1、DR模式下vip不在同一网段上实现过程（跨网段）
#CIP配置
[root@centos8 ~]#cat/etc/sysconfig/network-scripts/ifcfg-eth0
# Generated by dracut initrd
NAME="eth0"DEVICE="eth0"ONBOOT=yes
NETBOOT=yes
BOOTPROTO=static
IPADDR=172.16.17.77REFIX=24GATEWAY=172.16.17.17TYPE=Ethernet
#ROUTER配置
[root@centos8 ~]#cat/etc/sysconfig/network-scripts/ifcfg-eth0
# Generated by dracut initrd
NAME="eth0"DEVICE="eth0"ONBOOT=yes
NETBOOT=yes
BOOTPROTO=static
IPADDR=172.16.17.17PREFIX=24TYPE=Ethernet
[root@centos8 ~]#cat/etc/sysconfig/network-scripts/ifcfg-eth1
# Generated by dracut initrd
NAME="eth1"DEVICE="eth1"ONBOOT=yes
NETBOOT=yes
BOOTPROTO=static
IPADDR=192.168.16.7PREFIX=24TYPE=Ethernet
[root@centos8 ~]#echo'net.ipv4.ip_forward=1'>> /etc/sysctl.conf
[root@centos8 ~]#sysctl -p
net.ipv4.ip_forward =1#RS1配置
[root@centos7 ~]#yum-yinstall httpd
[root@centos7 ~]#cat/etc/sysconfig/network-scripts/ifcfg-eth0
# Generated by dracut initrd
NAME="eth0"DEVICE="eth0"ONBOOT=yes
NETBOOT=yes
BOOTPROTO=static
IPADDR=192.168.16.17PREFIX=24GATEWAY=192.168.16.7TYPE=Ethernet
[root@centos7 ~]#ip a a10.0.0.100/32dev lo label lo:1[root@centos7 ~]#echo'192.168.16.17 RS1'> /var/www/html/index.html
[root@centos7 ~]#systemctl enable --now httpd.service
Created symlink from /etc/systemd/system/multi-user.target.wants/httpd.service to /usr/lib/systemd/system/httpd.service.
[root@centos7 ~]#curl192.168.16.17192.168.16.17 RS1
[root@centos7 ~]#echo1> /proc/sys/net/ipv4/conf/all/arp_ignore
[root@centos7 ~]#echo2> /proc/sys/net/ipv4/conf/lo/arp_announce
[root@centos7 ~]#echo2> /proc/sys/net/ipv4/conf/all/arp_announce
[root@centos7 ~]#echo1> /proc/sys/net/ipv4/conf/lo/arp_ignore
#RS2配置
[root@centos7 ~]#yum-yinstall httpd
[root@centos7 ~]#cat/etc/sysconfig/network-scripts/ifcfg-eth0
# Generated by dracut initrd
NAME="eth0"DEVICE="eth0"ONBOOT=yes
NETBOOT=yes
BOOTPROTO=static
IPADDR=192.168.16.27PREFIX=24GATEWAY=192.168.16.7TYPE=Ethernet
[root@centos7 ~]#ip a a10.0.0.100/32dev lo label lo:1[root@centos7 ~]#echo'192.168.16.27 RS2'> /var/www/html/index.html
[root@centos7 ~]#systemctl enable --now httpd.service
Created symlink from /etc/systemd/system/multi-user.target.wants/httpd.service to /usr/lib/systemd/system/httpd.service.
