The vRack is also known as the virtual rack. It enables you to create a private network of your own which is isolated from the public network connections. The use of the vRack requires servers which physically has an double network interface card. We will show the NIC below.
eth0 (left) and eth1 (right)
Typically a server will connect to the Internet and maybe used for a number of functions such as a web server, mail server and host applications. All these connections are done via the eth0, this particular connection works very well. Let’s say our server is operating as a web server and hosting websites. This means our server will have the website information and the database.
It is highly recommended that regular backs are maintained. Backing up a database via a public interface is typically deterred. This is because the information in the database is sensitive, it would contain usernames and passwords.
However we would still need to perform a backup. The vRack will enable the creation of a private network via eth1. As this is a private network, we is able to make use of private IP addressing. Instead of keeping our database on a public connection of eth0, we will link our front end website to our backed database at “192.168.0.1”. This IP is similar to your office WIFI or home broadband. This IP is isolated from the network and is only accessible via the interface eth1 which is provided from the vRack.
As we is using both interfaces eth0 and eth1, they come with their own independent network speed. This means eth0 will be used for all front end calls on the web server, eth1 will be the back end.
We can also use eth1 and create another IP with “192.168.0.2” as our backup IP address. As “192.168.0.2” is on our eth1 we can make an live backup of our database without affecting our front end on eth0. We wouldn’t need to perform backups at late night to ensure minimal impact and putting up maintenance holding pages.
In my examples I have used the most common IP addressing from “192.168.0.*”. You can of course define your own IP in which you wish to use and it doesn’t have to be from the same range. Your free to use any IP within the reserved IP block.
You can look to configure the basic vRack here.