一、环境准备
架构设计
环境配置
硬件配置
操作系统：centos-7.8 cpu：1*1 硬盘：20G 内存：2G
网络配置
| role | host | ip | getway | OS |
|---|---|---|---|---|
| Client | node05 | 192.168.5.5 | WAN网出口 | Centos-7.8 |
| Director-Server | node01 | 192.168.5.4、172.24.8.100 | WAN网出口 | Centos-7.8 |
| Web1 | node02 | 172.24.8.11 | 172.24.8.100 | Centos-7.8 |
| Web2 | node03 | 172.24.8.12 | 172.24.8.100 | Centos-7.8 |
| Web3 | node04 | 172.24.8.13 | 172.24.8.100 | Centos-7.8 |
二、案例实战
配置时间同步
服务端：# vim /etc/chrony.conf
server 172.24.8.100 iburst
allow 172.24.8.0/24
local stratum 10
启动：# systemctl restart chronyd
客户端：
server 172.24.8.100 iburst
启动：# systemctl restart chronyd
[root@node01 ~]# date
Fri Feb 19 15:05:53 CST 2021
[root@node02 ~]# date
Fri Feb 19 15:05:53 CST 2021
[root@node03 ~]# date
Fri Feb 19 15:05:53 CST 2021
[root@node04 ~]# date
Fri Feb 19 15:05:53 CST 2021
负载调度开启路由转发
# 临时开启
--- 方法一
[root@node01 ~]# echo 1 > /proc/sys/net/ipv4/ip_forward
--- 方法二
[root@node01 ~]# sysctl -w net.ipv4.ip_forward=1
net.ipv4.ip_forward = 1
# 永久开启
[root@node01 ~]# echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
[root@node01 ~]# sysctl -p
net.ipv4.ip_forward = 1
RS 节点部署nginx服务
# 以Web1为例演示
[root@node02 ~]# ll nginx-1.10.0-1.el7.ngx.x86_64.rpm
-rw-r--r--. 1 root root 655648 Feb 19 15:41 nginx-1.10.0-1.el7.ngx.x86_64.rpm
[root@node02 ~]# yum install nginx-1.10.0-1.el7.ngx.x86_64.rpm -y
[root@node02 ~]# cd /usr/share/nginx/html/
[root@node02 html]# mv index.html{,.bak}
[root@node02 html]# echo web1 test page > index.html
[root@node02 html]# systemctl enable --now nginx
Created symlink from /etc/systemd/system/multi-user.target.wants/nginx.service to /usr/lib/systemd/system/nginx.service.
[root@node02 html]# netstat -lnutp | grep 80
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 12220/nginx: master
Director-Server 配置 LVS-DR
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ipvsadm 主要选项
>--add-service -A add virtual service with options
>--edit-service -E edit virtual service with options
>--delete-service -D delete virtual service
>--clear -C clear the whole table
>--restore -R restore rules from stdin
>--save -S save rules to stdout
>--add-server -a add real server with options
>--edit-server -e edit real server with options
>--delete-server -d delete real server
>--list -L|-l list the table
>--tcp-service -t service-address service-address is host[:port]
>--udp-service -u service-address service-address is host[:port]
>--gatewaying -g gatewaying (direct routing) (default)
>--ipip -i ipip encapsulation (tunneling)
>--masquerading -m masquerading (NAT)
>--weight -w weight capacity of real server
# 安装ipvsadm
[root@node01 ~]# yum install ipvsadm -y
# 查看集群节点空
[root@node01 ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
# 添加集群
[root@node01 ~]# ipvsadm -A -t 192.168.5.4:80 -s rr
[root@node01 ~]# ipvsadm -a -t 192.168.5.4:80 -r 172.24.8.11:80 -m
[root@node01 ~]# ipvsadm -a -t 192.168.5.4:80 -r 172.24.8.12:80 -m
[root@node01 ~]# ipvsadm -a -t 192.168.5.4:80 -r 172.24.8.13:80 -m
# 查看集群节点
[root@node01 ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.5.4:80 rr
-> 172.24.8.11:80 Masq 1 0 0
-> 172.24.8.12:80 Masq 1 0 0
-> 172.24.8.13:80 Masq 1 0 0
三、测试
实现负载均衡！！！
