LVS+keepalived部署实践

LVS+keepalived部署实践

一、部署keepalived
二、web服务器操作和检查
三、keepalived详细配置

一、部署keepalived

keealived并不通过ipvsadm来管理lvs，而是自身通过配置文件直接管理lvs;
keepalived三个功能：管理lvs、高可用、节点健康检查

安装keepalived[lb03,lb04]

yum -y install keepalived

全局配置
mark
VIP配置
mark
lvs的配置[两台一样]
mark
启动keepalived并检查

systemctl start keepalived.service
systemctl status keepalived.service

二、web服务器操作和检查

lo绑定vip

ip addr add 10.0.0.13/32 dev lo
修改内核参数

cat >>/etc/sysctl.conf<<EOF
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2
EOF
sysctl -p

以上完成即可开始测试并验证了

三、keepalived详细配置

[root@xxx ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
   router_id LVS_DEVEL-1
}
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 150
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        10.0.0.3/24 dev eth0 label eth0:1
    }
}
#ipvsadm -A -t 10.0.0.3:80 -s wrr
virtual_server 10.0.0.3 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    nat_mask 255.255.255.0
    persistence_timeout 50
    protocol TCP
#ipvsadm -a -t 10.0.0.3:80 -r 10.0.0.7:80 -g -w 1
        real_server 10.0.0.7 80 {
        weight 1
        TCP_CHECK {
            connect_timeout 5
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }
#ipvsadm -a -t 10.0.0.3:80 -r 10.0.0.8:80 -g -w 1
        real_server 10.0.0.8 80 {
        weight 1
        TCP_CHECK {
            connect_timeout 5
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }
}

从注释掉的ipvsadm …开始为在原配置上增加