CENTOS7-KVM Installation

CentOS 7.0 Install KVM

Pre-install

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KVM-related installation packages and their role

QEMU-KVM Main KVM Package

Python-virtinst command-line tools and libraries required to create a virtual machine

Virt-managergui Virtual Machine Management tools

Virt-top Virtual Machine Statistics command

Virt-viewergui connector, connecting to a configured virtual machine

LIBVIRTC Language Toolkit, providing libvirt services

Libvirt-client A C language toolkit for virtual clients

Virt-install Virtual machine creation commands based on the Libvirt service

Bridge-utils tools for creating and managing bridging devices

INSTALL

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[Email protected]~]# yum install QEMU-KVM libvirt virt-install bridge-utils

#查看是否加载kvm模块

[[Email protected]~]# lsmod|grep KVM

Kvm_intel 138567 0

KVM 441119 1 Kvm_intel

#如果没有这两条, can be loaded with "modprobe KVM";

#相关命令 "Insmod;rmmod;modinfo"

#启动libvirtd

[[Email protected]~]# systemctl start Libvirtd;systemctl enable LIBVIRTD

[Email protected]~]# systemctl list-unit-files|grep LIBVIRTD

Libvirtd.service enabled

NETWORK CONFIGURATION

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#修改网卡文件eno16777736

[[Email protected]~]# cd/etc/sysconfig/network-scripts/

[[email protected] network-scripts]# echo "bridge=br0" >>ifcfg-eno16777736 Add "-e**" to #在ifcfg bridge=br0 original Nic file

#新建网桥文件ifcfg-br0 (bridge name), add the following

[Email protected] network-scripts]# VI ifcfg-br0

*************************************************

Device=br0

Type= "Bridge" #大小写敏感, so it must be bridge.

Bootproto= "DHCP"

onboot= "Yes"

delay= "0"

stp= "Yes" #这一行是来启动STP, related to the results of the BRCTL command line

*************************************************

#重启NetworkManager及network服务:

[Email protected]network-scripts]# systemctl Restart NetworkManager

#当你手动修改了网卡文件后, you need to restart the NetworkManager service to re-take over the network configuration

#网卡配置文件和NetworkManager配置冲突时, Solution: {1, restart Networkmanager;2, close NetworkManager}

[Email protected]network-scripts]# systemctl Restart Network

[Email protected] network-scripts]# IP a #ip命令用来查看和管理ip信息

1:lo:<loopback,up,lower_up> MTU 65536 qdisc noqueue State UNKNOWN

Link/loopback 00:00:00:00:00:00 brd00:00:00:00:00:00

inet 127.0.0.1/8 Scope host Lo

Valid_lft Forever Preferred_lft Forever

INET6:: 1/128 Scope Host

Valid_lft Forever Preferred_lft Forever

2:eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc pfifo_fastmaster br0 State up Qlen 1000

Link/ether 00:0c:29:61:5c:1d Brdff:ff:ff:ff:ff:ff

3:VIRBR0: <NO-CARRIER,BROADCAST,MULTICAST,UP> MTU Qdisc Noqueue Statedown

Link/ether 52:54:00:b6:45:5b Brdff:ff:ff:ff:ff:ff

inet 192.168.122.1/24 BRD 192.168.122.255scope Global virbr0

Valid_lft Forever Preferred_lft Forever

4:virbr0-nic: <BROADCAST,MULTICAST> MTU qdisc pfifo_fast master virbr0state down Qlen 500

Link/ether 52:54:00:b6:45:5b Brdff:ff:ff:ff:ff:ff

6:br0:<broadcast,multicast,up,lower_up> MTU Qdisc Noqueue State up

Link/ether 00:0c:29:61:5c:1d Brdff:ff:ff:ff:ff:ff

inet 192.168.0.32/24 BRD 192.168.0.255scope Global Dynamic Br0

Valid_lft 11979sec preferred_lft11979sec

Inet6 FE80::20C:29FF:FE61:5C1D/64 Scopelink

Valid_lft Forever Preferred_lft Forever

7:vnet0:<broadcast,multicast,up,lower_up> MTU Qdisc pfifo_fast master br0state UNKNOWN Qlen 500

Link/ether fe:54:00:cb:63:b2 Brdff:ff:ff:ff:ff:ff

Inet6 FE80::FC54:FF:FECB:63B2/64 Scope link

Valid_lft Forever Preferred_lft Forever

#查看网桥连接

[Email protected] network-scripts]# Brctl show #brctl是一个网桥连接管理命令

Bridge name Bridge ID STP enabled interfaces #如果上面不设置STP =yes, this will show no

Br0 8000.000c29615c1d Yes eno16777736

Vnet0

Virbr0 8000.525400b6455b Yes Virbr0-nic

CLOSE SELINUX

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[[Email protected]network-scripts]# setenforce 0

[[Email protected]network-scripts]# Getenforce

Permissive

[Email protected]network-scripts] #vi/etc/selinux/config

******************************************

Selinux=permissive #修改配置文件使其永久生效

******************************************

CREATE A VM

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[Email protected]~]# mkdir-p/var/kvm/images

[Email protected]~]# virt-install \

--NETWORKBRIDGE:BR0 \

--NAMEVM1 \

--ram=1024\

--vcpus=1\

--DISKPATH=/VAR/KVM/IMAGES/VM1.IMG,SIZE=10 \

--graphicsnone \

--location ' http://ftp.iij.ad.jp/pub/linux/centos/7/os/x86_64/' \

--extra-args= "console=tty0console=ttys0,115200"

#详细每个参数的意义可以查看扩展资料

#安装过程会让你选择textmode or VNC, choose TextMode to continue the installation.

#如果网络会有问题的话, try to choose--cdrom/path/to/centos7.iso

#virt-install--name vm1--ram=1024--vcpus=1--network bridge:br0--diskpath=/var/kvm/images/centos7.img,size=10-- Graphics none--location=http://ftp.iij.ad.jp/pub/linux/centos/7/os/x86_64/--extra-args= "Console=tty0 console= Ttys0,115200 "

PS: Graphical installation of virtual machines requires X-window and Virt-manager, before the installation of virtual machines are the same, the operation of the graphics is very simple

Extended Data

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Http://wiki.centos.org/zh/HowTos/KVM

http://techlinux.net/2014/09/kvm-centos-7/

http://www.server-world.info/en/note?os=CentOS_7&p=kvm&f=2

This article is from the "30 Demon People" blog, please make sure to keep this source http://301ren.blog.51cto.com/8887653/1631133

CENTOS7-KVM Installation