KVM的环境配置及安装（本地版)

KVM环境配置

安装Centos

修改内核模式为兼容内核启动

[root@ localhost ~]# uname -a

Linux victory 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

[root@ localhost ~]#vim /boot/grub/grub.conf

将default=0修改为default=1

关闭SElinux,重启后生效

[root@ localhost ~]#vim /etc/sysconfig/selinux

# 修改SELINUX=disabled
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
#     targeted - Targeted processes are protected,
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

关闭防火墙

[root@ localhost ~]#chkconfig ip6tables off

[root@ localhost ~]#chkconfig iptables off

重启

reboot

查看SELINUX更改效果：

[root@victory ~]# getenforce

Disabled

查看是否支持虚拟化

[root@localhost ~]# egrep -c '(vmx|svm)' /proc/cpuinfo

如果执行这条命令的返回结果为0则表示CPU不支持虚拟化，如果返回结果为1或者大于1到数字则表示CPU支持虚拟。其中vmx为Intel的CPU指令集，svm为AMD的CPU指令集。

安装KVM

安装KVM软件包

无网络配置本地yum源安装kvm

mkdir /mnt/iso

mkdir /mnt/cdrom

将ios镜像上传到/mnt/iso

cp /dev/sr0 /mnt/iso

挂载 mount -o loop /mnt/iso /mnt/cdrom

如果不成功则输出 mount -o loop /dev/sr0 /mnt/cdrom

ls /mnt/cdrom

移动/etc/yum.repo.d文件里的*repo文件

mkdir /etc/yum.repos.d/bak

cd /etc/yum.repos.d/

mv *.repo bak

创建自己的repo文件

vi myself.repo

[base]

name=cdrom

baseurl=file:///mnt/cdrom

enabled=1

gpgckeck=0

gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-CentOS-6

输入rm -f /var/run/yum.pid

清除缓存

此时本地yum源就配置好了

安装kvm软件包

[root@localhost ~]#yum -y install kvm virt-manager libvirt libvirt-python python-virtinst libvirt-client qemu-kvm qemu-img

无网络启动libvirt

[root@localhost ~]#service libvirt restart

libvirt连接KVM

[root@localhost ~]# virsh -c qemu:///system list //用libvirt连接到超级管理程序

Id    Name                           State
----------------------------------------------------

[root@localhost ~]# lsmod |grep kvm // lsmod 命令:是一个小程序,用来显示文件、proc/modules的信息,也就是显示当前内核模块装载的模块

kvm_intel              54285  0 
kvm                   333172  1 kvm_intel

[root@localhost ~]# virsh --version

0.10.2

[root@localhost ~]# virt-install --version

0.600.0

[root@localhost ~]# ln -s /usr/libexec/qemu-kvm /usr/bin/qemu-kvm //创建软链接