Questions tagged [virsh]
The virsh program is the main interface for managing virsh guest domains. Virtualization of the Linux Operating System means the ability to run multiple instances of Operating Systems concurrently on a single hardware system where the basic resources are driven by a Linux instance. The library aims at providing a long term stable C API .
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Virsh corruption image, re-merge snapshot?
I have an issue with one of my images. The image is encrypted.
About three weeks ago I started a snapshot of a running image and then did a blockcommit more recently. Something has since happened to ...
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Can you use virsh to reset vm id sequence? [duplicate]
Question in regards to "Id" for running VMs, using virsh running local Qemu VMs.
command virsh list will bring up a list of the current running VMs defined, eg,
Id Name State
--------------...
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libvirt virsh not using a predefined target while attaching interface
I am trying to automate the process of creating a Guest VM. I am using uvt-kvm to create the VM. I am also taking a network type as a parameter. This can be either nat or macvtap.
Now in the script I ...
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Controlling virsh filters right way
I'm running centos 7, lxc for containers, virsh for setting up a bridge.
Upon creation, virsh set up some firewall rules for virbr
# iptables-save | grep virbr
-A POSTROUTING -o virbr0 -p udp -m udp --...
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Migration disabled: vhost-user backend lacks VHOST_USER_PROTOCOL_F_LOG_SHMFD feature
I tried this command on the host.
virsh snapshot-create-as --domain test_vm_back --name "snapshot-before-install-package" --description "snapshot test"
As you know, this is just a ...
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Linux virtual machine network DDOS protection
I have dedicated server with installed virsh. On the server I have 5 virtual servers.
When someone DDOS attack dedicated server is everyting ok. I hardly know it's an attack.
But if someone attacks ...
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how to enable virsh console a ubuntu domain
Environment description:
host:
libvirtd (libvirt) 6.0.0
os version: 20.04.2 LTS (Focal Fossa)
guest:
os version: 20.04.2 LTS (Focal Fossa)
Problem description:
I tried to follow https://wiki.libvirt....
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Virt-manager: unable to interact with existing vms on a server
I have 3vm's on a kvm. of recent i have been able to manage these vm's visually through virt-manager. on a windows machine i have been using mobaxterm to access the server and everything was working ...
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116
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Issues with starting a virtual machine using virsh without intializing virt manager
I am having problems with starting a virtual machine using virsh.
When I do virsh list --all, I see the VM named "ubuntu20.04" and it's state if shut off. Then I do virsh start ubuntu20.04 ...
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How can I blockpull an inactive domain?
For active domain I can do virsh blockpull --domain ... --path ... --base ... I would expect the blockpull should also work with inactive domain since it should be even easier (there is no write ...
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virsh command that displays all the domins' the affinity to physical processors?
I want to know if there is a command virsh to display all the running domins' the affinity to physical processors? I know vcpuinfo domin to get one domin's info, but it change so fast. I set 16 VMs ...
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`virsh -c qemu:///session list --all` lists VMs created in `QEMU/KVM` connection, but misses VM from `QEMU/KVM User session` of Virt-Manager
# virsh -c qemu:///session list --all lists only VMs created in QEMU/KVM connection (system !), but misses VM I've created in QEMU/KVM User session in GUI of Virt-Manager. Why? From below I unserstand ...
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Why would a KVM/Qemu VM, running successfully on a new host, get stuck "Paused" after a few minutes?
I used virsh commands to backup a Xubuntu 22.04 VM on an Ubuntu 20.04 machine and restore it on an Ubuntu 18.04 machine.
The VM starts up successfully, but after a few minutes of running apt updates ...
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libvirt guest cannot be reboot within itself or from host
I have a guest(debian9) created by:
virt-install --name vm --events=on_reboot=restart,on_poweroff=restart,on_crash=restart --disk /opt/debian9.qcow2 --import
acpid is installed in guest.
If I reboot ...
- 123
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3
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556
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Virsh command hangs when script runs in the background
I have a bash script which runs as a cronjob. This script runs several commands and one of them is the following virsh command:
/usr/bin/virsh list --all
When I run this script in the terminal (as ...
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How to resize kvm vm host
KVM Host Environment:-
# cat /etc/issue
Welcome to openSUSE 13.2 "Harlequin" - Kernel \r (\l).
