Linux - LVS - DR 多网段

2021-12-15 11:05:03

　　在上个实验的基础上，给路由，LVS，RS1，RS2 添加172.0.0.0/24网段

1> 路由器

[23:09:10 root@centos8 ~]#ip a
1: 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
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:18:c0:18 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.19/24 brd 10.0.0.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
    inet 172.16.0.200/24 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe18:c018/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:18:c0:22 brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.50/24 brd 192.168.10.255 scope global noprefixroute eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe18:c022/64 scope link 
       valid_lft forever preferred_lft forever

2> LVS主机

[23:09:27 root@centos8 ~]#ip a  a 172.16.0.100/24 dev eth0
[23:10:05 root@centos8 ~]#ip a
1: 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
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:eb:1f:a3 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.16/24 brd 10.0.0.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
    inet 172.16.0.100/24 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:feeb:1fa3/64 scope link 
       valid_lft forever preferred_lft forever

3> RS1，RS2

[23:09:35 root@centos8 ~]#ip a  a 172.16.0.100/24 dev eth0
[23:10:14 root@centos8 ~]#ip a
1: 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
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:e7:af:e9 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.17/24 brd 10.0.0.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
    inet 172.16.0.100/24 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fee7:afe9/64 scope link 
       valid_lft forever preferred_lft forever

[23:09:37 root@centos8 ~]#ip a  a 172.16.0.100/24 dev eth0
[23:10:19 root@centos8 ~]#ip a
1: 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
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:8b:5c:39 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.18/24 brd 10.0.0.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
    inet 172.16.0.100/24 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe8b:5c39/64 scope link 
       valid_lft forever preferred_lft forever

LVS规则

[22:58:19 root@centos8 ~]#ipvsadm -A -t 172.16.0.100:80 -s rr
[23:01:59 root@centos8 ~]#ipvsadm -a -t 172.16.0.100:80 -r 10.0.0.17:80 -g
[23:02:34 root@centos8 ~]#ipvsadm -a -t 172.16.0.100:80 -r 10.0.0.18:80 -g
[23:02:38 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  172.16.0.100:80 rr
  -> 10.0.0.17:80                 Route   1      0          0         
  -> 10.0.0.18:80                 Route   1      0          0

测试

[23:10:51 root@centos8 ~]#while :;do curl 172.16.0.100;sleep 1;done
17.noise.org 10.0.0.17
18.noise.org 10.0.0.18
17.noise.org 10.0.0.17
18.noise.org 10.0.0.18
17.noise.org 10.0.0.17
18.noise.org 10.0.0.18
17.noise.org 10.0.0.17
18.noise.org 10.0.0.18

持久保存和重新reload规则
[23:10:07 root@centos8 ~]#ipvsadm-save > /data/ipvsadm-rule1
[23:15:41 root@centos8 ~]#cat /data/ipvsadm-rule1
-A -t centos8.3:http -s rr
-a -t centos8.3:http -r 10.0.0.17:http -g -w 1
-a -t centos8.3:http -r 10.0.0.18:http -g -w 1
[23:15:55 root@centos8 ~]#ipvsadm-restore < /data/ipvsadm-rule1
[23:15:59 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  10.0.0.16:80 rr
  -> 10.0.0.17:80                 Route   1      0          0         
  -> 10.0.0.18:80                 Route   1      0          0

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