libvirt frequently used commands summary virsh

libvirt frequently used commands summary virsh

Let's summarize the frequently used commands for handling QEMU virtual machines with libvirt.

Virsh define

This command adds a virtual machine defined in libvirt Domain XML Format ( https://libvirt.org/formatdomain.html ) to libvirt.
virsh define [libvirt 도메인 정의 xml 파일 경로]

Virsh start

startUse to start a virtual machine .
virsh start [가상머신도메인 이름]

View virtual machine list virsh list

You can see the list of added virtual machines.
virsh list --all

Virsh delete

You can delete the added virtual machine.
virsh delete [snapshot name]

Pause / resume virtual machine virsh suspend, resume

Use to pause the virtual machine suspend.
virsh suspend [snapshot name]
resumeUse to resume a paused virtual machine .
virsh resume [snapshot name]

Turn off the virtual machine virsh destroy

Use to terminate the virtual machine you destroywere using.
virsh destroy [snapshot name]

Create a virtual machine snapshot virsh snapshot-create-as

snapshot-create-asUse to create a snapshot of the virtual machine .
virsh snapshot-create-as --domain  [domain] [snapshot name]
Here is an example:
virsh snapshot-create-as --domain win10 snapshot1

Checking virtual machine snapshot list virsh snapshot-list

snapshot-listUse to check the snapshot list of the created virtual machine .
virsh snapshot-list --domain [snapshot name]
Here is an example:
virsh snapshot-list --domain win10

Restore virtual machine snapshot virsh snapshot-revert

snapshot-revertUse to restore the virtual machine to the specified snapshot state .
virsh snapshot-revert  [domain] [snapshot name]
Here is an example:
virsh snapshot-revert win10 snapshot1

Delete virtual machine snapshot virsh snapshot-delete

snapshot-deleteUse to delete the snapshot of the created virtual machine .
virsh snapshot-delete --domain [domain] [snapshot name]
Here is an example:
virsh snapshot-delete --domain win10 snapshot1

Checking virtual machine status virsh domstats

You can check the status of the virtual machine to get information such as cpu utilization.
virsh domstats [domain]
Here is an example of the execution result:
[root@localhost bin]# virsh domstats win10
Domain: 'win10'
  state.state=1
  state.reason=5
  cpu.time=197136008572
  cpu.user=20720000000
  cpu.system=82070000000
  balloon.current=1048576
  balloon.maximum=1048576
  balloon.last-update=0
  balloon.rss=1144
  vcpu.current=1
  vcpu.maximum=1
  vcpu.0.state=1
  vcpu.0.time=0
  vcpu.0.wait=0
  vcpu.0.halted=예
  net.count=1
  net.0.name=vnet0
  net.0.rx.bytes=32349
  net.0.rx.pkts=564
  net.0.rx.errs=0
  net.0.rx.drop=0
  net.0.tx.bytes=16347
  net.0.tx.pkts=241
  net.0.tx.errs=0
  net.0.tx.drop=0
  block.count=1
  block.0.name=sda
  block.0.path=/home/vm/win10.qcow2
  block.0.rd.reqs=1583
  block.0.rd.bytes=29008384
  block.0.rd.times=985020119
  block.0.wr.reqs=953
  block.0.wr.bytes=11841024
  block.0.wr.times=171686524
  block.0.fl.reqs=161
  block.0.fl.times=19088993
  block.0.allocation=870514688
  block.0.capacity=42949672960
  block.0.physical=870330368
You can see the current cpu information and network utilization of the virtual machine.

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