Red Hat Enterprise Linux



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Chapter 25: Virtualization

Virtualization

Goal

To create and use Red Hat Enterprise Linux virtual machines with Kernel-based Virtual Machine (KVM) and libvirt.

Red Hat’s default virtual machine (VM) solution,
the Kernel-based Virtual Machine (KVM)

Before installing Red Hat Enterprise Linux (RHEL), you need the right hardware.
You’ll need to have a physical system with a 64-bit CPU capable of hardware Virtualization

Qemu= virtualization emulator = red hat hypervisor
KVM= software which use qemu

If you want to know if your machine support virtualization open /proc/cpuinfo if you see flags:vmx,svm then your machine support virtualization Vmx (intel) svm (AMD)

Files and directories

/var/lib/libvirt
/var/lib/libvirt/images/ default directory to save virtual OS images
/etc/init.d/libvirtd virtualisation service
/etc/libvirt/qemu
/etc/libvirt/qemu/networks/….xml virtual network config file

Managing VMs

virt-manager open GUI VM manager
virt-install

virt-install [+]
virsh [+]

Kernel-based Virtual Machine (KVM)

Installation

Essentials Packages
qemu-kvm KVM principal package
python-virtinst command line tools and libraries for VMs creation
virt-manager GUI VM administration tool
virt-top VMs statistics commands
virt-viewer graphical connection to configured Vms
libvirt C language tools with libvirtd service
libvirt-client C language toolkit for VM clients

Principals Packages to install
qemu-kvm modules de virtualization, hypervisor
virt-manager VMs GUI manager
libvirt libvirtd service package

To create and use Red Hat Enterprise Linux virtual machines with Kernel-based Virtual Machine (KVM) and libvirt. Red Hat’s default virtual machine (VM) solution, the Kernel-based Virtual Machine (KVM) Before installing Red Hat Enterprise Linux (RHEL), you need the right hardware. You’ll need to have a physical system with a 64-bit CPU capable of hardware Virtualization Qemu= virtualization emulator = red hat hypervisor KVM= software which use qemu If youwant to know if your machine support virtualization open /proc/cpuinfo if you see flags:vmx,svm then your machine support virtualization Vmx (intel) svm (AMD) Necessary Packages qemu-kvm KVM principal package python-virtinst command line tools and libraries for VMs creation virt-manager GUI VM administration tool virt-top VMs statistics commands virt-viewer graphical connection to configured Vms libvirt C language tools with libvirtd service libvirt-client C language toolkit for VM clients Principals Packages to install qemu-kvm modules de virtualization, hypervisor virt-manager VMs GUI manager libvirt libvirtd service package Important files and directories /var/lib/libvirt /var/lib/libvirt/images/ default directory to save virtual OS images /etc/init.d/libvirtd virtualisation service /etc/libvirt/qemu /etc/libvirt/qemu/networks/….xml virtual network config file Commands virt-manager open GUI VM manager virt-install - -prompt install OS in interactive style virt-install options -n machine name -r RAM capacity in MB - - disk path= image path size= size in Go -l OS source -x extra arguments file virsh Options list- - all show all machines status autostart machinename start VM at host boot autostart -disable machinename deactivate VM autostart at host boot start machinename start VM shutdown machinename destroy machinename force machine stop
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