ipvs-vagrant

this is a test ipvs(NAT) Vagrantfile.

vm

vm	role	ip
lb0	LVS director	192.168.66.11(DIP)、192.168.55.11（external interface)
lb1	LVS director	192.168.66.12(DIP)、192.168.55.12（external interface)
-	VIP	192.168.55.100
rs0	RealServer	192.168.66.111(RIP)
rs1	RealServer	192.168.66.112(RIP)
cl0	Client	192.168.55.200

start

vagrant up lb0 lb1 && vagrant reload lb0 lb1

vagrant up rs0 rs1

vagrant up cl0

lb0 interface

vagrant@lb0:~$ 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: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 02:56:36:6f:95:58 brd ff:ff:ff:ff:ff:ff
    inet 10.0.2.15/24 brd 10.0.2.255 scope global dynamic enp0s3
       valid_lft 85750sec preferred_lft 85750sec
    inet6 fe80::56:36ff:fe6f:9558/64 scope link 
       valid_lft forever preferred_lft forever
3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 08:00:27:90:fd:43 brd ff:ff:ff:ff:ff:ff
    inet 192.168.66.11/24 brd 192.168.66.255 scope global enp0s8
       valid_lft forever preferred_lft forever
    inet 192.168.66.100/32 scope global enp0s8
       valid_lft forever preferred_lft forever
    inet 192.168.55.100/32 scope global enp0s8
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fe90:fd43/64 scope link 
       valid_lft forever preferred_lft forever
4: enp0s9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 08:00:27:9c:bb:05 brd ff:ff:ff:ff:ff:ff
    inet 192.168.55.11/24 brd 192.168.55.255 scope global enp0s9
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fe9c:bb05/64 scope link 
       valid_lft forever preferred_lft forever

root@lb0:~# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.55.100:80 wrr
  -> 192.168.66.111:80            Masq    100    0          0         
  -> 192.168.66.112:80            Masq    100    0          0         

rs0 interface

vagrant@rs0:~$ 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: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 02:56:36:6f:95:58 brd ff:ff:ff:ff:ff:ff
    inet 10.0.2.15/24 brd 10.0.2.255 scope global dynamic enp0s3
       valid_lft 83646sec preferred_lft 83646sec
    inet6 fe80::56:36ff:fe6f:9558/64 scope link 
       valid_lft forever preferred_lft forever
3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 08:00:27:05:30:c1 brd ff:ff:ff:ff:ff:ff
    inet 192.168.66.111/24 brd 192.168.66.255 scope global enp0s8
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fe05:30c1/64 scope link 
       valid_lft forever preferred_lft forever

vagrant@rs0:~$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.66.100  0.0.0.0         UG    0      0        0 enp0s8
0.0.0.0         10.0.2.2        0.0.0.0         UG    100    0        0 enp0s3
10.0.2.0        0.0.0.0         255.255.255.0   U     0      0        0 enp0s3
10.0.2.2        0.0.0.0         255.255.255.255 UH    100    0        0 enp0s3
192.168.66.0    0.0.0.0         255.255.255.0   U     0      0        0 enp0s8

cl0

vagrant@cl0:~$ curl http://192.168.55.100
rs0
vagrant@cl0:~$ curl http://192.168.55.100
rs1
vagrant@cl0:~$ curl http://192.168.55.100
rs0
vagrant@cl0:~$ curl http://192.168.55.100
rs1
vagrant@cl0:~$ curl http://192.168.55.100
rs0
vagrant@cl0:~$ curl http://192.168.55.100
rs1

vagrant halt rs1

vagrant@cl0:~$ curl http://192.168.55.100
rs0
vagrant@cl0:~$ curl http://192.168.55.100
rs0
vagrant@cl0:~$ curl http://192.168.55.100
rs0

## compulsively --provision for `route add default gw <GATEWAY>`
vagrant up rs1 --provision

ref

• LVS+Iptables实现FULLNAT及原理分析
• LVS-NAT 原理介绍和配置实践
• lvs负载均衡-NAT与DR模型原理介绍
• LVS NAT