一键部署LVS高可用

一键部署LVS高可用，本人亲测可用，若有不同可做调整

#!/usr/bin/env bash

mkdir lxl

cd lxl

touch hosts.txt

author(){

echo "----------------------------------------------------------------------------------------------------"

echo "- keepalived和ipvsadm部署完毕 -"

echo "- 作者：lxl -"

echo "- 微信：l15565623507 -"

echo "----------------------------------------------------------------------------------------------------"

}

keepalived_ipvsadm(){

index=0

real_n=0

keep=/etc/keepalived/keepalived.conf

yum -y -q install ipvsadm keepalived &>/dev/null

echo -e "e[1;33m----------------------安装ipvsadm和keepalived成功-------------------------e[0m"

sed -i 's/ interface eth0/ interface ens33/g' $keep

echo -e "e[1;33m----------------------修改网卡成功---------------------------------------e[0m"

sed -i -e '60,$d' -i -e '31,32d' $keep

sed -i '44,51d' $keep

sed -i '41,48d' $keep

echo -e "e[1;33m----------------------删除多余行成功-------------------------------------e[0m"

sed -i 's/ vrrp_strict/ #vrrp_strict/g' $keep

echo -e "e[1;33m----------------------注释 vrrp_strict成功-------------------------------e[0m"

sed -i 's/ persistence_timeout 50/ #persistence_timeout 50/g' $keep

echo -e "e[1;33m----------------------注释 persistence_timeout 50成功--------------------e[0m"

sed -i 's/ lb_kind NAT/ lb_kind DR/g' $keep

echo -e "e[1;33m----------------------修改为DR模式成功-----------------------------------e[0m"

read -p "请输入VIP地址：" VIP

sed -i 's/ 192.168.200.16/ '"$VIP"'/g' $keep

sed -i 's/virtual_server 192.168.200.100 443 {/virtual_server '"$VIP"' 80 {/g' $keep

echo -e "e[1;33m----------------------增加VIP地址成功-----------------------------------e[0m"

ipvsadm -A -t $VIP:80 -s rr

while :

do

read -p "请输入真实服务器的个数：" n

if [ $n -gt 0 ];then

while :

do

read -p "请输入真实服务器的IP地址：" RVIP

array[$index]=$RVIP

#定义 hosts.txt

cat >> hosts.txt << EOF

$RVIP

EOF

index=` expr $index + 1`

real_n=`expr $real_n + 1`

if [ $real_n -eq $n ]; then

break

fi

done

break

else

echo "真实服务器的个数必须大于0"

fi

done

if [ $index -gt 1 ]; then

index=0

a=0

line=39

while :

do

 

sed -i ''"$line"'a real_server '"${array[$index]}"' 80 { 

weight 1 

TCP_CHECK { 

connect_prot 80 

connect_timeout 3 

nb_get_retry 3 

delay_before_retry 3 

} 

}' $keep

ipvsadm -a -t $VIP:80 -r ${array[$index]}:80 -g

line=` expr $line + 9`

index=` expr $index + 1`

a=` expr $a + 1 `

if [ $a -eq $n ]; then

break

fi

done

else

sed -i '39a real_server '"${array[$index]}"' 80 { 

weight 1 

TCP_CHECK { 

connect_prot 80 

connect_timeout 3 

nb_get_retry 3 

delay_before_retry 3 

} 

}' $keep

fi

systemctl restart keepalived

echo -e "e[1;33m----------------------keepalived启动成功-------------------------------------e[0m"

 

for i in {1..10}

do

echo "-"

done

read -p "是否做过免密环境（yes/no）:" pass

if [ $pass == "no" ]; then

rpm -q expect

if [ $? -eq 0 ]; then

echo -e "e[1;33m--已安装--e[0m"

else

yum -y install expect &>/dev/null

if [ $? -eq 0 ]; then

echo -e "e[1;33m--安装成功--e[0m"

else

echo -e "e[1;33m--安装失败--e[0m"

fi

fi

#本机是否有ssh密钥 没有则生成

if [ ! -f ~/.ssh/id_rsa ]; then

echo -e "e[1;33m--请按3次enter健--e[0m"

ssh-keygen -t rsa

fi

ssh_expect() {

expect -c "set timeout -1;

spawn ssh-copy-id root@$1

expect {

"yes/no" { send -- yes
;exp_continue;}

"password:" { send -- $2
;exp_continue;}

eof

}";

}

read -p "请输入真实服务器密码：" passwd

for ip in `cat hosts.txt|awk '{print $1}'`

do

ssh_expect ${ip} ${passwd}

done

 

else

break

fi

ipvsadm(){

touch ipvsadm.sh

path=`pwd`/ipvsadm.sh

rvip=$VIP

cat >> ipvsadm.sh<<EOF

#!/usr/bin/bash

cd /etc/sysconfig/network-scripts/

cp ifcfg-lo ifcfg-lo:0

sed -i 's/DEVICE=lo/DEVICE=lo:0/g' ifcfg-lo:0

sed -i 's/IPADDR=127.0.0.1/IPADDR=$rvip/g' ifcfg-lo:0

sed -i 's/NETMASK=255.0.0.0/NETMASK=255.255.255.255/g' ifcfg-lo:0

sed -i '4,7d' ifcfg-lo:0

sed -i '5d' ifcfg-lo:0

systemctl restart network

echo -e "e[1;33m----------------------网卡修改成功-------------------------------------e[0m"

echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore

echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore

echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce

echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce

echo -e "e[1;33m----------------------响应级别修改成功-------------------------------------e[0m"

route add $rvip dev lo

echo -e "e[1;33m----------------------路由增加成功-------------------------------------e[0m"

EOF

 

ifip=`ifconfig |grep inet|awk 'NR==1{print$2}'`

for ip in `cat hosts.txt|awk '{print $1}'`

do

ssh root@$ip "mkdir -p /opt/lxl"

scp root@$ifip:$path $ip:/opt/lxl/

ssh root@$ip "sh /opt/lxl/ipvsadm.sh"

done

}

}

keepalived_ipvsadm

ipvsadm

author