Centos8使用KVM

标签：CentOS avx512 KVM 192 repo yum 使用 root Centos8

安装好Centos8后先配置yum源

[root@localhost ~]# cd /etc/yum.repos.d/
[root@localhost yum.repos.d]# mkdir yum.bak
[root@localhost yum.repos.d]# ls
CentOS-AppStream.repo   CentOS-CR.repo         CentOS-Extras.repo     CentOS-Media.repo       CentOS-Vault.repo
CentOS-Base.repo        CentOS-Debuginfo.repo  CentOS-fasttrack.repo  CentOS-PowerTools.repo  yum.bak
CentOS-centosplus.repo  CentOS-Devel.repo      CentOS-HA.repo         CentOS-Sources.repo
[root@localhost yum.repos.d]# mv *.repo yum.bak/
[root@localhost yum.repos.d]# ls
yum.bak

然后下载阿里源

wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo
[root@192 yum.repos.d]# ll
总用量 8
-rw-r--r--. 1 root root 2590 8月   4 2022 CentOS-Base.repo
drwxr-xr-x. 2 root root 4096 10月 11 05:43 yum.bak

重建缓存

[root@localhost yum.repos.d]# yum clean all
0 文件已删除
[root@localhost yum.repos.d]# yum -y makecache
CentOS-8 - Base - mirrors.aliyun.com                                                                              1.6 MB/s | 4.6 MB     00:02    
CentOS-8 - Extras - mirrors.aliyun.com                                                                             26 kB/s |  10 kB     00:00    
CentOS-8 - AppStream - mirrors.aliyun.com                                                                         1.0 MB/s | 8.4 MB     00:08    
元数据缓存已建立。

下载输入法和语言

[root@192 yum.repos.d]# yum install ibus ibus-libpinyin
[root@192 yum.repos.d]# yum install glibc-common
[root@192 yum.repos.d]# yum install -y langpacks-zh_CN

然后再图形化界面进行配置

查看CPU是否支持VT技术（虚拟化技术）若输出结果中带有svm和vmx则可以使用

svm代表cpu是amd

vmx代表cpu是intel

[root@192 ~]# cat /proc/cpuinfo | grep -E 'vmx|svm'
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology tsc_reliable nonstop_tsc cpuid extd_apicid pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw topoext perfctr_core ssbd ibrs ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 erms invpcid avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves clzero wbnoinvd arat npt svm_lock nrip_save vmcb_clean flushbyasid decodeassists avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntdq rdpid overflow_recov succor flush_l1d
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology tsc_reliable nonstop_tsc cpuid extd_apicid pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw topoext perfctr_core ssbd ibrs ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 erms invpcid avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves clzero wbnoinvd arat npt svm_lock nrip_save vmcb_clean flushbyasid decodeassists avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntdq rdpid overflow_recov succor flush_l1d
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology tsc_reliable nonstop_tsc cpuid extd_apicid pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw topoext perfctr_core ssbd ibrs ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 erms invpcid avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves clzero wbnoinvd arat npt svm_lock nrip_save vmcb_clean flushbyasid decodeassists avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntdq rdpid overflow_recov succor flush_l1d
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology tsc_reliable nonstop_tsc cpuid extd_apicid pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw topoext perfctr_core ssbd ibrs ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 erms invpcid avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves clzero wbnoinvd arat npt svm_lock nrip_save vmcb_clean flushbyasid decodeassists avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg avx512_vpopcntdq rdpid overflow_recov succor flush_l1d

查看是否加载KVM

[root@192 ~]# lsmod | grep kvm
kvm_amd               110592  0
ccp                    98304  1 kvm_amd
kvm                   753664  1 kvm_amd
irqbypass              16384  1 kvm

如上显示的结果说明已经加载，若果没有加载请执行如下命令：modprobe kvm

关闭selinux，编辑文件SELINUX=disabled

[root@192 ~]# setenforce 0
[root@192 ~]# vim /etc/sysconfig/selinux

# 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 three values:
#     targeted - Targeted processes are protected,
#     minimum - Modification of targeted policy. Only selected processes are protected. 
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

安装KVM相关软件包

[root@192 ~]# yum install qemu-kvm qemu-img \
> virt-manager libvirt libvirt-python virt-manager \
> libvirt-client virt-install virt-viewer -y
CentOS-8 - Base - mirrors.aliyun.com                                                   75 kB/s | 3.9 kB     00:00    
CentOS-8 - Extras - mirrors.aliyun.com                                                 32 kB/s | 1.5 kB     00:00    
CentOS-8 - AppStream - mirrors.aliyun.com                                             148 kB/s | 4.3 kB     00:00    
软件包 qemu-kvm-15:2.12.0-88.module_el8.1.0+248+298dec18.x86_64 已安装。
软件包 qemu-img-15:2.12.0-88.module_el8.1.0+248+298dec18.x86_64 已安装。
未找到匹配的参数： libvirt-python
错误：没有任何匹配: libvirt-python

如果出错那就一个个安装

root@192 ~]# yum install virt-manager libvirt virt-manager  libvirt-client virt-install virt-viewer -y

安装完毕回返回一个complet

检查一下libvirt-python，其实已经有了

root@192 ~]# pip3 list |grep libvirt-python
DEPRECATION: The default format will switch to columns in the future. You can use --format=(legacy|columns) (or define a format=(legacy|columns) in your pip.conf under the [list] section) to disable this warning.
libvirt-python (6.0.0)

这里先安装kvm环境

[root@192 ~]# yum install -y libvirt-devel

安装完成后也会返回完毕！

启动libvrt并设置开机自启

[root@192 ~]# systemctl start libvirtd
[root@192 ~]# systemctl enable libvirtd
Created symlink /etc/systemd/system/sockets.target.wants/libvirtd.socket → /usr/lib/systemd/system/libvirtd.socket.
Created symlink /etc/systemd/system/sockets.target.wants/libvirtd-ro.socket → /usr/lib/systemd/system/libvirtd-ro.socket.

检查机器存储

[root@192 ~]# df -hT
文件系统       类型      容量  已用  可用 已用% 挂载点
devtmpfs       devtmpfs  3.8G     0  3.8G    0% /dev
tmpfs          tmpfs     3.9G     0  3.9G    0% /dev/shm
tmpfs          tmpfs     3.9G   10M  3.8G    1% /run
tmpfs          tmpfs     3.9G     0  3.9G    0% /sys/fs/cgroup
/dev/nvme0n1p3 xfs       120G  5.4G  115G    5% /
/dev/nvme0n1p1 ext4      283M  137M  128M   52% /boot
tmpfs          tmpfs     779M  1.2M  778M    1% /run/user/42
tmpfs          tmpfs     779M  5.7M  774M    1% /run/user/0

iso里面放镜像文件

image里面放虚拟机要存储的文件

[root@192 ~]# mkdir /home/image
[root@192 ~]# mkdir /home/iso
[root@192 ~]# ll /home
总用量 4
drwxr-xr-x.  2 root root    6 10月 11 06:30 image
drwxr-xr-x.  2 root root    6 10月 11 06:30 iso
drwx------. 15 xyh  xyh  4096 10月 11 05:36 xyh
[root@192 ~]#

使用SSH工具将镜像文件传到iso文件夹中