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Linux - How to a Setup Virtual Machine Server


  • Ubuntu 22.04.1 LTS installed on a computer. If you are using a Virtual Machine you must ensure that nested virtualisation is supported and enabled. egrep -i '(vmx|svm)' /proc/cpuinfo will show if virtualisation is supported.
  • A Workstation to connect to the Virtual Machine Server.
  • The Virtual Machine Server should have 2 NICs, 1 for SSH connectivity and a 2nd that can be used to configure a network bridge device. If you are using a Virtual Machine you must ensure that MAC address spoofing is allowed for the 2nd NIC.
  • A DHCP Server on the same network as the 2nd NIC.
  • Adequate storage to store vDisks and VM Images. These instructions assume that you have created a new logical volume for this purpose.


Virtual Machine Server Setup

  • Install packages and check libvirtd is running:
    • sudo apt update
    • sudo apt install bridge-utils libvirt-clients libvirt-daemon-system qemu-system-x86
    • systemctl status libvirtd
  • Configure logical volume for vDisk and VM Image storage:
    • sudo vi /etc/fstab and add the following line: /dev/vg-images/lv-images /var/lib/libvirt/images ext4 defaults 0 1
    • Mount the filesystem using sudo mount -a
    • Grant the kvm group permission to /var/lib/libvirt/images using:
      • sudo chown :kvm /var/lib/libvirt/images
      • sudo chmod g+rw /var/lib/libvirt/images
      • sudo systemctl restart libvirtd
      • sudo systemctl status libvirtd
  • Grant your user permission to manage the Virtual Machine Server:
    • sudo usermod -aG kvm rich
    • sudo usermod -aG libvirt rich
  • Update the network configuration to include a network bridge device so that Virtual Machines may connect to the network - sudo vi /etc/netplan/00-installer-config.yaml:
  version: 2
        addresses: []
        - to: default
      dhcp4: false

      interfaces: [eth1]
      dhcp4: true
        stp: false
        forward-delay: 0
  • sudo netplan apply

Virtual Machine Manager Workstation Setup

  • Install Virtual Machine Manager to connect to Virtual Machine Server:
    • sudo apt install ssh-askpass virt-manager
    • Connect to the Virtual Machine Server using SSH before you attempt to use Virtual Machine Manager.
    • Open Virtual Machine Manager and Add Connection vmm
  • Create a storage pool to store ISOs:
    • Right-click the Connection> Details then select the Storage tab.
    • Create a storage pool with Target Path: /var/lib/libvirt/images/ISO.

Virtual Machine Server ISO Library Setup

  • Make sure the permissions are set correctly for /var/lib/libvirt/images/ISO:
    • sudo chown root:kvm /var/lib/libvirt/images/ISO
    • sudo chmod g+rw /var/lib/libvirt/images/ISO
  • Download ISO Image ready to create a Virtual Machine:
    • cd /var/lib/libvirt/images/ISO
    • wget

Virtual Machine Deployment

  • Within Virtual Machine Manager, right-click a Connection and create New VM.
    • Use the ISO Library path to select an ISO.
    • A Bridge deviceā€¦ with Device name: br0 should be set for your Network selection.
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