either express or implied. See the License for the
	#specific language governing permissions and limitations
	#under the License.
	#
	#* @@@ END COPYRIGHT @@@
	# */
	#

	function Usage {
	dcsEcho
	dcsEcho "Usage: $0 -i <nn> -a <xxx.xxx.xxx.xxx> -p <nn> { -h }"
	dcsEcho
	dcsEcho "-i <nn> External interface e.g., eth1"
	dcsEcho "-a <nn> External IP address"
	dcsEcho "-p <nn> Port number"
	dcsEcho "-h Help"
	dcsEcho
	exit $gv_error;
	}

	function HelpUsage {
	echo "Usage: dcsbind -i <nn> -a <xxx.xxx.xxx.xxx> -p <nn> { -h }"
	echo
	echo "-i <nn> External interface e.g., eth1"
	echo "-a <nn> External IP address"
	echo "-p <nn> Port number"
	echo "-h Help"
	echo
	exit $gv_warn;
	}

	function GetOpts {

	while getopts ":i:a:p:b:h" arg
	do
	case $arg in

	i) gv_float_external_interface=${OPTARG}
	;;

	a) gv_float_external_ip=${OPTARG}
	;;

	p) gv_port=${OPTARG}
	;;

	*) HelpUsage
	;;

	esac
	done

	}

	function dcsEcho {
	echo "$1" "$2"
	}

	#
	# Gets floating ip addresses that have been configured for the dcs process
	#
	function GetFloatingIpAdrress {

	if [ -z $gv_float_external_ip ]; then
	gv_externalip_set=0
	dcsEcho "no floating external ip address has been set"
	else
	dcsEcho "floating external interface is: " "$gv_float_external_interface"
	fi

	if [ -z $gv_float_external_ip ] ; then
	dcsEcho "No floating external ip address is set"
	exit $gv_ok
	fi


	}

	function check_node {
	dcsEcho "checking node $1"
	for myinterface in `$L_PDSH -w $1 /sbin/ip link show\|cut -d: -f2- \| cut -c2- \| awk -F': ' '/^[0-9]+:.*/ {print $2;}'`; do
	ip_output=$($L_PDSH -w $1 /sbin/ip addr show $myinterface \| cut -d: -f2-)
	if [ $gv_externalip_set -eq 1 -a $external_only -eq 1 ]; then
	myifport=`echo "$ip_output" \| grep $gv_float_external_ip/`
	status=$?
	if [ $status -eq 0 ]; then
	tempinterface=`echo $gv_float_external_interface:$gv_port`

	# check if another interface is bound to this virtual ip address
	echo "$myifport" \| grep "$tempinterface" > /dev/null
	if [ $? -eq 1 -o "$1" != "$gv_myhostname" ]; then
	unbindip=`echo "$myifport"\|awk '{print $2}'`
	unbindlb=`echo "$myifport"\|awk '{print $NF}'`
	dcsEcho "external ip $gv_float_external_ip is already in use on node $1 bound to interface $myinterface($unbindlb) - unbind..."
	dcsEcho "$L_PDSH -w $1 sudo /sbin/ip addr del $unbindip dev $myinterface"
	$L_PDSH -w $1 sudo /sbin/ip addr del $unbindip dev $myinterface

	status=$?
	if [ $status -ne 0 ]; then
	dcsEcho "failed - status is $status"
	exit $gv_error
	fi
	else
	dcsEcho "external ip $gv_float_external_ip is already bound to $myinterface on node $1 - skip unbind"
	fi # endif node+name match
	fi # endif looking for external ip
	fi #endif checking external ip is set or not
	done
	}

	function Check_VirtualIP_InUse_Unbind {
	dcsEcho "check all nodes to see if external virtual ip address is in use and unbind if necessary"
	mynode=""
	allMyNodes="$MY_NODES"

