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6/18/2011 – CloudLinux and cPanel

Posted by admin on 18 06 2011.

Operating a web hosting business requires each of us to update constantly not only our knowledge and skills, but also the functional stability and reliability of our servers. Many of the servers in the world today rely on the tried and proven Linux platform. Even with the many different variations of web hosting packages that have become almost common in the web hosting industry, such as shared hosting, VPS hosting, and dedicated servers, Linux is the solid workhorse of the industry. However, one of these hosting packages has its own set of problems.

Shared hosting allows for us to maximize the use of our servers while serving more clients and their web hosting needs. While this concept does work very well, it does present us with a persistent problem. When one of the individual accounts on a shared server has an increase in traffic; executes a poorly written script; or encounters a security problem such as a denial of service attack, most if not all of those accounts on the shared server would experience significant issues, or the server could crash altogether. Given Linux’ strong history in the industry, it is little wonder that there is a Linux based solution to this problem — CloudLinux.

[toggle title=”What is CloudLinux?”] CloudLinux is one of the latest innovations and is capable of running our shared hosting environments even more efficiently, while providing added security to our servers. In examples as we mentioned previously, when one of the individual accounts on our shared server encounters a spike, CloudLinux isolates that account so the other tenants on the server can continue functioning normally.

[/toggle] [toggle title=”What are some of CloudLinux’ features?”]
  1. One of CloudLinux’ most valued features is what CloudLinux refers to as “Tenant Isolation.” Each “tenant” on the shared host is isolated from the other tenant. This isolation maintains the stability for everyone, and the only tenant that is affected is the tenant that created the issue initially.
  2. CloudLinux sets the resource limits for each tenant on the shared server. This resource limit is achieved at the kernel level, and it ensures that each account uses only its allocated resources and does not impose on any other account.
  3. Conversion from CentOS to Red Hat Linux (RHEL) is easy and only takes about 5-10 minutes using yum, and only involves a few rpm’s.
  4. Customer support is available 24/7 to respond to any inquiries or concerns.
  5. Security patches are regularly released.
  6. CloudLinux provides the capability to limit the amount of resources that each of your applications is permitted to use.
  7. CloudLinux can also be set to update automatically.
  8. CloudLinux is also available for virtual machines.
  9. CloudLinux is completely transparent to clients, end-users, and administrators.
  10. Once the tenant that has experienced the spike has reached its resource limits, the users that visit that site will receive a 503 error until the tenant is within its resource limits.
[/toggle] [toggle title=”How can I install CloudLinux on my servers?”]

Switching your cPanel server from CentOS to RHEL is very easy. Unless you have purchased CloudLinux from the cPanel, you will need your activation key when you run the downloaded script from the command line. Once the script has completed, you will need to reboot your server, then CloudLinux will then be the live kernel on your server.

We have only touched the surface of this exciting new version of Linux that is set to improve the reliability of our servers, and the satisfaction of our clients. There is also the greater enhancement of security that CloudLinux brings as well. When one site is attacked, then CloudLinux isolates the tenant, thereby protecting the other tenants as well as the server. In today’s global environment, any added security feature that works is a good thing to have on our servers.

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