1. VMware;
2. 4台CentOs7虚拟主机：192.168.122.217, 192.168.122.165
3. 系统服务：LVS, Keepalived
4. Web服务器：nginx在2台虚拟机上，我们以如下方式搭建集群：
192.168.122.217 nginx-1+keepalived-1
192.168.122.165 nginx-2+keepalived-2
两台机器安装keeplived和nginx
yum install -y keepalived nginx
接下来我们要配置keeplive服务
192.168.122.217配置
cat > /etc/keepalived/keepalived.conf <<EOF ! Configuration File for keepalived global_defs { router_id 192.168.122.217 } vrrp_script chk_nginx { script "/etc/keepalived/check_nginx.sh" interval 2 weight -20 } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 251 priority 100 advert_int 1 mcast_src_ip 192.168.122.217 nopreempt authentication { auth_type PASS auth_pass 11111111 } track_script { chk_nginx } virtual_ipaddress { 192.168.122.50 } } EOF ## 192.168.122.217 为节点IP，192.168.122.50 VIP
192.168.122.165配置
cat > /etc/keepalived/keepalived.conf <<EOF ! Configuration File for keepalived global_defs { router_id 192.168.122.165 } vrrp_script chk_nginx { script "/etc/keepalived/check_nginx.sh" interval 2 weight -20 } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 251 priority 100 advert_int 1 mcast_src_ip 192.168.122.165 nopreempt authentication { auth_type PASS auth_pass 11111111 } track_script { chk_nginx } virtual_ipaddress { 192.168.122.50 } } EOF ## 192.168.122.165 为节点IP，192.168.122.50 VIP
创建健康检查脚本,脚本放在/etc/keepalived/check_nginx.sh ，两台机都要放
[root@fefgegrege opt]# cat check_nginx.sh PORT_PROCESS=`ps aux|grep -v grep|grep nginx|wc -l` if [ $PORT_PROCESS -eq 0 ];then echo "nginx Is Not Used,End." exit 1 fi echo "Check nginx Cant Be Empty!"
两台机启动keeplived
[root@gergergrehre]# systemctl enable --now keepalived Created symlink from /etc/systemd/system/multi-user.target.wants/keepalived.service to /usr/lib/systemd/system/keepalived.service.
启动完毕后ping 192.168.122.50 (VIP)
[root@hdththt ~]# ping 192.168.122.50 PING 192.168.122.50 (192.168.122.50) 56(84) bytes of data. 64 bytes from 192.168.122.50: icmp_seq=1 ttl=64 time=1.37 ms 64 bytes from 192.168.122.50: icmp_seq=2 ttl=64 time=0.515 ms 64 bytes from 192.168.122.50: icmp_seq=3 ttl=64 time=0.594 ms 64 bytes from 192.168.122.50: icmp_seq=4 ttl=64 time=0.831 ms ^C --- 192.168.122.50 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3001ms rtt min/avg/max/mdev = 0.515/0.829/1.376/0.336 ms #如果没有启动，请检查原因。 ps -ef|grep keep 检查是否启动成功 #没有启动成功，请执行下面命令，从新启动。启动成功vip肯定就通了 systemctl start keepalived
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