LVS负载均衡群集——实战篇

LVS负载均衡群集

环境准备:

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CentOS 7-1:调度器,网关(需要两块网卡)外:12.0.0.1 内:192.168.200.1

CentOS 7-2:网站服务器(Apache)192.168.200.110

CentOS 7-3:网站服务器(Apache)192.168.200.120

CentOS 7-4:提供共享存储 192.168.200.130

win7-1:客户端 12.0.0.12

yum在线安装前置操作:

1.共享存储服务器CentOS 7-4的操作:

[root@localhost ~]# rpm -q nfs-utils
nfs-utils-1.3.0-0.48.el7.x86_64
[root@localhost ~]# rpm -q rpcbind 
rpcbind-0.2.0-42.el7.x86_64

2.节点服务器CentOS 7-2和7-3两台节点服务器:

[root@localhost ~]# yum install httpd -y

3.调度器网关CentOS 7-1操作:

//要先添加一个网络适配器,成为两个网卡
[root@localhost ~]# yum install ipvsadm -y

共享存储服务器CentOS 7-4:

//先将网卡更改为仅主机模式
[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33
BOOTPROTO="static"      //将dhcp改为static
DEVICE="ens33"
ONBOOT="yes"
IPADDR=192.168.200.130      //在末行下插入:IP,子网,网关
NETMASK=255.255.255.0
GATEWAY=192.168.200.1
修改完成后输入:wq保存退出
[root@localhost ~]# service network restart 
Restarting network (via systemctl):                        [  确定  ]
[root@localhost ~]# systemctl stop firewalld.service 
[root@localhost ~]# setenforce 0
[root@localhost ~]# systemctl start nfs.service
[root@localhost ~]# systemctl status nfs.service
● nfs-server.service - NFS server and services
   Loaded: loaded (/usr/lib/systemd/system/nfs-server.service; disabled; vendor preset: disabled)
   Active: active (exited) since 二 2019-11-26 17:42:05 CST; 11s ago
......省略多行,状态为Active说明正常
[root@localhost ~]# systemctl start rpcbind.service
[root@localhost ~]# systemctl status rpcbind.service
● rpcbind.service - RPC bind service
   Loaded: loaded (/usr/lib/systemd/system/rpcbind.service; indirect; vendor preset: enabled)
   Active: active (running) since 二 2019-11-26 17:40:23 CST; 4min 26s ago
......省略多行,状态为Active说明正常
[root@localhost ~]# vim /etc/exports
/usr/share *(ro,sync)
/opt/accp 192.168.200.0/24(rw,sync)
/opt/benet 192.168.200.0/24(rw,sync)
//加入以上内容之后输入:wq保存退出
[root@localhost ~]# cd /opt/
[root@localhost opt]# mkdir benet accp
[root@localhost opt]# chmod 777 accp/ benet/        //提升权限
[root@localhost opt]# exportfs -rv      //进行发布
exporting 192.168.200.0/24:/opt/benet
exporting 192.168.200.0/24:/opt/accp
exporting *:/usr/share

节点服务器(CentOS 7-2)上的操作:

[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33
BOOTPROTO="static"      //将dhcp改为static
DEVICE="ens33"
ONBOOT="yes"
IPADDR=192.168.200.110      //在末行下插入:IP,子网,网关
NETMASK=255.255.255.0
GATEWAY=192.168.200.1
修改完成后输入:wq保存退出
[root@localhost ~]# service network restart 
Restarting network (via systemctl):                        [  确定  ]
[root@localhost ~]# systemctl stop firewalld.service 
[root@localhost ~]# setenforce 0
[root@localhost ~]# systemctl start httpd.service
[root@localhost ~]# netstat -ntap | grep 80 
tcp6       0      0 :::80               :::*            LISTEN          7315/httpd          
//设置网络适配器为仅主机
[root@localhost ~]# ping 192.168.200.130
PING 192.168.200.130 (192.168.200.130) 56(84) bytes of data.
64 bytes from 192.168.200.130: icmp_seq=1 ttl=64 time=0.754 ms
64 bytes from 192.168.200.130: icmp_seq=2 ttl=64 time=0.368 ms
64 bytes from 192.168.200.130: icmp_seq=3 ttl=64 time=0.398 ms
[root@localhost ~]# showmount -e 192.168.200.130
Export list for 192.168.200.130:
/usr/share *
/opt/benet 192.168.200.0/24
/opt/accp  192.168.200.0/24
[root@localhost ~]# mount.nfs 192.168.200.130:/opt/accp /var/www/html/       //挂载
[root@localhost ~]# cd /var/www/html/
[root@localhost html]# echo "this is accp web" > index.html       //写首页内容

此时回到存储服务器CentOS 7-4上看是否有此文件:

[root@localhost ~]# cd /opt/
[root@localhost opt]# ls
accp  benet  rh
[root@localhost opt]# cd accp/
[root@localhost accp]# ls
index.html
[root@localhost accp]# cat index.html 
this is accp web
//此时有我们新建的index.html文件

此时,在CentOS 7-2节点服务器上使用火狐浏览器输入:127.0.0.1看是否可以显示我们写入的网页内容:

LVS负载均衡群集——实战篇

节点服务器(CentOS 7-3)上的操作:

[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33
BOOTPROTO="static"      //将dhcp改为static
DEVICE="ens33"
ONBOOT="yes"
IPADDR=192.168.200.120      //在末行下插入:IP,子网,网关
NETMASK=255.255.255.0
GATEWAY=192.168.200.1
//修改完成后输入:wq保存退出
[root@localhost ~]# service network restart 
Restarting network (via systemctl):                        [  确定  ]
[root@localhost ~]# systemctl stop firewalld.service 
[root@localhost ~]# setenforce 0
[root@localhost ~]# systemctl start httpd.service
[root@localhost ~]# netstat -ntap | grep 80 
tcp6       0      0 :::80               :::*            LISTEN          7315/httpd   //设置网络适配器为仅主机
[root@localhost ~]# ping 192.168.200.130
PING 192.168.200.130 (192.168.200.130) 56(84) bytes of data.
64 bytes from 192.168.200.130: icmp_seq=1 ttl=64 time=0.532 ms
64 bytes from 192.168.200.130: icmp_seq=2 ttl=64 time=1.01 ms
64 bytes from 192.168.200.130: icmp_seq=3 ttl=64 time=0.940 ms
[root@localhost ~]# showmount -e 192.168.200.130
Export list for 192.168.200.130:
/usr/share *
/opt/benet 192.168.200.0/24
/opt/accp  192.168.200.0/24
[root@localhost ~]# mount.nfs 192.168.200.130:/opt/benet /var/www/html/
[root@localhost ~]# cd /var/www/html/
[root@localhost html]# echo "this is benet web" > index.html

此时回到存储服务器CentOS 7-4上看是否有此文件:

[root@localhost ~]# cd /opt/
[root@localhost opt]# ls
accp  benet  rh
[root@localhost opt]# cd accp/
[root@localhost accp]# ls
index.html
[root@localhost accp]# cat index.html 
this is benet web
//此时有我们新建的index.html文件
验证:在CentOS 7-3节点服务器上使用火狐浏览器输入:127.0.0.1看是否可以显示我们写入的网页内容

LVS负载均衡群集——实战篇

调度,网关服务器CentOS 7-1的操作:

[root@localhost ~]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# cp ifcfg-ens33 ifcfg-ens36
[root@localhost network-scripts]# vim ifcfg-ens36
BOOTPROTO="static"      //将dhcp改为static
NAME="ens36"        //把名称改为ens36
UUID号删除
DEVICE="ens36"      //把名称改为ens36
ONBOOT="yes"
IPADDR=12.0.0.1     //在末行下插入:IP,子网
NETMASK=255.255.255.0
//修改完成后输入:wq保存退出
[root@localhost network-scripts]# vim ifcfg-ens33
BOOTPROTO="static"      //将dhcp改为static
DEVICE="ens33"
ONBOOT="yes"        //在末行下插入:IP,子网
IPADDR=192.168.200.1
NETMASK=255.255.255.0
//修改完成后输入:wq保存退出
[root@localhost network-scripts]# service network restart 
Restarting network (via systemctl):                        [  确定  ]
[root@localhost network-scripts]# vim /etc/sysctl.conf 
//在最后一行按o转下行插入
net.ipv4.ip_forward=1
//修改完成后输入:wq保存退出
[root@localhost network-scripts]# sysctl -p
net.ipv4.ip_forward = 1
[root@localhost network-scripts]# iptables -t nat -F
[root@localhost network-scripts]# iptables -F
[root@localhost network-scripts]# iptables -t nat -A POSTROUTING -o ens36 -s 192.168.200.0/24 -j SNAT --to-source 12.0.0.1
win7-1中验证转发:
先把网卡设置为仅主机模式,网卡配置为静态地址,同时关闭防火墙:

LVS负载均衡群集——实战篇

加载LVS内核模块:
[root@localhost network-scripts]# modprobe ip_vs
[root@localhost network-scripts]# cat /proc/net/ip_vs
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port Forward Weight ActiveConn InActConn
启动服务:(注意:在CentOS 7中必须要先保存在启动服务,否则会报错!!!)
[root@localhost network-scripts]# ipvsadm --save > /etc/sysconfig/ipvsadm
[root@localhost network-scripts]# systemctl start ipvsadm.service 
编写配置规则:
[root@localhost network-scripts]# cd /opt/
[root@localhost opt]# vim nat.sh
#!/bin/bash
ipvsadm -C          //清除内核虚拟服务器表中的所有记录
ipvsadm -A -t 12.0.0.1:80 -s rr         //添加新的虚拟的服务器
ipvsadm -a -t 12.0.0.1:80 -r 192.168.200.110:80 -m
ipvsadm -a -t 12.0.0.1:80 -r 192.168.200.120:80 -m
ipvsadm
//输入完成后输入:wq保存退出
[root@localhost opt]# source nat.sh
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  localhost.localdomain:http rr
  -> 129.168.200.110:http         Masq    1      0          0         
  -> 129.168.200.120:http         Masq    1      0          0       
验证:使用win7-1客户终端访问12.0.0.1,看是否可以成功:

LVS负载均衡群集——实战篇

此时可以访问,说明LVS负载均衡群集成功提供服务,试验成功!


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