IPADDR=10.10.10.100
NETMASK=255.255.255.255
NETWORK=127.0.0.0
If you’re having problems with gated making 127.0.0.0/8 a martian,
you can change this to something else (255.255.255.255, for example)
BROADCAST=127.255.255.255
ONBOOT=yes
NAME=loopback
[root@a network-scripts]# systemctl restart network
3、ARP行为控制
[root@a network-scripts]# echo “1” > /proc/sys/net/ipv4/conf/lo/arp_ignore
[root@a network-scripts]# echo “2” > /proc/sys/net/ipv4/conf/lo/arp_announce
[root@a network-scripts]# echo “1” > /proc/sys/net/ipv4/conf/all/arp_ignore
[root@a network-scripts]# echo “2” > /proc/sys/net/ipv4/conf/all/arp_announce
刷新
[root@a network-scripts]# sysctl -p
4、添加路由
[root@a network-scripts]# route add -host 10.10.10.100 dev lo:0
[root@a network-scripts]# echo “route add -host 10.10.10.100 dev lo:0” >> /etc/rc.local
5、关闭防火墙和selinux
[root@a network-scripts]# systemctl stop firewalld
[root@a network-scripts]# systemctl disable firewalld
[root@a network-scripts]# setenforce 0
6、设置LBC
参数说明:
-A:添加集群
-a:集群子节点
-t:tcp协议
-s:算法
-r:真实服务器
-g:DR模式
[root@a ~]# ipvsadm -A -t 10.10.10.100:80 -s rr
[root@a ~]# ipvsadm -a -t 10.10.10.100:80 -r 10.10.10.12:80 -g
[root@a ~]# ipvsadm -a -t 10.10.10.100:80 -r 10.10.10.13:80 -g
[root@a ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 10.10.10.100:80 rr
-> 10.10.10.12:80 Route 1 0 0
-> 10.10.10.13:80 Route 1 0 0
[root@a ~]# ipvsadm --save > /etc/sysconfig/ipvsadm
[root@a ~]# systemctl start ipvsadm.service
[root@a ~]# systemctl enable ipvsadm.service
7、测试
lvs会把请求按rr算法分给rs
[root@a network-scripts]# ipvsadm -Ln --stats
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Conns InPkts OutPkts InBytes OutBytes
-> RemoteAddress:Port
TCP 10.10.10.100:80 24 164 0 24880 0
-> 10.10.10.12:80 12 94 0 16209 0
-> 10.10.10.13:80 12 70 0 8671 0
(2)部署keepalived
在lvs上配置和一台新的虚拟机上配置
[root@a ~]# cd /etc/sysconfig/network-scripts/
[root@a ~]# scp ./ifcfg-ens32:0 10.10.10.14:/etc/sysconfig/network-scripts/ifcfg-ens32:0
[root@a ~]# yum install -y keepalived
#配置keepalived配置文件
[root@a ~]# cat /etc/keepalived/keepalived.conf|head -50
! Configuration File for keepalived
global_defs {
router_id R1
}
vrrp_instance VI_1 {
state MASTER
interface ens32
virtual_router_id 66
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.10.10.100
}
}
virtual_server 10.10.10.100 80 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 10.10.10.12 80 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 10.10.10.13 80 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
从节点配置基本一致,
修改以下配置
router_id R2
state SLAVE
priority 20
在从节点安装ipvsadm
[root@a 《一线大厂Java面试题解析+后端开发学习笔记+最新架构讲解视频+实战项目源码讲义》无偿开源 威信搜索公众号【编程进阶路】 network-scripts]# yum install -y ipvsadm
[root@a network-scripts]# ipvsadm -l
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
第一次查看没有集群信息,重启keepalived服务后会发现集群信息已经同步在两个节点
[root@a network-scripts]# systemctl restart keepalived
[root@a network-scripts]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 10.10.10.100:80 rr persistent 50
-> 10.10.10.12:80 Route 1 0 0
-> 10.10.10.13:80 Route 1 0 0