lvs集群

nat模式

实验条件

除了测试主机，其他三台主机都必要添加或修改网卡，修改如以下显示
lvs主机

server1主机和server2主机

创建实验环境

lvs主机

1. [root@lvs ~]# vmset.sh eth0 172.25.250.100 lvs
2. [root@lvs ~]# vmset.sh eth1 192.168.0.100 lvs
4. ###########eth1仅主机网卡
5. [root@lvs ~]# vim /etc/NetworkManager/system-connections/eth1.nmconnection
6. [root@lvs ~]# cat /etc/NetworkManager/system-connections/eth1.nmconnection
7. [connection]
8. id=eth1
9. type=ethernet
10. interface-name=eth1
12. [ipv4]
13. address1=192.168.0.100/24      
14. method=manual
16. ##########eth0 NAT网卡
17. [root@lvs ~]# cat /etc/NetworkManager/system-connections/eth0.nmconnection
18. [connection]
19. id=eth0
20. type=ethernet
21. interface-name=eth0
23. [ipv4]
24. address1=172.25.250.100/24,172.25.250.2
25. method=manual
28. [root@lvs ~]# nmcli connection reload
29. [root@lvs ~]# nmcli connection up eth0
31. [root@lvs ~]# nmcli connection up eth1
34. ################打开内核路由，使eth1和eth0通信
35. [root@lvs ~]# sysctl -a | grep ip_forward
36. net.ipv4.ip_forward = 0
37. net.ipv4.ip_forward_update_priority = 1
38. net.ipv4.ip_forward_use_pmtu = 0
40. [root@lvs ~]# echo net.ipv4.ip_forward = 1 > /etc/sysctl.conf
41. [root@lvs ~]# sysctl -p     //使其生效
42. net.ipv4.ip_forward = 1

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server1主机

2. [root@server1 ~]# vmset.sh eth0 192.168.0.10 server1
3. [root@server1 ~]# cat /etc/NetworkManager/system-connections/eth0.nmconnection
4. [connection]
5. id=eth0
6. type=ethernet
7. interface-name=eth0
9. [ipv4]
10. address1=192.168.0.10/24,192.168.0.100    //server1主机网关指向lvs主机
11. method=manual
13. [root@server1 ~]# nmcli connection reload
14. [root@server1 ~]# nmcli connection up eth0

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server2主机

1. [root@server2 ~]# vmset.sh eth0 192.168.0.20 server1
2. [root@server2 ~]# cat /etc/NetworkManager/system-connections/eth0.nmconnection
3. [connection]
4. id=eth0
5. type=ethernet
6. interface-name=eth0
8. [ipv4]
9. address1=192.168.0.20/24,192.168.0.100    //server2主机网关指向lvs主机
10. method=manual
12. [root@server2 ~]# nmcli connection reload
13. [root@server2 ~]# nmcli connection up eth0

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开始实验（基于httpd）

lvs主机下载安装ipvsadm

2. [root@lvs ~]# yum install ipvsadm -y
3. [root@lvs ~]# ipvsadm -Ln               //查看策略
4. IP Virtual Server version 1.2.1 (size=4096)
5. Prot LocalAddress:Port Scheduler Flags
6.   -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

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布置策略

1. [root@lvs ~]# ipvsadm -A -t 172.25.250.100:80  -s rr     
2. // -A 添加    // -t 指定TCP协议    //-s 指定算法   rr // 轮寻（你一个我一个....静态）
5. [root@lvs ~]# ipvsadm -a -t 172.25.250.100:80 -r 192.168.0.10:80 -m
6. [root@lvs ~]# ipvsadm -a -t 172.25.250.100:80 -r 192.168.0.20:80 -m
7. [root@lvs ~]# ipvsadm -Ln
8. IP Virtual Server version 1.2.1 (size=4096)
9. Prot LocalAddress:Port Scheduler Flags
10.   -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
11. TCP  172.25.250.100:80 rr
12.   -> 192.168.0.10:80              Masq    1      0          0         
13.   -> 192.168.0.20:80              Masq    1      0          0        

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server1，server2主机

1. [root@server1 ~]# yum install httpd -y  //安装httpd
3. [root@server1 ~]# echo this is server1 > /var/www/html/index.html
5. [root@server2 ~]# echo this is server2 > /var/www/html/index.html

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测试

1. [root@rhel9 ~]# for i in {1..10}
2. > do
3. > curl 172.25.250.100
4. > done
5. this is server1
6. this is server2
7. this is server1
8. this is server2
9. this is server1
10. this is server2
11. this is server1
12. this is server2
13. this is server1
14. this is server2

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DR模式

创建环境

client主机

1. [root@client ~]# vmset.sh 172.25.250.200 client
2. [root@client ~]# cat /etc/NetworkManager/system-connections/eth0.nmconnection
3. [connection]
4. id=eth0
5. type=ethernet
6. interface-name=eth0
8. [ipv4]
9. address1=172.25.250.200/24,172.25.250.100
10. method=manual
11. dns=114.114.114.114;

