I would like to install and configure KVM ENV(A virtualized environment with kernel based virtual machine) on my centos or rhel. How do I install and configure KVM hypervisor under centos or rhel operating system? this post will guide you how to install and configure KVM hypervisor so that you can create a virtual machine.
You need to install some virtualization tools and Corresponding Packages of KVM, such as: kvm, qemu-kvm, python-virtinst, libvirt..etc.
1# CentOS install KVM Packages and virtualization tools
To install KVM Packages and other corresponding virtualization tools, issue the following command:
yum install kvm qemu-kvm python-virtinst libvirt libvirt-python virt-manager libguestfs-tools
or
yum groupinstall "Virtualisation Tools" "Virtualization Platform" yum install python-virtinst
outputs:
Loaded plugins: fastestmirror, refresh-packagekit, security, versionlock Loading mirror speeds from cached hostfile * base: mirrors.pubyun.com * extras: mirrors.pubyun.com * updates: mirrors.pubyun.com Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package libguestfs-tools.x86_64 1:1.20.11-11.el6 will be installed --> Processing Dependency: libguestfs-tools-c = 1:1.20.11-11.el6 for package: 1:libguestfs-tools-1.20.11-11.el6.x86_64 --> Processing Dependency: libguestfs = 1:1.20.11-11.el6 for package: 1:libguestfs-tools-1.20.11-11.el6.x86_64 --> Processing Dependency: perl(Win::Hivex) >= 1.2.7 for package: 1:libguestfs-tools-1.20.11-11.el6.x86_64 --> Processing Dependency: perl(XML::Writer) for package: 1:libguestfs-tools-1.20.11-11.el6.x86_64 --> Processing Dependency: perl(Sys::Virt) for package: 1:libguestfs-tools-1.20.11-11.el6.x86_64 --> Processing Dependency: perl(Sys::Guestfs::Lib) for package: 1:libguestfs-tools-1.20.11-11.el6.x86_64 --> Processing Dependency: perl(Sys::Guestfs) for package: 1:libguestfs-tools-1.20.11-11.el6.x86_64 ...
2# start libvirtd service
The libvirtd program is the server side daemon component of the libvirt virtualization management system.
This daemon runs on host servers and performs required management tasks for virtualized guests. This includes activities such as starting, stopping and migrating guests between host servers, configuring and manipulating networking, and managing storage for use by guests.
type the following command:
service libvirtd start
checking the libvirtd status, issue the below command:
service libvirtd status
outputs:
libvirtd (pid 31128) is running...
3# install and configure network bridge
You need to create a network bridege so that the vms can communicate each other or connect to the internet or LAN.Firstly, issue the following command to install brigde-utils package.
yum install bridge-utils
outputs:
[root@osetc]# yum install bridge-utils Loaded plugins: fastestmirror, refresh-packagekit, security, versionlock Loading mirror speeds from cached hostfile * base: mirrors.pubyun.com * extras: mirrors.pubyun.com * updates: mirrors.pubyun.com Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package bridge-utils.x86_64 0:1.2-9.el6 will be updated ---> Package bridge-utils.x86_64 0:1.2-10.el6 will be an update --> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Updating: bridge-utils x86_64 1.2-10.el6 base 30 k Transaction Summary ================================================================================ Upgrade 1 Package(s) Total download size: 30 k Downloading Packages: bridge-utils-1.2-10.el6.x86_64.rpm | 30 kB 00:00 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Updating : bridge-utils-1.2-10.el6.x86_64 1/2 Cleanup : bridge-utils-1.2-9.el6.x86_64 2/2 Verifying : bridge-utils-1.2-10.el6.x86_64 1/2 Verifying : bridge-utils-1.2-9.el6.x86_64 2/2 Updated: bridge-utils.x86_64 0:1.2-10.el6 Complete!
Configuring Network Bridge
Edit the configuration file of network interface “/etc/sysconfig/network-scripts/ifcfg-eth0“, adding the following line and uncomment “IPADDR“, “NETMASK“.
BRIDGE=br0
Then create a new network bridge configuration file named “ifcfg-br0” under “/etc/sysconfig/network-scripts” directory and adding the following lines:
DEVICE=br0 TYPE=Bridge BOOTPROTO=static ONBOOT=yes IPADDR=192.168.1.100 NETMASK=255.255.255.192 DELAY=0
Restart network service
type:
service network restart
done….