Questions tagged [virtual-machines]

A virtual machine (VM) is a completely isolated guest operating system installation within a normal host operating system. It is a software implementation of a machine (i.e. a computer) that executes programs like a physical machine.

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Server is down after changing machine type in Google Cloud Platform

I changed my machine type(GCP) by stopping the instance, after increasing the machine type I restarted the instance and now server stopped working, the website is down now. Upgraded from 1 vCPU, 1.7 ...
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Is it possible to SSH to VM via localhost in Bridged mode in VirtualBox?

I have a Bridged mode set up in VirtualBox. I can SSH to my Virtual machine this way (from my Windows machine to VirtualBox): ssh root@192.168.0.105 However, when I try to SSH to VM via localhost (VM ...
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Proxmox - redirect all ports to a specific vm

I wanted to ask if it would be possible to access all ports of a virtual machine using a subdomain. As a small example: host: 10.0.2.1 VM1: 10.0.2.2 VM2: 10.0.2.3 As result: vm1.example.com:any -> ...
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MALWARE EN VIRTUAL MACHINE [duplicate]

I have infected my virtual server with a ramsomware that modified my files. Unfortunately I have neither image nor copy of the disc. And I wanted to know if Google makes external copies for possible ...
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Forgot SR in XOA, Reattached, VDIs not being found

I had a few VM disks on a NFS SR and for some reason FreeNAS would not let the hosts connect anymore. Doing as I did before, for different reasons, I forgot and then re-added the SR and FreeNAS let it ...
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How to automate VM deployment + configuration without too much overhead

This question is more intended to get some advice. I'm sure there's no straight answer to it. Situation Our internal IT department is responsible for the creation of VMs (mainly Windows Server) that ...
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2answers
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avoid redundant writing of virus scan signatures in VMs on same disk

I have two VMs on the same disk that each have clamav installed. Both regularly run updates for the same virus scan signatures simultaneously which results in an unnecessary strain on the performance ...
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1answer
46 views

Host resources management - vSphere Client

I'm using vSphere Client version 6.7, having 2 hosts in a cluster. i want to know before i'm entering one host into maintenance mode, if the other host will be able to hold both servers resources. yes ...
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Azure VM, unable to connect from internet on ports configured (9089-9095)

I have created a VM on Azure with below steps:- Created VM Assigned a public static IP Created a new Virtual Network (Subnet default - (10.0.0.0/24) Did not create a NSG initially (NIC NSG was NONE - ...
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Forwarding a ttyUSB0 device to a VM across the internet [closed]

I have some legacy (but still very much functional) elevator control equipment installed in the buildings throughout my campus, and on occasion, I need to run a windows application to adjust a ...
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Package docker or VM host application and VM instance in single installable package?

I'm looking for the possibility to package up a VM instance and the VM host application in a single installable package, removing from the user visibility that they're running e.g. docker, or some VM ...
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MariaDB install failling on Debian 10 based VM

Trying to simply install MariaDB server on Azure Debian 10 VM host However it fails during the process I had tried few different ways but it seems to get stuck somewhere in the half way The last i ...
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How do I manage xen-hypervisor using virt-manager client?

I've installed xen-hypervisor 4.11 on my debian 10 desktop. But, when I add xen connection to my virt-manager it shows this error. Unable to connect to libvirt xen:///. Failed to connect socket to '/...
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Is pausing/suspending VM into memory for long periods (months) recommended?

I am running KVM with some Ubuntu VM's as guest machines. The guest machines contain an application that does not need to be run most of the time, but once every few months, there are unexpected, ...
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How to properly setup VMs for testing (personal test) [closed]

So both of my testing VMs are on the same laptop and both of them are running Windows Server 2019 and both of them are on the same SSD. Basically, I need to test performance when the SQL database is ...
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Compiling and running untrusted code on a server

In teaching CS, students submit their code to our server and we compile and run with unit tests. Similar to Codeforces, Codewars, and HackerRank. How should we be configuring servers for this? Launch ...
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Website access from Azure Classic VM vs new VM

We are experiencing an issue on our classic Azure VM running Windows Server 2012 R2 when accessing www.linked.com. We have some applications running on IIS and talking with LinkedIn OAuth API thats ...
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1answer
47 views

