Archive for the ‘Virtualization’ Category:
why sites suddenly stopped working in dedicated/virtual private servers
VeriSign has made some changes recently which are applied since March 1, 2010. You can read detail by clicking here
How do I fix it?
You need to log in to your control panel and modify the affected domain name’s zone file, using the table below as an example. More »
HyperVM
HyperVM is a multi-platform, multi-tiered, multi-server, multi-virtualization web based application that will allow you to create and manage different Virtual Machines each based on different technologies across machines and platforms.
HyperVM sports advanced features allowing you to manage your entire vps hosting from a single console. HyperVm has been optimized for cross data-center clusters, allowing you to have your servers spread across multiple data centers all over the world. Some key HyperVM features:
Important Post Installation Step
Using OpenVZ
OS Templates – Linux Distribution Install Media
The vzctl command is used to create and configure OpenVZ containers. Before you can create a container, you need install media for the Linux distribution you want to install. OpenVZ can NOT use CD / DVD install media (NOR .iso disk image files). OpenVZ requires what it calls an OS Template to create a container for a given Linux distribution. You can download a number of pre-created OS Templates from the OpenVZ website. This is the recommended route for new OpenVZ users. Once you are more familiar with OpenVZ you may want to create your own OS Templates from scratch using a variety of recipes available on the OpenVZ wiki. You can find pre-created OS Templates provided by the OpenVZ Project here:
http://download.openvz.org/template/precreated/
You can also find community contributed OS Templates here:
Installing OpenVZ on CentOS 5.2
The OpenVZ Project website (www.openvz.org) has a lot of quality documentation including a Users Guide PDF, a Quick Installation Guide, and a vast wiki of howto and troubleshooting articles. This article will briefly cover the installation process. You will need to be the root user for all of the following tasks.
Adding the OpenVZ yum repository
Installing OpenVZ on a CentOS 4 or CentOS 5 host is very easy because the OpenVZ Project provides an openvz.repo for use with yum. Simply download the openvz.repo file and place it in the /etc/yum.repos.d/ directory. Examine the openvz.repo file as it contains a number of repository definitions with two being enabled by default: 1) RHEL5-based kernel and 2) the OpenVZ utilities. Edit it to meet your needs. More »
OpenVZ
What is OpenVZ?
OpenVZ is operating system-level virtualization based on a modified Linux kernel that allows a physical server to run multiple isolated instances known as containers, virtual private servers (VPS), or virtual environments (VE). The preferred term these days is container. Containers are sometimes compared to chroot or jail type environments but containers are really much better in terms of isolation, security, functionality, and resource management.
OpenVZ consists of a custom Linux kernel (available from the OpenVZ Project) and some user-level tools. OpenVZ is very portable, does not rely on VT support in the CPU, and as a result it is available for a number of CPU families including x86, x86-64, IA-64, PowerPC and SPARC.
OS-level virtualization is quite different from machine / hardware virtualization products such as VMware Server, Parallels Workstation, VirtualBox, QEMU, KVM, and Xen in that with OpenVZ you can only do Linux on Linux virtualization.