Difference between revisions of "Libvirt"
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| − | libvirt<ref>https://libvirt.org/</ref> is a virtualization API with supports for [[KVM]], [[QEMU]], Xen, Virtuozzo, VMWare ESX, LXC, BHyve and more | + | <code>libvirt</code><ref>https://libvirt.org/</ref> is a [[virtualization]] API with supports for [[KVM]], [[QEMU]], Xen, Virtuozzo, VMWare ESX, LXC, BHyve and more |
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At least the following packages compose libvirt in Ubuntu: | At least the following packages compose libvirt in Ubuntu: | ||
* <code>[[libvirt-bin]]</code> (<code>dpkg -s</code> This is a transitional package. You can safely remove it) | * <code>[[libvirt-bin]]</code> (<code>dpkg -s</code> This is a transitional package. You can safely remove it) | ||
| + | |||
| + | [[Ubuntu 20.04 LTS]] | ||
* <code>[[libvirt-clients]]</code>: <code>[[virsh]]</code>, <code>[[virt-admin]]</code>, <code>virt-host-validate</code>, <code>[[virt-login-shell]]</code>, <code>[[virt-pki-validate]]</code>, <code>[[virt-xml-validate]]</code> | * <code>[[libvirt-clients]]</code>: <code>[[virsh]]</code>, <code>[[virt-admin]]</code>, <code>virt-host-validate</code>, <code>[[virt-login-shell]]</code>, <code>[[virt-pki-validate]]</code>, <code>[[virt-xml-validate]]</code> | ||
* <code>[[libvirt-daemon]]</code>: | * <code>[[libvirt-daemon]]</code>: | ||
| − | ::<code>libvirtd</code>: <code>/etc/libvirt/ | + | ::<code>libvirtd</code>: <code>[[/etc/libvirt/virtlogd.conf]]</code> |
::<code>virt-sanlock-cleanup</code> | ::<code>virt-sanlock-cleanup</code> | ||
::<code>virtlockd</code> | ::<code>virtlockd</code> | ||
| − | ::<code>virtlogd</code> | + | ::<code>[[virtlogd]]</code> (<code>[[systemctl status libvirtd]]</code>) |
| − | * <code>libvirt-daemon-system</code> | + | ::<code>[[libvirt-guests.sh]]</code> |
| + | * <code>[[libvirt-daemon-system]]</code> | ||
| + | ::<code>[[systemctl status libvirt-guests]]</code> | ||
== Config files and directories == | == Config files and directories == | ||
* Config directories: | * Config directories: | ||
:: <code>/etc/[[libvirt]]/</code> | :: <code>/etc/[[libvirt]]/</code> | ||
| − | :: <code>/etc/libvirt/storage/</code> | + | :: <code>/etc/[[libvirt/storage/]]</code> (In Ubuntu there is no default pool. Folder will be automatically created with first pool) |
| − | :: <code>/etc/[[libvirt]]/qemu/XML_FILES_FROM_SERVERS.XML</code> | + | :: <code>/etc/[[libvirt]]/[[qemu.conf]]</code> |
| + | :: <code>/etc/[[libvirt]]/[[qemu]]/XML_FILES_FROM_SERVERS.XML</code> | ||
:: <code>/etc/[[libvirt]]/qemu/networks</code> | :: <code>/etc/[[libvirt]]/qemu/networks</code> | ||
* Config files: | * Config files: | ||
| − | :: <code>/etc/libvirt/virtlogd.conf</code> | + | :: <code>/etc/libvirt/[[virtlogd.conf]]</code> |
::: Includes information about Unix Socket permissions: unix_sock_group, unix_sock_ro_perms, unix_sock_rw_perms, auth_unix_ro, auth_unix_rw | ::: Includes information about Unix Socket permissions: unix_sock_group, unix_sock_ro_perms, unix_sock_rw_perms, auth_unix_ro, auth_unix_rw | ||
| − | :: <code>/etc/libvirt/libvirtd.conf</code> | + | :: <code>[[/etc/libvirt/libvirtd.conf]]</code> |
* Images directory: <code>/var/lib/libvirt/images</code> (See: <code>[[virsh pool-define-as]]</code>) | * Images directory: <code>/var/lib/libvirt/images</code> (See: <code>[[virsh pool-define-as]]</code>) | ||
| − | * Logs: | + | * [[Journalctl -u libvirtd|Logs]]: |
| − | :<code>/var/log/libvirt/ | + | :<code>[[/var/log/libvirt/qemu/]]</code> |
| − | :<code>[[journalctl -u libvirtd]]</code> | + | :<code>[[journalctl -r -u libvirtd]]</code> |
:<code>[[systemctl status libvirtd]]</code> | :<code>[[systemctl status libvirtd]]</code> | ||
:<code>[[systemctl restart libvirtd]]</code> | :<code>[[systemctl restart libvirtd]]</code> | ||
| + | |||
