Difference between revisions of "Virsh"

Latest revision as of 20:45, 26 May 2022

virsh^[1]^[2] is a command line utility for managing virsh guest domains/virtual machines and the hypervisor^[3]. Can be used to operate vm like create, list, start, shutdown or suspend and to manage storage, snapshots and checkpoints^[4] among other actions. virt-manager is a graphical alternative to virsh. It supports Xen, QEMU, KVM, LXC, OpenVZ, VirtualBox and VMware ESX.

virsh is include in libvirt-client package in RHEL and Ubuntu and uses libvirt management API. Binaries included:

Basic Commands[edit]

virsh
virsh -r

All Commands[edit]

virsh --connect
- virsh -c qemu:///system list
virsh attach-device
virsh autostart VM_NAME or virsh autostart VM_NAME --disable (Related: virsh start and virsh pool-autostart)
virsh blockcommit. Allows Live-disk-backup-with-active-blockcommit ^[5]
virsh blockcopy
virsh blockjob
virsh blockresize
virsh change-media
virsh create MY_XML_VM_DEFINITION.XML/
virsh console YOUR_VM
virsh define MY_XML_VM_DEFINITION.XML (define machine but do not start it)
- virsh define xmlfile.xml --validate
- virsh destroy VM_MACHINE_NAME (Ungraceful Shutdown but do not destroy data or VM but you can corrupt guest file systems)
- virsh destroy VM_MACHINE_NAME --graceful
virsh domblklist VMNAME
- virsh domblklist --details VM_MACHINE_NAME
virsh domblkstat VMNAME
virsh domblkinfo VMNAME BLOCK_DEVICE (BLOCK_DEVICE from virsh domblklist command)
virsh domdisplay
virsh domfsfreeze Quiesces the guest filesystem in isolation^[6]
virsh domfsthaw Quiesces the guest filesystem in isolation^[7]
virsh domid
virsh dominfo VMNAME_OR_ID Guess virtual machine information such us state and autostart configuration.
virsh dommemstat
virsh domname
virsh domrename (since 2015)
virsh dump --memory-only --verbose
virsh dumpxml VMNAME - domain information in XML (Can be used to move VMs between hosts ^[8])
virsh edit VMNAME
virsh list
- virsh list --name
virsh memtune
virsh migrate
virsh pool-autostart
virsh pool-build
virsh pool-create create temporary storage pools from command line
virsh pool-create-as create temporary storage pools from XML file
virsh pool-define (create persistent storage from options from XML file)^[9]
virsh pool-define-as (create persistent storage from options from command line)^[10]
virsh pool-event
virsh reboot
virsh restore
virsh resume
virsh save
virsh set-lifecycle-action. Added in November 2017 (v.3.9.0)^[11]
virsh setmaxmem
virsh setmem
- virsh setmem —-config
virsh setvcpus
virsh snapshot-create-as
virsh start
virsh suspend
virsh shutdown
virsh undefine
virsh update-device
virsh vcpuinfo
virsh vncdisplay
virsh backup-begin
virsh checkpoint-create
virsh nodedev-list --tree
virsh nodedev-dumpxml
virsh nodedev-dettach

Getting Information[edit]

List Running Virtual Machines:
- virsh list^[12]^[13]
- virsh list --name
- virsh list --all

virsh dominfo MY_VM_NAME Guess virtual machine information such us state and autostart configuration.

virsh domstats (show all VMs)
- virsh domstats --list-persistent
- virsh domstats MY_VM_MACHINE
  - virsh domstats MY_VM_MACHINE --state
  - --no-wait option https://libvirt.org/news.html

virsh nodeinfo

View configuration:
- virsh dumpxml {guest-id, VM_NAME or uuid} > yourfilename.xml^[14]
- Virtual interfaces: virsh domiflist VM_NAME

Network info:

virsh net-list
virsh net-info

Storage info:

virsh pool-list
virsh pool-info <pool>
virsh vol-list <pool> (Displays Name and Path)
- virsh vol-list --details <pool> (Includes also Capacity and Allocation)
virsh vol-info <vol>

Display info:

virsh vncdisplay VM_NAME
virsh domdisplay VM_NAME

Guest info:

virsh guestinfo v5.7.0 (2019-09-03)^[15] (Libvirt Release notes)

virhostuptime (Since August 2019) https://github.com/libvirt/libvirt/commit/8b802f13cb47817706cba101f5d52e2c8957698d#diff-8d027e5576f9d83750bb73c63b12a6e3

virsh version

virsh capabilities

Operations[edit]

Changing VM running status operations:

Start VM: virsh start VM_MACHINE_NAME
Shutdown VM: virsh shutdown (stop) Gracefully VM
Reboot VM: virsh reboot Restart VM
Reset VM:virsh reset emulates the power reset button on a machine
Resume VM:virsh resume
Destroy VM: virsh destroy VM_NAME (Ungraceful Shutdown/stop VM. Actually do not destroy data or VM but you can corrupt guest file systems)
- virsh destroy VM_MACHINE_NAME --graceful
virsh suspend
Create: virsh define
virsh undefine

virsh console VM_MACHINE_NAME

Snapshots:

virsh snapshot-create
virsh snapshot-create --validate (08/2019) ^[16]

Migrations:

virsh migrate --live GuestName DestinationURL
virsh migrate --offline^[17] (copying non-shared storage or other file based storages (e.g. UEFI variable storage) is not supported during offline migration)

Configuration:

virsh autostart VM_MACHINE_NAME

Virsh Storage commands[edit]

Virsh Storage Information[edit]

virsh domblklist VMNAME
virsh domblkinfo
virsh pool-list
- virsh pool-list --all --details
virsh pool-info <pool>
virsh vol-info <vol>
virsh vol-list <pool> (Displays Name and Path)
- virsh vol-list --details <pool> (Includes also Capacity and Allocation)

All Storage commands[edit]

virsh domblklist VMNAME
virsh domblkinfo
virsh pool-autostart
virsh pool-build
virsh pool-create create temporary storage pools from command line
virsh pool-create-as create temporary storage pools from XML file
virsh pool-define (create persistent storage from options from XML file)^[18]
virsh pool-define-as (create persistent storage from options from command line)^[19]
virsh pool-event
- virsh pool-event --list
- virsh pool-event --event lifecycle
- virsh pool-event --event refresh
virsh pool-list
virsh pool-info <pool>
virsh pool-start <pool>
virsh vol-clone
virsh vol-create-as
virsh vol-info --pool POOL_NAME VOL_NAME
virsh vol-list <pool>

Virsh Snapshots[edit]

virsh snapshot-create Create a snapshot from XML. See also: qemu-img and qemu-img info
virsh snapshot-create-as Create a snapshot from a set of args.
virsh snapshot-current Get or set the current snapshot
virsh snapshot-dumpxml VM_MACHINE_NAME SNAPSHOT_NAME Dump XML for a domain snapshot
virsh snapshot-edit edit XML for a snapshot
virsh snapshot-info snapshot information. (virsh snapshot-info --domain DOMAIN_NAME --snapshotname SNAPSHOT_NAME)
virsh snapshot-list VM_MACHINE_NAME List snapshots for a domain
virsh snapshot-parent Get the name of the parent of a snapshot
virsh snapshot-revert (Destructive action) revert a domain to a snapshot
virsh snapshot-delete Delete a domain snapshot

Virsh CPU Commands[edit]

virsh cpu-models x86_64
virsh setvcpus

Virsh Memory Commands[edit]

virsh Memory Commands: virsh setmaxmem, virsh setmem, virsh dommemstat

QEMU[edit]

virsh qemu-attach QEMU Attach
virsh qemu-monitor-command QEMU Monitor Command
virsh qemu-monitor-event QEMU Monitor Events
- virsh qemu-monitor-event VM_MACHINE_NAME
virsh qemu-agent-command QEMU Guest Agent Command

Networking[edit]

virsh domifaddr
virsh domiflist
virsh net-autostart autostart a network
virsh net-create create a network from an XML file
virsh net-define define an inactive persistent virtual network or modify an existing persistent one from an XML file
virsh net-destroy destroy (stop) a network
virsh net-dhcp-leases print DHCP lease info for a given network
virsh net-dumpxml NET_NAME network information in XML
virsh net-edit edit XML configuration for a network
virsh net-event Network Events
virsh net-info network information
virsh net-list list networks
virsh net-name convert a network UUID to network name
virsh net-start start a (previously defined) inactive network
virsh net-undefine undefine a persistent network
virsh net-update update parts of an existing network's configuration
virsh net-uuid convert a network name to network UUID

Activities[edit]

Review virsh command cheatsheet https://computingforgeeks.com/virsh-commands-cheatsheet/
Read https://github.com/libvirt/libvirt/blob/master/tools/virsh.c source code.
Enable access to your VM Machines via virsh console command
Learn difference between virsh define and virsh create
Create Live backups with active virsh blockcommit^[20]
Offline Migrate or move a virtual machine between two KVM servers without shared storage^[21]: virsh dumpxml and virsh define

References[edit]

Script error: No such module "Check for unknown parameters".

