Questions tagged [virtualization]
Virtualization is a group of software technologies that allow abstraction between layers of a system. This allows separation between the logical layers of the system, providing isolation, flexibility, and/or the ability to run more than one at a time. This differs from most traditional systems where the various layers are inherently tied.
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Server virtualization: what to virtualize?
Several years ago we virtualized our "new" Windows Server 2016 with Microsoft Hyper-V Server 2016 on a Lenovo TS120 with a Xeon E3-1245, 32GB (4x8GB) and 2x2TB@7200RPM (RAID1) (the ...
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iptables loses source address when forwarding to an internal virtual machine (Proxmox)
I have a Proxmox hypervisor. This proxmox is running a VM with HAProxy load balancer.
I am now trying to forward to this HAProxy via iptables port 80 and 443. Unfortunately the source address is lost ...
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Why should I enable promiscuous mode?
I'm currently using an environment lab for testing ESXi so I run nested ESX(two ESX are installed on ESX)
The problem is I was trying to install vCenter on both of my lab ESX and at the end of stage 1 ...
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check_kvm_support script failed to start error when attempting to create VM
When I attempt to initialise a VM on Debian 10 instance I am getting an error :
multipass launch --name kube-master --cpus 1 --mem 1024M --disk 3G
launch failed: The check_kvm_support script failed ...
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What, exactly, is the difference between "host only" and "LAN segment" in VMware?
From what I understand, with LAN segment you have to manually create a route (routing table) while host only does it for you.
Can someone clarify?
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PFSense on Hyper-V - Can't Access VMs from hypervisor
I'm hoping someone can help clarify what i'm doing, perhaps i'm missing something obvious, but I'm trying to setup PFSense as a VM on my workstation.
I've ceated two virtual switches, one external (...
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Public IP to VM in esxi
So I had proxmox installed but boss decided to install vmware esxi in ovh vps so this is the scenario. I have a server which has esxi and I have purchased a bunch of Ips from OVH since I want to have ...
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Providing Guest VM to connect to Internet through Host on ESXi with only one adapter
I am new to virtualized environment. I have a bare-metal server provided by a hosting company which has ESXi 6.5 running on it. It has only one physical adapter, one Management Network and one VM ...
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2
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Creating new datastore and VMFS [closed]
I was currently working on the ESXi lab and trying to do some work with it. So I have an ESXi that is running on a server and I installed 2 ESXi on it (two ESXi are running on the primary ESXi).
The ...
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Virtual CD is not connecting in IPMI JViewer
I am not able to mount the ISO image in the IPMI Remote JViewer.
Earlier I mounted the CD and installed the OS and did some installations also.
Now I am not able to mount. It's not connecting.
When I ...
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Force generate a new session or lock a session ID to a client when using the same login for Windows Virtual Machines versus taking over empty session?
Situation
Our engineering group generates new Windows VMs from a template that uses a generic admin user. Through the course of a project that user is used in multiple, parallel sessions by several ...
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Possible to create a Virtual Machine in linux and specify IOPS?
I would like to create a few VMs with different max IOPS - e.g. 100, 200 and 500 - for various bench-marking tests.
I have tried VMWare Workstation Player for Linux but it does not have options to ...
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Detecting hypervisors in Puppet
Puppet provides a fact vitual which is supposed to show what virtualization method a system is using. We use Redhat 7 and 8 for guest operating systems. We have a lot of physical systems, and also use ...
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Cannot install virt-manager, python dependencies
I have a debian 11 machine, I installed KVM on it, and I would like to also install virt-manager, but I got :
The following packages have unmet dependencies:
python3-libxml2 : Depends: libpython3.7 (&...
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Firewalld port forwarding Proxmox makes port unusable for other connections
I have a server hosted by hetzner with a single public ip address which runs proxmox and some VMs. This ip address is configured inside /etc/interfaces like this:
auto enp35s0
iface enp35s0 inet ...
