第 167 章 Kernel-based Virtual Machine(KVM)

167.1. kvm install usage yum

确认处理器是否支持KVM

egrep 'vmx|svm' /proc/cpuinfo
		

对当前系统做一个全面升级

sudo yum update
sudo yum upgrade
		

Installing

如果你不想安装Virtualization组，想单独安装需要的软件，可是使用下面命令

# yum install qemu-kvm libvirt virt-install bridge-utils
		

确认kvm已经安装

lsmod | grep kvm

# lsmod | grep kvm
kvm_intel             138567  0
kvm                   441119  1 kvm_intel
		

Create the disk image

qemu-img create -f qcow2 disk.img 5G

or

dd if=/dev/zero of=disk.img bs=1G count=5

# qemu-img create -f qcow2 disk.img 5G
Formatting 'disk.img', fmt=qcow2, size=5242880 kB

# dd if=/dev/zero of=disk.img bs=1G count=5
5+0 records in
5+0 records out
5368709120 bytes (5.4 GB) copied, 61.0353 seconds, 88.0 MB/s
		

Creating a virtual machine

/usr/libexec/qemu-kvm -hda disk.img -cdrom archlinux-2009.08-core-x86_64.iso -m 512 -boot d
		

如果你不在localhost上安装OS,你需要指定vnc,这样你可以远程连接到kvm

[root@scientific ~]# /usr/libexec/qemu-kvm disk.img -cdrom rhel-server-5.6-x86_64-dvd.iso -m 8000 -boot d -vnc :1
		

[root@scientific ~]# yum install -y virt-manager virt-top virt-v2v virt-viewer
or
[root@scientific ~]# yum groupinstall 'Virtualization'
		

167.1.1. brctl / tunctl

[root@scientific ~]# yum install -y tunctl
			

DHCP

brctl addbr br0
ifconfig eth0 0.0.0.0
brctl addif br0 eth0
dhclient br0
tunctl -b -u root
ifconfig tap0 up
brctl addif br0 tap0
			

STATIC IP Address

brctl addbr br0
ifconfig eth0 0.0.0.0
brctl addif br0 eth0
ifconfig br0 up
tunctl -b -u root
ifconfig tap0 up
brctl addif br0 tap0

ifconfig br0 192.168.1.120 netmask 255.255.255.0 up
ip route add default via 192.168.3.1 dev br0
			

[root@scientific ~]# ip route
192.168.3.0/24 dev br0  proto kernel  scope link  src 192.168.3.43
192.168.3.0/24 dev tap0  proto kernel  scope link  src 192.168.3.21

default via 192.168.3.1 dev br0
[root@scientific ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.4ea7e4cf4633       no              eth0
                                                        tap0
br06499         8000.000000000000       no
			

启动KVM

指定网络参数 -net nic -net tap,ifname=tap0,script=no

/usr/libexec/qemu-kvm -hda disk.img -m 8000 -net nic -net tap,ifname=tap0,script=no -vnc :1

/usr/libexec/qemu-kvm -hda disk.img -m 8000 -net nic -net tap,ifname=tap0,script=no -nographic -daemonize
			

167.1.2. virt-install

yum install -y libvirt python-virtinst virt-manager
			

命令行安装

sudo virt-install --connect qemu:///system -n Ubuntu32 -r 512 --vcpus=1 -f /dev/sda3 -s 9 -c Desktop/ubuntu-10.10-desktop-i386.iso --vnc --noautoconsole --os-type linux --os-variant generic26 --accelerate --network=bridge:virbr0 --hvm
sudo virt-install --connect qemu:///system -n Ubuntu32 -r 512 --vcpus=1 -f ~/ubuntu32.qcow2 -s 12 -c esktop/ubuntu-10.10-desktop-i386.iso --vnc --noautoconsole --os-type linux --os-variant generic26 --accelerate --network=bridge:br0 --hvm
			

进入GUI工具

virsh -c qemu:///system list
sudo virt-manager
		

原文出处：Netkiller 系列 手札
本文作者：陈景峯
转载请与作者联系，同时请务必标明文章原始出处和作者信息及本声明。