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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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Centos 7.3x & 7.4x VM's fail to bringup login service and network manager after a yum update and restart

I'm running into an odd problem that I've never encountered before. On any of our Centos 7.3x or 7.4x after I do a yum update and restart the VM will eventually come back up, but hangs during the ...
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Imbalanced IRQs on virtio devices

I noticed in the top on my linux server that one cpu had far more number of software interrupts than all other 7 cores. Digging further, I noticed that this core is pinned to a particular irq which ...
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17 views

TeamViewer 14 in Virtual Machine

When I install teamviewer_amd64.deb in a Debian VM it installs with no error. I start "teamviewer" and I see this: $ teamviewer Init... CheckCPU: SSE2 support: yes Checking setup... Launching ...
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My laptop is being recognized as a virtual machine but I didn’t download or do anything? [on hold]

My 2018 Microsoft surface laptop is being recognized as a virtual machine when I’m trying to download an exam software. It didn’t do that before and all of a sudden it is. I didn’t download anything ...
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0answers
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10 Virtual Machines on a dedicated server [duplicate]

I want to deploy 10 virtual machines on my dedicated server. I purchased 4 servers with these specifications: Intel 2xE5-2430v2 My question is, with this spec, will I be able to deploy 10 virtual ...
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1answer
16 views

Access to the Docker containers

For example I have Host Machine HM (Mac OS). Inside HM I have installed Virtual Box that contains one virtual machine (boot2docker) VM1 (192.168.99.1 at my host interface). Inside VM1 I have docker's ...
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1answer
24 views

EXSI 6.7 Multiple Subnets

I'm new to VM's as I've always setup physical servers in the past. I have installed VMWARE EXSI 6.7 on my HP server and I've setup 2 VM's. One is for a SCADA system and the other is for a ...
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1answer
28 views

Why would you activate Server Standard edition on a Datacenter Edition host?

Windows Server Datacenter Edition allows many things to include Automatic Virtual Machine Activation (AVMA). Using AVMA, you can activate equal to & lower & older editions than the host. I can ...
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QEMU crashed while trying to boot up i.MX6q device kernel

When tried to boot up Kernel uImage of an i.MX6q based embedded device, it seems that QEMU crashes with "Unable to handle kernel NULL pointer dereference at virtual address 00000044". Before crashing ...
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1answer
28 views

How can I make a local ISO on a Linux server available to a VMware ESXi/vCenter virtual guest via the virtual CD/DVD?

Current Method In the past I've done this by copying the ISOs to a Windows desktop then using the vCenter client to upload the ISO to a temporary datastore location on the ESXi server, then using "...
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Windows Server 2016 Hyper-V Role connection fault [on hold]

I have a Hyper-V server (Win 2016) which has been set up and the V-Ethernet has been configured as an external network and allowed to share with management OS network. The vErthernet has a static IP ...
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Virtual Box Bridged Adapter can't Ping Host < OR > Guest [migrated]

I have a windows 10 Host machine running Virtual Box 5.2.22 the IpAdress is 192.168.1.24 mask 255.255.255.0 (class c). I have a guest OS windows 10 with IP 192.168.1.252 mask 255.255.255.0 (class c). ...
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1answer
51 views

Can't migrate VM in vSphere

Our Vsphere interface looks like this: So what we want to do now is above the servers folder there is a virtual machine called vvc3 (this is the VMware vCenter server appliance) We want to move that ...
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0answers
26 views

newly deployed Azure VMs can't not activated [closed]

our company deployed several Azure VMs 80% of those cannot be activated it. VMs come with SQL are ok, does anybody experience this kind of issue?
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2answers
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Hosting VMs for a final exam [closed]

I want to host 20 copies of the same VM for a final exam I am giving in a Computer Science class. The campus resources have proven extremely unreliable and I'm looking for alternative solutions. ...
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1answer
47 views

Prevent VM clock running faster than it should

I have a unRAID 6.6.5 server with perfectly correct time and multiple Linux VMs which used to be perfectly synced too. I rebooted one of my VM and suddenly the clock goes twice as fast as the hwclock. ...
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1answer
16 views

Create Azure VM from Snapshot if Disk Deleted Possible?

