LVS DR+keepalived自动化配置脚本，这个是按照Redhat推荐的方式配置的。

这个比我前面写的那个要好些（前面那个是按照网上的配置写的，不太专业）

需要安装的软件：

LVS主从节点上：

keepalived

ipvsadm

RealServer上需要安装的软件：

arptables_jf

另外，执行自动化配置脚本的机子，需要expect软件支持，参见脚本中的注意事项。

 

这个脚本是在我手动配置成功后编写的，还没测试过，不过应该问题不大，有问题麻烦帮忙指正。

 

自动化脚本：

#!/bin/sh
#文 件 名: autogen_lvs.sh
#功 能: 自动生成LVS,Keepalived配置文件,生成环境自动部署,自动运行脚本等
#创建时间: 2012-02-05
#修改时间: 2012-06-01
#自动化生成的文件列表:
#(执行autogen_lvs.sh后,会生成autogen目录，里面会存放自动生成的相关文件)
#1. ConfigAllServer.sh 配置相关服务器集群功能脚本，包括负载均衡主服务器，负载均衡备服务器，真实服务器
#2. RunAllServer.sh 开启所有Server集群功能，包括负载均衡主备服务器，真实服务器
#3. StopAllServer.sh 关闭所有Server集群功能，包括负载均衡主备服务器，真实服务器
#4. LVSServer.sh 开启或关闭负载均衡器集群功能，该文件会被ConfigAllServer.sh部署到负载主备服务器的/etc/ha.d/下，供后续使用
#5. RealServer.sh 开启或关闭真实服务器集群功能，该文件会被ConfigAllServer.sh部署到真实服务器的/etc/下，供后续使用
#6. keepalvied_master.conf 文件会被ConfigAllServer.sh部署到负载主服务器的/etc/keepalived/下，并重命名为keepalived.conf，作为HA配置
#7. keepalvied_backup.conf 文件会被ConfigAllServer.sh部署到负载备服务器的/etc/keepalived/下，并重命名为keepalived.conf，作为HA配置

# -------------------------------------------------以下根据实际情况进行设定----------------------------------------------------
# ROOT权限密码,该密码为所有负载均衡服务器,真实服务器的通用密码,所有服务器ROOT将使用统一密码,便于自动化控制，否则上面提到的ConfigAllServer.sh, RunAllServer.sh, StopAllServer.sh这三个文件无法正常运行
ROOTPASSWORD=123456
# 负载均衡主服务器IP地址
LVS_SERVER_IP=172.16.0.40
# 负载均衡备服务器IP地址
LVS_BACKUP_SERVER_IP=1.1.1.1
# 虚拟IP地址,对外提供服务的地址
VIP=172.16.0.252
# 广播地址
BROADCAST=172.16.0.255
# 真实服务器数组,数据之间用空格隔开
# 如'10.0.0.1 10.0.0.2' 表示10.0.0.1和10.0.0.2
# 如'10 10.0.0.1' 表示10.0.0.1, 10.0.0.2, ..., 10.0.0.10
RS_IPS='172.16.0.43 172.16.0.44'
# 真实服务器业务对外提供服务的端口数组,数据之间用空格隔开,如'80 81'
RS_PORTS='8447 8888'
# 网卡设备号,如eth0,eth1,单网卡一般都为eth0
DEVICE=eth0
#--------------------------------------------------------------------------------------------------------------------------------

rm -fr ./autogen_lvs
mkdir ./autogen_lvs

first_string=`echo $RS_IPS | cut -d " " -f1`
if [[ `echo $first_string | grep "\." | wc -l` = "0" ]];then
    IP_NUM=$first_string
    IP_START=`echo $RS_IPS | cut -d " " -f2 | awk 'BEGIN{ FS="." } { printf "%s.%s.%s.", $1, $2, $3}' `
    OFFSET=`echo $RS_IPS | cut -d " " -f2 | cut -d "." -f4`
    RS_IPS=
    for((i=0;i<$IP_NUM;i++));do
        RS_IPS=$RS_IPS" $IP_START`expr $OFFSET + $i`"
    done
fi

