lvs-dr启动及健康状态检查脚本

一、lvs-dr的director启动脚本

#!/bin/bash
#
# LVS script for VS/DR
#
. /etc/rc.d/init.d/functions
#
VIP=172.16.171.99
RIP1=172.16.171.110
RIP2=172.16.171.120
PORT=80
#
case "$1" in
start)  
  /sbin/ifconfig eth0:1 $VIP broadcast $VIP netmask 255.255.255.255 up
  /sbin/route add -host $VIP dev eth0:1
# Since this is the Director we must be able to forward packets
  echo 1 > /proc/sys/net/ipv4/ip_forward
# Clear all iptables rules.
  /sbin/iptables -F
# Reset iptables counters.
  /sbin/iptables -Z
# Clear all ipvsadm rules/services.
  /sbin/ipvsadm -C
# Add an IP virtual service for VIP 192.168.0.219 port 80
# In this recipe, we will use the round-robin scheduling method.
# In production, however, you should use a weighted, dynamic scheduling method.
  /sbin/ipvsadm -A -t $VIP:80 -s wlc
# Now direct packets for this VIP to
# the real server IP (RIP) inside the cluster
  /sbin/ipvsadm -a -t $VIP:80 -r $RIP1 -g -w 1
  /sbin/ipvsadm -a -t $VIP:80 -r $RIP2 -g -w 2
  /bin/touch /var/lock/subsys/ipvsadm &> /dev/null
;;
stop)
# Stop forwarding packets
  echo 0 > /proc/sys/net/ipv4/ip_forward
# Reset ipvsadm
  /sbin/ipvsadm -C
# Bring down the VIP interface
  /sbin/ifconfig eth0:1 down
  /sbin/route del $VIP                              
  /bin/rm -f /var/lock/subsys/ipvsadm                                                                   
  echo "ipvs is stopped..."
;;
status)
  if [ ! -e /var/lock/subsys/ipvsadm ]; then
    echo "ipvsadm is stopped ..."
  else
    echo "ipvs is running ..."
    ipvsadm -L -n
  fi
;;
*)
  echo "Usage: $0 {start|stop|status}"
;;
esac

二、lvs real-server启动脚本

#!/bin/bash
#
# Script to start LVS DR real server.
# description: LVS DR real server
#
.  /etc/rc.d/init.d/functions
VIP=172.16.171.99
host=`/bin/hostname`
case "$1" in
start)
       # Start LVS-DR real server on this machine.
  /sbin/ifconfig lo down
  /sbin/ifconfig lo up
  echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
  echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
  echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
  echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
  /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
  /sbin/route add -host $VIP dev lo:0
;;
stop)
  # Stop LVS-DR real server loopback device(s).
  /sbin/ifconfig lo:0 down
  echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore
  echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce
  echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
  echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
;;
status)
  # Status of LVS-DR real server.
  islothere=`/sbin/ifconfig lo:0 | grep $VIP`
  isrothere=`netstat -rn | grep "lo:0" | grep $VIP`
  if [ ! "$islothere" -o ! "isrothere" ];then
      # Either the route or the lo:0 device
      # not found.
      echo "LVS-DR real server Stopped."
  else
      echo "LVS-DR real server Running."
  fi
;;
*)
      # Invalid entry.
      echo "$0: Usage: $0 {start|status|stop}"
      exit 1
;;
esac

三、lvs对后端服务器健康状态检查脚本

#!/bin/bash
#
VIP=172.16.171.99
CPORT=80
FAIL_BACK=127.0.0.1
RS=("172.16.171.110" "172.16.171.120")
declare -a RSSTATUS
RW=("2" "1")
RPORT=80
TYPE=g
CHKLOOP=3
LOG=./ipvsmonitor.log
addrs() {
  ipvsadm -a -t $VIP:$CPORT -r $1:$RPORT -$TYPE -w $2
  [ $? -eq 0 ] && return 0 || return 1
}
delrs() {
  ipvsadm -d -t $VIP:$CPORT -r $1:$RPORT
  [ $? -eq 0 ] && return 0 || return 1
}
checkrs() {
  local I=1
  while [ $I -le $CHKLOOP ]; do
    if curl --connect-timeout 1 http://$1 &> /dev/null; then
      return 0
    fi
    let I++
  done
  return 1
}
initstatus() {
  local I
  local COUNT=0;
  for I in ${RS[*]}; do
    if ipvsadm -L -n | grep "$I:$RPORT" && > /dev/null ; then
      RSSTATUS[$COUNT]=1
    else
      RSSTATUS[$COUNT]=0
    fi
  let COUNT++
  done
}
initstatus
while :; do
  let COUNT=0
  for I in ${RS[*]}; do
    if checkrs $I; then
      if [ ${RSSTATUS[$COUNT]} -eq 0 ]; then
         addrs $I ${RW[$COUNT]}
         [ $? -eq 0 ] && RSSTATUS[$COUNT]=1 && echo "`date +'%F %H:%M:%S'`, $I is back." >> $LOG
      fi
    else
      if [ ${RSSTATUS[$COUNT]} -eq 1 ]; then
         delrs $I
         [ $? -eq 0 ] && RSSTATUS[$COUNT]=0 && echo "`date +'%F %H:%M:%S'`, $I is gone." >> $LOG
      fi
    fi
    let COUNT++
  done
  sleep 5
done