We deleted a VM as it was no longer needed. Prior to deleting we took a snapshot. The VM hard drive (OS) disk still exists but we're looking to clean up unused resources. If I delete this disk, can I ...
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21 views

/var/sys/deamon taking all of the CPU

We have Jenkins-instance running on Azure VM. Recently the VM has been running almost nonestop 100% CPU because of process I can't seem to find any information on. using glances the process or command ...
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1answer
46 views

Last powered off date for a vm in Hyper-V 2016

In Hyper-V 2012 when we had the configuration of a vm in the xml format, one could look up the last_powered_off_time node in the vm's configuration .xml file: <last_powered_off_time type="integer"&...
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1answer
17 views

Systemd - running custom VM shutdown script before the standard libvirt-guests.service

On a KVM host I have a few VMs with legacy OSes that do not listen to ACPI shutdown event. As it happens on Debian 9.5 host, on shutdown the libvirt-guests.service waits for 5 minutes for each such VM ...
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29 views

IPsec connection to a Linux VM with StrongSwan running on a dedicated Windows host

I have a dedicated root server hosted by a certain provider and it has a public IP address "1.2.3.4" (I will use this dummy IP in the following description of the issue I am facing). Host server has ...
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1answer
70 views

I can't connect to my VM on Google cloud

I can't SSH my VM server, every time I tried it failed, please help: I can't connect to it via the browser, the error code is : (#79) I also can't SSH to my server via SSH client See Connection error ...
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1answer
50 views

Azure OS-Included VM Image - Windows Server 2016 Remote Desktop Session Host Concurrent User Access (CALs required?)

I want to set up an Azure VM that can be accessed by at least 5 users concurrently. There is an OS-included Azure VM image option for "Windows Server 2016 Remote Desktop Session Host 2016". When ...
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2answers
150 views

Looking for way to expose and extend 100s of USB connections from VM cluster(s)

We currently test a very large number of devices and we have one PC per 10 devices or so (we use two USB hubs per PC to break out to the devices). We have huge number of PCs and it's turning into a ...
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1answer
101 views

TASK ERROR: command 'systemctl start pve-container@102' failed: exit code 1

I executed this command apt update && apt upgrade. After that, all container start except the ftp container. Launch this error: Job for pve-container@102.service failed because the control ...
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2answers
40 views

Is it possible to change the Azure VM OS for Azure VMs where the OS is included in the pricing? (Windows)

I have an Azure VM that was created with the OS included in the price. Is it possible to upgrade the same VM to a newer OS (e.g. one that would also be included in the VM price)? Specifically, I ...
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1answer
64 views

Very poor network performance in HyperV connections routed via a VirtualSwitch vEthernet NAT interface

I have a ubuntu 16.04 LTS guest VM running inside HyperV on Win10 pro v1803 (build 17134.345). The guest does have internet connectivity through a Virtual Ethernet Adapter NAT on the host, but ...
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0answers
30 views

What factor impact network speed between VM significantly?

There is question about network between different server,but i got a different situation. I have two VM in a server,and I tried to test maximum network speed between two VM. OS : CentOS VSwitch ...
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1answer
311 views

Windows Server 2016 Datacenter VMs running on Hyper-V Server 2016

I misread something or I'm doing a terrible mistake here, hopefully you guys can help me. I have set up a Hyper-V Server 2016 on my physical machine (or bare metal as it's called) which has 1 ...
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28 views

One public IP - forward multiple ports to VM

I have stuck with my VM network settings. I have Windows Server with accountant software on it, and also want to have VM with telephony PBX (linux) on this server. Problem is I have only one public ...
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1answer
66 views

Windows server 2016 restart randomly after installing active directoy

I have a virtual machine with Windows Server 2016 on it, after installing active directory it starts to restart randomly. I tried installing windows from different sources. I tried in another host. ...
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1answer
59 views

Azure Point-To-Site VPN subnetting issues

I'm currently having some issues with connecting the VPN to my Vnet properly. The Virtual Network is called MGS-vnet with an address space of 10.0.0.0/8. It contains 2 subnets: default with an ...
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1answer
66 views

Creating a Zabbix item on the zabbix server to ping agentless host machine where vm (with agent) runs on

We're working with Zabbix (2.4.7), i'm going to call this the zabbix server. The zabbix server has many machines which it is monitoring. The machines have zabbix agent installed on them. The machines ...
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1answer
44 views