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router主机

1. [root@router ~]# vmset.sh 172.25.250.100 router
2. [root@router ~]# vmset.sh 192.168.0.100 router
3. [root@router ~]# cat /etc/NetworkManager/system-connections/eth0.nmconnection
4. [connection]
5. id=eth0
6. type=ethernet
7. interface-name=eth0
9. [ipv4]
10. address1=172.25.250.100/24,172.25.250.2
11. method=manual
12. dns=114.114.114.114;
13. [root@router ~]# cat /etc/NetworkManager/system-connections/eth1.nmconnection
14. [connection]
15. id=eth1
16. type=ethernet
17. interface-name=eth1
19. [ipv4]
20. address1=192.168.0.100/24
21. method=manual
22. dns=114.114.114.114;
25. ################打开内核路由，使eth1和eth0通信
26. [root@router ~]# sysctl -a | grep ip_forward
27. net.ipv4.ip_forward = 0
28. net.ipv4.ip_forward_update_priority = 1
29. net.ipv4.ip_forward_use_pmtu = 0
31. [root@router ~]# echo net.ipv4.ip_forward = 1 > /etc/sysctl.conf
32. [root@router ~]# sysctl -p     //使其生效
33. net.ipv4.ip_forward = 1

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lvs主机

1. [root@lvs ~]# nmcli connection delete eth0  //删掉eth0网卡ip，我们用lo环回来做一次性ip
3. [root@lvs ~]# vmset.sh eth1 192.168.0.200 lvs
4. [root@lvs ~]# cat /etc/NetworkManager/system-connections/eth1.nmconnection
5. [connection]
6. id=eth1
7. type=ethernet
8. interface-name=eth1
10. [ipv4]
11. address1=192.168.0.200/24,192.168.0.100           //网关指向路由
12. method=manual
13. dns=114.114.114.114;
15. [root@lvs ~]# ip a a 192.168.0.50/32 dev lo     //环回添加一次性ip

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server1、server2主机

1. #############server1主机
3. [root@server1 ~]#  vmset.sh eth0 192.168.0.10 server1
4. [root@server1 ~]# cat /etc/NetworkManager/system-connections/eth0.nmconnection
5. [connection]
6. id=eth0
7. type=ethernet
8. interface-name=eth0
10. [ipv4]
11. address1=192.168.0.10/24,192.168.0.100    // //网关指向路由
12. method=manual
15. [root@server1 ~]#  echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
16. [root@server1 ~]#  echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
17. [root@server1 ~]#  echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
18. [root@server1 ~]#  echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
20. [root@server1 ~]# ip a a 192.168.0.50/32 dev lo    //临时ip
23. ############server2主机
24. [root@server2 ~]#  vmset.sh eth0 192.168.0.20 server2
26. [root@server2 ~]# cat /etc/NetworkManager/system-connections/eth0.nmconnection
27. [connection]
28. id=eth0
29. type=ethernet
30. interface-name=eth0
32. [ipv4]
33. address1=192.168.0.20/24,192.168.0.100    //网关指向路由
34. method=manual
36. [root@server2 ~]#  echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
37. [root@server2 ~]#  echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
38. [root@server2 ~]#  echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
39. [root@server2 ~]#  echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
41. [root@server2 ~]# ip a a 192.168.0.50/32 dev lo   //临时ip

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开始实验

lvs主机上安装ipvsadm

2. [root@lvs ~]# yum install ipvsadm -y
3. [root@lvs ~]# ipvsadm -Ln               //查看策略
4. IP Virtual Server version 1.2.1 (size=4096)
5. Prot LocalAddress:Port Scheduler Flags
6.   -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

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布置策略

1. [root@lvs ~]# ipvsadm -A -t 192.168.0.50:80 -s wrr  
2. [root@lvs ~]# ipvsadm -a -t 192.168.0.50:80 -r 192.168.0.10:80 -g -w 2  //权重2
3. [root@lvs ~]# ipvsadm -a -t 192.168.0.50:80 -r 192.168.0.20:80 -g -w 1  //权重1
4. [root@lvs ~]# ipvsadm -Ln
5. IP Virtual Server version 1.2.1 (size=4096)
6. Prot LocalAddress:Port Scheduler Flags
7.   -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
8. TCP  192.168.0.50:80 wrr
9.   -> 192.168.0.10:80              Route   2      0          0         
10.   -> 192.168.0.20:80              Route   1      0          0         

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测试

1. [root@client ~]# for i in {1..10}
2. > do
3. > curl 192.168.0.50
4. > done
5. this is server1
6. this is server1
7. this is server2
8. this is server1
9. this is server1
10. this is server2
11. this is server1
12. this is server1
13. this is server2
14. this is server1

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