Powershell: unable to create new Hyper-v VM remotely

To simplify our current setup. We have SRV01, SRV02, and SRV03. All Windows Server 2016 with Hyper-V installed and joined to our domain. SRV01 host a shared folder "\\SRV01\VM-ONLINE-STORAGE\Test&...
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BlackListing with VMware firewall rule

I created a linux vm in VMware 6.5 and I want to block some countries that don't have access by linux vm root user. For example I want to block Russia IP's from VMware admin that no one in VM's can ...
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Sizing a Server Build [duplicate]

I run an online training business. I am in the process of building out the specs for a server to host 12-16 Windows 10 virtual machines running configuration software for our students. The software ...
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1answer
497 views

ASR failback fails because boot type UEFI

Our on-premises environment is VMware running Windows Server virtual machines. We are using Azure Site Recovery (ASR) to replicate some of our VMs to Azure. I have been doing some failover/failback ...
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2answers
79 views

Unable to connect to port 8000 on Azure

Description I am using a virtual machine with the Ubuntu image. I tried to run my server on Django with this command python manage.py runserver 0.0.0.0:8000. When I search <public ip>:8000 it ...
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ESXi network behavior host losing connection to LAN

I have an esxi host with 2 virtual machine, if i switch on both VMs my host loses connectivity to the LAN but sill pinglable from the VMs. If i switch off one of the VMs, my Host is pingable from LAN ...
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2answers
53 views

How to migrate physical server to VMware VM [closed]

Using vSphere Client version 6.7, I need to create a new VM that will replace physical server. I'm not sure where to start, I mean, should I create a new virtual switch? Newtork Interface Card? what ...
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1answer
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Connecting with https to a server application on GCE VM through ngrok tunnel

I am observing a strange behaviour with ngrok on a GCE VM. I fire up a 'preemptible' VM instance with static external ip, and start ngrok on it normally. I get the URL that maps incoming https request ...
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I am looking for a way to use email trigger in order to stop/start a virtual machine. Azure Automation?

I am looking for a way to use email trigger in order to stop/start a virtual machine. Like when I enter some kind or a keywork in the subject or the body of an email, the runbook triggers and does the ...
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1answer
26 views

Does Update Managment in Azure (windows VM) take care of starting the vm?

I have a windows VM and update management configured. The machine is off most of the time. However, when i need it, i don't want to wait for updates to be installed. Thus, i configured a schedule in ...
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116 views

Cannot yum install vdo kmod-kvdo

I am trying to install kmod-kvdo and vdo but I get these errors. yum install vdo Loaded plugins: fastestmirror, langpacks, openvz, priorities Loading mirror speeds from cached hostfile epel/x86_64/...
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25 views

libvirt on fedora, qemu/kvm guest, guest can ssh to host, but failed to samba or ftp to host [duplicate]

I am running libvirt/qemu-kvm on Fedora32, guest OS is win10 with spice-guest-tool in use. I use 'nat' mode virtual networking. root@fedora ~]# virsh net-dumpxml default <network connections='1'>...
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Why do cloud compute instances spin up VMs and not containers?

In AWS for example, when I spin up a new EC2 instance, it loads up a new VM, then populate the VM with a container image. This is the reason why spinning up new EC2 instances take 60-90 seconds to ...
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2answers
60 views

How to enable HTTPS for a website running on Azure VM with existing SLL .pem certificate

I am running http://clinicianwiki.com, a non-profit website for clinicians to exchange clinical information. The domain provider of the website is porkbun, which also provides SSL certificate that is ...
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VM downgrade suggested, Applied, Stuck

First timer here question wise so please bear with me if I leave something out... Google Cloud suggested I shrink one of my VM's running wordpress because of utilization, I agreed and after what ...
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Windows Server 2019 Connect Hyper-V Virtual Machine to local network

My Server is configured in the following way: Windows Server 2019 Datacenter Ethernet 1: connected to the router and configured with the Public Static IPs Ethernet 2: connected to the switch where ...
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1answer
79 views

pcie SR-IOV driver howto

I am trying to know how linux PCIE NIC SR-IOV work. I am using a Unbuntu with Intel 82599 NIC as a host. Under NIC driver directory(ixgbe) in linux Kernel, there is a file named "ixgbe_sriov.c&...
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Hot Add feature + how enable the feature without power off the Linux machine

We have a VM Linux server, where the hot add feature is disabled in VCenter. For now, we can't power off the machine, and the feature is disable, so we can't add memory resources to the machine. So do ...
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1answer
358 views

Proxmox & Packer: VM quit/powerdown failed during a Packer build. Anyone have any ideas why?

