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How to install and configure virtualization software on Fedora with KVM

in Fedora, KVM Virtualization, Linux OS
How to install and configure virtualization software on Fedora

Virtualization is the process of creating a virtual environment that runs on top of an existing operating system. It allows multiple operating systems to run on a single physical machine, thereby maximizing hardware utilization and improving system efficiency. KVM (Kernel-based Virtual Machine) is a virtualization solution that is integrated with the Linux kernel. In this tutorial, we will show you how to install and configure virtualization software on Fedora with KVM.

How to install and configure virtualization

Check Hardware Support

First, you need to ensure that your hardware supports virtualization. To check if your CPU supports hardware virtualization, run the following command:

$ egrep -c '(vmx|svm)' /proc/cpuinfo

If the output is greater than 0, your CPU supports virtualization.

Install KVM Packages

To install KVM packages, run the following command:

$ sudo dnf install @virtualization

This command installs all the necessary packages required to run KVM on Fedora.

Configure Network Bridge

By default, KVM uses NAT (Network Address Translation) for networking. This means that all virtual machines share the same IP address as the host machine. To avoid this, we will configure a network bridge that allows the virtual machines to have their own IP addresses.

To create a network bridge, run the following command:

$ sudo nmcli connection add type bridge autoconnect yes con-name br0 ifname br0

This command creates a network bridge named br0.

Next, we need to add a physical network interface to the bridge. To do this, run the following command:

$ sudo nmcli connection modify eno1 master br0

Replace eno1 with the name of your physical network interface.

Create Virtual Machine

To create a virtual machine, you can use the virt-manager GUI or the virt-install command-line tool.

To use the virt-manager GUI, run the following command:

$ sudo virt-manager

This will open the virt-manager GUI. From here, you can create a new virtual machine by clicking on the “Create a new virtual machine” button.

To use the virt-install command-line tool, run the following command:

$ sudo virt-install \
--name myvm \
--ram 2048 \
--disk path=/var/lib/libvirt/images/myvm.img,size=20 \
--vcpus 2 \
--os-type linux \
--os-variant fedora33 \
--network bridge=br0 \
--graphics none \
--console pty,target_type=serial \
--location http://ftp.fi.muni.cz/pub/linux/fedora/linux/releases/33/Everything/x86_64/os/

This command creates a new virtual machine named myvm with 2 vCPUs and 2GB of RAM. It uses a 20GB virtual disk stored in /var/lib/libvirt/images/myvm.img. The virtual machine is connected to the br0 network bridge and uses the Fedora 33 operating system.

Access Virtual Machine

Access the virtual machine, you can use the virt-viewer GUI or the virsh console command-line tool.

Use the virt-viewer GUI, right-click on the virtual machine in the virt-manager window and select “Open”.

To use the virsh console command-line tool, run the following command:

$ sudo virsh console myvm

This command connects to the virtual machine’s console.

Conclusion

KVM is a powerful virtualization solution that is integrated with the Linux kernel. It allows you to run multiple operating systems on a single physical machine, thereby maximizing hardware utilization and improving system efficiency. In this tutorial, we showed you how to install and configure KVM on

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