本文采用RHEL/CentOS7.x操作系统。
检查CPU是否支持虚拟化
KVM 是基于 x86 虚拟化扩展(Intel VT 或者 AMD-V) 技术的虚拟机软件，所以查看 CPU 是否支持 VT 技术，就可以判断是否支持KVM。有返回结果，如果结果中有vmx（Intel）或svm(AMD)字样，就说明CPU的支持的。
egrep -c '(vmx|svm)' /proc/cpuinfo
cat /proc/cpuinfo | egrep 'vmx|svm'
关闭SELinux
将 /etc/sysconfig/selinux 中的 SELinux=enforcing 修改为 SELinux=disabled
安装虚拟机组件
yum groupinstall 'Virtualization' 'Virtualization Client' 'Virtualization Platform' 'Virtualization Tools' -y
systemctl enable libvirtd
systemctl start libvirtd
Virtualization Package Groups
| Package Group | Description | Mandatory Packages | Optional Packages |
|---|---|---|---|
Virtualization Hypervisor | Smallest possible virtualization host installation | libvirt, qemu-kvm, qemu-img | qemu-kvm-tools |
Virtualization Client | Clients for installing and managing virtualization instances | gnome-boxes, virt-install, virt-manager, virt-viewer, qemu-img | virt-top, libguestfs-tools, libguestfs-tools-c |
Virtualization Platform | Provides an interface for accessing and controlling virtual machines and containers | libvirt, libvirt-client, virt-who, qemu-img | fence-virtd-libvirt, fence-virtd-multicast, fence-virtd-serial, libvirt-cim, libvirt-java, libvirt-snmp, perl-Sys-Virt |
Virtualization Tools | Tools for offline virtual image management | libguestfs, qemu-img | libguestfs-java, libguestfs-tools, libguestfs-tools-c |
查看KVM模块是否被正确加载
# ------------------------
lsmod | grep kvm
kvm_intel 162153 0
kvm 525259 1 kvm_intel
