centos7.9部署keepalived

tar -xf keepalived-2.2.2.tar.gz 
cd keepalived-2.2.2
./configure --prefix=/data/keepalived
make
make install

ln -s /data/keepalived/sbin/keepalived /usr/sbin/keepalived
keepalived -v

vim /usr/lib/systemd/system/keepalived.service
[Unit]
Description=LVS and VRRP High Availability Monitor
After=network-online.target syslog.target
Wants=network-online.target

[Service]
Type=forking
PIDFile=/run/keepalived.pid
KillMode=process
EnvironmentFile=-/data/keepalived/etc/sysconfig/keepalived
ExecStart=/data/keepalived/sbin/keepalived  $KEEPALIVED_OPTIONS
ExecReload=/bin/kill -HUP $MAINPID

[Install]
WantedBy=multi-user.target

mkdir /etc/keepalived
cp /data/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
   notification_email {
     root@localhost
   }
   notification_email_from keepalived@localhost
   smtp_server 127.0.0.1
   smtp_connect_timeout 10
   router_id kp_ng01
}
vrrp_script chk_nginx {
    script "/etc/keepalived/sh/check.sh"
    interval 3
}
vrrp_instance VI_1 {
    state MASTER
    interface ens192
    virtual_router_id 70
    priority 100
    advert_int 2
    authentication {
    auth_type PASS
    auth_pass 12345
    }
    track_script {
        chk_nginx
        }
    virtual_ipaddress {
        172.16.30.161
    }
}

#!/bin/bash
echo "[nginx_check.sh]:now prepareing to healthy check " >> /var/log/messages
n=`netstat -tunlp | grep nginx|wc -l`
if [ $n -eq "0" ]; then
echo "[ nginx_check.sh]:now start nginx">> /var/log/messages
/data/nginx/sbin/nginx
n2=`netstat -tunlp | grep nginx|wc -l`
if [ $n2 -eq "0" ]; then
echo "[nginx_check.sh]:nginx down,keepalived will stop" >> /var/log/messages
systemctl stop keepalived
fi
fi

mkdir /etc/keepalived
cp /data/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
   notification_email {
     root@localhost
   }
   notification_email_from keepalived@localhost
   smtp_server 127.0.0.1
   smtp_connect_timeout 10
   router_id kp_ng02
}
vrrp_script chk_nginx {
    script /etc/keepalived/sh/check.sh
    interval 3
#    weight -20
#    fall 2
#    rise 1
}
vrrp_instance VI_1 {
    state BACKUP
    interface ens192
    virtual_router_id 70
    priority 90
    advert_int 2
    authentication {
    auth_type PASS
    auth_pass 12345
    }
    track_script {
        chk_nginx
        }
    virtual_ipaddress {
        172.16.30.161
    }
}

#!/bin/bash
echo "[nginx_check.sh]:now prepareing to healthy check " >> /var/log/messages
n=`netstat -tunlp | grep nginx|wc -l`
if [ $n -eq "0" ]; then
echo "[ nginx_check.sh]:now start nginx">> /var/log/messages
/data/nginx/sbin/nginx
n2=`netstat -tunlp | grep nginx|wc -l`
if [ $n2 -eq "0" ]; then
echo "[nginx_check.sh]:nginx down,keepalived will stop" >> /var/log/messages
systemctl stop keepalived
fi
fi

/data/keepalived/etc/sysconfig/keepalived
KEEPALIVED_OPTIONS="-D -d -S 0"

vim /etc/rsyslog.conf
local0.*  /var/log/keepalived.log

systemctl restart rsyslog
systemctl restart keepalived