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By Udayendu Kar Technical ArchitectAvaya India Pvt Ltd

Agenda: Virtualization with KVM & oVirt KVM vs Xen architecture Combination of Qemu & KVM Libvirt architecture KVM userspace tools

virt-manager oVirt

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Qemu + KVM Qemu (userspace tool) KVM (Hypervisor)

Libvirt as an interface between user space and kernel space. The below image indicates all the supported tools in user and kernel spaces.

Refer: http://wiki.libvirt.org/page/Main_Page

CentOS 6 64-Bit EPEL repo: # wget http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm # rpm -ivh epel-release-6-8.noarch.rpm

Check Hardware Virtualization Supoort:KVM requires hardware virtualization support such as Intel VT or AMD's AMD-V, which are instruction set extensions for hardware-assisted virtualization. Check if hardware virtualization support is available on CentOS host machine:

$ egrep -i 'vmx|svm' --color=always /proc/cpuinfo

If CPU flags contain "vmx" or "svm", it means hardware virtualization support is available.

Install KVM, QEMU and user-space tools:

a) Install KVM, virt-manager and virtinst (a tool to create VMs) as follows:

# yum install kvm libvirt python-virtinst qemu-kvm virt-manager qemu-system-x86 openssh-askpass libcanberra-devel virt-install virsh

b) Start libvirtd daemon, and set it to auto-start:

# service libvirtd start # chkconfig libvirtd on

Then use virt-manager tool to start the virtual machine creation.

ArchitectureoVirt manages virtual machines, storage and virtualized networks. It is a virtualization platform with an easy-to-use web interface and is powered by the Open Source you know - KVM on Linux.

Reference Documentation Links:

http://www.linux-kvm.org/page/Main_Page https://virt-manager.org/ http://www.ovirt.org/

Questions ??