Chapitre 9. Viewing information about virtual machines
When you need to adjust or troubleshoot any aspect of your virtualization deployment on RHEL 9, the first step you need to perform usually is to view information about the current state and configuration of your virtual machines. To do so, you can use the command-line interface or the web console. You can also view the information in the VM’s XML configuration.
9.1. Viewing virtual machine information using the command-line interface
To retrieve information about virtual machines (VMs) on your host and their configurations, use one or more of the following commands.
Procédure
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 offTo 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 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.isoTo obtain information about a VM’s file systems and their mountpoints:
# virsh domfsinfo testguest3 Mountpoint Name Type Target ------------------------------------ / dm-0 xfs /boot vda1 xfs
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: yyyyTo configure and optimize the vCPUs in your VM, see Optimizing virtual machine CPU performance.
To list all virtual network interfaces on your host:
# virsh net-list --all Name State Autostart Persistent --------------------------------------------- default active yes yes labnet active yes yesFor information about a specific interface:
# virsh net-info default Name: default UUID: c699f9f6-9202-4ca8-91d0-6b8cb9024116 Active: yes Persistent: yes Autostart: yes Bridge: virbr0For details about network interfaces, VM networks, and instructions for configuring them, see Configuring virtual machine network connections.
