Red Hat Training

A Red Hat training course is available for Red Hat Enterprise Linux

6.3. Creating Guests with virt-manager

virt-manager, also known as Virtual Machine Manager, is a graphical tool for creating and managing guest virtual machines.

Procedure 6.1. Creating a guest virtual machine with virt-manager

  1. Open virt-manager

    Start virt-manager. Launch the Virtual Machine Manager application from the Applications menu and System Tools submenu. Alternatively, run the virt-manager command as root.

  2. Optional: Open a remote hypervisor

    Select the hypervisor and click the Connect button to connect to the remote hypervisor.

  3. Create a new virtual machine

    The virt-manager window allows you to create a new virtual machine. Click the Create a new virtual machine button (Figure 6.1, “Virtual Machine Manager window”) to open the New VM wizard.
    Virtual Machine Manager window

    Figure 6.1. Virtual Machine Manager window

    The New VM wizard breaks down the virtual machine creation process into five steps:
    1. Naming the guest virtual machine and choosing the installation type
    2. Locating and configuring the installation media
    3. Configuring memory and CPU options
    4. Configuring the virtual machine's storage
    5. Configuring networking, architecture, and other hardware settings
    Ensure that virt-manager can access the installation media (whether locally or over the network) before you continue.

  4. Specify name and installation type

    The guest virtual machine creation process starts with the selection of a name and installation type. Virtual machine names can have underscores (_), periods (.), and hyphens (-).
    Name virtual machine and select installation method

    Figure 6.2. Name virtual machine and select installation method

    Type in a virtual machine name and choose an installation type:
    Local install media (ISO image or CDROM)
    This method uses a CD-ROM, DVD, or image of an installation disk (for example, .iso).
    Network Install (HTTP, FTP, or NFS)
    This method involves the use of a mirrored Red Hat Enterprise Linux or Fedora installation tree to install a guest. The installation tree must be accessible through either HTTP, FTP, or NFS.
    Network Boot (PXE)
    This method uses a Preboot eXecution Environment (PXE) server to install the guest virtual machine. Setting up a PXE server is covered in the Deployment Guide. To install using network boot, the guest must have a routable IP address or shared network device. For information on the required networking configuration for PXE installation, refer to Section 6.4, “Creating Guests with PXE”.
    Import existing disk image
    This method allows you to create a new guest virtual machine and import a disk image (containing a pre-installed, bootable operating system) to it.
    Click Forward to continue.

  5. Configure installation

    Next, configure the OS type and Version of the installation. Ensure that you select the appropriate OS type for your virtual machine. Depending on the method of installation, provide the install URL or existing storage path.
    Remote installation URL

    Figure 6.3. Remote installation URL

    Local ISO image installation

    Figure 6.4. Local ISO image installation

  6. Configure CPU and memory

    The next step involves configuring the number of CPUs and amount of memory to allocate to the virtual machine. The wizard shows the number of CPUs and amount of memory you can allocate; configure these settings and click Forward.
    Configuring CPU and memory

    Figure 6.5. Configuring CPU and memory

  7. Configure storage

    Assign storage to the guest virtual machine.
    Configuring virtual storage

    Figure 6.6. Configuring virtual storage

    If you chose to import an existing disk image during the first step, virt-manager will skip this step.
    Assign sufficient space for your virtual machine and any applications it requires, then click Forward to continue.

  8. Final configuration

    Verify the settings of the virtual machine and click Finish when you are satisfied; doing so will create the virtual machine with default networking settings, virtualization type, and architecture.
    Verifying the configuration

    Figure 6.7. Verifying the configuration

    If you prefer to further configure the virtual machine's hardware first, check the Customize configuration before install box first before clicking Finish. Doing so will open another wizard that will allow you to add, remove, and configure the virtual machine's hardware settings.
    After configuring the virtual machine's hardware, click Apply. virt-manager will then create the virtual machine with your specified hardware settings.
  9. After the installation completes, you can connect to the guest operating system. For more information, see Section 6.5, “Connecting to Virtual Machines”