第 10 章 Viewing information about virtual machines

Procedure

• To obtain a list of VMs on your host:

  # virsh list --all
  Id   Name              State
  ----------------------------------
  1    testguest1             running
  -    testguest2             shut off
  -    testguest3             shut off
  -    testguest4             shut off

• To obtain basic information about a specific VM:

  # virsh dominfo _testguest1
  Id:             1
  Name:           testguest1
  UUID:           a973666f-2f6e-415a-8949-75a7a98569e1
  OS Type:        hvm
  State:          running
  CPU(s):         2
  CPU time:       188.3s
  Max memory:     4194304 KiB
  Used memory:    4194304 KiB
  Persistent:     yes
  Autostart:      disable
  Managed save:   no
  Security model: selinux
  Security DOI:   0
  Security label: system_u:system_r:svirt_t:s0:c486,c538 (enforcing)

• To obtain the complete XML configuration of a specific VM:

  # virsh dumpxml testguest2
  
  <domain type='kvm' id='1'>
    <name>testguest2</name>
    <uuid>a973434f-2f6e-4ěša-8949-76a7a98569e1</uuid>
    <metadata>
  [...]

  For an annotated example of a VM’s XML configuration, see Sample virtual machine XML configuration

• For information about a VM’s disks and other block devices:

  # virsh domblklist testguest3
   Target   Source
  ---------------------------------------------------------------
   vda      /var/lib/libvirt/images/testguest3.qcow2
   sda      -
   sdb      /home/username/Downloads/virt-p2v-1.36.10-1.el7.iso

  For instructions on managing a VM’s storage, see Managing storage for virtual machines.

• To obtain information about a VM’s file systems and their mountpoints:

  # virsh domfsinfo testguest3
  Mountpoint   Name   Type   Target
  ------------------------------------
   /            dm-0   xfs   vda
   /boot        vda2   xfs   vda
   /boot/efi    vda1   vfat  vda

• To obtain more details about the vCPUs of a specific VM:

  # virsh vcpuinfo testguest4
  VCPU:           0
  CPU:            3
  State:          running
  CPU time:       103.1s
  CPU Affinity:   yyyy
  
  VCPU:           1
  CPU:            0
  State:          running
  CPU time:       88.6s
  CPU Affinity:   yyyy

  To configure and optimize the vCPUs in your VM, see Optimizing virtual machine CPU performance.

• To list all network interfaces of a specific VM:

  # virsh domiflist testguest5
  Interface   Type      Source    Model    MAC
  -------------------------------------------------------------
   vnet0       network   default   virtio   52:54:00:ad:23:fd
   vnet1       bridge    br0       virtio   52:54:00:40:d4:9d

  For details about network interfaces, VM networks, and instructions for configuring them, see Configuring virtual machine network connections.

• For instructions on viewing information about storage pools and storage volumes on your host, see Viewing virtual machine storage information by using the CLI.