运维高级内容--lvs按权重值轮询调度

创建5台主机(一些配置是基于实验一的基础)：

• 客户端client 172.25.254.200
• 路由器route 172.25.254.100 192.168.0.100 （需要eth0、eth1两个网关）
• LVS 192.168.0.50
• webserver1 192.168.0.10
• webserver2 192.168.0.20

1.LVS主机：

vim /etc/NetworkManager/system-connection/eth1.nmconnection

[connection]
id=eth1
type=ethernet
interface-name=eth1[ipv4]
address1=192.168.0.50/24.192.168.0.100
method=manual

nmcli connection reload

nmcli connection up eth1

(如果主机有多余网卡记得清空，只留eth1)

ip a a 192.168.0.200/32 dev lo #在lvs中添加vip,为本地回环接口（lo）添加一个 IPv4 地址 192.168.0.200 ，子网掩码为 255.255.255.255

ipvsadm -Ln

ipvsadm -A -t 192.168.0.200:80 -s wrr #w :权重 ；权重值等于多少轮询调度的时候就调度几次才调度下一个

ipvsadm -a -t 192.168.0.200:80 -r 192.168.0.10:80 -g -w 1 #轮询调度一次就调度192.168.0.20

ipvsadm -a -t 192.168.0.200:80 -r 192.168.0.20:80 -g -w 2 #轮询调度两次才停止或调度下一个

2.路由器route :

vim /etc/NetworkManager/system-connections/eth0.nmconnection #NAT模式的eth0

[connection]
id=eth0
type=ethernet
interface-name=eth0[ipv4]
address1=172.25.254.100/24,172.25.254.2
method=manual
dns=114.114.114.114;

vim /etc/NetworkManager/system-connections/eth1.nmconnection #仅主机模式的eth1

[connection]
id=eth1
type=ethernet
interface-name=eth1[ipv4]
address1=192.168.0.100/24
method=manual

nmcli connection reload

nmcli connection up eth0

nmcli connection up eth1

sysctl -a | grep ip_forward #配置内核

vim /etc/sysctl.conf

net.ipv4.ip_forward=1 #添加这一行并将值改为1，保存退出

sysctl -p

3.RS--webserver1 :

实验一配好网关、IP等基础上：

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

#使vip不对外响应

ip a a 192.168.0.200/32 dev lo #添加vip

4.RS--webserver2 :

实验一配好网关、IP等基础上：

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

#使vip不对外响应

ip a a 192.168.0.200/32 dev lo #添加vip

5.客户端client :

vim /etc/NetworkManager/system-connections/eth0.nmconnection #NAT模式的eth0

[connection]
id=eth0
type=ethernet
interface-name=eth0[ipv4]
address1=172.25.254.200/24,172.25.254.2
method=manual

nmcli connection reload

nmcli connection up eth0

结果测试：

for i in {1..10} #省略号只能有两点 ..

do

curl 192.168.0.200

done

测试结果：按权重值轮询10遍