	#check if external ip is in use
	dcsEcho "check all nodes $allMyNodes"
	externalNodes=`$L_PDSH $allMyNodes /sbin/ip addr show \| grep -w $gv_float_external_ip \| awk -F' ' '/^.+:[[:space:]]+.*/ {print $1;}' \| cut -d':' -f1 \| sed '/^$/d'`
	if [ ! -z "$externalNodes" ]; then
	dcsEcho "find possible node `echo $externalNodes`"
	external_only=1
	internal_only=0
	for mynode in $externalNodes; do
	check_node $mynode
	done
	fi

	dcsEcho "checks completed"
	}

	function BindFloatIp {

	# bind the floating external ip
	if [ $gv_externalip_set -eq 1 ]; then
	dcsEcho "Binding external ip $gv_float_external_ip on node $gv_myhostname"
	bcast=`/sbin/ip addr show $gv_float_external_interface \| grep "inet .*$gv_float_external_interface\$" \| awk '{print $4}'`
	mask=`/sbin/ip addr show $gv_float_external_interface \| grep "inet .*$gv_float_external_interface\$" \| awk '{print $2}' \| cut -d'/' -f2`

	/sbin/ip addr show\| grep 'inet [^[:space:]]\+ '\| awk '{print $2}'\| sed -e 's/\/.*//'\|grep -w $gv_float_external_ip > /dev/null
	status=$?
	if [ $status -eq 0 ]; then
	dcsEcho "external ip is already bound on node $gv_myhostname - skip bind step"
	else
	dcsEcho "sudo /sbin/ip addr add $gv_float_external_ip/$mask broadcast $bcast dev $gv_float_external_interface label $gv_float_external_interface:$gv_port"
	sudo /sbin/ip addr add $gv_float_external_ip/$mask broadcast $bcast dev $gv_float_external_interface label $gv_float_external_interface:$gv_port
	status=$?
	if [ $status -ne 0 ]; then
	dcsEcho "failed - status is $status"
	exit $gv_error
	fi
	dcsEcho "sudo /sbin/arping -U -w 30 -I $gv_float_external_interface $gv_float_external_ip"
	sudo /sbin/arping -U -w 3 -c 3 -I $gv_float_external_interface $gv_float_external_ip
	if [ $status -ne 0 ]; then
	dcsEcho "failed - status is $status"
	exit $gv_error
	fi
	fi
	fi
	}

	#
	# Checks if we have permissions to execute the ip and arping commands
	# (it needs to be set in the /etc/sudoers file)
	#
	CheckSudo()
	{

	rm dcsbind.tmp > /dev/null 2>&1
	touch dcsbind.tmp
	sudo -l -S 1> dcsbind.tmp 2>&1 < dcsbind.tmp

	dcsEcho "Checking /sbin/ip privileges"
	grep "/sbin/ip" dcsbind.tmp > /dev/null
	status=$?
	if [ $status -ne 0 ]; then
	dcsEcho "ip command is not on the sudo list"
	rm dcsbind.tmp
	exit $gv_error;
	fi

	dcsEcho "Checking arping privileges"
	grep arping dcsbind.tmp > /dev/null
	status=$?
	if [ $status -ne 0 ]; then
	dcsEcho "arping command is not on the sudo list"
	rm dcsbind.tmp
	exit $gv_error
	fi
	rm dcsbind.tmp

	dcsEcho "DONE...sudo check"

	}

	#
	# validate the environment and parameters
	#
	ValidateParams()
	{

	# check if we're on a cluster
	if [ -z $CLUSTERNAME ]; then
	dcsEcho "script should only be run on clusters"
	exit $gv_warn
	fi

	if [ $gv_port -eq 0 ]; then
	dcsEcho
	dcsEcho "Please specify port number."
	Usage
	exit $gv_error
	fi

