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.

Comments

Post a Comment

Popular posts from this blog

Enabling Com Port on Hyper-V 2nd Generation VM / Windbg

Image
To test the UEFI boot environment, I created a second generation virtual machine in Hyper-V. And I had to configure the Com port to attach the kernel debugger.  However, the Com Port device was not visible in the 2nd generation Hyper-V VM.  Invisible Com port device Hyper-V 2nd generation VM must be assigned a pipe to the Com port to be visible in the device list. 1. VM termination First, shut down the VM before working. 2. Run as Powrshell administrator Detailed configuration of Hyper-V VM can be done through Powershell command.  Run Powershell with administrator privileges.  3. set-vmcomport  Run the following command to activate the com port. set -vmcomport -vmname [VM이름] -number [COM포트번호] [파이프이름] To check the COM port to which the pipe is assigned, execute the following command. get -vmcomport -vmname [VM이름] The following is an example of command execution.  https://docs.microsoft.com/en-us/powershell/module/hyper-v/set-vmcomport?view=win10-ps
Read more

DLL Injection using CreateRemoteThread in Windows 10

Image
DLL Injection using CreateRemoteThread One of the methods of DLL injection is to create a RemoteThread and load the desired DLL into the target process.  This is one of the simplest and most widely used methods.  CreateRemoteThread You can create a thread in another process using the API. CreateRemoteThread If you browse on MSDN, you'll see the following in Remarks: https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-createremotethread   CreateRemoteThread function (processthreadsapi.h)-Win32 apps Creates a thread that runs in the virtual address space of another process. docs.microsoft.com Terminal Services isolates each terminal session by design.  Therefore,  CreateRemoteThread  fails if the target process is in a different session than the calling process. In translation, Terminal Services Pros say that if the target process is running in a different session, it will fail because the session is specified and executed
Read more

Using Overlapped I / O in DeviceIoControl

Image
Using Overlapped I / O in DeviceIoControl Various methods can be used, such as  synchronizing with events and continuously receiving events through polling, to monitor the frequent events in the kernel driver one by one in user mode  . Scenario in question Imagine that you continue to receive events with relatively simple polling.  The kernel driver queues the event that occurred, and the user mode application issues the IOCTL to retrieve the contents of the queue.  In this type of logic, the user-mode application will  While execute the same loop as  DeviceIoControl and will continue to communicate with the driver by calling. while ( true ) { BOOL ret = DeviceIoControl(hDevice, IOCTL_RECV, &data, sizeof (DATA), 0 , 0 ,&dwReturn, NULL ); if (ret) { // 처리.. } } DeviceIoControl Blocking 발생 In the previously used logic,  DeviceIoControl blocking occurs  until an event occurs in the kernel driver  .  DeviceIoControl Blocking occurs in the user m
Read more