虚拟机创建网卡与硬盘

qemu-img create -f qcow2 disk.img 20G

[root@rootroom9pc01 qemu]# cat node3.xml

<domain type='kvm'>
<name>node3</name>
<uuid>b8062f75-48c0-433a-86b3-f7709346f413</uuid>
<memory unit='KiB'>2048000</memory>
<currentMemory unit='KiB'>2048000</currentMemory>
<vcpu placement='static'>2</vcpu>
<os>
<type arch='x86_64' machine='pc-i440fx-rhel7.0.0'>hvm</type>
<boot dev='hd'/>
<bootmenu enable='yes'/>
<bios useserial='yes'/>
</os>
<features>
<acpi/>
<apic/>
</features>
<cpu mode='host-passthrough' check='none'/>
<clock offset='localtime'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/var/lib/libvirt/images/node3.img'/>
<target dev='vda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</disk>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/var/lib/libvirt/images/disk.img'/>
<target dev='vdb' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
</disk>
<controller type='usb' index='0' model='piix3-uhci'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<controller type='virtio-serial' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:fe:0b:e5'/>
<source bridge='vbr'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<interface type='bridge'>
<mac address='52:54:00:49:4c:11'/>
<source bridge='private1'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</interface>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<channel type='unix'>
<target type='virtio' name='org.qemu.guest_agent.0'/>
<address type='virtio-serial' controller='0' bus='0' port='1'/>
</channel>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
</memballoon>
</devices>
</domain>

[root@rootroom9pc01 networks]# cat private1.xml

<!--

WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE

OVERWRITTEN AND LOST. Changes to this xml configuration should be made using:

virsh net-edit private1

or other application using the libvirt API.

-->

<name>private1</name>

<dhcp>

</dhcp>

</ip>

</network>

[root@rootroom9pc01 networks]# cd ../

[root@rootroom9pc01 qemu]# ls

demo.xml networks node1.xml node3.xml win2008.xml

Poweroff -p

[root@localhost ~]# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

vda 253:0 0 30G 0 disk

└─vda1 253:1 0 16G 0 part /

[root@rootroom9pc01 images]# virsh

欢迎使用 virsh，虚拟化的交互式终端。

输入：'help' 来获得命令的帮助信息

'quit' 退出

virsh # edit node3

</disk>

[root@localhost ~]# halt -p

virsh # start node3

域 node3 已开始

virsh # console node3

连接到域 node3

换码符为 ^]

CentOS Linux 7 (Core)

Kernel 3.10.0-693.el7.x86_64 on an x86_64

localhost login: root

Password:

Last login: Fri Jul 20 15:41:11 on ttyS0

[root@localhost ~]# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

vda 253:0 0 30G 0 disk

└─vda1 253:1 0 16G 0 part /

vdb 253:16 0 20G 0 disk

Ctril+l

exit

电脑内存是TG>GB>MB>KB>K 1TG=1024GB 1GB=1024MB 1MB=1024KB 1KB=1024K 1K=1024B 1B = 8bit 一个中文2个字节一个英文为1个字节

1KB=10^3=1000, 1MB=10^6=1000000=1000KB,1GB=10^9=1000000000=1000MB,而 1KiB=2^10=1024,1MiB=2^20=1048576=1024KiB

虚拟机创建网卡与硬盘

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