LVS DR模式的简单应用

1、DR模式下vip不在同一网段上实现过程（跨网段）

 

 #客户端CIP配置

[root@CIP ~]#vim /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
NAME=eth0
BOOTPROTO=static
IPADDR=172.16.17.77
PREFIX=24
GATEWAY=172.16.17.17
ONBOOT=yes

 

#路由配置route

[root@router ~]#cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
NAME=eth0
BOOTPROTO=static
IPADDR=172.16.17.17
PREFIX=24
ONBOOT=yes

[root@router ~]#cat /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
NAME=eth1
BOOTPROTO=static
IPADDR=192.168.16.7
PREFIX=24
ONBOOT=yes
 
[root@router ~]#ip addr add 10.0.0.100/24 dev eth0

#后端RS1,2配置

#RS1的网络配置
[root@rs1 ~]#yum -y install httpd ;systemctl enable --now httpd
[root@rs1 ~]#echo "RS1" > /var/www/html/index.html
[root@rs1 ~]#cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
NAME=eth0
BOOTPROTO=static
IPADDR=192.168.16.17
PREFIX=24
GATEWAY=192.168.16.7
ONBOOT=yes

[root@rs1 ~]#ip addr add 10.0.0.100/24 dev eth0
[root@rs2 ~]#yum -y install httpd ;systemctl enable --now httpd
[root@rs2 ~]#echo "RS2" > /var/www/html/index.html
[root@rs2 ~]#cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
NAME=eth0
BOOTPROTO=static
IPADDR=192.168.16.27
PREFIX=24
GATEWAY=192.168.16.7
ONBOOT=yes
[root@rs2 ~] #ip addr add 10.0.0.100/24 dev eth0

 
#RS1和RS2都进行如下配置
echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce

#LVS配置

[root@lvs ~]#yum -y install httpd ipvsadm ;systemctl enable --now httpd
[root@lvs ~]#echo "LVS " > /var/www/html/index.html
[root@lvs ~]#cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
NAME=eth0
BOOTPROTO=static
IPADDR=192.168.16.8
PREFIX=24
GATEWAY=192.168.16.7
ONBOOT=yes
[root@lvs ~] #ip addr add 10.0.0.100/24 dev eth0

 

#设置规则

[root@LVS ~]#iptables -F && iptables -F -t nat
[root@LVS ~]#ipvsadm -A -t 10.0.0.100:80 -s wrr
[root@LVS ~]#ipvsadm -a -t 10.0.0.100:80 -r 192.168.16.17 -g -w 1
[root@LVS ~]#ipvsadm -a -t 10.0.0.100:80 -r 192.168.16.27-g -w 1

#测试访问

[root@internet ~]#curl 10.0.0.100
RS1

[root@internet ~]#curl 10.0.0.100
RS2

 

2、CentOS7.6 中 nfs 客户端使用 /etc/fatab 实现开机自动挂载

[root@centos7 ~]# vim /etc/fstab 
10.0.0.18:/data/home          /mnt         nfs        netdev,rw       0 0 
#把10.0.0.18上/data/home挂载到本地/mnt上以rw方式,实现开机自动挂载

 

3、CentOS7.6 中 nfs 客户端使用 autofs 实现使用 nfs 时实时挂载

 #服务端安装nfs-utils,并启动nfs-server服务

[root@centos7 ~]# yum -y install nfs-untils;systemctl enable --now nfs-server

#客户端安装autofs，并启动服务，安装nfs-server

[root@centos7 ~]#yum -y install autofs nfs-utils；systemctl enable  --now autofs

 

#NFS服务器创建用户和相应的家目录，将用户家目录共享，安装nfs-utils和auto方式 并启动服务

[root@centos7 ~]#mkdir -pv /data/home
[root@centos7 ~]#useradd -d /data/home/user1 -u 2000 user1
[root@centos7 ~]#vim /etc/exports.d/test.exports
/data/home *(rw)
[root@centos7 ~]#exportfs -r             #生效文件
[root@centos7 ~]#showmount  -e      #查看文件共享

#在第一台NFS客户端主机10.0.0.7上实现相对路径法的autofs

[root@centos7 ~]#useradd -M -u 2000 user1
[root@centos7 ~]#getent   passwd  user1
user1:x:2000：2000::home/user1:/bin/bash
[root@centos7 ~]#vim /etc/auto.master
/home   /etc/auto.home
[root@centos7 ~]#vim /etc/auto.home

*  -fstype=nfs,vers=3 10.0.0.8:/data/home/&
[root@centos7 ~]#systemctl restart autofs
[root@centos7 ~]#su - user1
Last login: Fri Jul  3 16:33:34 CST 2020 on pts/0
[user1@centos7 ~]$pwd
/home/user1
[user1@centos7 ~]$df /home/user1 -T
Filesystem               Type 1K-blocks   Used Available Use% Mounted on

10.0.0.8:/data/home/user1 nfs4  52403200 398464  52004736   1% /home/user1

#注意：home目录下其它用户家目录无法访问

#在第二台NFS客户端主机10.0.0.6上实现绝对路径法的autofs

[root@centos6 ~]#useradd -M -u 2000 user1
[root@centos6 ~]#vim /etc/auto.master
/- /etc/auto.home
[root@centos6 ~]#vim /etc/auto.home
/home/user1  -fstype=nfs,vers=3 nfsserver:/data/home/user1
[root@centos6 ~]#service autofs restart
[root@centos6 ~]#su - user1
[user1@centos6 ~]$pwd
/home/user1
[user1@centos6 ~]$df -T /home/user1
Filesystem                                 Type 1K-blocks   Used Available Use% Mounted on

10.0.0.8:/data/home/user1        nfs   52403200 398464  52004736   1% /home/user1