virsh所有的命令
Domain Management (help keyword 'domain'): attach-device attach device from an XML file attach-disk attach disk device attach-interface attach network interface autostart autostart a domain blkdeviotune Set or query a block device I/O tuning parameters. blkiotune Get or set blkio parameters blockcommit Start a block commit operation. blockcopy Start a block copy operation. blockjob Manage active block operations blockpull Populate a disk from its backing image. blockresize Resize block device of domain. change-media Change media of CD or floppy drive console connect to the guest console cpu-baseline compute baseline CPU cpu-compare compare host CPU with a CPU described by an XML file cpu-stats show domain cpu statistics create create a domain from an XML file define define (but don't start) a domain from an XML file desc show or set domain's description or title destroy destroy (stop) a domain detach-device detach device from an XML file detach-disk detach disk device detach-interface detach network interface domdisplay domain display connection URI domfstrim Invoke fstrim on domain's mounted filesystems. domhostname print the domain's hostname domid convert a domain name or UUID to domain id domif-setlink set link state of a virtual interface domiftune get/set parameters of a virtual interface domjobabort abort active domain job domjobinfo domain job information domname convert a domain id or UUID to domain name dompmsuspend suspend a domain gracefully using power management functions dompmwakeup wakeup a domain from pmsuspended state domuuid convert a domain name or id to domain UUID domxml-from-native Convert native config to domain XML domxml-to-native Convert domain XML to native config dump dump the core of a domain to a file for analysis dumpxml domain information in XML edit edit XML configuration for a domain inject-nmi Inject NMI to the guest send-key Send keycodes to the guest send-process-signal Send signals to processes lxc-enter-namespace LXC Guest Enter Namespace managedsave managed save of a domain state managedsave-remove Remove managed save of a domain maxvcpus connection vcpu maximum memtune Get or set memory parameters migrate migrate domain to another host migrate-setmaxdowntime set maximum tolerable downtime migrate-compcache get/set compression cache size migrate-setspeed Set the maximum migration bandwidth migrate-getspeed Get the maximum migration bandwidth mc-disable disable mc migration for domain numatune Get or set numa parameters qemu-attach QEMU Attach qemu-monitor-command QEMU Monitor Command qemu-agent-command QEMU Guest Agent Command qemu-agent-command2 QEMU Guest Agent Command reboot reboot a domain reset reset a domain restore restore a domain from a saved state in a file resume resume a domain save save a domain state to a file save-image-define redefine the XML for a domain's saved state file save-image-dumpxml saved state domain information in XML save-image-edit edit XML for a domain's saved state file schedinfo show/set scheduler parameters screenshot take a screenshot of a current domain console and store it into a file setmaxmem change maximum memory limit setmem change memory allocation setvcpus change number of virtual CPUs shutdown gracefully shutdown a domain start start a (previously defined) inactive domain suspend suspend a domain ttyconsole tty console undefine undefine a domain update-device update device from an XML file vcpucount domain vcpu counts vcpuinfo detailed domain vcpu information vcpupin control or query domain vcpu affinity emulatorpin control or query domain emulator affinity vncdisplay vnc display Domain Monitoring (help keyword 'monitor'): domblkerror Show errors on block devices domblkinfo domain block device size information domblklist list all domain blocks domblkstat get device block stats for a domain domcontrol domain control interface state domif-getlink get link state of a virtual interface domiflist list all domain virtual interfaces domifstat get network interface stats for a domain dominfo domain information dommemstat get memory statistics for a domain domstate domain state list list domains Host and Hypervisor (help keyword 