ha+keeplived

环境准备
关闭selinux和防火墙
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
systemctl stop firewalld
systemctl disable firewalld
192.168.1.13	haproxy节点keepalived主节点
192.168.1.14	haproxy节点keepalived副节点
192.168.1.15	web服务器
192.168.1.16	web服务器

1. 13和14两台服务器分别下载haproxy跟keepalived

   yum -y install haproxy keepalived
   

2. 配置13跟14两台服务器的haproxy的配置文件

   global
       log         127.0.0.1 local2
       chroot      /var/lib/haproxy
       pidfile     /var/run/haproxy.pid
       maxconn     4000
       user        haproxy
       group       haproxy
       daemon
   
       # turn on stats unix socket
       stats socket /var/lib/haproxy/stats
   
   defaults
       mode                    http
       log                     global
       option                  httplog
       option                  dontlognull
       option http-server-close
       option forwardfor       except 127.0.0.0/8
       option                  redispatch
       retries                 3
       timeout http-request    10s
       timeout queue           1m
       timeout connect         10s
       timeout client          1m
       timeout server          1m
       timeout http-keep-alive 10s
       timeout check           10s
       maxconn                 3000
   
   frontend  app
   	mode http
   	bind *:9090
   	option tcplog
       default_backend             app
   
   backend app
       balance     roundrobin
       server  192.168.1.15 192.168.1.15:8080 check
       server  192.168.1.16 192.168.1.16:8080 check
   listen stats
   	bind *:1080
   	stats auth admin:success123
   	stats refresh 5s
   	stats realm HAProxy\ Statistics
   	stats uri /admin
   
   

   systemctl start haproxy
   systemctl enable haproxy
   测试访问
   192.168.1.13:9090/test/index.html
   后端监控
   192.168.1.13:1080/admin
   

   配置13的keepalived

   vim /etc/keepalived/keepalived.conf
   

   ! Configuration File for keepalived
   
   global_defs {
      
      router_id app_router
   }
   
   vrrp_script check_script {
   	script "killall -0 haproxy"
   	interval 3
   	weight -2
   	fall 10
   	rise 2
   }
   
   vrrp_instance VI_1 {
       state MASTER
       interface ens33
       virtual_router_id 41
       priority 200
       advert_int 1
       authentication {
           auth_type PASS
           auth_pass 1111
       }
       virtual_ipaddress {
           192.168.1.254
       }
       tarck_script {
       	check_haproxy
       }
   }
   
   
   

   配置14的keepalived.conf

   ! Configuration File for keepalived
   
   global_defs {
      
      router_id app_router
   }
   
   vrrp_script check_script {
   	script "killall -0 haproxy"
   	interval 3
   	weight -2
   	fall 10
   	rise 2
   }
   
   vrrp_instance VI_1 {
       state BACKUP
       interface ens33
       virtual_router_id 41
       priority 100
       advert_int 1
       authentication {
           auth_type PASS
           auth_pass 1111
       }
       virtual_ipaddress {
           192.168.1.254
       }
       tarck_script {
       	check_haproxy
       }
   }
   

   配置13和14的keepalived

   systemctl start keepalived
   systemctl enable keepalived
   

   测试访问

   关掉13服务器查看虚拟ip是否跳到14上

   并且访问虚拟ip

   192.168.1.254:9090/test/index.html