keepalived+lvs（DR）（四十六）

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目录

前言

一、作用

二、调度器配置

三、web节点配置

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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 {
     [email protected]
     [email protected]
     [email protected]
   }
   notification_email_from [email protected]
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL1
   vrrp_skip_check_adv_addr
   #vrrp_strict
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}

vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
	192.168.156.200		
    }
}

virtual_server 192.168.156.200 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    #persistence_timeout 50
    protocol TCP

    real_server 192.168.156.14 80 {
        weight 1
        HTTP_GET {
            url {
              path /
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
    real_server 192.168.156.15 80 {
        weight 1
        HTTP_GET {
            url {
              path /
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}

    从

global_defs {
   notification_email {
     [email protected]
     [email protected]
     [email protected]
   }
   notification_email_from [email protected]
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL2
   vrrp_skip_check_adv_addr
   #vrrp_strict
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 51
    priority 90
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
	192.168.156.200		
    }
}

virtual_server 192.168.156.200 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
   # persistence_timeout 50
    protocol TCP

    real_server 192.168.156.14 80 {
        weight 1
        HTTP_GET {
            url {
              path /
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
    real_server 192.168.156.15 80 {
        weight 1
        HTTP_GET {
            url {
              path /
            }
            connect_timeout 3
            nb_get_retry 3
            delay_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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