LVS_dr模式+keepalived

LVS_Director &＃43; KeepAlivedKeepAlived在该项目中的功能&＃xff1a;
1. 管理IPVS的路由表&＃xff08;包括对RealServer做健康检查&＃xff09;
2. 实现调度器的HA(高可用)
http://www.keepalived.orgKeepalived所执行的外部脚本命令建议使用绝对路径
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实施步骤&＃xff1a;
1. 主/备调度器安装软件
[root&＃64;lvs-keepalived-master ~]# yum -y install ipvsadm keepalived
[root&＃64;lvs-keepalived-slave ~]# yum -y install ipvsadm keepalived
2. Keepalived
lvs-master
[root&＃64;lvs-keepalived-master ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs {router_id lvs-keepalived-master #辅助改为lvs-backup
}vrrp_instance VI_1 {state MASTERinterface ens33 #VIP绑定接口virtual_router_id 80 #VRID 同一组集群&＃xff0c;主备一致 priority 100 #本节点优先级&＃xff0c;辅助改为50advert_int 1 #检查间隔&＃xff0c;默认为1sauthentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.246.110/24}
}virtual_server 192.168.246.110 80 { #LVS配置delay_loop 3 #启动3个进程lb_algo rr #LVS调度算法lb_kind DR #LVS集群模式&＃xff08;路由模式&＃xff09;nat_mask 255.255.255.0protocol TCP #健康检查使用的协议real_server 192.168.246.162 80 {weight 1inhibit_on_failure #当该节点失败时&＃xff0c;把权重设置为0&＃xff0c;而不是从IPVS中删除TCP_CHECK { #健康检查connect_port 80 #检查的端口connect_timeout 3 #连接超时的时间}}real_server 192.168.246.163 80 {weight 1inhibit_on_failureTCP_CHECK {connect_timeout 3connect_port 80}}
}[root&＃64;lvs-keepalived-slave ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs {router_id lvs-keepalived-slave
}vrrp_instance VI_1 {state BACKUPinterface ens33nopreempt #不抢占资源virtual_router_id 80priority 50advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.246.110/24}
}
virtual_server 192.168.246.110 80 {delay_loop 3lb_algo rrlb_kind DRnat_mask 255.255.255.0protocol TCPreal_server 192.168.246.162 80 {weight 1inhibit_on_failureTCP_CHECK {connect_port 80connect_timeout 3}}real_server 192.168.246.163 80 {weight 1inhibit_on_failureTCP_CHECK {connect_timeout 3connect_port 80}}
}
3. 启动KeepAlived&＃xff08;主备均启动&＃xff09;
[root&＃64;lvs-keepalived-master ~]# systemctl start keepalived
[root&＃64;lvs-keepalived-master ~]# systemctl enable keepalived[root&＃64;lvs-keepalived-master ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size&＃61;4096)
Prot LocalAddress:Port Scheduler Flags-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.246.110:80 rr persistent 20-> 192.168.246.162:80 Route 1 0 0 -> 192.168.246.163:80 Route 0 0 04. 所有RS配置(nginx1,nginx2)
配置好网站服务器&＃xff0c;测试所有RS
[root&＃64;test-nginx1 ~]# yum install -y nginx
[root&＃64;test-nginx2 ~]# yum install -y nginx[root&＃64;test-nginx1 ~]# ip addr add dev lo 192.168.246.110/32
[root&＃64;test-nginx2 ~]# ip addr add dev lo 192.168.246.110/32[root&＃64;test-nginx1 ~]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore #忽略arp广播
[root&＃64;test-nginx1 ~]# echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce #匹配精确ip地址回包[root&＃64;test-nginx2 ~]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore #忽略arp广播
[root&＃64;test-nginx2 ~]# echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce #匹配精确ip地址回包[root&＃64;test-nginx1 ~]# echo "web1..." >> /usr/share/nginx/html/index.html
[root&＃64;test-nginx2 ~]# echo "web2..." >> /usr/share/nginx/html/index.html
[root&＃64;test-nginx1 ~]# systemctl start nginxLB集群测试
所有分发器和Real Server都正常主分发器故障及恢复