lvs+keepalived

最新推荐文章于 2024-08-16 10:07:01 发布

侯鹏程的博客园

最新推荐文章于 2024-08-16 10:07:01 发布

阅读量125

点赞数

文章标签：负载均衡

本文链接：https://blog.youkuaiyun.com/houpengchengcsdn/article/details/115866020

版权

永久保存ipvadm规则
ipvsadm -Sn

永久设置arp级别
vim /etc/sysctl.conf
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
sysctl -p

lvs 没有健康检查
keepalived

通过keepalived来管理lvs

1.可以自动生成VIP地址
2.可以自动创建虚拟服务器和真实服务器
3.可以实现对后端的真实服务器实现健康检查，工作异常的主机，会从调度表中移除，恢复后再自动添加回来
4.可以实现lvs的高可用

搭建keepalived+lvs负载均集群

环境准备：
4台虚拟机
LVS-Master:
DIP: 192.168.189.172
VIP: 192.168.189.181
LVS-Backup:
DIP: 192.168.189.173
RS1:
RIP: 192.168.189.174
RS2:
RIP: 192.168.189.175

安装配置

LVS-Master

yum -y install keepalived ipvsadm

修改keepalived配置文件

vim /etc/keepalived/keepalived.conf

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 {
192.168.189.181
}
}
virtual_server 192.168.189.181 80 { \定义一个虚拟服务器
delay_loop 6
lb_algo rr \负载均衡算法
lb_kind DR \工作模式
protocol TCP \tcp协议

real_server 192.168.189.174 80 {   \\定义一个真实服务器
    weight 1    \\权重值
    TCP_CHECK {   \\健康检查TCP连接端口
        connect_port 80
        connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
    }
}
real_server 192.168.189.175 80 {
    weight 1
    TCP_CHECK {
        connect_port 80
        connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
    }
}

}

systemctl start keepalived

systemctl enable keepalived

测试
1.查看VIP是否生成
# ip a
2.查看lvs的调度表
# ipvsadm -Ln

LVS-Backup

yum -y install keepalived ipvsadm

scp root@192.168.189.172:/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf

vim /etc/keepalived/keepalived.conf

修改如下参数
state BACKUP
priority 90

systemctl start keepalived

systemctl enable keepalived

测试
1.查看VIP是否生成
# ip a
没有VIP是正确的
2.查看lvs的调度表
# ipvsadm -Ln
有调度表是正确的

RS1

yum -y install httpd

systemctl start httpd

systemctl enable httpd

echo 1111111111111111 > /var/www/html/index.html

配置VIP

cd /etc/sysconfig/network-scripts/

cp ifcfg-lo ifcfg-lo:0

vim ifcfg-lo:0

DEVICE=lo:0
IPADDR=192.168.189.181
NETMASK=255.255.255.255
ONBOOT=yes

ifup lo:0

ARP级别
echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce

静态路由