'host'): capabilities capabilities freecell NUMA free memory hostname print the hypervisor hostname node-memory-tune Get or set node memory parameters nodecpumap node cpu map nodecpustats Prints cpu stats of the node. nodeinfo node information nodememstats Prints memory stats of the node. nodesuspend suspend the host node for a given time duration sysinfo print the hypervisor sysinfo uri print the hypervisor canonical URI version show version Interface (help keyword 'interface'): iface-begin create a snapshot of current interfaces settings, which can be later committed (iface-commit) or restored (iface-rollback) iface-bridge create a bridge device and attach an existing network device to it iface-commit commit changes made since iface-begin and free restore point iface-define define (but don't start) a physical host interface from an XML file iface-destroy destroy a physical host interface (disable it / "if-down") iface-dumpxml interface information in XML iface-edit edit XML configuration for a physical host interface iface-list list physical host interfaces iface-mac convert an interface name to interface MAC address iface-name convert an interface MAC address to interface name iface-rollback rollback to previous saved configuration created via iface-begin iface-start start a physical host interface (enable it / "if-up") iface-unbridge undefine a bridge device after detaching its slave device iface-undefine undefine a physical host interface (remove it from configuration) Network Filter (help keyword 'filter'): nwfilter-define define or update a network filter from an XML file nwfilter-dumpxml network filter information in XML nwfilter-edit edit XML configuration for a network filter nwfilter-list list network filters nwfilter-undefine undefine a network filter Networking (help keyword 'network'): net-autostart autostart a network net-create create a network from an XML file net-define define (but don't start) a network from an XML file net-destroy destroy (stop) a network net-dumpxml network information in XML net-edit edit XML configuration for a network net-info network information net-list list networks net-name convert a network UUID to network name net-start start a (previously defined) inactive network net-undefine undefine an inactive network net-update update parts of an existing network's configuration net-uuid convert a network name to network UUID Node Device (help keyword 'nodedev'): nodedev-create create a device defined by an XML file on the node nodedev-destroy destroy (stop) a device on the node nodedev-detach detach node device from its device driver nodedev-dumpxml node device details in XML nodedev-list enumerate devices on this host nodedev-reattach reattach node device to its device driver nodedev-reset reset node device Secret (help keyword 'secret'): secret-define define or modify a secret from an XML file secret-dumpxml secret attributes in XML secret-get-value Output a secret value secret-list list secrets secret-set-value set a secret value secret-undefine undefine a secret Snapshot (help keyword 'snapshot'): snapshot-create Create a snapshot from XML snapshot-create-as Create a snapshot from a set of args snapshot-current Get or set the current snapshot snapshot-delete Delete a domain snapshot snapshot-dumpxml Dump XML for a domain snapshot snapshot-edit edit XML for a snapshot snapshot-info snapshot information snapshot-list List snapshots for a domain snapshot-parent Get the name of the parent of a snapshot snapshot-revert Revert a domain to a snapshot Storage Pool (help keyword 'pool'): find-storage-pool-sources-as find potential storage pool sources find-storage-pool-sources discover potential storage pool sources pool-autostart autostart a pool pool-build build a pool pool-create-as create a pool from a set of args pool-create create a pool from an XML file pool-define-as define a pool from a set of args pool-define define (but don't start) a pool from an XML file pool-delete delete a pool pool-destroy destroy (stop) a pool pool-dumpxml pool information in XML pool-edit edit XML configuration for a storage pool pool-info storage pool information pool-list list pools pool-name convert a pool UUID to