Red Hat Enterprise Linux 5 Administration Unleashed

Introducing the virsh Command 539Follow the instructions from Chapter 1 to install the guest OS on the newly created VM.The last step of the installation program is to click the Reboot button to reboot thesystem and complete the installation. After the VM shuts down for the reboot, the VM isnot automatically restarted and the VM name disappears from the list of domains in theVirtual Machine Manager window. Refer to the section “Starting and Stopping the VirtualMachine” to learn how to start the VM and the guest OS.With virt-installThe virt-install interactive command-line tool can be used to set up the domain andthen start the installation program. Execute the virt-install command as root to begin.The same questions from the Virtual Machine Manager are asked along with whether thegraphical or text-based installation program should be used. After the VM is successfullyset up, the virtual machine window appears as with the graphical application. Thecommand-line process should look similar to Listing B.1.LISTING B.1Creating a Virtualization Domain with virt-installWould you like a fully virtualized guest (yes or no)? This will allow you to rununmodified operating systems. noWhat is the name of your virtual machine? rhel5How much RAM should be allocated (in megabytes)? 500What would you like to use as the disk (path)? /vm/rhel5How large would you like the disk to be (in gigabytes)? 4000Would you like to enable graphics support? (yes or no) yesWhat is the install location? nfs:installs.example.com:/trees/rhel5serverBStarting install...Just like with the Virtual Machine Manager, the system shuts down after the installationand will not automatically start up again. Refer to the section “Starting and Stopping theVirtual Machine” for detailed instructions.Introducing the virsh CommandAs of the initial release of Red Hat Enterprise Linux 5, the Virtual Machine Manager haslimited functionality. A few VM management actions such as shutting down the guest OSand altering the amount of dedicated resources can be done with the Virtual MachineManager. If you installed an updated version of Red Hat Enterprise Linux 5, refer to theRelease Notes to determine if additional functionality has been added to the program.To perform additional actions, the virsh and xm utilities are available to use from thecommand line of the host OS so that additional tasks can be performed.