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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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Can I increase Azure Linux VMs TCP keep alive timeout without using a Load Balancer?

I have an Azure VM running Linux (Ubuntu 18.06). I'm running a Python socket server there. Now, the problem is, any socket client which is not doing any activity for 4 minutes is getting ...
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1answer
42 views

Infrastructure - different variants. What are the advantages of the virtualization layer? [on hold]

The infrastructure that I see most often: First infrastructure Can I manage the infrastructure equally effectively using only Container-Optimized OS, management and monitoring tools (e.g. Ansible...),...
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1answer
32 views

Moving a hard drive from one Azure subscription to another

I have a Windows 2008R2 virtual machine in Azure with an extra 1TB HDD data disk attached. Can I detach the HDD and move it to another subscription and attach it to a Windows 2016 Server VM that I ...
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1answer
18 views

Azure Windows VM set up auto-start/shutdown

I'm just getting stuck at adding permissions for the automation account required to perform the auto-shutdown/startup for this Windows VM. So I'm at https://docs.microsoft.com/en-us/azure/automation/...
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20 views

Is a Hyper-V Container somewhere between a docker container and a virtual machine?

We know that Virtual Machines have a full OS with its own memory management installed with the associated overhead of virtual device drivers. In a virtual machine, valuable resources are emulated for ...
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1answer
23 views

NTP Servers Not Syncing At Boot

Backstory: I have a couple of internal startum 1 NTP clocks with GPS receivers, and 2 public NTP servers that are virtualized on top of VMware ESXi which take time from the S1 clocks and distribute it....
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0answers
21 views

SSH tunnel to share local virtual machine's VPN connection with host? [closed]

I have a local VM running windows 10 on a mac. i use this virtual machine to connect to a VPN. Is there a way, such as an SSH tunnel or something, that I can use the virtual machine's VPN connection ...
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1answer
24 views

How to create azure vm instance on a dual boot linux machine? Is the procedure same as we do it on a virtual machine?

I want to create an azure vm instance anc access it through ssh. But I have a dual booted linux machine. So can I do the same on a dual booted machine or I need specifically a virtual machine to ...
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12 views

Hyper-V Virtual Switch not recieving any packets

I have a virtual machine set up with two network cards, one card is connected to a virtual switch for connection to the main network, the second is connected to another external port on the host ...
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0answers
21 views

Why open files limits set correctly on dedicated server but not on KVM machines?

I have set open files for all users on a dedicated server A in /etc/security/limits.conf like below: * hard nofile 1048576 * soft nofile 983040 And in /etc/pam.d/common-session I have ...
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22 views

internal serial error in Azure serial console

I just installed https certificate via Letsencrypt after that i'm not able to access the serial console in Azure VM as well as via SSH not able to connect. Can you explain me what is the exact problem....
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61 views

Issues booting VM

I am new to Linux, and have inherited a VM that is running centos. It sat idle for about 2 years with no-one touching it. I have run some updates to get the system up-to-date. I think I accidentally ...
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1answer
28 views

ESXi VM to Physical server on the same hardware

I have a Physical server running ESXi 6.0 with a single 64Tb Datastore, One of my VMs has grown to almost 50Tb on this host. I think at this point the best approach is to convert the VM to take over ...
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2answers
48 views

High Active(file) Memory Usage in Oracle Linux VMs

I recently searched and read lots of posts and questions about Linux memory management but I can't find my case. For example, there is a question in Unix StackExchange about High memory usage but no ...
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1answer
17 views

Cannot increase disk space of a esxi VM

I wanted to increase the disk space of a VM in my VMware server esxi. I deleted a snapshot that was in the VM, but I canceled this operation unintentionally. Now, I can't see the snapshot in ...
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1answer
18 views

Setting up a dns server with a virtualbox vm running Ubuntu and making it accessible via vlans

I have a virtual box vm I want to use as a dns server for my local network. I have a few vlans setup. The vm host is 10.0.50.2 The vm is 10.0.50.4 I want to keep everyone out of the 10.0.50.4 network ...
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1answer
47 views

