Configuring Linux systems to support virtualization technology development

Configuring Linux systems to support virtualization technology development

Virtualization technology is an integral part of modern cloud computing environments. As a representative of open source operating systems, Linux system has good virtualization support. This article will introduce how to configure a Linux system to support virtualization technology development and provide relevant code examples.

Step 1: Check hardware support
First, we need to ensure that the computer hardware supports virtualization technology. Most modern hardware supports virtualization, but we still need to confirm. Open a terminal and run the following command:

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

If the output result is greater than 0, it means that the hardware supports virtualization. Otherwise, the virtualization option needs to be enabled in the BIOS.

Step 2: Install KVM
KVM is a virtualization module in the Linux kernel that can create and manage virtual machines in the Linux system. Open a terminal and run the following command to install KVM:

sudo apt-get install qemu-kvm libvirt-daemon-system libvirt-clients bridge-utils

After the installation is complete, we need to add the current user to the libvirtd user group in order to manage the virtual machine. Run the following command:

sudo adduser <username> libvirtd

Step 3: Configure the network
Virtualization technology requires configuring the network to allow the virtual machine to communicate with the host and other virtual machines. First, we need to create a bridge. Open a terminal and run the following command:

sudo nano /etc/netplan/01-netcfg.yaml

Add the following content to the file:

network:
  ethernets:
    br0:
      dhcp4: true
      interfaces: []
  bridges:
    br0:
      dhcp4: true
      interfaces:
        - eth0

Save and close the file. Then, run the following command to apply the configuration changes:

sudo netplan apply

Step Four: Create the Virtual Machine
Now that we have completed the basic configuration, we can create the virtual machine. Open a terminal and run the following command:

virt-install --name <vm-name> --disk size=<vm-disk-size> --ram <vm-ram-size> 
--vcpus <vm-cpu-count> --os-type linux --os-variant ubuntu18.04 
--network bridge=br0 --graphics none --console pty,target_type=serial 
--location '<iso-path>' --extra-args='console=ttyS0,115200n8 serial'

Where, 917e1e2d83919ffcf654aba59e03ce6b is the name of the virtual machine, d220517d17467589018f205bebfc4b82 is the size of the virtual machine disk, abe4ded6e6951feb03b596c09cbb8ef2 is the number of CPUs of the virtual machine, 09d82b97afff9908f60fad075a44eae9 is the path to the ISO file.

Step 5: Start the virtual machine
After completing the creation, we can start the virtual machine. Open a terminal and run the following command:

virsh start <vm-name>

where 917e1e2d83919ffcf654aba59e03ce6b is the name of the virtual machine.

Step 6: Connect to the virtual machine
After the virtual machine is started, we can use SSH or other methods to connect to the virtual machine. Open a terminal and run the following command:

ssh <vm-ip-address>

Where, 2ce7ac9d9861b28743f1cf5f4cc21411 is the IP address of the virtual machine.

The above are the steps to configure the Linux system to support the development of virtualization technology. Through these steps, we can create and manage virtual machines on Linux systems to meet various development needs.

I hope this article will be helpful to you, and I wish you success in your virtualization technology development!

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