Web服务器群集——LVSDR+Keepalived配置步骤

详细步骤和配置解释可以参考&＃xff1a;LVS-DR&＃43;Keepalived 高可用集群

之前写的主要是先做lvs-dr再做keepalived 因此步骤显得比较麻烦 今天再写一个简要步骤

调度器上安装Keepalived

yum install -y ipvsadm
yum install -y keepalived

调度主机上做lvs策略

配置负载分配策略
首先清除原有策略
ipvsadm -C添加虚拟服务器
ipvsadm -A -t 192.168.188.188:80 -s rr添加真实服务器 工作模式为DR
ipvsadm -a -t 192.168.188.188:80 -r 192.168.188.100:80 -g
ipvsadm -a -t 192.168.188.188:80 -r 192.168.188.101:80 -g保存
ipvsadm-save > /etc/sysconfig/ipvsadm查看
ipvsadm -Ln
IP Virtual Server version 1.2.1 (size&＃61;4096)
Prot LocalAddress:Port Scheduler Flags-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.188.188:80 rr-> 192.168.188.100:80 Route 1 0 0 -> 192.168.188.101:80 Route 1 0 0

从机不需要配置策略 因为keepalived会自动解析策略

主机

vim /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_defs {router_id LVS1
}vrrp_instance VI_1 {state MASTERinterface ens33virtual_router_id 66priority 100advert_int 1authentication {auth_type PASSauth_pass 123456}virtual_ipaddress {192.168.188.188}
}virtual_server 192.168.188.188 80 {delay_loop 6lb_algo rrlb_kind DRprotocol TCPreal_server 192.168.188.100 80 {weight 1TCP_CHECK {connect_port 80connect_timeout 3nb_get_retry 3delay_before_retry 4}}real_server 192.168.188.101 80 {weight 1TCP_CHECK {connect_port 80connect_timeout 3nb_get_retry 3delay_before_retry 4}}
}

从机

! Configuration File for keepalivedglobal_defs {router_id LVS2
}vrrp_instance VI_1 {state BACKUPinterface ens33virtual_router_id 66priority 80advert_int 1authentication {auth_type PASSauth_pass 123456}virtual_ipaddress {192.168.188.188}
}virtual_server 192.168.188.188 80 {delay_loop 6lb_algo rrlb_kind DRprotocol TCPreal_server 192.168.188.100 80 {weight 1TCP_CHECK {connect_port 80connect_timeout 3nb_get_retry 3delay_before_retry 4}}real_server 192.168.188.101 80 {weight 1TCP_CHECK {connect_port 80connect_timeout 3nb_get_retry 3delay_before_retry 4}}
}


重启服务
systemctl restart ipvsadm
systemctl restart keepalived查看keepalived配置完成后 ens33是否有了VIP
ip addr从机查看策略
ipvsadm -lnIP Virtual Server version 1.2.1 (size&＃61;4096)
Prot LocalAddress:Port Scheduler Flags-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.188.188:80 rr-> 192.168.188.100:80 Route 1 0 0 -> 192.168.188.101:80 Route 1 0 0

配置真实服务器

添加虚拟接口lo:0 配置VIP地址
cp -a ifcfg-lo ifcfg-lo:0vim ifcfg-lo:0DEVICE&＃61;lo:0
IPADDR&＃61;192.168.188.188
NETMASK&＃61;255.255.255.255
NETWORK&＃61;127.0.0.0
BROADCAST&＃61;127.255.255.255
ONBOOT&＃61;yes
NAME&＃61;loopback然后将网卡传给另一台web服务器
scp ./ifcfg-lo:0 root&＃64;192.168.188.101:/root开启虚拟接口
ifup lo:0添加一条到VIP的本地路由
route add -host 192.168.188.188 dev lo:0查看路由
route -nKernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.188.2 0.0.0.0 UG 100 0 0 ens33
192.168.79.0 0.0.0.0 255.255.255.0 U 101 0 0 ens37
192.168.188.0 0.0.0.0 255.255.255.0 U 100 0 0 ens33
192.168.188.188 0.0.0.0 255.255.255.255 UH 0 0 0 lo
测试

浏览器输入VIP


关闭主调度器 浏览器仍然可以访问 查看从机信息