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745
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Disk Event-ID 32 in server with Hyper-V virtual machine
We have a server running on Windows Server 2012 R2 and it hosts a Hyper-v virtual machine (configuration: Windows 10, version 20H2, min 16GB & max 32GB RAM with 4 processor cores) . We notice in ...
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If a user runs libvirtd inside a docker container, is there any way to discover the user's VMs?
Potentially naive question that I'm hoping some cgroups experts can answer quickly:
Assuming the following docker workflow was run by Linux user joe, how can the system root user determine that a VM ...
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MS Access database across small company LAN: NAS vs virtualized Windows Server
I'm currently developing a small sized Windows application.
For compatibility reasons, I'm limited to use MS Access as DB "backend" (migration to SQL Server planned but not doable yet).
In ...
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Can VMs run on raw HW or do they neeed an OS? [closed]
I have a general question about Virtual Machines.
It is not clear to me if I need an operating system at the lower level and then install the VM and on top of that the rest or I can install a VM ...
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Can I host ONE VM from two servers? [closed]
looked around for a bit and I could not find a definitive answer. My setup is for educational purposes as I am in a CCNA/Cybersecurity program thru my college.
Anywho lets get down to it~
PC A is ...
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How to determine disk image file format: VMDK, VHD or raw file format?
Is there any shell command using which I can determine the format of a disk image file? I want to check that disk image file is in which of these formats: vmdk, vhd of raw file.
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Is it possible to run a virtual machine with the combined processing power of multiple physical machines? [closed]
I have two physical servers, can I launch an instance using all the resources from my servers ? Or are the ressources of my VM limited to one physical machine ?
And if this is possible, how can it be ...
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Why virtualization still used instead of containers? [closed]
In 2021 era of containers, cloud providers still use hypervisor to make it possible to use more of a system's available resources and provide greater IT mobility since the guest VMs are independent of ...
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Proxmox CTs and VMs lost network connectivity
I have a a Proxmox setup on my home network which was working fine up until yesterday when the network connections in all virtual machines and containers stopped working. I believe this was after ...
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Firecracker vs ACRN?
What is the main difference between the ACRN and the firecracker hypervisors ?
As I understand, ACRN
The ACRN Hypervisor is a Type 1 reference hypervisor stack, running directly on the bare-metal ...
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Can I achieve this VirtualBox network configuration using libvirt?
I asked a similar question here but I messed up logging in with my SE account and so I can't edit it.
Here is what I would specifically like to achieve with libvirt under the "Internal Network&...
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my bridging configuration on freebsd 13 ins't properly configured because any bhyve VM based on Ubuntu 21.04 and Windows 10 can't connect to internet
I've configured the bridging and the tap interface on freebsd 13 because I want to boot and use a bhyve VM based on Ubuntu 21.04 and Windows 10,but unfortunately,after several readings and help ...
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linux page-cache size (host) performance impact to Virtualbox VMs
i have a small Virtualisation host that runs 7 Windows 10 and CentOS VMS.
The host has only 32GB RAM and that RAM is nearly used by the VMs memory and the linux host OS. There are about 2,5GB RAM left ...
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How to set machine state: poweron with community.vmware.vmware_guest_powerstate task?
I'm pretty new with Ansible so I might configured things wrong
[I have a Docker container running Ansible service in CentOS8
I have an Ansible repository that include the Ansible files (this is a ....
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why ansible doesn't recognize the vcenter windows machines?
I'm pretty new with Ansible so I might configured things wrong
[I have a Docker container running Ansible service in it
I have an Ansible repository that include the Ansible files (this is a .Git ...
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1
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ansible doesn't find the role mentioned in the playbook
I'm pretty new with Ansible so I might configured things wrong
[I have a Docker container running Ansible service in it
I have an Ansible repository that include the Ansible files (this is a .Git ...
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1
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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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use ppp for Internet for netns
Use of
ip r add 0.0.0.0 via 172.20.10.10 src 10.0.100.10
GOT:
Error: Invalid prefsrc address
How to fix this?
