Keepalived+LVS（DR）

概述：

使用keepalived解决lvs的单点故障，实现高可用集群

开始之前准备六台虚拟机，搭建环境

systemctl stop NetworkManager

systemctl disable NetworkManager

systemctl stop firewalld

systemctl disable firewalld

setenforce 0

vim /etc/selinux/config

SELINUX=disabled

客户端	ip：192.168.115.199
keepalived+lvs1	ip：192.168.115.200
keepalived+lvs2	ip：192.168.115.201
web1	ip：192.168.115.202
web2	ip：192.168.115.203
nfs共享存储	ip：192.168.115.204

目录

一、调度器配置

二、web节点配置

---

一、调度器配置

1、安装keepalived、安装ipvsadm

yum install -y keepalived        安装

yum install -y ipvsadm        安装

modprobe ip_vs        加载模块

lsmod | grep ip_vs        查看模块

2、配置keepalived

主

global_defs {
   router_id MASTER
}

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 {
    192.168.115.100        
    }
}

virtual_server 192.168.115.100 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    #persistence_timeout 50
    protocol TCP

    real_server 192.168.115.202 80 {
        weight 1
        HTTP_GET {
            url {
              path /
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
    real_server 192.168.115.203 80 {
        weight 1
        HTTP_GET {
            url {
              path /
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}
从

global_defs {
   router_id BACKUP
}

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 {
    192.168.115.100        
    }
}

virtual_server 192.168.115.100 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
   # persistence_timeout 50
    protocol TCP

    real_server 192.168.115.202 80 {
        weight 1
        HTTP_GET {
            url {
              path /
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
    real_server 192.168.115.203 80 {
        weight 1
        HTTP_GET {
            url {
              path /
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}
3、查看lvs节点状态

ipvsadm -ln

二、web节点配置

1、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

2、配置虚拟IP地址

cp ifcfg-lo ifcfg-lo:0

vim ifcfg-lo:0

DEVICE=lo:0
IPADDR=192.168.115.200
NETMASK=255.255.255.255
ONBOOT=yes
NAME=loopback:0
wq

route add -host 192.168.115.100/32 dev lo:0

3、安装httpd

yum -y install httpd

systemctl start httpd

vim /var/www/html/index.html

web1

wq

 

nfs共享存储搭建好之后安装，创建共享目录挂载到两个web节点就好了

下次见