Hyper-V virtualization with google compute engine image

I am trying to download an image from my Google Compute Engine VM Instances in Google Cloud Platform and I'm following this article to export the image to a GCS Bucket and download it locally. I need ...
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1answer
11 views

Access host virtual machine from docker container

I have two docker containers in a bridge network which can talk. I want one of them to be able to talk to a hyper-V vm. This is the ipconfig from the vm: eth0 Link encap:Ethernet HWaddr 00:15:...
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0answers
24 views

VMs randomly dropping network connection overnight

We have 3 VMs randomly dropping network connections overnight, like the title states. Disabling then enabling the NIC fixes the issue. Our environment is running ESXi 6.5 VMTools versions are 9.4.5 ...
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1answer
48 views

VM migration from on-prem into an Azure Availability Set?

As the title asks; is it possible to migrate an on-prem Windows VM, hosted in an HA hypervisor cluster, into an equivalent Azure HA architecture ? Over several months I have migrated dozens of ...
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1answer
109 views

Azure domain joined VM DNS settings issue

I have got an on-premise AD-DC which I am trying to extend to Azure. This server hosts the DNS services as well. I created a VNet on Azure and set its DNS server property to point to my on-premise ...
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0answers
46 views

How to move a physical Ubuntu install -> image -> install proxmox VM on same machine and spin up that Ubuntu image on Proxmox?

So I have a physical server with Ubuntu 18 Server runnning on it. I want to use this hardware to run Proxmox now though. This server, however, is relatively important and too much work manually ...
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1answer
18 views

Outbound routing on Azure VM

I have a test VM in Azure, private IP 10.0.0.4 running an IIS site. I have a Watchguard firewall VM in Azure with two interfaces, one has a public IP and a private IP of 10.0.1.2. The other ...
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2answers
88 views

How many VMs can I install on Windows Server 2016 standard?

With 1 Windows Server 2016 Standard (WS2016s) license (running Hyper-V) installed as host on a physical machine, how many VMs can I install on that machine? Is there a limit? Could I install 10 ...
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1answer
35 views

xfs_db reports high file fragmentation where VM is located, but VM shows almost no fragmentation

I have several libvirt VMs stored on xfs partitions and am using gluster to replicate the storage. The VMs use qcow2 for storage. Some of the partitions where the VMs are located indicate high file ...
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1answer
66 views

Need to upgrade Azure VM Standard HDD to SSD?

I've got an email from Azure : "Adjust your disk throughput or upgrade to premium disk storage. You’re receiving this email because you’re running infrastructure as a service virtual machine (VM) ...
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1answer
28 views

Unable to reach Azure virtual machine on port 9000 for Sonarqube installation

I'm trying to install sonarqube@7.3 with postgresql on a Debian 9 Stretch virtual machine hosted with Microsoft Azure. Everything works properly except that I can't browse with my real physical ...
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0answers
37 views

Issue with resizing disk on VMware VSphere

I have expanded a virtual disk for a Centos 7 virtual machine to 100 GB size. Then I used Gparted to add the unallocated 30GB to the /dev/sda1 partition. But when I execute df -h the new size of ...
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1answer
17 views

Can I replicate an Azure VM while the said VM is still running? or Will the VM stop while replicating?

I have and Azure VM which is quite critical as it is running services. I wanted to replicate that VM. My question is, Can I replicate an Azure VM while the said VM is still running? or Will the VM ...
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1answer
52 views

How to troubleshoot a timed out error on putty when connecting with ssh on a azure virtual machine

I just came out with a nice Debian 9 "Stretch" Virtual Machine hosted with Microsoft Azure. I've already used PuTTY, PuTTYgen and Pageant to connect with ssh to it and i've saved all this ...
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0answers
46 views

How to run a script/command at only the “first” boot once on Windows Server 2016?

I've been looking around everywhere but couldn't find anything relevant. I have a pre-configured Windows image that I would like to deploy on a huge number of VMs and I want a specific script to run ...
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0answers
50 views

dircolors: no SHELL environment variable, and no shell type option given

On interactive login I get: dircolors: no SHELL environment variable, and no shell type option given But I do have SHELL variable set: % set | grep SHELL SHELL=/bin/bash SHELLOPTS=braceexpand:emacs:...
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1answer
121 views

How I increase GPU video RAM in virt-manager?

I have this text in my XML <video> <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' ...