	}

	function configure_route_tables {
	gv_default_interface=$(/sbin/route \| grep default \| awk '{print $(NF)}')
	bcast=`/sbin/ip addr show $gv_default_interface \| grep "inet .*$gv_default_interface\$" \| awk '{print $4}'`
	status=$?
	if [ $status -ne 0 ]; then
	dcsEcho "Failed to get the broadcast address for $gv_default_interface - status is $status"
	exit $gv_error
	fi
	dcsEcho "broadcast address to use $bcast"

	mask=`/sbin/ip addr show $gv_default_interface \| grep "inet .*$gv_default_interface\$" \| awk '{print $2}' \| cut -d'/' -f2`
	status=$?
	if [ $status -ne 0 ]; then
	dcsEcho "Failed to get the mask for $gv_default_interface - status is $status"
	exit $gv_error
	fi
	dcsEcho "mask to use $mask"

	dcsEcho "Associating the internal ip address to the interface"
	sudo /sbin/ip addr add $gv_float_internal_ip/$mask broadcast $bcast dev $gv_float_external_interface
	status=$?
	if [[ $status -ne 0 && $status -ne 2 ]]; then
	dcsEcho "Failed to associate the floating ip to the interface - status is $status"
	exit $gv_error
	fi

	dcsEcho "Bringing the interface up"
	sudo /sbin/ip link set $gv_float_external_interface up
	status=$?
	if [[ $status -ne 0 && $status -ne 2 ]]; then
	dcsEcho "Failed to bring interface up - status is $status"
	exit $gv_error
	fi

	dcsEcho "Adding gateway address to the interface"
	GATEWAY_IP=`netstat -rn \|grep "^0.0.0.0"\|awk '{print $2}'`
	sudo /sbin/ip route add default via $GATEWAY_IP dev $gv_float_external_interface tab 2
	status=$?
	if [[ $status -ne 0 && $status -ne 2 ]]; then
	dcsEcho "Failed to add the gateway address to the interface - status is $status"
	exit $gv_error
	fi


	dcsEcho "Deleting and Adding FROM rule for the internal ip to the rules table"
	sudo /sbin/ip rule del from $gv_float_internal_ip/32 tab 2
	status=$?
	if [[ $status -ne 0 && $status -ne 2 ]]; then
	dcsEcho "Failed to delete FROM rule in the rules table - status is $status"
	exit $gv_error
	fi

	sudo /sbin/ip rule add from $gv_float_internal_ip/32 tab 2
	status=$?
	if [[ $status -ne 0 && $status -ne 2 ]]; then
	dcsEcho "Failed to add the FROM rule to the rules table - status is $status"
	exit $gv_error
	fi

	dcsEcho "Deleting and Adding TO rule for the internal ip to the rules table"
	sudo /sbin/ip rule del to $gv_float_internal_ip/32 tab 2
	status=$?
	if [[ $status -ne 0 && $status -ne 2 ]]; then
	dcsEcho "Failed to delete the TO rule in the rules table - status is $status"
	exit $gv_error
	fi

	sudo /sbin/ip rule add to $gv_float_internal_ip/32 tab 2
	status=$?
	if [[ $status -ne 0 && $status -ne 2 ]]; then
	dcsEcho "Failed to add the to rule to the rules table - status is $status"
	exit $gv_error
	fi

	dcsEcho "Flushing the route cache"
	sudo /sbin/ip route flush cache
	status=$?
	if [ $status -ne 0 ]; then
	dcsEcho "Failed to flush the cache - status is $status"
	exit $gv_error
	fi

	dcsEcho "Probing the network"
	sudo /sbin/arping -U -w 3 -c 3 -I $gv_float_external_interface $gv_float_external_ip
	status=$?
	if [ $status -ne 0 ]; then
	dcsEcho "Failed to send packets across the network - status is $status"
	exit $gv_error
	fi
	}

	#########################################################
	# MAIN portion of dcsbind begins here
	#########################################################

	gv_float_external_interface=""
	gv_float_external_ip=""
	gv_float_internal_ip=""
	gv_port=0

	gv_ok=0
	gv_warn=1
	gv_error=-1

	if [[ $ENABLE_HA != "true" ]]; then
	exit $gv_ok
	fi

	gv_externalip_set=1
	gv_internalip_set=1

	gv_myhostname=`hostname \| cut -d'.' -f1`

	GetOpts $1 $2 $3 $4 $5 $6 $7 $8 $9

	dcsEcho "dcsbind invoked with parameters -i $gv_float_external_interface -a $gv_float_external_ip -p $gv_port"