# /usr/bin/qemu-system-x86_64 --version
QEMU emulator version 2.1.3
With the below commands i ...
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1
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virsh console hangs when i connect kvm VM
KVM Host Environment:-
# cat /etc/issue
Welcome to openSUSE 13.2 "Harlequin" - Kernel \r (\l).
# /usr/bin/qemu-system-x86_64 --version
QEMU emulator version 2.1.3
Running VMs list as ...
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Migrating libvirt guest vm to a new storage directory on the same host
I have found a few related questions/articles but nothing about just simply moving an existing VM to a new directory on the same machine. That's what this question entails.
For this scenario, I need ...
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Libvirt / virsh getting slow after long uptime
After a fresh reboot virsh list / virt-install is fast, as expected, but after a couple of months uptime they both took a long time.
Virsh list takes around 3 seconds (from 0.04s on a fresh reboot) ...
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250
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reaching apache public reverse proxy virtualhost url from localhost behind a NAT using iptables
I have an issue with a guest using virsh behind a server running with iptables firewall. This guest hosts websites, one is mattermost with reverse proxy.
Everything is working well. I then installed ...
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976
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Copy and paste from a QEMU VM with VNC graphics?
I run a headless server that uses qemu + kvm to run a few VMs, and I manage them with virsh + xml file definitions. Because this a remote / headless system, I set the graphics as VNC, and then with ...
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vcpu counts aren't changing after config change and reboot
I recently downsized the number of vcpus virtual server Echobox1 uses from 4 to 1.
before:
# virsh vcpucount Echobox1
maximum config 4
maximum live 4
current config ...
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4
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3
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2k
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virsh autostart not working
root@virtual3:~# virsh autostart nstest
Domain nstest marked as autostarted
root@virtual3:~# virsh dominfo nstest
Id: -
Name: nstest
UUID: 8cf691cd-7246-442b-a26b-...
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871
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Loading a KVM guest with static IP using XML file
I have an XML template for the image I am loading on KVM using ansible. For now, the image loads without IP. I would like to know if there is a way to add static IP on the XML template so that my VM ...
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1k
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Why is net-dhcp-leases coming up empty in VIRSH?
From the following command virsh net-edit default, I see:
<network>
<name>default</name>
<uuid>7a106327-942a-40e7-a977-018b5323832a</uuid>
<forward mode='nat'/&...
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1
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1k
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Where are RAM snapshots stored by libvirt?
My understanding is that when I run this command to create a snapshot of a running domain:
virsh snapshot-create-as myvm snapshot1
that not only are internal snapshots created in each disk image file,...
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Virsh console not responding after rebooting guest machine
I have a server running Ubuntu 20.04 with KVM. Whenever I install a guest VM (CentOS 7 or Fedora 34), virsh console works fine in the beginning. However, when I reboot this VM, virsh console stops ...
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1
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1k
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Migrate a QEMU/KVM VM from qemu:///system to qemu:///session
I have a created a Windows 10 VM using virt-manager as user (not root).
However, when try to list the VMs with virsh list --all, My VM is not listed? And, if I specify the system URI with by running ...
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409
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Override virsh network from xml file to apply custom dnsmasq options outside
I want to automatically add a DNS CNAME entry using the dnsmasq namespace. Since this seems too complex to be handled by virsh net-edit, my idea is to use virsh net-dumpxml, apply the modifications ...
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416
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Unable to resize lvm to max of vda
I am trying to resize my lvm partition frm 29GB to ~60GB. Here is my current status:
root@demo:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 ...
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Ubuntu 20.04 cloud image can't get IP address
When using virt-install to create a guest, CentOS 7.9 cloud image successfully gets an IP address, which can be checked with sudo virsh domifaddr <domain>. However, Ubuntu 20.04 LTS cloud image ...
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529
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Disable libvirt storage pools
It seems every time I create a VM with virt-install a new storage pool is created.
But I don't use storage pools at all!
I looked in the virt-install manual but could find a way to prevent this from ...
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489
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network interfaces are deleted after issuing a virsh shutdown on VM
I tried to instantiate a VM using virt-install command with few interfaces as needed. The exact command is as follows:
virt-install \
--name VM \
--noautoconsole \
--input keyboard \
--...
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0
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1k
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virsh attach-disk not working for iso file driver
Does anyone have any idea why I can't get this working.
