KVM virtual machine Basic management and common commands

Basic management of KVM

1. View the KVM virtual machine configuration file

#Kvm虚拟机默认配置文件位置 [[email protected] qemu]# pwd/etc/libvirt/Qemu[[email protected] qemu]# lltotal A-RW-------1Root root3863Nov6  -: -CentOS6.5. XML-RW-------1Root root3771Nov7 xx: $Centos6u7.xml-RW-------1Root root3628Nov7  Geneva:Genevacentos.xmldrwx------3Root root +Nov7 xx: $Networks

2 Start and close

 #显示正在运行的虚拟机[[email protected]~]# virsh list Id Name state---------------------------------------------------- #显示所有虚拟机[[email protected]~]# Virsh List--All Id the Name state---------------------------------------------------- -CentOS shut off-CentOS6.5shut off-Centos6u7 shut off#启动名字为CentOS6.5 virtual machines [email protected]~]# Virsh start CentOS6.5 #关闭名字为CentOS6.5 virtual machines [email protected]~]# Virsh shutdown CentOS6.5 #强制关闭名字为Centos6.5 virtual machines [email protected]~]# Virsh destroy CentOS6.5 #移除名字为CentOS6.5 virtual machines [email protected]~]# Virsh undefine CentOS6.5 #设置CentOS6.5 Virtual machine boot up [[email protected]~]# Virsh autostart CentOS6.5 #默认情况下virsh工具不能对linux虚拟机进行关机操作 #linux操作系统需要开启与启动acpid服务. This service must be configured on the installation of a KVM Linux virtual machine . # yum-y install acpid#/etc/init.d/acpid start

3 Starting a virtual machine from a configuration file

[Email protected] ~]# Virsh CREATE/ETC/LIBVIRT/QEMU/CENTOS6. 5. xml

4 Other (hang, resume) Virsh commands

#挂起服务器 [Email protected] qemu]# Virsh suspend CentOS6. 5  #恢复服务器[[email protected] qemu]# Virsh resume CentOS6. 5

5 Renaming a virtual machine

1, stop the virtual machine [[email protected] qemu]# Virsh shutdown centos6u51, export the virtual machine's configuration file [[email protected] qemu]# pwd/etc/libvirt/Qemu[[email protected] Qemu-img]# Virsh dumpxml centos6u5 > test-Centos6u5.xml2change configuration file [[email protected] qemu]# sed-I.'s/centos6u5/test-centos6u5/g'test-centos6u5.xml# Note You can not change the image name3Remove the original virtual machine [[email protected] qemu]# Virsh undefine centos6u54load new virtual machine [[email protected] qemu]# Virsh define test-Centos6u5.xml5start virtual machine [[email protected] qemu]# virsh start test-centos6u5

6 Virtual Machine Snapshot creation

1Convert disk image File format to Qcow2[[email protected]~]# Virsh shutdown test-Centos6u5[[email protected] Qemu-img]# qemu-img convert-f Raw Centos6u5.raw-O qcow2 CentOS6u5.raw.qcow2 snapshots must be in the QCOW2 format. I'll start with a new virtual machine to Qcow22create snapshot [[email protected] QEMU-img]# Virsh snapshot-Create Centos6u53view snapshot [[email protected] QEMU-img]# Virsh snapshot-list Centos6u5 Name Creation time State------------------------------------------------------------1479043349            .- One- -  ,: A: in-0500shutoff4restore snapshot [[email protected] QEMU-img]# Virsh Snapshot-revert Centos6u514790433495delete snapshot [[email protected] QEMU-img]# Virsh Snapshot-delete Centos6u51479043349

KVM virtual machine Basic management and common commands