Question

I want to make a simple code to load balance my 2 vps.
I want to make a load balancer for vps, not for the apache webserver or mysql.
And I want to use the third small vps to load balance my 2 vps, and I will add more in the future.
Can you guys point me the basic how load balancer work?
Is it just forwarding the tcp connection?
Any link is really appreciated.

Answer 1

The easiest way would be a round-robin DNS database.

Server:

• a.example.com (1.1.1.1)
• b.example.com (2.2.2.2)
• c.example.com (3.3.3.3)

The DNS-record would look like this:

example.com.   1800  IN  A  1.1.1.1
example.com.   1800  IN  A  2.2.2.2
example.com.   1800  IN  A  3.3.3.3

Whenever a user wants to resolve the hostname example.com the DNS server gives you the full list of addresses and your resolver chooses one.

First DNS answer would be 1.1.1.1 … second userDNS request would get a 2.2.2.2