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一、作用

    使用keepalived解决lvs的单点故障
    高可用集群

二、调度器配置

    安装keepalived
        yum install -y keepalived

    安装ipvsadm
        yum install -y ipvsadm

        modprobe ip_vs 

    配置keepalived

        主 

global_defs {notification_email {acassen@firewall.locfailover@firewall.locsysadmin@firewall.loc}notification_email_from Alexandre.Cassen@firewall.locsmtp_server 192.168.200.1smtp_connect_timeout 30router_id LVS_DEVEL1vrrp_skip_check_adv_addr#vrrp_strictvrrp_garp_interval 0vrrp_gna_interval 0
}vrrp_instance VI_1 {state MASTERinterface ens33virtual_router_id 51priority 100advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.156.200		}
}virtual_server 192.168.156.200 80 {delay_loop 6lb_algo rrlb_kind DR#persistence_timeout 50protocol TCPreal_server 192.168.156.14 80 {weight 1HTTP_GET {url {path /}connect_timeout 3nb_get_retry 3delay_before_retry 3}}real_server 192.168.156.15 80 {weight 1HTTP_GET {url {path /}connect_timeout 3nb_get_retry 3delay_before_retry 3}}
}

    从

global_defs {notification_email {acassen@firewall.locfailover@firewall.locsysadmin@firewall.loc}notification_email_from Alexandre.Cassen@firewall.locsmtp_server 192.168.200.1smtp_connect_timeout 30router_id LVS_DEVEL2vrrp_skip_check_adv_addr#vrrp_strictvrrp_garp_interval 0vrrp_gna_interval 0
}vrrp_instance VI_1 {state BACKUPinterface ens33virtual_router_id 51priority 90advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.156.200		}
}virtual_server 192.168.156.200 80 {delay_loop 6lb_algo rrlb_kind DR# persistence_timeout 50protocol TCPreal_server 192.168.156.14 80 {weight 1HTTP_GET {url {path /}connect_timeout 3nb_get_retry 3delay_before_retry 3}}real_server 192.168.156.15 80 {weight 1HTTP_GET {url {path /}connect_timeout 3nb_get_retry 3delay_before_retry 3}}
}

 查看lvs节点状态
        ipvsadm -ln 

 查看IP ip a

三、web节点配置

调整ARP参数
    vim /etc/sysctl.conf
    net.ipv4.conf.all.arp_ignore=1 
net.ipv4.conf.all.arp_announce=2 
net.ipv4.conf.default.arp_ignore=1 
net.ipv4.conf.default.arp_announce = 2 
net.ipv4.conf.lo.arp_ignore = 1 
net.ipv4.conf.lo.arp_announce=2
    sysctl -p

 

 配置虚拟IP地址
    cd /etc/sysconfig/network-scripts/
    cp ifcfg-lo ifcfg-lo:0
    vim ifcfg-lo:0

 添加回环路由
    route add -host 192.168.156.200/32 dev lo:0

 安装nginx测试

 

 

 断掉主，测试备

 

 

 

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