[root@centos7 ~]#curl192.168.16.27192.168.16.27 RS2
[root@centos7 ~]#echo1> /proc/sys/net/ipv4/conf/all/arp_ignore
[root@centos7 ~]#echo1> /proc/sys/net/ipv4/conf/lo/arp_ignore
[root@centos7 ~]#echo2> /proc/sys/net/ipv4/conf/all/arp_announce
[root@centos7 ~]#echo2> /proc/sys/net/ipv4/conf/lo/arp_announce
#LVS主机的配置
[root@centos8 ~]#ip a a10.0.0.100/32dev lo label lo:1[root@centos8 ~]#ipvsadm -A -t10.0.0.100:80-s rr
[root@centos8 ~]#ipvsadm -a -t10.0.0.100:80-r192.168.16.17:80-g
[root@centos8 ~]#ipvsadm -a -t10.0.0.100:80-r192.168.16.27:80-g
[root@centos8 ~]#ipvsadm -Ln
IP Virtual Server version 1.2.1(size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 10.0.0.100:80 rr
->192.168.16.17:80Route100->192.168.16.27:80Route100#测试访问
[root@centos8 ~]#curl10.0.0.100192.168.16.27 RS2
[root@centos8 ~]#curl10.0.0.100192.168.16.17RS1
2、CentOS7.6 中 nfs 客户端使用 /etc/fatab 实现开机自动挂载
#nfs服务器端配置
[root@nfs ~]#yum-yinstallnfs-utils rpcbind
[root@nfs ~]#mkdir/data/wwwbase
[root@nfs ~]#cat/etc/exports.d/www.exports/data/wwwbase10.0.0.18(rw)
[root@nfs ~]#systemctl enable --now nfs-server.service
Created symlink /etc/systemd/system/multi-user.target.wants/nfs-server.service → /usr/lib/systemd/system/nfs-server.service.
#nfs客户端配置
[root@www ~]#yum-yinstallnfs-utils
[root@www ~]#mkdir/data/www
[root@www ~]#cat/etc/fstab
#
# /etc/fstab
# Created by anaconda on Wed Sep 1621:14:322020#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See manpages fstab(5), findfs(8),mount(8) and/or blkid(8)formoreinfo.
#
# After editing this file, run'systemctl daemon-reload' to update systemd
# units generated from this file.
#
UUID=f67120cf-bcf2-4493-ae9f-742b6e5c4f75 / xfs defaults00UUID=2de3d35e-5cdc-4491-947b-92cb73b37724 /boot ext4 defaults12UUID=5d09360a-5d62-4092-8413-229e25d5e209 /data xfs defaults00UUID=4f11cf07-d2a6-4f16-bada-5627efccdfb3 swap swap defaults0010.0.0.8:/data/wwwbase /data/www nfs defaults,_netdev00[root@www ~]#mount-a
[root@www ~]#df-h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 888M 0888M0% /dev
tmpfs 904M 0904M0% /dev/shm
tmpfs 904M 8.7M895M1% /run
tmpfs 904M 0904M0% /sys/fs/cgroup/dev/sda2 100G2.1G 98G3% //dev/sda3 50G 390M 50G1% /data/dev/sda1 976M 128M 781M15% /boot
tmpfs 181M 0181M0% /run/user/010.0.0.8:/data/wwwbase 50G 390M 50G1% /data/www
3、CentOS7.6 中 nfs 客户端使用 autofs 实现使用 nfs 时实时挂载
#nfs服务器端配置
[root@nfs ~]#yum-yinstallnfs-utils rpcbind
[root@nfs ~]#mkdir-pv /data/home
[root@nfs ~]#useradd -d /data/home/user1 -u2000 user1
[root@nfs ~]#cat/etc/exports.d/test.exports/data/home10.0.0.18(rw)
[root@nfs ~]#systemctl enable --now nfs-server.service
Created symlink /etc/systemd/system/multi-user.target.wants/nfs-server.service → /usr/lib/systemd/system/nfs-server.service.
#autofs端配置
[root@www ~]#yum-yinstallnfs-utils autofs
[root@www ~]#useradd -M -u2000 user1
[root@www ~]#cat/etc/auto.master/- /etc/auto.home
[root@www ~]#cat/etc/auto.home/home/user1 -fstype=nfs,vers=3nfsserver:/data/home/user1
[root@www ~]#systemctl start autofs
[root@www ~]#su- user1
Last login: Sun Nov803:52:36CST2020on pts/0[user1@www user1]$pwd/home/user1