Centos7-KVM Installation

标签：linux   kvm   centos   

centos 7.0 install kvm

PRE-INSTALL

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kvm相关安装包及其作用

qemu-kvm 主要的KVM程序包

python-virtinst 创建虚拟机所需要的命令行工具和程序库

virt-manager GUI虚拟机管理工具

virt-top 虚拟机统计命令

virt-viewer GUI连接程序，连接到已配置好的虚拟机

libvirt C语言工具包，提供libvirt服务

libvirt-client 为虚拟客户机提供的C语言工具包

virt-install 基于libvirt服务的虚拟机创建命令

bridge-utils 创建和管理桥接设备的工具

INSTALL

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[root@localhost ~]# yum install qemu-kvm libvirt virt-install bridge-utils

#查看是否加载kvm模块

[root@kvm ~]# lsmod|grep kvm

kvm_intel             138567  0

kvm                   441119  1 kvm_intel

#如果没有这两条，可以用"modprobe kvm"加载；

#相关命令"insmod;rmmod;modinfo"

#启动libvirtd

[root@localhost ~]# systemctl start libvirtd;systemctl enable libvirtd

[root@localhost ~]# systemctl list-unit-files|grep libvirtd

libvirtd.service                            enabled

NETWORK CONFIGURATION

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#修改网卡文件eno16777736

[root@kvm ~]# cd /etc/sysconfig/network-scripts/

[root@kvm network-scripts]# echo "BRIDGE=br0" >> ifcfg-eno16777736   #在ifcfg-e**原网卡文件中增加"BRIDGE=br0"

#新建网桥文件ifcfg-br0(网桥名称),增加内容如下

[root@kvm network-scripts]# vi ifcfg-br0

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

DEVICE=br0                                           

TYPE="Bridge"                                       #大小写敏感，所以必须是Bridge

BOOTPROTO="dhcp"

ONBOOT="yes"

DELAY="0"

STP="yes"                                                #这一行是来启动STP,和brctl命令行出来的结果有关

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

#重启NetworkManager及network服务：

[root@kvm network-scripts]# systemctl restart NetworkManager

#当你手动修改了网卡文件后，需要重启NetworkManager服务来重新接管网络配置

#网卡配置文件和NetworkManager配置冲突时，解决方案:｛1、重启NetworkManager;2、关闭NetworkManager｝

[root@kvm network-scripts]# systemctl restart network

[root@kvm 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 brd 00:00:00:00:00:00

    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 1500 qdisc pfifo_fast master br0 state UP qlen 1000

    link/ether 00:0c:29:61:5c:1d brd ff:ff:ff:ff:ff:ff

3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN

    link/ether 52:54:00:b6:45:5b brd ff:ff:ff:ff:ff:ff

    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0

       valid_lft forever preferred_lft forever

4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 500

    link/ether 52:54:00:b6:45:5b brd ff:ff:ff:ff:ff:ff

6: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP

    link/ether 00:0c:29:61:5c:1d brd ff:ff:ff:ff:ff:ff

    inet 192.168.0.32/24 brd 192.168.0.255 scope global dynamic br0

       valid_lft 11979sec preferred_lft 11979sec

    inet6 fe80::20c:29ff:fe61:5c1d/64 scope link

       valid_lft forever preferred_lft forever

7: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UNKNOWN qlen 500

    link/ether fe:54:00:cb:63:b2 brd ff: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

[root@kvm 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，这里就会显示no

br0             8000.000c29615c1d       yes             eno16777736

                                                                                 vnet0

virbr0          8000.525400b6455b       yes             virbr0-nic

CLOSE SELINUX

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[root@kvm network-scripts]# setenforce 0

[root@kvm network-scripts]# getenforce

Permissive

[root@kvm 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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[root@kvm ~]# mkdir -p /var/kvm/images

[root@kvm ~]# virt-install \

--network bridge:br0 \

--name vm1 \

--ram=1024 \

--vcpus=1 \

--disk path=/var/kvm/images/vm1.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"

#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 还是vnc,选择textmode继续安装吧

#如果网络会有问题的话，尽量选择用--cdrom /path/to/centos7.iso

#virt-install --name vm1 --ram=1024 --vcpus=1 --network bridge:br0 --disk path=/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:图形化下安装虚拟机需要X-WINDOW和virt-manager，安装虚拟机之前的操作都一样，图形下操作很简单

扩展资料

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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

本文出自 “三零妖人” 博客，请务必保留此出处http://301ren.blog.51cto.com/8887653/1631133

Centos7-KVM Installation

标签：linux   kvm   centos   

原文地址：http://301ren.blog.51cto.com/8887653/1631133