pool name pool-refresh refresh a pool pool-start start a (previously defined) inactive pool pool-undefine undefine an inactive pool pool-uuid convert a pool name to pool UUID Storage Volume (help keyword 'volume'): vol-clone clone a volume. vol-create-as create a volume from a set of args vol-create create a vol from an XML file vol-create-from create a vol, using another volume as input vol-delete delete a vol vol-download download volume contents to a file vol-dumpxml vol information in XML vol-info storage vol information vol-key returns the volume key for a given volume name or path vol-list list vols vol-name returns the volume name for a given volume key or path vol-path returns the volume path for a given volume name or key vol-pool returns the storage pool for a given volume key or path vol-resize resize a vol vol-upload upload file contents to a volume vol-wipe wipe a vol Virsh itself (help keyword 'virsh'): cd change the current directory connect (re)connect to hypervisor echo echo arguments exit quit this interactive terminal help print help pwd print the current directory quit quit this interactive terminal
virsh 常用命令
1.virsh# list --all 所有KVM上承载的虚拟机 包括开机和关机的
2.virsh# dominfo 虚拟机的常规信息（CPU 内存规格 内存使用情况）
virsh命令管理虚拟机
libvirt有两种控制方式，命令行和图形界面。
1.图形界面：通过执行名virt-manager，启动libvirt的图形界面，在图形界面下可以一步一步的创建虚拟机，管理虚拟机，还可以直接控制虚拟机的桌面。
2.命令行就是接下来我所说的。如何通过命令行来控制虚拟机。
创建虚拟机
在/etc/libvirt/qemu下新建xml文件，如node.xml。需要有内存、cpu、硬盘设置、光驱以及vnc等等。以下是我根据Openstack启的虚机修改而成，没办法，直接用Openstack的文件启动虚机会失败的，网桥不兼容什么的原因，具体的我忘了，原谅我那只有7秒钟的记忆吧~代码贴到下面了：
1 <domain type='qemu'> 2 <name>node3</name> 3 <uuid>84b31010-6124-4529-baf9-bae25e18d933</uuid> 4 <memory unit='KiB'>524288</memory> 5 <currentMemory unit='KiB'>524288</currentMemory> 6 <vcpu placement='static'>1</vcpu> 7 <sysinfo type='smbios'> 8 <system> 9 <entry name='manufacturer'>Red Hat Inc.</entry> 10 <entry name='product'>OpenStack Nova</entry> 11 <entry name='version'>2014.1.1-2.el6</entry> 12 <entry name='serial'>421c7a3a-7f61-cde9-13cb-8b5804fc62cc</entry> 13 <entry name='uuid'>84b31010-6124-4529-baf9-bae25e18d933</entry> 14 </system> 15 </sysinfo> 16 <os> 17 <type arch='x86_64' machine='rhel6.5.0'>hvm</type> 18 <boot dev='hd'/> //硬盘启动 19 <smbios mode='sysinfo'/> 20 </os> 21 <features> 22 <acpi/> 23 <apic/> 24 </features> 25 <cpu mode='host-model'> 26 <model fallback='allow'/> 27 </cpu> 28 <clock offset='utc'/> 29 <on_poweroff>destroy</on_poweroff> 30 <on_reboot>restart</on_reboot> 31 <on_crash>destroy</on_crash> 32 <devices> 33 <emulator>/usr/libexec/qemu-kvm</emulator> 34 <controller type='usb' index='0'> 35 <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> 36 </controller> 37 <memballoon model='virtio'> 38 <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> 39 </memballoon> 40 </devices> 41 </domain> View Code
代码分析：
1.<domain type='kvm'> 域类型，也可以是xen
2.<name>node3</name> 虚拟机的名字
3.<memory unit='KiB'>524288</memory> 虚拟机的最大内存
4.<currentMemory unit='KiB'>524288</currentMemory> 虚拟机当前的内存
5.<vcpu>2</vcpu> 该虚拟机的cpu数
6.<boot dev='hd'/> hd表示从硬盘启动，cdrom表示从光盘启动
7.<type arch='x86_64' machine='rhel6.5.0'>hvm</type> 表示全虚拟化
其实还有好多其他的属性：
1.<console type='pty'> console用来代表交互性的控制台
2.<interface type='bridge'> 网桥
3.<source bridge='virbr0'/> 网桥名
4.<mac address='00:16:36:1e:1d:04'/> MAC地址
5.<graphics type='vnc' autoport='yes' keymap='en-us'/> 图形类型
编辑之后就可以保存退出了。
启动虚拟机
1 virsh define /etc/libvirt/qemu/node3.xml 2 virsh start node3
第一行命令就是创建定义也就是创建一个虚拟机。第二行就是启动刚刚创建的虚拟机，如果启动成功，可以使用命令
1 virsh list
查看刚刚启动的虚拟机。
迁移虚拟机
在进行迁移之前，需要先配置一下你的两台物理机，具体配置方法请移步 Openstack虚拟机热迁移 ，然后参照此文进行配置。
配置完成后先使用命令行
1 virsh -c qemu+ssh://ip/system
进行测试，如果可以进入virsh然后可以进行如下的命令进行迁移：
1 virsh migrate --live qemu+ssh://ip/system --unsafe
其它操作
virsh start x 启动名字为x的非活动虚拟机
virsh create x.xml 创建虚拟机（创建后，虚拟机立即执行，成为活动主机）
virsh suspend x 暂停虚拟机
virsh resume x 启动暂停的虚拟机
virsh shutdown x 正常关闭虚拟机
virsh destroy x 强制关闭虚拟机
virsh dominfo x 显示虚拟机的基本信息
virsh domname 2 显示id号为2的虚拟机名
virsh domid x 显示虚拟机id号
virsh domuuid x 显示虚拟机的uuid
virsh domstate x 显示虚拟机的当前状态
virsh dumpxml x 显示虚拟机的当前配置文件（可能和定义虚拟机时的配置不同，因为当虚拟机启动时，需要给虚拟机分配id号、uuid、vnc端口号等等）
virsh setmem x 512000 给不活动虚拟机设置内存大小
virsh edit x 编辑配置文件（一般是在刚定义完虚拟机之后）
PS:本博客欢迎转发，但请注明博客地址及作者~
博客地址： http://www.cnblogs.com/voidy/
<。)#)))≦