	ValidateParams
	CheckSudo
	GetFloatingIpAdrress

	gv_float_internal_ip=`echo $gv_float_external_ip`

	dcsEcho "gv_float_external_ip :" $gv_float_external_ip
	dcsEcho "gv_float_internal_ip :" $gv_float_internal_ip

	if ! grep -q ^ec2 /sys/hypervisor/uuid 2>/dev/null ; then
	# Non-AWS system
	L_PDSH="pdsh -S"
	Check_VirtualIP_InUse_Unbind
	BindFloatIp
	else
	# AWS system
	awscmd="/usr/bin/aws ec2 --output text "
	device_index_to_use=`echo $gv_float_external_interface \| sed 's/[^0-9]//g'`
	dcsEcho "Using device index $device_index_to_use for $gv_float_external_interface"

	# Test if .aws file exists on this node
	awstmp=`mktemp -t`
	if [[ $? != 0 ]]; then
	dcsEcho "Error while getting a temporary file for $awstmp. Exiting."
	exit $gv_error
	fi

	$awscmd describe-instances --query 'Reservations[].Instances[].[InstanceId,PrivateDnsName]' >$awstmp 2>/dev/null
	if [[ $? != 0 ]]; then
	dcsEcho "Missing .aws config files on node $gv_myhostname"
	rm -f $awstmp
	exit $gv_error
	fi

	rm -f $awstmp
	# Get instance Id of the instance
	INSTANCEID=`$awscmd describe-instances --query 'Reservations[].Instances[].[InstanceId,PrivateDnsName]' \|grep -i -w $gv_myhostname \|cut -f1`
	dcsEcho "Using Instance id $INSTANCEID"

	# Get the network interface configured for the vpc
	NETWORKINTERFACE=`$awscmd describe-network-interfaces --query 'NetworkInterfaces[*].[NetworkInterfaceId,PrivateIpAddress]' \|grep -i -w $gv_float_internal_ip \|cut -f1`
	dcsEcho "Using network interface $NETWORKINTERFACE"

	# Get the attachment id for the network interface
	ATTACH_ID=`$awscmd describe-network-interfaces --network-interface-ids $NETWORKINTERFACE --filters Name=attachment.device-index,Values=$device_index_to_use --query 'NetworkInterfaces[*].[Attachment.AttachmentId]'`
	if [ ! -z "$ATTACH_ID" ]; then
	dcsEcho "Detaching attachment Id:" $ATTACH_ID
	$awscmd detach-network-interface --attachment-id $ATTACH_ID
	network_interface_status=`$awscmd describe-network-interfaces --filters Name=attachment.attachment-id,Values=$ATTACH_ID --query NetworkInterfaces[*].[Status]`
	while [[ "$network_interface_status" = "in-use" ]]
	do
	dcsEcho "Attachment Status ... " $network_interface_status
	sleep 10
	network_interface_status=`$awscmd describe-network-interfaces --filters Name=attachment.attachment-id,Values=$ATTACH_ID --query NetworkInterfaces[*].[Status]`
	done
	fi

	dcsEcho "Going to attach network interface $NETWORKINTERFACE to the another instance"
	NEWATTACH_ID=`$awscmd attach-network-interface --network-interface-id $NETWORKINTERFACE --instance-id $INSTANCEID --device-index $device_index_to_use`
	dcsEcho "New attachment Id " $NEWATTACH_ID
	newattachment_status=`$awscmd describe-network-interfaces --filters Name=attachment.attachment-id,Values=$NEWATTACH_ID --query NetworkInterfaces[*].[Attachment.Status]`
	while [[ "$newattachment_status" != "attached" ]]
	do
	dcsEcho "New Attachment Status ... " $newattachment_status
	sleep 10
	newattachment_status=`$awscmd describe-network-interfaces --filters Name=attachment.attachment-id,Values=$NEWATTACH_ID --query NetworkInterfaces[*].[Attachment.Status]`
	done

	configure_route_tables
	fi

	exit $gv_ok