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Questions tagged [libvirt-guests]

9 questions
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Delayed start for Guests KVM/libvirt

Looking for any pointers anyone may have to introduce a delayed start for KVM guests i.e. 30 seconds between starting each virtual server rather than starting them all at once which thrashes the disks and actually just ends up taking a lot longer to…
Backtogeek
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Assign ethernet alias to KVM guest

I have a pool of IP addresses and a single ethernet cable. I have set aliases: auto enp2s0:0 iface enp2s0:0 inet static address x.x.x.x netmask x.x.x.x I want to dedicate some of the aliases to a libvirt kvm guest, so that the ip is set from…
Laurent
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Virtualized Centos 7 on Ubuntu host: very slow I/O

I run a Centos 7 virtualized in Ubuntu 20.04. There is a huge I/O performance drop in the VM compared to the host. The host has plenty of RAM. Host: * MB/s = 1,000,000 bytes/s * KB = 1000 bytes, KiB = 1024 bytes Sequential Read (Q= 32,T= 1) : …
Laurent
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2 answers

KVM quests "stuttering"/"freezing" intermittently on Debian 10

I'm using KVM on Debian 10 as host and for now two guests that are Debian 10 as well. The guests are "stuttering" frequently, what I mean by that is that like at least several times an hour a guest becomes unresponsive for like 10 seconds. If I have…
LetMeSOThat4U
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Libvirt VM using twice it's memory

Running on Ubuntu server, a CentOS 7 VM is eating the memory : Host: # free -m total used free shared buff/cache available Mem: 80140 71676 5346 7 3117 7655 Swap: …
Laurent
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gcp suspending active libvirt guests

I am facing the issue where GCP is suspending all the active libvirt guests frequently. Below are the logs from syslog. google-clock-skew: INFO Synced system time with hardware clock. systemd[1]: Started Virtualization daemon. systemd[1]: Starting…
user550256
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How to route network traffic between KVM and VirtualBox?

Is there a simple way to route network traffic between two VMs, one in virtualbox and the other in KVM/libvirt? In the KVM World, I can see the virbr interfaces (Virtual Bridges?) and they have an IP assigned: virbr0:…
Aldo Bassanini
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1 answer

Missing KVM snapshots in virt-manager

I need to resize an image and receive an error when using qemu-img the resize is not supported because snapshots exist. Sure enough, even though virt-manager does not show any snapshots, I see the following when listing the snapshots with…
rwfitzy
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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 directory location defined! The default is into…
Philippe Gachoud
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