KVM调整cpu和内存

1一.修改kvm虚拟机的配置
2
31、virsh edit centos7   
4
5找到“memory”和“vcpu”标签，将
6
7<name>centos7</name>
8
9  <uuid>2220a6d1-a36a-4fbb-8523-e078b3dfe795</uuid>
10
11  <memory unit='KiB'>2097152</memory>
12
13  <currentMemory unit='KiB'>2097152</currentMemory>
14
15  <vcpu placement='static'>1</vcpu>
16
17改为：
18
19<name>centos7</name>
20
21  <uuid>2220a6d1-a36a-4fbb-8523-e078b3dfe795</uuid>
22
23  <memory unit='KiB'>3145728</memory>
24
25  <currentMemory unit='KiB'>3145728</currentMemory>
26
27  <vcpu placement='static'>2</vcpu>

 重定义使配置生效

virsh define /etc/libvirt/qemu/centos7.xml

启动虚拟机

virsh start centos7

调整前虚拟机信息

1[root@localhost kvm]# virsh dominfo centos7
2Id:             -
3Name:           centos7
4UUID:           2220a6d1-a36a-4fbb-8523-e078b3dfe795
5OS Type:        hvm
6State:          shut off
7CPU(s):         1
8Max memory:     2097152 KiB
9Used memory:    2097152 KiB
10Persistent:     yes
11Autostart:      disable
12Managed save:   no
13Security model: none
14Security DOI:   0

调整后虚拟机信息

1[root@localhost kvm]# virsh dominfo centos7
2Id:             -
3Name:           centos7
4UUID:           2220a6d1-a36a-4fbb-8523-e078b3dfe795
5OS Type:        hvm
6State:          shut off
7CPU(s):         2
8Max memory:     3145728 KiB
9Used memory:    3145728 KiB
10Persistent:     yes
11Autostart:      disable
12Managed save:   no
13Security model: none
14Security DOI:   0