准备：
Centos7的虚拟机，虚拟机镜像文件
1.KVM的安装
[[email protected] ~]# yum -y install qemu-kvm libvirt libguestfs-tools virt-manager libvirt-python
qemu-kvm #kvm的主程序，KVM虚拟化模块
virt-manager #KVM 图形化管理工具
libvirt #虚拟化服务
libguestfs-tools #虚拟机的系统管理工具
libvirt-python #python调用libvirt虚拟化服务的api接口库文件
[[email protected] ~]# systemctl start libvirtd #开启虚拟化服务
[[email protected] ~]# systemctl enable libvirtd #添加到开机自启动确定正确加载kvm
[[email protected] ~]# lsmod | grep kvm
kvm_intel 174841 3
kvm 578518 1 kvm_intel
irqbypass 13503 3 kvm配置KVM的网桥
作用：用于连接用以网段内的所有机器，也就是让客户机和宿主机共享一个物理网络设备。
1. 编辑配置文件：
[[email protected] ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens33
UUID=80960b0d-54cd-41db-bb42-28d30da2afa4
DEVICE=ens33
ONBOOT=yes
BRIDGE="br0" //添加这一行，如果配置过静态ip，需要把ipaddr，gateway，netmask，dns配置删除
`
2.添加文件：
[[email protected] ~]# vim /etc/sysconfig/network-scripts/ifcfg-br0
DEVICE="br0"
NM_CONTROLLED="yes"
ONBOOT="yes"
TYPE="Bridge"
BOOTPROTO=dhcp #这里也可以设置成静态IP
[[email protected] ~]# systemctl restart network查看当前ip
[[email protected] ~]# ifconfig
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.10.13 netmask 255.255.255.0 broadcast 192.168.10.255
inet6 fe80::20c:29ff:febe:8be8 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:be:8b:e8 txqueuelen 1000 (Ethernet)
RX packets 1109336 bytes 4514990433 (4.2 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 984697 bytes 53197602 (50.7 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether 00:0c:29:be:8b:e8 txqueuelen 1000 (Ethernet)
RX packets 3280291 bytes 4647765745 (4.3 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 984898 bytes 59123703 (56.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
ether 52:54:00:67:94:c0 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
vnet0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::fc54:ff:fed1:8167 prefixlen 64 scopeid 0x20<link>
ether fe:54:00:d1:81:67 txqueuelen 1000 (Ethernet)
RX packets 85 bytes 7298 (7.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 731 bytes 62680 (61.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0查看桥接信息
[[email protected] ~]# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.000c29be8be8 no ens33
vnet0
virbr0 8000.5254006794c0 yes virbr0-nic创建一台KVM的虚拟机：
如果硬盘容量足够大，跳过这一步：
1. 首先，添加一块一盘，
2. 刷新
for((i=0;i<=2;i++)); do echo "- - -" > /sys/class/scsi_host/host$i/scan done
3. 刷新后lsblk看看硬盘个数是否添加成功；
4. 分区： fdisk 添加了一个sdb1的分区
5. 格式化：mkfs.xfs /dev/sdb1
6. 挂载分区： mount /dev/sdb1 /var/lib/libvrit/image
这里就结束了
上传iso镜像到/var/lib/libvirt/image下面，随便放到哪儿，但是不要放到含有特殊权限的目录下。
运行virt-manager启动虚拟服务
[[email protected] ~]# virt-manager
文件-----添加新的虚拟机---------本地安装介质---------使用镜像（刚才上传镜像的位置）------一直默认下去--------开机直接安装即可（安装时候和vmware一样）
注意：在选择网络的时候选择刚才创建好的br0桥接网络即可安装KVM虚拟机完成
KVM常用命令：
[[email protected] ~]# virsh list 列出正在运行的虚拟机
[[email protected] ~]# virsh start centos7 #开启物理机
[[email protected] ~]# virsh shoutdown centos7 #关闭物理机
[[email protected] ~]# virsh autostart centos7 #设置为物理开机后自动启动原文地址：http://blog.51cto.com/13155409/2124689
时间： 2024-08-19 05:18:10