LVS基本配置_lvs配置

 

lvs：

NAT:    特点：相当于client和server的网关

client： 192.168.10.10     gw 192.168.10.1

lvs（两张网卡）：ip1  192.168.10.1  =client gw   

 ip2  192.168.2.1=web的网关   网关     只有两个ip

web1    192.168.2.60     gw 192.168.2.1

web2    192.168.2.70    gw  192.168.2.1

web1

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

[root@localhost ~]# echo 1111 > /var/www/html/index.html

[root@localhost ~]# systemctl restart httpd

[root@localhost ~]# curl 192.168.2.60

1111

web2

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

[root@localhost ~]# echo 2222 > /var/www/html/index.html

[root@localhost ~]# systemctl restart httpd

[root@localhost ~]# curl 192.168.2.70

2222

lvs

[root@localhost ~]# vim /etc/sysctl.conf

net.ipv4.ip_forward = 1

[root@localhost ~]# sysctl -p

net.ipv4.ip_forward = 1

[root@localhost ~]# modprobe ip_vs  #加载lvs的模块

[root@localhost ~]# yum -y install ipvsadm   #lvs的管理工具

[root@localhost ~]# ipvsadm -A -t 192.168.10.1:80 -s rr   

-A   添加一个新的集群

 -t 192.168.10.1:80    使用tcp协议  后面加指定的ip   ip使用的是和客户端同网段的ip

-s rr   调度算法    rr轮询7

[root@localhost ~]# ipvsadm -a -t 192.168.10.1:80 -r 192.168.2.60 -m -w 1

-a  添加真实的节点    -t 192.168.10.1:80   给集群中添加

-r   真实节点的ip    192.168.2.60  web主机的ip

-m    使用nat模式    -g  使用dr模式   -i  ip隧道模式    -w 权重

[root@localhost ~]# ipvsadm -a -t 192.168.10.1:80 -r 192.168.2.70 -m -w 1

[root@localhost ~]# ipvsadm -S

[root@localhost ~]# ipvsadm -ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  192.168.10.1:80 rr

  -> 192.168.2.60:80              Masq    1      0          0         

  -> 192.168.2.70:80              Masq    1      0   

client：

访问lvs

[root@localhost ~]# curl 192.168.10.1

2222

[root@localhost ~]# curl 192.168.10.1

1111

删除：

删除真实节点

[root@localhost ~]# ipvsadm -d -t 192.168.10.1:80 -r 192.168.2.60

删除集群      

[root@localhost ~]# ipvsadm -D -t 192.168.10.1:80

DR模式  特点：需要让lvs后端真实节点处于同一个物理网络内

客户端   

client      192.168.2.10

lvs          192.168.2.20     2.1--2.20 虚拟ip   192.168.2.100

web1     192.168.2.60                     虚拟ip   192.168.2.100

web2     192.168.2.70                     虚拟ip   192.168.2.100

lvs配置虚拟ip

[root@localhost ~]# cd /etc/sysconfig/network-scripts/

[root@localhost network-scripts]# cp ifcfg-ens37 ifcfg-ens37:0

[root@localhost network-scripts]# vim ifcfg-ens37:0

NAME=ens37:0

DEVICE=ens37:0

ONBOOT=yes

IPADDR=192.168.2.100

PREFIX=24

GATEWAY=192.168.2.1

[root@localhost network-scripts]# systemctl restart network

[root@localhost network-scripts]#  ip  a

192.168.2.20/24

192.168.2.100/24

web1和web2：

[root@localhost ~]# cd /etc/sysconfig/network-scripts/

[root@localhost network-scripts]# ls

ifcfg-ens33    ifdown-Team      ifup-post

ifcfg-lo

[root@localhost network-scripts]# cp ifcfg-lo ifcfg-lo:0

[root@localhost network-scripts]# vim ifcfg-lo:0

DEVICE=lo:0

IPADDR=192.168.2.100

NETMASK=255.255.255.255

[root@localhost network-scripts]# ip a

 lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

       valid_lft forever preferred_lft forever

    inet 192.168.2.100/32

web1

[root@localhost ~]# vim /etc/sysctl.conf

net.ipv4.conf.lo.arp_ignore = 1   #不接受任何用户的请求

net.ipv4.conf.all.arp_ignore =1

net.ipv4.conf.default.arp_ignore = 1

net.ipv4.conf.lo.arp_announce = 2   #不响应任何用户

net.ipv4.conf.all.arp_announce = 2

net.ipv4.conf.default.arp_announce = 2

[root@localhost ~]# sysctl -p

远程拷贝

[root@localhost ~]# scp /etc/sysctl.conf root@192.168.2.70:/etc/sysctl.conf

yes   拷贝主机的密码

web2

[root@localhost network-scripts]# sysctl -p

两台主机：

添加路由  让web可以接受来自192.168.2.100的请求和使用192.168.2.100发送响应

[root@localhost ~]# route add -host 192.168.2.100 dev lo:0

lvs   DR模式

先删除nat模式

[root@localhost ~]# ipvsadm -D -t 192.168.10.1:80

[root@localhost ~]# ipvsadm -A -t 192.168.2.100:80 -s rr

[root@localhost ~]# ipvsadm -a -t 192.168.2.100:80 -r 192.168.2.60:80 -g -w 1

[root@localhost ~]# ipvsadm -a -t 192.168.2.100:80 -r 192.168.2.70:80 -g -w 1

[root@localhost ~]# ipvsadm -S

[root@localhost ~]# ipvsadm -ln

client：

[root@localhost ~]# curl 192.168.2.100

2222

[root@localhost ~]# curl 192.168.2.100

1111