#Create LVSServer.sh
cat > ./autogen_lvs/LVSServer.sh << end
#!/bin/sh

RS_PORTS="$RS_PORTS"

for port in \$RS_PORTS;do
    iptables -I INPUT 1 -p tcp --dport \$port -j ACCEPT
done

case "\$1" in
    start)
        /etc/init.d/keepalived start
        ;;
    stop)
        /etc/init.d/keepalived stop
        ;;
    restart)
        /etc/init.d/keepalived restart
        ;;
    *)
        echo "Usage: \$0 {start|stop|restart}"
        exit 1
esac

if ! grep LVSServer /etc/rc.local > /dev/null
then
        echo "sh /etc/LVSServer.sh start" >> /etc/rc.local
fi

end

#Create RealServer.sh
cat > ./autogen_lvs/RealServer.sh << end
#!/bin/sh

VIP="$VIP"
RS_PORTS="$RS_PORTS"

RIP=\`ifconfig | sed -n "/$DEVICE/{
N
s/^$DEVICE.*inet addr:\(.*\) Bcast.*$/\1/p
q
}
"\`

if [ -z "\`rpm -qa | grep arptables_jf\`" ];then
        echo "You need install the software of arptables_jf first"
        exit
fi

if [ ! -e "/etc/sysconfig/arptables" ];then
        service arptables_jf save
fi

#add vip on $DEVICE
ip addr add \$VIP dev $DEVICE

#drop arp package to vip
service arptables_jf start
arptables -A IN -d \$VIP -j DROP
arptables -A OUT -s \$VIP -j mangle --mangle-ip-s \$RIP

service iptables start
for port in \$RS_PORTS;do
    iptables -I INPUT 1 -p tcp --dport \$port -j ACCEPT
    iptables -t nat -A PREROUTING -p tcp -d \$VIP --dport \$port -j REDIRECT
done

if ! grep RealServer /etc/rc.local > /dev/null
then
        echo "sh /etc/RealServer.sh start" >> /etc/rc.local
fi
end

VIRTUAL_SERVER_LIST=
for rs_port in $RS_PORTS;do
    VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST"virtual_server $VIP $rs_port {"$'\n'
    VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"delay_loop 6"$'\n'
    VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"lb_algo wlc"$'\n'
    VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"lb_kind DR"$'\n'
    VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"#persistence_timeout 60"$'\n'
    VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"protocol TCP"$'\n'
    for rs_ip in $RS_IPS;do
        VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"real_server $rs_ip $rs_port {"$'\n'
        VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'"weight 1"$'\n'
        VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'"TCP_CHECK {"$'\n'
        VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'$'\t'"connect_timeout 10"$'\n'
        VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'$'\t'"nb_get_retry 3"$'\n'
        VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'$'\t'"delay_before_retry 3"$'\n'
        VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'$'\t'"connect_port $rs_port"$'\n'
        VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'"}"$'\n'
        VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"}"$'\n'
    done
    VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST"}"$'\n'$'\n'
done

#Create keepalived_master.conf
cat > ./autogen_lvs/keepalived_master.conf << end
! Configuration File for keepalived

global_defs {
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state MASTER
    interface $DEVICE
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        $VIP
    }
}

$VIRTUAL_SERVER_LIST
end

#Create keepalived_backup.conf
sed -e 's/state MASTER/state BACKUP/' -e 's/priority 100/priority 99/' ./autogen_lvs/keepalived_master.conf > ./autogen_lvs/keepalived_backup.conf

#Create ConfigAllServer.sh
cat > ./autogen_lvs/ConfigAllServer.sh << end
#!/bin/sh