[1] ttp://manpages.ubuntu.com/manpages/xenial/man1/virsh.1.html

[2] ttps://github.com/libvirt/libvirt/blob/master/tools/virsh.c

[3] ttps://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/virtualization/chap-virtualization-managing_guests_with_virsh

[4] ttps://github.com/libvirt/libvirt/commit/689beaa47c51fb49fafa992dd468116b8f6b0782#diff-f41fa7374ab97c527387ea4ce48fd04e

[5] ttps://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit

[6] ttps://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/sect-using_the_qemu_guest_virtual_machine_agent_protocol_cli-libvirt_commands

[7] ttps://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/sect-using_the_qemu_guest_virtual_machine_agent_protocol_cli-libvirt_commands

[8] ttps://serverfault.com/questions/434064/correct-way-to-move-kvm-vm

[9] ttps://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/configuring_and_managing_virtualization/index#creating-storage-for-virtual-machines-using-the-cli_managing-storage-for-virtual-machines-using-the-cli

[10] ttps://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/configuring_and_managing_virtualization/index#creating-storage-for-virtual-machines-using-the-cli_managing-storage-for-virtual-machines-using-the-cli

[11] ttps://libvirt.org/news.html

[12] ttps://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/virtualization/chap-virtualization-managing_guests_with_virsh

[13] ttps://help.ubuntu.com/community/KVM/Managing

[14] ttps://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/sect-domain_commands-creating_a_virtual_machine_xml_dump_configuration_file

[15] ttps://fossies.org/linux/libvirt/NEWS

[16] ttps://libvirt.org/news.html

[17] ttps://libvirt.org/migration.html#offline

[18] ttps://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/configuring_and_managing_virtualization/index#creating-storage-for-virtual-machines-using-the-cli_managing-storage-for-virtual-machines-using-the-cli

[19] ttps://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/configuring_and_managing_virtualization/index#creating-storage-for-virtual-machines-using-the-cli_managing-storage-for-virtual-machines-using-the-cli

[20] ttps://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit

[21] ttps://serverfault.com/questions/434064/correct-way-to-move-kvm-vm

[22] ttps://github.com/virt-manager/virt-manager/tree/master/virtinst

[23] ttps://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_virtualization/getting-started-with-virtualization-in-rhel-8_configuring-and-managing-virtualization