Access Localhost (Ubuntu -VM) from Windows

I use Ubuntu in my virtual machine and start from there my code projects. These project when active can be run under localhost:3000. Now when i execute in Ubuntu ifconfig I get following result: If ...
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1answer
42 views

Ping inexistent IP

I created an internal connection from my Debian VM to Metasploitable, i tried to ping Metasploitable's network address and it works, but when i tried to ping a random inexistent IP i was expecting the ...
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34 views

How to run user commands in conf module of cloud init

I want to run a command when an instance is booting up. This command is for accessing an internet (login script). But this command is run at very end in final module of cloud-init. And in other ...
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0answers
13 views

Intermittent: Boot Manager sometimes displays, offering only one OS

Sometimes, upon restart, our PDC will boot into Windows Boot Manager, even though there's only one OS installed in the VM: Here's our BCDEDIT output: C:\Users\Admin>bcdedit Windows Boot Manager -...
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1answer
52 views

validating virtual machine host automatically with fingerprint and something else

validating virtual machine host automatically with fingerprint and something else I've been researching various methods to validate a remote ssh server (virtual machine) automatically and remotely. ...
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0answers
32 views

Vagrant virtual hosts/shared folders not accessible

I currently have a vagrant box with CentOS 7. In my Vagrantfile I have the following configurations: config.vm.box = "centos/7" config.vm.provision :shell, path: "provision.sh" config.vm.network "...
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41 views

Test Environment Restoration Questions

I am currently deploying a few separate environments into Azure (Dev, Stage, Test, etc.). Some of these will need to be restored to their original state later down the line, for example, test may ...
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4answers
285 views

MySQL on VM, High IO Wait but low TPS

We are trying to figure out a strange situation on our MySQL installation on VM. We are on Mysql 5.7 and RHEL 7 with XFS. We are observing when we run a few select queries the IOWait races up to 40-...
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1answer
51 views

Google Compute: Weird error on moving VM instance to different region

Since my Google Compute VM instance randomly stopped working because the current region "does not have enough resources available", I rationally decided to move my VM instance away from the probable ...
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1answer
34 views

Azure Portal VM ARM Template Deployment With KeyVault

I want to deploy a VM in Azure and store the local admin password in Keyvault. I was wondering if it is possible to do the deployment through the Azure Portal? I've added the required info to my ...
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0answers
70 views

Azure linux VM Port not open

Im trying an ubuntu linux vm on azure, and need port 9001 to be open on inbound. but cant reach the vm from outside on other ports than 22. I have enabled firewall in linux vm and have opened those ...
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0answers
60 views

Sluggish Linux VM's on Hyper-V

I am experiencing very sluggish response with Linux VM's (Debian Gnome 3.30.1 64bit) running on Hyper-V on a Windows host (Server 2012 R2 64bit). Slugglish being any movement around the screen, mouse ...
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2answers
29 views

In Azure, how do i set a subdomain to a separate VM?

I have an Azure VM that hosts mycompany app at mycompany.com. I'd like to have different VMs for each subdomain created like client1.mycompany.com. What i tried to do already was to have separate ...
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0answers
69 views

QXcbConnection: Could not connect to display Aborted on Google Cloud VM Instance?

Am getting the above error when I try and run an executable on a VM Instance on Google cloud: ./raven-qt QXcbConnection: Could not connect to display Aborted  Getting this error when running raven ...
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0answers
15 views

Using fiddler as a proxy for emulator to capture local traffic, rerouting gateway

I am currently working in a Virtual Machine environment using VMWare Workstation pro 12. I plan to capture network traffic from a mobile application. I am currently using Nox App Player with Android 4....
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1answer
67 views

Are there special prerequisites for installing Docker inside a virtual machine running debian stretch?

