Implementing LVS Load Balancing (NAT) on VMware

In this paper, the implementation of LVS using NAT mode, about NAT topology map please refer to my previous article, this article purely experimental, NAT in production environment is not recommended, because the load balancer easy to become a bottleneck!

Install version centos-6.5-x86_64-minimal on 1.vmware9

2. When the installation is complete, set its hostname to Lvs-master

Hostname lvs-mastersudo-i

3. Then copy two copies of the virtual machine files to become RS1 and RS2

Three virtual machines are bridged network mode, the biggest advantage is the direct use of real routes to them in the same LAN can access each other. There is no need to configure two network cards on the Lvs-master, just configure one more virtual IP.

4. Configure on the Lvs-master:

Modprobe-l |grep Ipvs

If you see it as a result, you can continue.

Installing Ipvsadm

Yum-y Install Ipvsadm

Open Nginx

Service Nignx Startchkconfig Nginx on

Configure VIP 192.168.83.198 Let it provide HTTP service to the outside

Ifconfig eth0:0 192.168.83.198 netmask 255.255.255.255 Broadcast 192.168.83.230

Let it have the IP forwarding function

Echo 1 >/proc/sys/net/ipv4/ip_forward

Configure Virtual Services

Ipvsadm-a-T 192.168.20.87:80-s WLC

Add a real Server1

Ipvsadm-a-T 192.168.83.198:80-r 192.168.83.87-g

Add a real Server2

Ipvsadm-a-T 192.168.83198:80-r 192.168.83.88-g

Finally, write the above five scripts on the/etc/rc.local and let the machine start to run automatically.

5. Configure on the RS1

Add the following four sentences to the end of the/etc/sysctl.conf file:

Net.ipv4.conf.lo.arp_ignore = 1net.ipv4.conf.lo.arp_announce = 2net.ipv4.conf.all.arp_ignore = 1net.ipv4.conf.all.arp_announce = 2

Above indicates that ARP is turned off

Ifconfig lo:0 192.168.83.198 netmask 255.255.255.255 broadcast 192.168.83.198 up

Add route

Route add-host 192.168.83.198 Dev lo:0

Open Nginx Service

Service Nginx Start

Represents index.html

Echo ' The response is from Real Server1 ' >/var/www/html/index.html

6. Configuration on RS2 and RS1 similarity

7. Final Test

The last visit to 192.168.83.198 will appear the response is from real server1 or the response is from real server2~

That ' s it!

Implementing LVS Load Balancing (NAT) on VMware