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

环境

两台LVS服务一主一备

两台web服务采用nginx （实现LVS负载均衡）

服务ip 主LVS 192.168.100.3

备LVS 192.168.100.6

web1 192.168.100.4

web2 192.168.100.5

LVS配置

配置静态ip 配置虚ip

安装ipvsadm

yum install -y ipvsadm

touch /etc/sysconfig/ipvsadm

调整ARP参数

vim /etc/sysctl.conf

net.ipv4.conf.all.send_redirects = 0

net.ipv4.conf.default.send_redirects=0

net.ipv4.conf.ens33.send_redirects = 0

sysctl -p

配置分配策略

systemctl start ipvsadm

ipvsadm -A -t 192.168.100.200:80 -s rr

ipvsadm -a -t 192.168.100.200:80 -r 192.168.100.4:80 -g

ipvsadm -a -t 192.168.100.200:80 -r 192.168.100.5:80 -g

配置web

安装 epel-release

安装 nginx

修改网页文件 web1 nginx1

web2 nginx2

调整webARP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web虚拟ip

cd /etc/sysconfig/network-scripts/

cp ifcfg-lo ifcfg-lo:0

vim ifcfg-lo:0

DEVICE=lo:0

IPADDR=192.168.100.200

NETMASK=255.255.255.255

ONBOOT=yes

NAME=loopback:0