8 kvm調整CPU 內存 網卡

# virsh  edit centos6.8

1 調整內存大小，要改變最大值和當前值

<memory unit='KiB'>524288</memory>

<currentMemory unit='KiB'>524288</currentMemory>

2 調整CPU核數

<vcpu placement='static'>1</vcpu>

查看調整後的參數

# free 

# grep -i processor /proc/cpuinfo

processor    : 0

processor    : 1

3 調整網卡

3.1 查看網卡

# virsh domiflist centos6.8

Interface  Type       Source     Model       MAC

-------------------------------------------------------

vnet0      bridge     br0        virtio      52:54:00:a6:4b:c9

3.2 增長網卡

# virsh attach-interface centos6.8 --type bridge --source br0

# virsh domiflist centos6.8

Interface  Type       Source     Model       MAC

-------------------------------------------------------

vnet0      bridge     br0        virtio      52:54:00:a6:4b:c9

vnet1      bridge     br0        -           52:54:00:a9:4c:12

3.3 修改虛擬機配置文件

    經過virsh dump能夠看到網卡的配置。但還沒寫入配置文件，此處將其寫入配置文件，若不寫入，重啓虛擬機後，網卡將消失

# virsh dumpxml centos6.8 > /etc/libvirt/qemu/centos6.8.xml

4 啓動虛擬機

# ifconfig -a

---

5 亦能夠經過

# virsh edit centos6.8 來修改配置文件

    <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'/>

# 刪除此行

#     <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>

    </interface>

來自爲知筆記(Wiz)