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@@ Line 1: / Line 1: @@
-<code>virsh</code><ref>http://manpages.ubuntu.com/manpages/xenial/man1/virsh.1.html</ref><ref> https://github.com/libvirt/libvirt/blob/master/tools/virsh.c</ref> is a command line utility for managing virsh guest domains/virtual machines and the hypervisor<ref>https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/virtualization/chap-virtualization-managing_guests_with_virsh</ref>. Can be used to operate vm like create, list, start, [[shutdown]] or suspend and to manage storage, [[Virsh Snapshots|snapshots]] and [[checkpoints]]<ref>https://github.com/libvirt/libvirt/commit/689beaa47c51fb49fafa992dd468116b8f6b0782#diff-f41fa7374ab97c527387ea4ce48fd04e</ref> among other actions. <code>[[virt-manager]]</code> is a graphical alternative to virsh. It supports Xen, QEMU, [[KVM]], LXC, OpenVZ, VirtualBox and VMware ESX.
+{{lowercase}}
+<code>virsh</code><ref>http://manpages.ubuntu.com/manpages/xenial/man1/virsh.1.html</ref><ref> https://github.com/libvirt/libvirt/blob/master/tools/virsh.c</ref> is a command line utility for managing virsh guest domains/virtual machines and the hypervisor<ref>https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/virtualization/chap-virtualization-managing_guests_with_virsh</ref>. Can be used to operate vm like create, list, start, [[shutdown]] or suspend and to manage [[Virsh storage information|storage]], [[Virsh Snapshots|snapshots]] and [[checkpoints]]<ref>https://github.com/libvirt/libvirt/commit/689beaa47c51fb49fafa992dd468116b8f6b0782#diff-f41fa7374ab97c527387ea4ce48fd04e</ref> among other actions. <code>[[virt-manager]]</code> is a graphical alternative to virsh. It supports Xen, QEMU, [[KVM]], [[LXC]], [[OpenVZ]], VirtualBox and VMware ESX.
 <code>virsh</code>  is include in <code>[[libvirt|libvirt-client]]</code>  package in [[RHEL]] and [[Ubuntu]] and uses [[libvirt]] management API. Binaries included:
-* virsh
+*<code>virsh</code>
-* [[virt-admin]]
+*<code>[[virt-admin]]</code>
-* [[virt-host-validate]]
+*<code>[[virt-host-validate]]</code>
-* [[virt-login-shell]]
+*<code>[[virt-login-shell]]</code>
-* [[virt-pki-validate]]
+*<code>[[virt-pki-validate]]</code>
-* [[virt-xml-validate]]
+*<code>[[virt-xml-validate]]</code>
 == Basic Commands ==
@@ Line 23: / Line 24: @@
 * <code>[[virsh blockresize]]</code>
 * <code>[[virsh change-media]]</code>
-* <code>[[virsh create]] [[/MY_XML_VM_DEFINITION.XML/]]</code>
+* <code>[[virsh create]] [[MY_XML_VM_DEFINITION.XML/]]</code>
-* <code>[[virsh define]] [[/MY_XML_VM_DEFINITION.XML/]]</code> (define machine but do not start it)
+* <code>[[virsh console]] YOUR_VM</code>
+* <code>[[virsh define]] [[MY_XML_VM_DEFINITION.XML]]</code> (define machine but do not start it)
 ** <code>[[virsh define]] xmlfile.xml --validate</code>
 ** <code>[[virsh destroy]] VM_MACHINE_NAME </code> (Ungraceful Shutdown but do not destroy data or VM but you can corrupt guest file systems)
@@ Line 39: / Line 41: @@
 * <code>[[virsh dommemstat]]</code>
 * <code>[[virsh domname]]</code>
+* <code>[[virsh domrename]]</code> (since 2015)
 * <code>virsh dump --memory-only --verbose</code>
 * <code>[[virsh dumpxml]] VMNAME</code> - domain information in XML (Can be used to move VMs between hosts <ref>https://serverfault.com/questions/434064/correct-way-to-move-kvm-vm</ref>)
@@ Line 55: / Line 58: @@
 * <code>[[virsh reboot]]</code>
 * <code>virsh restore</code>
-* <code>virsh resume</code>
+* <code>[[virsh resume]]</code>
-* <code>virsh save</code>
+* <code>[[virsh save]]</code>
 * <code>virsh set-lifecycle-action</code>. Added in November 2017 (v.3.9.0)<ref>https://libvirt.org/news.html</ref>
 * <code>[[virsh setmaxmem]]</code>
@@ Line 65: / Line 68: @@
 * <code>[[virsh start]]</code>
 * <code>[[virsh suspend]]</code>
-* <code>virsh save</code>
 * <code>[[virsh shutdown]]</code>
 * <code>[[virsh undefine]]</code>
@@ Line 71: / Line 73: @@
 * <code>[[virsh vcpuinfo]]</code>
 * <code>[[virsh vncdisplay]]</code>
+* <code>[[virsh backup-begin]]</code>
+* <code>[[virsh checkpoint-create]]</code>
+* <code>[[virsh nodedev-list --tree]]</code>
+* <code>[[virsh nodedev-dumpxml]]</code>
+* <code>[[virsh nodedev-dettach]]</code>
 == Getting Information ==
@@ Line 113: / Line 120: @@
 * <code>[[virsh version]]</code>
+* <code>[[virsh capabilities]]</code>
 == Operations ==
@@ Line 181: / Line 190: @@
 == See also ==
-* <code>[[virtinst]]</code> package<ref>https://github.com/virt-manager/virt-manager/tree/master/virtinst</ref>, includes following python binaries: <code>virt-clone</code>, <code>virt-convert</code>, <code>[[virt-install]]</code><ref>https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_virtualization/getting-started-with-virtualization-in-rhel-8_configuring-and-managing-virtualization</ref>
+* <code>[[virtinst]]</code> package<ref>https://github.com/virt-manager/virt-manager/tree/master/virtinst</ref>, includes following python binaries: <code>[[virt-clone]]</code>, <code>virt-convert</code>, <code>[[virt-install]]</code><ref>https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_virtualization/getting-started-with-virtualization-in-rhel-8_configuring-and-managing-virtualization</ref>
 * [[virt-top]] 'top'-like utility for virtualization stats
 * [[ovirt-RHV module]]
-* [[KVM]] and [[libvirt]]
 * [[virt-admin]]
+* {{libvirtd}}
+* {{KVM}}
 * {{virsh}}

Difference between revisions of "Virsh"

Latest revision as of 20:45, 26 May 2022

Contents

Basic Commands[edit]

All Commands[edit]

Getting Information[edit]

Operations[edit]

Virsh Storage commands[edit]

Virsh Storage Information[edit]

All Storage commands[edit]

Virsh Snapshots[edit]

Virsh CPU Commands[edit]

Virsh Memory Commands[edit]

QEMU[edit]

Networking[edit]

Activities[edit]

See also[edit]

References[edit]

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