libvirt[1] is a virtualization API with supports for KVM, QEMU, Xen, Virtuozzo, VMWare ESX, LXC, BHyve and more



Ubuntu packages

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At least the following packages compose libvirt in Ubuntu:

  • libvirt-bin
  • libvirt-clients: virsh, virt-admin virt-host-validate virt-login-shell virt-pki-validate virt-xml-validate
  • libvirt-daemon:
libvirtd: /etc/libvirt/virtlogd.conf
virt-sanlock-cleanup
virtlockd
virtlogd

Config files and directories

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  • Config directories:
/etc/libvirt/
/etc/libvirt/qemu
  • Config files:
/etc/libvirt/virtlogd.conf
Includes information about Unix Socket permissions: unix_sock_group, unix_sock_ro_perms, unix_sock_rw_perms, auth_unix_ro, auth_unix_rw
  • Images directory: /var/lib/libvirt/images (See: virsh pool-define-as)
  • Logs:
/var/log/libvirt/qemu
journalctl -u libvirtd

libvirtd[14189]: 2019-11-21 15:08:13.035+0000: 14192: error : qemuDomainBlockCommit:17568 : invalid argument: top '/path/to/file/VM_NAME.qcow2' in chain for 'hda' has no backing file

Activities

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Basic

Medium

  • Restart libvirtd daemon: systemctl restart libvirtd


Expert:

See also

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  1. https://libvirt.org/