RS_IPS="$RS_IPS"
ROOTPASSWORD="$ROOTPASSWORD"
LVS_SERVER_IP="$LVS_SERVER_IP"
LVS_BACKUP_SERVER_IP="$LVS_BACKUP_SERVER_IP"

function test_host_online() {
    if [[ \` ping \$1 -c 1 -w 1 | grep "1 received" | wc -l \` = "1" ]];then
        return 0
    else
        return 1
    fi
}

sed -i 's/^# StrictHostKeyChecking ask$/StrictHostKeyChecking no/' /etc/ssh/ssh_config

if test_host_online \$LVS_SERVER_IP;then
/usr/bin/expect << endexpect
    set timeout 100
    spawn scp LVSServer.sh root@\$LVS_SERVER_IP:/etc/
    expect "*password*"
    send "\$ROOTPASSWORD\r"
    expect eof

    spawn scp keepalived_master.conf root@\$LVS_SERVER_IP:/etc/keepalived/keepalived.conf
    expect "*password*"
    send "\$ROOTPASSWORD\r"
    expect eof
endexpect
fi

if test_host_online \$LVS_BACKUP_SERVER_IP;then
/usr/bin/expect << endexpect
    set timeout 100
    spawn scp LVSServer.sh root@\$LVS_BACKUP_SERVER_IP:/etc/
    expect "*password*"
    send "\$ROOTPASSWORD\r"
    expect eof

    spawn scp keepalived_backup.conf root@\$LVS_BACKUP_SERVER_IP:/etc/keepalived/keepalived.conf
    expect "*password*"
    send "\$ROOTPASSWORD\r"
    expect eof
endexpect
fi

for rs_ip in \$RS_IPS;do
    if test_host_online \$rs_ip;then
/usr/bin/expect << endexpect
        set timeout 100
        spawn scp RealServer.sh root@\$rs_ip:/etc/
        expect "*password*"
        send "\$ROOTPASSWORD\r"
        expect eof
endexpect
    fi
done
end

#Create RunAllServer.sh
cat > ./autogen_lvs/RunAllServer.sh << end
#!/bin/sh

LVS_SERVER_IP="$LVS_SERVER_IP"
ROOTPASSWORD="$ROOTPASSWORD"
LVS_BACKUP_SERVER_IP="$LVS_BACKUP_SERVER_IP"
RS_IPS="$RS_IPS"

function test_host_online() {
    if [[ \` ping \$1 -c 1 -w 1 | grep "1 received" | wc -l \` = "1" ]];then
        return 0
    else
        return 1
    fi
}

sed -i 's/^# StrictHostKeyChecking ask$/StrictHostKeyChecking no/' /etc/ssh/ssh_config

if test_host_online \$LVS_SERVER_IP;then
/usr/bin/expect << endexpect
    set timeout 100
    spawn ssh root@\$LVS_SERVER_IP
    expect "*password*"
    send "\$ROOTPASSWORD\r"
    expect "#"
    send "sh /etc/LVSServer.sh start\r"
    expect "#"
    send "exit\r"
endexpect
fi

if test_host_online \$LVS_BACKUP_SERVER_IP;then
/usr/bin/expect << endexpect
    set timeout 100
    spawn ssh root@\$LVS_BACKUP_SERVER_IP
    expect "*password*"
    send "\$ROOTPASSWORD\r"
    expect "#"
    send "sh /etc/LVSServer.sh start\r"
    expect "#"
    send "exit\r"
endexpect
fi

for rs_ip in \$RS_IPS;do
    if test_host_online \$rs_ip;then
/usr/bin/expect << endexpect
        set timeout 100
        spawn ssh root@\$rs_ip
        expect "*password*"
        send "\$ROOTPASSWORD\r"
        expect "#"
        send "sh /etc/RealServer.sh start\r"
        expect "#"
        send "exit\r"
endexpect
    fi
done

end

#Create StopAllServer.sh
sed 's/start/stop/' ./autogen_lvs/RunAllServer.sh > ./autogen_lvs/StopAllServer.sh