| + | * Information | ||
| + | :<code>[[libvirtd --help]]</code>, the daemon will print out the paths of the Unix domain socket(s) that it listens on | ||
== Activities == | == Activities == | ||
| Line 50: | Line 56: | ||
* [[Review libvirt error messages in journald]] | * [[Review libvirt error messages in journald]] | ||
* Understand different CPU model an topologies: https://libvirt.org/formatdomain.html#elementsCPU | * Understand different CPU model an topologies: https://libvirt.org/formatdomain.html#elementsCPU | ||
| + | * Review [[AppArmor]] configurations related to libvirt: <code>/etc/apparmor.d/libvirt</code> | ||
| + | |||
| + | |||
| + | == Related terms == | ||
| + | * <code>[[multipass set]] local.driver=libvirt</code> | ||
| + | * [[Ceph]] storage driver backend | ||
| + | * <code>[[prometheus-libvirt-exporter]]</code> | ||
== See also == | == See also == | ||
* [[MacVTap]] | * [[MacVTap]] | ||
| + | * {{libvirtd}} | ||
| + | * {{libvirt}} | ||
| + | * {{virt-manager}} | ||
* {{virsh}} | * {{virsh}} | ||
* {{QEMU}} | * {{QEMU}} | ||
| + | * {{KVM platforms}} | ||
* {{KVM}} | * {{KVM}} | ||
Latest revision as of 19:24, 4 June 2022
libvirt[1] is a virtualization API with supports for KVM, QEMU, Xen, Virtuozzo, VMWare ESX, LXC, BHyve and more
Ubuntu packages[edit]
At least the following packages compose libvirt in Ubuntu:
libvirt-bin(dpkg -sThis is a transitional package. You can safely remove it)
libvirt-clients:virsh,virt-admin,virt-host-validate,virt-login-shell,virt-pki-validate,virt-xml-validatelibvirt-daemon:
libvirtd:/etc/libvirt/virtlogd.confvirt-sanlock-cleanupvirtlockdvirtlogd(systemctl status libvirtd)libvirt-guests.sh
Config files and directories[edit]
- Config directories:
- 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
/etc/libvirt/libvirtd.conf
- Images directory:
/var/lib/libvirt/images(See:virsh pool-define-as) - Logs:
/var/log/libvirt/qemu/journalctl -r -u libvirtdsystemctl status libvirtdsystemctl restart libvirtd
- Information
libvirtd --help, the daemon will print out the paths of the Unix domain socket(s) that it listens on
Activities[edit]
Basic
- Read Libvirt Changelog: https://libvirt.org/git/?p=libvirt.git;a=log
- Read Libvirt Release notes: https://libvirt.org/news.html
- Read Libvirt FAQ: https://wiki.libvirt.org/page/FAQ
- Install KVM in an Ubuntu Server following https://help.ubuntu.com/community/KVM/Installation instructions:
Medium
- Restart libvirtd daemon:
systemctl restart libvirtd
Advanced:
- Read Libvirt code: https://github.com/libvirt/libvirt
- Implement uptime functionality in libvirt code: https://www.spinics.net/linux/fedora/libvir/msg98027.html
- Review libvirt error messages in journald
- Understand different CPU model an topologies: https://libvirt.org/formatdomain.html#elementsCPU
- Review AppArmor configurations related to libvirt:
/etc/apparmor.d/libvirt
Related terms[edit]
multipass set local.driver=libvirt- Ceph storage driver backend
prometheus-libvirt-exporter
See also[edit]
- MacVTap
- libvirtd:
systemctl status libvirtd,systemctl status libvirt-guests, Libvirt release notes, logs,libvirtd.conf,/etc/libvirt/,/var/log/libvirt/ libvirt,virtlogd.conf,/etc/libvirt/storage/,libvirt-guests.sh,/etc/libvirt/virtlogd.conf,/var/lib/libvirt/images/virt-manager,virsh vncdisplay,virt-installvirsh: Storage information, Connecting, Operations, Memory, Snapshots, Networking, CPU, release notes,virsh nodedev-list- QEMU:
qemu-img,qemu-ga,qemu.conf,virsh qemu, QEMU guest agent (qemu-ga), qcow2,qemu-nbd, qemu-img map,qemu-io,/etc/libvirt/qemu.conf, QEMU releases, VENOM,qemu-nbd --help, qemu-system - KVM: RHV, oVirt, libvirtd
- KVM, Installation, QEMU,
virsh,virtinst,libguestfs-tools, libvirt, qemu, Red Hat Virtualization (RHV), MacVTap, Virtio, oVirt, KVM services, KVM networking, KVM graphics, CPU, KVM on ARM
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