I have a windows7 guest vm installed with virt-install on a bridge. Windows 7 or 10 cannot get a drive for the network installed.
Following ...
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3
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744
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KVM trying to restore from backup and getting error unexpected data
Hello I made a backup of a VM guest with these steps:
1. virsh dumpxml --migratable test > /backup/test.xml
2. virsh snapshot-create-as --domain test \
--name backup....
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1
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341
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Xen VM continuously restarts and kernel fails to start init
I am using a VM built using the Xen hypervisor and libvirt management layer. I couldn't connect to the VM after updating the Debian verison from 8 to 9 so I tried logging into the physical machine the ...
- 111
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1
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3k
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QEMU / KVM - Dedicated 802.1q VLAN for each VM - Communication only via router
I have a Linux firewall router (dedicated machine) with multiple ethN interfaces (my "big firewall"). All forwarded traffic is filtered by a set of iptables rules (default policy DROP).
...
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2k
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Where is virsh save directory location defined
The default location of the virsh save myVm goes into /var/lib/something which makes my slash partition full on a Vm save, which is really anoying.
I could not figure out where is the virsh save myVm ...
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Restoring terminal/TTY to normal after virt-install?
After having created a VM with virt-install then the terminal is only 24 lines, where the terminal have 70 lines.
I recall seeing a similar issue with virsh console.
Question
Ideally would I like both ...
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673
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Can't start domain cloned with virt-clone
Final Update at bottom
I have a working KVM domain which I've configured and want to use as a 'template' for other guests. So, my process is roughly this:
Shut down the 'source' domain (07xQBuild)
...
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1
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3k
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KVM live migration for non shared lvm storage
I am trying to live migrate my KVM based VM from one host to another for non shared storage using virsh migrate. I have set both the hostnames at /etc/hosts on each of the host. Also I have set ...
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3
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2k
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How to reduce KVM qcow2 disk size?
When I boot in my guest Debian it says it size is 2.7G.
df -h
Filesystem Size Used Avail Use% Mounted on
udev 718M 0 718M 0% /dev
tmpfs 147M 6.2M 141M 5% /run
/...
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2k
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Using virt-install to create a Ubuntu VM with iso / access to virsh console
I am trying to set up a Ubuntu server VM (CLI only) on a Debian host (CLI only) using virt-install (version 1.0.1).
But following install:
sudo virt-install --name=<name> --disk path=/home/...
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490
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Unable to access console or SSH on Amazon Linux 2 KVM image
I am trying to create a KVM guest instance running Amazon Linux 2 in an on-premises environment, on a CentOS 7 host. I am doing this over SSH (e.g. my local machine -> SSH to the CentOS host).
I know ...
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Where are the OS specific properties located used by virt-install --os-variant
Using
virt-install ... --os-variant win10 ...
virt-install create a new VM optimized for Windows 10.
But where are those OS specific properties located?
E.g. machine-type and the <hyperv> ...
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264
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KVM VM lost its public IP and access to the internet after reboot?
I have shut-downed one of the VMs with "virsh shutdown VM" and when I started it, it lost its access to the internet. The VM had its own pupblic IP that had its own interface. I'm not sure how this ...
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virt-install on Centos 8.1 doesn't complete when using --location http://localhost/inst
Should you reached this before, please let me know.
ISSUE
virt-install works well when passing arguments --cdrom /path/to/iso (and creates the guest) like
[root@192-168-0-104 admin]# virt-install -...
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1
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146
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How to enable virsh console on Centos Atomic host?
I've Installed Centos AtomicHost Os on KVM , I just want to enable virsh console on it !
Tried below method but its is not working.
1. Added console=tty0 on /etc/grub/defailt
GRUB_CMDLINE_LINUX="...
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why is kvm pool so small
I set up kvm on a fresh install ubuntu server 18.04 on a 1TB disk. There is nothing else on the disk. Whether I use virt-manager or virsh on cli to create a pool, I always get a pool of 3.75GB ...
- 1
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1
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Virsh command not working to install Centos 8 virtual-machine on Ubuntu 18.04 via qemu/kvm [closed]
I am trying to install centos 8 on ubuntu 18.04 as a virtual machine. I have a wireless connection. When I run the following command:
chh2@chh2-cpu:~$ sudo virt-install --name=chris_centos --ram=...
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