Centos部署

一、KVM概述
KVM是Kernel Virtual Machine的简写，目前Linux发行版必须在64位的系统环境才能运行KVM，同时硬件需要支持VT技术。

1、案例前置知识点
KVM自Linux2.6.20版本后就直接整合到Linux内核，它依托CPU虚拟化指令集（如Intel-VT、AMD-V）实现高性能的虚拟化支持。由于与Linux内核高度整合，因此在性能、安全性、兼容性、稳定性上都有很好的表现。

下图是一个简单的KVM虚拟化架构，在KVM环境中运行的每个虚拟化操作系统都将表现位单个独立的系统进程。因此它可以 很方便地与Linux系统中的安全模块进行整合（SELinux），可以灵活地实现资源的管理及分配。
Centos部署KVM虚拟化平台（可跟做）

二、实施案例
1、环境需求：
Centos操作系统3台；
Windiws 7操作系统1台；
所需镜像和工具请访问：https://pan.baidu.com/s/1fPhMgWJAjnmgJI5w267QCA
提取码：7x2p

2、编辑虚拟机支持虚拟化
1）修改处理器为2个，勾选虚拟化引擎
Centos部署KVM虚拟化平台（可跟做）

2）检查CPU是否支持虚拟化
[root@centos01 ~]# cat /proc/cpuinfo | grep vmx
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf eagerfpu pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch epb tpr_shadow vnmi ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid rdseed adx smap xsaveopt dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf eagerfpu pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch epb tpr_shadow vnmi ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid rdseed adx smap xsaveopt dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp
3、安装KVM所需软件
[root@centos01 ~]# ln -sf /lib/systemd/system/graphical.target
/etc/systemd/system/default.target

[root@centos01 ~]# rm -rf /etc/yum.repos.d/CentOS-*

[root@centos01 ~]# mount /dev/cdrom /mnt/
mount: /dev/sr0 写保护，将以只读方式挂载
[root@centos01 ~]# rpm -qa | grep qemu-kvm
qemu-kvm-1.5.3-141.el7.x86_64
qemu-kvm-common-1.5.3-141.el7.x86_64
[root@centos01 ~]# rpm -qa | grep qemu-kvm-tools
[root@centos01 ~]# yum -y install qemu-kvm-tools
[root@centos01 ~]# rpm -qa | grep qemu-kvm-tools
qemu-kvm-tools-1.5.3-141.el7.x86_64
[root@centos01 ~]# rpm -qa | grep virt-install

[root@centos01 ~]# yum -y install virt-install
[root@centos01 ~]# rpm -qa | grep virt-install
virt-install-1.4.1-7.el7.noarch
[root@centos01 ~]# rpm -qa | grep qemu-img
qemu-img-1.5.3-141.el7.x86_64
[root@centos01 ~]# rpm -qa | grep bridge-utils
bridge-utils-1.5-9.el7.x86_64
[root@centos01 ~]# rpm -qa | grep libvirt
libvirt-daemon-driver-qemu-3.2.0-14.el7.x86_64
libvirt-client-3.2.0-14.el7.x86_64
libvirt-daemon-driver-interface-3.2.0-14.el7.x86_64
libvirt-daemon-driver-storage-disk-3.2.0-14.el7.x86_64
libvirt-daemon-driver-storage-3.2.0-14.el7.x86_64
libvirt-daemon-driver-storage-core-3.2.0-14.el7.x86_64
libvirt-daemon-driver-storage-mpath-3.2.0-14.el7.x86_64
libvirt-daemon-driver-storage-iscsi-3.2.0-14.el7.x86_64
libvirt-daemon-kvm-3.2.0-14.el7.x86_64
libvirt-daemon-driver-nodedev-3.2.0-14.el7.x86_64
libvirt-gconfig-1.0.0-1.el7.x86_64
libvirt-daemon-driver-storage-rbd-3.2.0-14.el7.x86_64
libvirt-daemon-driver-storage-scsi-3.2.0-14.el7.x86_64
libvirt-libs-3.2.0-14.el7.x86_64
libvirt-daemon-driver-network-3.2.0-14.el7.x86_64
libvirt-daemon-driver-nwfilter-3.2.0-14.el7.x86_64
libvirt-glib-1.0.0-1.el7.x86_64
libvirt-daemon-driver-storage-gluster-3.2.0-14.el7.x86_64
libvirt-daemon-3.2.0-14.el7.x86_64
libvirt-daemon-config-network-3.2.0-14.el7.x86_64
libvirt-gobject-1.0.0-1.el7.x86_64
libvirt-daemon-driver-storage-logical-3.2.0-14.el7.x86_64
libvirt-python-3.2.0-3.el7.x86_64
libvirt-daemon-driver-secret-3.2.0-14.el7.x86_64
[root@centos01 ~]# rpm -qa | grep virt-manager
virt-manager-common-1.4.1-7.el7.noarch
[root@centos01 ~]# yum -y install virt-manager
[root@centos01 ~]# rpm -qa | grep virt-manager

virt-manager-1.4.1-7.el7.noarch
virt-manager-common-1.4.1-7.el7.noarch
[root@centos01 ~]# lsmod | grep kvm
kvm_intel 170086 0
kvm 566340 1 kvm_intel
irqbypass 13503 1 kvm
[root@centos01 ~]# systemctl start libvirtd
[root@centos01 ~]# systemctl enable libvirtd