PRE-INSTALLpython
=============================================================linux
kvm相關安裝包及其做用centos
qemu-kvm 主要的KVM程序包網絡
python-virtinst 建立虛擬機所須要的命令行工具和程序庫工具
virt-manager GUI虛擬機管理工具oop
virt-top 虛擬機統計命令centos7
virt-viewer GUI鏈接程序，鏈接到已配置好的虛擬機spa
libvirt C語言工具包，提供libvirt服務.net
libvirt-client 爲虛擬客戶機提供的C語言工具包命令行
virt-install 基於libvirt服務的虛擬機建立命令
bridge-utils 建立和管理橋接設備的工具
INSTALL
=============================================================
[root@localhost ~]# yum install qemu-kvm libvirt virt-install bridge-utils
#查看是否加載kvm模塊
[root@kvm ~]# lsmod|grep kvm
kvm_intel 138567 0
kvm 441119 1 kvm_intel
#若是沒有這兩條，能夠用"modprobe kvm"加載；
#相關命令"insmod;rmmod;modinfo"
#啓動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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#修改網卡文件eno16777736
[root@kvm ~]# cd /etc/sysconfig/network-scripts/
[root@kvm network-scripts]# echo "BRIDGE=br0" >> ifcfg-eno16777736 #在ifcfg-e**原網卡文件中增長"BRIDGE=br0"
#新建網橋文件ifcfg-br0(網橋名稱),增長內容以下
[root@kvm network-scripts]# vi ifcfg-br0
*************************************************
DEVICE=br0
TYPE="Bridge" #大小寫敏感，因此必須是Bridge
BOOTPROTO="dhcp"
ONBOOT="yes"
DELAY="0"
STP="yes" #這一行是來啓動STP,和brctl命令行出來的結果有關
*************************************************
#重啓NetworkManager及network服務：
[root@kvm network-scripts]# systemctl restart NetworkManager
#當你手動修改了網卡文件後，須要重啓NetworkManager服務來從新接管網絡配置
#網卡配置文件和NetworkManager配置衝突時，解決方案:｛一、重啓NetworkManager;二、關閉NetworkManager｝
[root@kvm network-scripts]# systemctl restart network
[root@kvm network-scripts]# ip a #ip命令用來查看和管理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
#查看網橋鏈接
[root@kvm network-scripts]# brctl show #brctl是一個網橋鏈接管理命令
bridge name bridge id STP enabled interfaces #若是上面不設置STP=yes，這裏就會顯示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"
#詳細每一個參數的意義能夠查看擴展資料
#安裝過程會讓你選擇textmode 仍是vnc,選擇textmode繼續安裝吧
#若是網絡會有問題的話，儘可能選擇用--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:圖形化下安裝虛擬機須要X-WINDOW和virt-manager，安裝虛擬機以前的操做都同樣，圖形下操做很簡單
擴展資料
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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，請務必保留此出處http://301ren.blog.51cto.com/8887653/1631133
