kvm调整CPU 内存 网卡
# virshedit centos6.81 调整内存大小，要改变最大值和当前值
<memory unit='KiB'>524288</memory>
<currentMemory unit='KiB'>524288</currentMemory>
2 调整CPU核数
<vcpu placement='static'>1</vcpu>
查看调整后的参数
# free
# grep -i processor /proc/cpuinfo
processor : 0
processor : 1
3 调整网卡
3.1 查看网卡
# virsh domiflist centos6.8
InterfaceType Source Model MAC
-------------------------------------------------------
vnet0 bridge br0 virtio 52:54:00:a6:4b:c9
3.2 增加网卡
# virsh attach-interface centos6.8 --type bridge --source br0
# virsh domiflist centos6.8
InterfaceType Source Model MAC
-------------------------------------------------------
vnet0 bridge br0 virtio 52:54:00:a6:4b:c9
vnet1 bridge br0 - 52:54:00:a9:4c:12
3.3 修改虚拟机配置文件
通过virsh dump可以看到网卡的配置。但还没写入配置文件，此处将其写入配置文件，若不写入，重启虚拟机后，网卡将消失
# virsh dumpxml centos6.8 > /etc/libvirt/qemu/centos6.8.xml
4 启动虚拟机
# ifconfig -a
5 亦可以通过
# virsh edit centos6.8 来修改配置文件
<interface type='bridge'>
<mac address='52:54:00:a6:4b:c9'/>
<source bridge='br0'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<interface type='bridge'>
<mac address='52:54:00:a6:4b:c8'/>
<source bridge='br0'/>
<model type='virtio'/>
# 删除此行
# <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
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