Virtualization allows multiple operating systems to run on a single physical server, by creating virtualized versions of the underlying hardware. Linux is a popular choice for the host operating system in virtualization environments, as it is open-source and has many tools available for managing virtual machines. Some popular virtualization software for Linux include VMware, VirtualBox, and KVM (Kernel-based Virtual Machine). These tools allow you to create and manage virtual machines, set resource allocations, and easily move virtual machines between host systems.
What makes it Kernel?
Kernel-based virtualization refers to virtualization technology that is built into the kernel of an operating system. The kernel is the core of an operating system, responsible for managing hardware resources and providing a interface for applications to interact with those resources.
In the case of KVM (Kernel-based Virtual Machine), the virtualization is implemented as a kernel module, which is loaded into the Linux kernel at runtime. This allows KVM to directly access the underlying hardware resources, such as the CPU and memory, and create virtualized versions of them for the virtual machines. This allows for a more efficient virtualization solution, as there is less overhead in communication between the host and guest operating systems.
Additionally, KVM does not require any modification to the guest operating system, as it virtualizes the underlying hardware directly. This allows for a wider range of operating systems to be run as guests on KVM, as opposed to other virtualization solutions that require modification to the guest operating system.
How to install Virtualization Linux Server?
Installing a virtualization solution on a Linux server typically involves a few steps:
- Install the virtualization software: Depending on the virtualization software you choose, you may need to install it on your Linux server. For example, to install KVM on Ubuntu, you can use the command: sudo apt-get install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils
- Configure the virtualization software: Once the software is installed, you’ll need to configure it to work with your server’s hardware. This may involve setting up virtual networks, configuring storage, and allocating resources to virtual machines.
- Create virtual machines: Once the virtualization software is set up, you can create virtual machines. This can be done through the command line, or through a graphical user interface provided by the virtualization software.
- Install the guest operating system: Once a virtual machine is created, you can install the guest operating system. This is typically done by creating a virtual disk, and then booting from an ISO image of the operating system installation media.
- Start and manage virtual machines: Once the virtual machines are created and the guest operating systems are installed, you can start, stop, and manage the virtual machines through the command line or GUI.
How to Maintain the Virtualization Linux server?
Maintaining a virtualization Linux server involves several tasks to ensure the smooth operation of the virtualized environment and the virtual machines running on it. Some of these tasks include:
- Keeping the host operating system and virtualization software up to date: This includes applying security patches and updates to the Linux host and the virtualization software to fix bugs and vulnerabilities.
- Monitoring resource usage: Regularly monitoring the host’s resource usage, such as CPU, memory, and storage, will help you identify any potential issues and ensure that virtual machines have enough resources to operate properly.
- Backing up virtual machines: Regularly backing up virtual machines is important in case of data loss or corruption. This can be done by creating snapshots of the virtual machines or by using backup software specifically designed for virtual environments.
- Managing storage: Virtual machines consume a significant amount of storage, so it’s important to monitor the storage usage and ensure that there is enough space for new virtual machines and updates.
- Managing network: Virtualization software often uses virtual networks to connect virtual machines to the host and to the outside world. It is important to monitor and troubleshoot the virtual networks to ensure that virtual machines can communicate with one another and with the host.
- Managing security: Keeping the virtualized environment secure is important. This includes securing the host operating system and virtualization software, as well as the guest operating systems running on the virtual machines.
Virtualization Linux Server cost?
The cost of a virtualization Linux server can vary depending on several factors, such as the hardware specifications, the virtualization software used, and the level of support required.
For the hardware, the cost can range from a few hundred dollars for a basic server to several thousand dollars for a high-end server with multiple processors and large amounts of memory and storage.
The virtualization software also plays a big role in the cost. Many open-source virtualization solutions, such as KVM, are free to use, but may require additional costs for support and management tools. Commercial virtualization solutions, such as VMware, can range from several hundred to several thousand dollars depending on the number of virtual machines and the level of support required.
Additionally, there are also cloud-based virtualization services like AWS, Azure, Google Cloud, etc. which allows you to rent virtual machines on a pay-as-you-go basis, which can be more cost-effective for organizations with variable or unpredictable workloads.
In general, the cost of a virtualization Linux server can range from a few hundred to several thousand dollars, depending on the specific requirements and scale of the virtualized environment. It’s important to evaluate your organization’s needs and budget to determine the best solution for your virtualization needs.