I am trying to install Docker inside a virtual machine running debian stretch that i was provided access to by my company. Searching through forums i read many posts claiming this is working out-of-...
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1answer
43 views

Is it poor practice to have db and site on different vms on same physical box? [closed]

I am not too familiar with how virtual machines work but I was planning to have two physical machines each with two virtual machines on each physical box. What I wanted to setup is a test environment ...
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1answer
41 views

Azure VM Site Replication

I'm looking to set up site replication for our Azure VM's. My question is this, how often are the VM's backed up/replicated to the DR site? Is this replication automated or would I need to kick off ...
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1answer
27 views

Recovering From Safe Mode

I changed the boot settings of my VM to safe mode, but I forgot to keep networking on. Now, I can't connect to it. How do I fix this?
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0answers
95 views

Wireshark running on Host OS not capturing packets from VM

I have Wireshark running on my laptop (Ubuntu 18.04), and I also have Wireshark running inside a VMware Workstation Player with a Backtrack 5 Kali Linux virtual machine image. The VM Network ...
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1answer
46 views

Vcenter + can we update memory online in spite Hot-add feature is disabled ,

Hot-add feature is disable in the vcenter therefore we need to shutdown the Linux OS in order to update the memory. Since we cant shutdown the linux machine, and we must increase the memory of the ...
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1answer
114 views

Is it possible and how to download an Azure VM to local machine?

I have a VM on Azure, it has many websites and databases with configurations which make it a little tricky to export everything from there. Now I don't want any of these website to be running and for ...
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2answers
39 views

VM image vs Phyical server image?

I often hear its easy to create the image of one VM and setup it another VM(even instance types are of different types) than creating the image on physical server. In fact one of the devops guy in ...
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0answers
21 views

Add route rule for specific destination

I have a VM, say A, that is set as the default gateway of another VM, say B. In other words, the default gateway of B is A. On VM A I have this virtual interface, on which VM B is connected. The ...
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1answer
39 views

Storing Xenserver VM Snapshot UUID as a variable in a shell script to create .xva files from snapshots

I was looking at this question which was asking something sort of similar for help and is the closest thing I could find to helping, but it doesn't solve my issue: export XenServer snapshot as file ...
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0answers
21 views

Azure Site Recovery Service Principal Fails During Creation

I'm trying to setup up Site Recovery in my Azure Recovery Services Vault. The plan is to have selected virtual machines replicate to a secondary region like Arizona or Texas. I created my vault (in ...
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0answers
42 views

Windows 2012 R2 server on Azure hangs for about 20 minute every week

We have a Windows 2012 R2 server on Azure and it hangs for about 20 minutes every Tuesday morning. When the server is hung, we noticed: 1) Most of the IIS (web) requests are not served. 2) No new ...
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0answers
57 views

VM Size not available for any image and in any VM region

I created a new account with Pay-as-you-go subscription. I'm not able to create a VM because VM size is not shown for any Image. When I click on Select Size it is showing the following message ...
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1answer
45 views

Google Cloud Platform, Deployment Manager Project, changing the VM instance

We have used the Deployment Manager to create a website from the Wordpress (click to deploy) LAMP server. We have have since recreated the VM instance a few times and also connected another VM ...
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0answers
16 views

How to grow a striped data disk volume in an Azure VM?

I have to extend a striped data drive on a windows server 2012 R2 VM hosted in Azure. The existing drive is labeled in windows as F and is a striped volume consisting of two 150 GB SSD's. What's the ...
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2answers
4k views

What if I store 10TB on azure servers and then keep the vm powered off?

I want to know should I pay for storage on azure even if I don't use it? for example if I store 10TB on an azure VM and then keep that VM powered off, Will Microsoft charge me for that 10TB data? Or ...
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1answer
41 views

Accessing Bottle webserver VM form Host

I have an Ubuntu VirtualBox VM running and Bottle webserver on http://0.0.0.0:8080. How can I access this on my host (OSX)? I want to do this because accessing the web server using FireFox on the VM ...
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0answers
59 views

Terraform code to connect Azure Storage to VM is not working

I dont understand why the storage account is not getting connected to VM. I am not getting any errors & storage is created, but remains unattached to VM. provider "azurerm" { version = "=1.22.0"...
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1answer
37 views

How Is A Free Account Charged When Using Microsoft Azure Products?

I can find this answer right away by searching the price of each product when in use. However, it is only a general price but not completely detailed. I posted this question only for more details on ...