I am trying to create a Proxmox VM template using Packer. However I am getting a Proxmox error saying Build 'proxmox' errored: Error converting VM to template, could not stop: VM quit/powerdown failed ...
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1answer
54 views

VM instance down suddenly and fail to restart, showing 'serviceAccount' was not found [closed]

I have a Django server running in VM instance, the server working fine before this, but this morning the server was unable to access. So I tried to SSH into the VM instance, but it took a long time ...
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62 views

dokerd Failed to load container mount mount does not exists

GCP AI Instances are suddenly not working The VMs log files could not the mount points What does it means? It is not a VM that we manage, there are part of Google AI Platform Notebooks Jun 23 16:41:16 ...
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1answer
38 views

In cloud VM instances, how to handle ssh host keys?

In throwaway VMs like the ones usually used by companies today in GCP or AWS, every time an instance boots for the first time it will have a new set of ssh host keys created. That means that if an ...
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1answer
32 views

Azure Pipelines deploy user

What are the permissions a user has when on a deployment job? Who is this user (whoami)? It would be really helpful if this user was the default user on my VM (Debian 9) since it doesn't need a ...
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1answer
34 views

azure virtual machine changed the public IP after a stop/start

I had an issue on one of my virtual machines where after a stop/start it changed the public IP address Which was been used by some IOT client devices to reach my server. Now they not able to ...
3
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2answers
201 views

IPv6 on Azure VM

I have an Azure VM and it works fine with IPv4 Tried to directly associate IPv6 to it, but couldn't connect to the outside world, a simple ping ipv6.google.com hung (according to Microsoft, it is ...
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1answer
31 views

Adding more than 32 IPs on a Proxmox (v6) VM

I use Proxmox v6 and I want to add more than 32 IPs (network device) on a VM but via the interface it is not possible. Currently, I go through the Proxmox interface and I go to -> Hardware -> ...
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2answers
72 views

Is it possible to have multiple virtual machines on a single physical machine listening to the same port number?

I am wondering if it is possible to have multiple virtual machines on a single physical machine listening on the same port number. The problem I am facing now is that I have a software that ...
2
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1answer
40 views

Increasing a VM's CPUs beyond the host's CPU count

I recently noted a Hyper-V VM with consistently high CPU usage. It's a terminal server with several people logged in concurrently, all running several apps each. I increased the VM core count, and ...
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1answer
28 views

How to specify a VM is preemptible in a GCP deployment?

I'm working on an in-house implementation of a Google Cloud deployment for a Docksal sandbox VM instance. The sandboxes contained within can be considered ephemeral and can be rebuilt very easily. ...
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0answers
18 views

Getting Current / Active session in Azure virtual machine using powershell(Runbook)

I'm trying to get the current active session in Azure VM through the Runbook PowerShell. If there is no any active session / usage then planning to stop the VM. The problem is, I couldn't able to get ...
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1answer
49 views

What difference between serverless computing and a virtual machine scale set [closed]

What difference between serverless computing and a virtual machine scale set, if the VM is on autoscale? Is there a difference? I'm very new to this but I can't see the difference.
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42 views

Centos 7 - Shrink size of LVM Partition

I have a Centos 7 VM which was built from an OVA template. I have it running under Virtualbox. Issue I have is the VM has a dynamic disk of 200G - but only 4 Gb used. I want to shrink the partition to ...
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0answers
25 views

Passing VPN connection to VM from Hyper V

So this may be an odd and impossible request. The company I work for has a setup where we use VM's on Hyper V. However, some of our VM's require to be connected to a VPN so that a client can access ...

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