Goal:
netns (host) => ppp0 => Internet via ppp0
My config:
/home# ip netns
ns2
ns1 (...
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Linux server migration to Windows workstation
I'm on a remote site where an incident took down most networking equipment. I have a basic background as a programmer, not in network engineering/virtualisation.
Situation
About half of the network is ...
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How to run Docker on an Azure Virtual Windows 10 machine [closed]
I am provided a Azure Virtual Machine with GPU support (Standard NV6_Promo (6 vcpus, 56 GiB memory)). I want to run AutoML on this machine, which only runs on Linux. Their installation documentation ...
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I want to build a virtual web server from python. Where do I start? [closed]
I use Python, and I'm familiar with its capabilities and syntax. I want to create a web server that can receive and send JSON data packets. Sorry about the short question.
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Middle sized company server architecture
I am designing server for middle sized company which should offer services as accountancy software, property record software, file server etc. My idea is using Hyper V server as type 1 hypervisor. As ...
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Can ssh into Ubuntu 20.04 virtual machine but domifaddr shows no IP
I created an Ubuntu 20.04 virtual machine following this guide.
I am able to ssh into the virtual machine using the IP address I wrote in the network-config file, i.e., 192.168.122.101, however, when ...
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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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How can I optimize ksm for my machine - 100% CPU usage and limited KSM Sharing (Proxmox)
KSM is constantly at 100% CPU usage which makes me believe I need to optimize the /etc/ksmtuned.conf configuration but I am not exactly sure what to set it as for this machine. As you can see from the ...
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Hetzner Vlan connectivity between VMs inside dedicated server connected on Vswitch
I have multiple dedicated server with hetzner and connected to one vSwitch. I can connecte the dedicated servers on vlan using vswitch. But I am struggling to connect virtual machine inside dedicated ...
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Shared storage for KVM server cluster?
I have Dell EMC SCv3020 Storage Array and I want to create shared storage for all 3 physical servers to use the same (LVM?) for creating KVM VMs in cluster so if 1 server dies, we can move VM to ...
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ESXi 5.5 (free) to Hyper-V Black Screen-Cursor Blinking
Recently came into an environment where Free ESXi 5.5 is being used. I'm on a project to move VM's in ESXi to Hyper-V, however, I'm running into a problem regardless of what tool I use to import to ...
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Use network bridge as default network in libvirt
I created a network bridge virtbr0 with my NIC enp1s0f1. The bridge gets an ip address from the router via dhcp. i would like to use the bridge as default network in libvirt to also get ip addresses ...
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How to limit packets per unit time on a particular interface (for vms)
I am using kvm and virtuozzo virtualization on my servers and each having 10 vms.
I have to restrict DDOS attack from my VMS (i.e prevent VM from doing DDOS attack), I search on net and found that I ...
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File open/copy extremely slow after VM moved to new host
I shut down and exported a Hyper-V VM from one host and imported it to another (did it with several actually). However only my 2 VMs still on 2008 are acting really odd. They are running Server 2008, ...
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Current single system image solutions
I'm designing a cluster for a small research institute. Since our computations require a large amount of memory, I'm looking for a solution that will allow our applications access to the whole memory ...
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LXD Container IPv4 Interface Management
Ubuntu 18.04.4
lxd 3.0.3
lxc 3.0.3
I have had several containers running without issue for a long time. Today I was making changes to my network and one of the containers picked up a DHCP address.
...
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HOW : single VHD shared between 2 different VMs
I need to share single VHDX with 1 large partition containing no OS, just plain files (mainly pictures) and promote it to 2 different VMs with 2different OS at 1time :
VM Windows with stock keeping ...
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Best practice for configuring a complex virtual network with multple links and multiple virtual machines
I have a somewhat complex virtual network setup with multiple virtual machines and the links between them. There are perhaps 40 ip commands to set it up which (if I read the docs correctly) need to be ...
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