nginx+keepalived的高可用脚本

Posted 2021-02-27 wanglinyan

#/bin/bash

read -ep "请输入keepalived所在的本地IP:" IP

read -ep "请输入另一台keepalived所在的本地IP:" IP2

read -ep "请输入你创建的keepalived的VIP:" net

read -ep "请输入ngixn负载的IP:" fu

read -ep "请输入ngixn负载的另一条IP:" fu2

read -ep "是否终止(y),默认不终止" yn

if [ $yn == y ];then

 exit

fi

yum -y install keepalived

sed -i ‘/notification_email {/,/smtp_connect_timeout 30/d‘ /etc/keepalived/keepalived.conf

sed -i ‘/vrrp_skip_check_adv_addr/,/vrrp_gna_interval 0/d‘ /etc/keepalived/keepalived.conf

sed -i ‘s/eth0/ens33/‘ /etc/keepalived/keepalived.conf

sed -i ‘/persistence_timeout 50/d‘ /etc/keepalived/keepalived.conf

sed -i ‘/real_server/,$d‘ /etc/keepalived/keepalived.conf

sed -i ‘/192.168.200.16/,/192.168.200.17/d‘ /etc/keepalived/keepalived.conf

sed -i "s/192.168.200.18/$net/" /etc/keepalived/keepalived.conf

sed -i "s/192.168.200.100 443/$net 80/" /etc/keepalived/keepalived.conf

chmod +x /etc/keepalived/bb.sh

shu=`cat /etc/keepalived/keepalived.conf|grep real_server|wc -l`

if [ $shu -ne 1 ];then

echo "    real_server $IP 80 {

        weight 1

        notify_down /etc/keepalived/bb.sh

        TCP_CHECK {

            connect_timeout 3

            nb_get_retry 3

            delay_before_retry 3

            connect_port 80

        }  

    }  

}

" >>/etc/keepalived/keepalived.conf

fi

echo ‘#!/bin/bash

systemctl stop keepalived‘>/etc/keepalived/bb.sh

chmod +x /etc/keepalived/bb.sh

yum -y install expect

if [ -f /root/.ssh/id_rsa ]||[ -f id_rsa.pub ];then

  continue

else

/usr/bin/expect <<EOF 

spawn ssh-keygen -t rsa

expect ":" {send " ;"}

expect ":" {send " ;"}

expect ":" {send " ;"}

expect eof

EOF

fi

/usr/bin/expect <<EOF

spawn ssh-copy-id root@$IP2

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

EOF

ssh root@$IP2 ‘yum -y install keepalived‘

scp /etc/keepalived/keepalived.conf $IP2:/etc/keepalived/keepalived.conf

scp /etc/keepalived/bb.sh $IP2:/etc/keepalived/bb.sh

/usr/bin/expect<<EOF

spawn ssh root@$IP2 

expect "~" {send "sed -i ‘s/$IP/$IP2/‘ /etc/keepalived/keepalived.conf "}

expect "~" {send "sed -i ‘s/priority 100/priority 99/‘ /etc/keepalived/keepalived.conf "}

expect "~" {send "sed -i ‘s/MASTER/BACKUP/‘ /etc/keepalived/keepalived.conf "}

expect "~" {send "exit "}

expect eof

EOF

wget http://nginx.org/download/nginx-1.16.1.tar.gz

yum -y install gcc gcc-c++ zlib-devel pcre-devel

tar zxf nginx-1.16.1.tar.gz

cd nginx-1.16.1 && ./configure && make && make install

shulian=`cat /usr/local/nginx/conf/nginx.conf|grep ‘server $fu2:8081;‘|wc -l`

if [ $shulian -ne 1 ];then

sed -i  ‘/#gzip  on;/aupstream wg{‘ /usr/local/nginx/conf/nginx.conf

sed -i  "/upstream wg{/aserver $fu:8080;" /usr/local/nginx/conf/nginx.conf

sed -i  "/server $fu:8080;/aserver $fu2:8081;" /usr/local/nginx/conf/nginx.conf

sed -i  "/server $fu2:8081/a}" /usr/local/nginx/conf/nginx.conf

sed -i  ‘s/index.htm;$/index.jsp;/‘ /usr/local/nginx/conf/nginx.conf

sed -i  ‘/404.html;/alocation ~ \.jsp$ {‘ /usr/local/nginx/conf/nginx.conf

sed -i  ‘/location ~ \.jsp$ {/aproxy_pass   http://wg;‘ /usr/local/nginx/conf/nginx.conf

sed -i  ‘/proxy_pass   http://wg;/a}‘ /usr/local/nginx/conf/nginx.conf

fi

pkill -15 nginx

/usr/local/nginx/sbin/nginx

systemctl restart keepalived

ssh root@$IP2 ‘wget http://nginx.org/download/nginx-1.16.1.tar.gz;yum -y install gcc gcc-c++ zlib-devel pcre-devel;tar zxf nginx-1.16.1.tar.gz;cd nginx-1.16.1 && ./configure && make && make install‘

scp /usr/local/nginx/conf/nginx.conf $IP2:/usr/local/nginx/conf/nginx.conf

ssh root@$IP2 ‘pkill -15 nginx;/usr/local/nginx/sbin/nginx;systemctl restart keepalived‘