#Centos7.4#Linux虚拟机KVM配置CPU、内存

【修改kvm虚拟机的资源大小cpu、内存、硬盘】

# virsh list --all 

Id    Name         State
-------------------------------------------------
-     bbotte       shut off 
   
# virsh setvcpus bbotte --maximum 4 --config
# virsh setmaxmem bbotte 1048576 --config

# virsh dominfo bbotte
Id:             2
Name:           bbotte
UUID:           bd22f444-ee7f-7f00-3d1b-1bb0d0857e43
OS Type:        hvm
State:          running
CPU(s):         4
CPU time:       152.3s
Max memory:     1048576 KiB
Used memory:    524288 KiB
Persistent:     yes
Autostart:      disable
Managed save:   no
Security model: none
Security DOI:   0
   ####修改xml配置文件###

1、virsh edit centos73 （更改前要将virsh shutdown centos73 ）
找到“memory”和“vcpu”标签，将
<name>centos73</name>
  <uuid>2220a6d1-a36a-4fbb-8523-e078b3dfe795</uuid>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <vcpu placement='static'>1</vcpu>
改为：
<name>centos73</name>
  <uuid>2220a6d1-a36a-4fbb-8523-e078b3dfe795</uuid>
  <memory unit='KiB'>3145728</memory>
  <currentMemory unit='KiB'>3145728</currentMemory>
  <vcpu placement='static'>2</vcpu>
 
 virsh define /etc/libvirt/qemu/centos73.xml    重定义使配置生效    
重启虚拟机
virsh start centos73 --console
查看原配置信息

 
[root@localhost kvm]# virsh dominfo centos734
Id:             -
Name:           centos73
UUID:           2220a6d1-a36a-4fbb-8523-e078b3dfe795
OS Type:        hvm
State:          shut off
CPU(s):         1
Max memory:     2097152 KiB
Used memory:    2097152 KiB
Persistent:     yes
Autostart:      disable
Managed save:   no
Security model: none
Security DOI:   0
调整后信息：
[root@localhost kvm]# virsh dominfo centos73
Id:             -
Name:           centos73
UUID:           2220a6d1-a36a-4fbb-8523-e078b3dfe795
OS Type:        hvm
State:          shut off
CPU(s):         2
Max memory:     3145728 KiB
Used memory:    3145728 KiB
Persistent:     yes
Autostart:      disable
Managed save:   no
Security model: none
Security DOI:   0

参考连接：

https://blog.csdn.net/hnhuangyiyang/article/details/50902223