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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Building my first server, some questions, include failover iis to active loadbalancer?

I'm currently building my first webserver setup. The specs will be: Server-1 cpu: 6700k ram: 32gb 2133mhz hd1: 250gb SSD (540/520MB/s) hd2: 3x 256gb NVME RAID-5 (2.150/1.260MB/s) Physical Server: ...
3
votes
2answers
937 views

How can I keep important VMs in memory without disabling swap?

VM Host -> Xenon E5-2440 w/ 48G mem... Everything runs CentOS6.5 (2.6.32-431) I have 4 guest VMs running each w/ 2G of memory. Their disk images are local files. The host machine is also running a ...
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1answer
21 views

Error Assigning Availability Set To Virtual Machine In Different Regions

Am I allowed to assign an availability set in East US 2 to a Azure VM in Central US. I am getting this error below but the Availability set does exist in East US 2. { "error": { "code": "...
0
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1answer
36 views

Azure OS Disk says Standard but VM is Premium Disk

I created a VM with premiums storage (DS), but my existing VHD I created it from was on a standard disk. Is this VM still considered premium performance even though the disk says Standard where the ...
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1answer
35 views

Load Balance Azure VM Classic and new Azure VM

Can you load balance the classic virtual machine and the new Azure virtual machines in the resource manager concept?
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1answer
63 views

How to deal with VHD for database storage in a multi VM setup in Azure

I've learned that to have the most available Windows Azure VM setup it's best to create availability sets. My setup would be to have an availability-set for 2 web-VM's and a set for 2-sql-VM's The ...
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1answer
60 views

How to diagnose/troubleshoot tftp timeout

I have 2 VMs. One is setup as a pxe server (dhcpd with a specific subnet and a tftpserver). The second VM is networked with 'vboxnet2' to first VM and it is able to get the DHCP IP as specified my VM1'...
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1answer
25 views

linux + how to verify VM defintion disk after redhat installation

We have couple of Linux servers all them are VM red hat Linux ( and they created by the Vsphere client , ) I want to know how we can capture on the Linux OS the following 1.Thick provision lazy ...
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3answers
1k views

How to backup Azure VM in a Resource Group?

Is is possible to backup or take a snapshot of a VM created with the Azure preview portal in a Resource Group (not classic/CloudService-based ones)? These new VMs are not visible from the old portal, ...
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1answer
20 views

Difference between GPVM and LVM when referencing virtual servers?

I've been advised that there are two types of VMs available for enterprise use, but unfortunately have not been able to identify any resources that can explain what these are. The pricing between the ...
0
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1answer
46 views

azure availability set second VM shuts down first VM

I've got two Ubuntu VMs in one availability set. When I start the second VM it takes a few minutes and the first VM stopps. I'm a bit helpless (beginner) here. Any advice would be very apprechiated.
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1answer
61 views

Recovering KVM VMs when booting from mirrored host OS

Im running KVM on a Ubunutu 14.05 server. The server has 2 1.2TB drives which will each have 1 VM (elastic search nodes). I did a dd to clone the main OS and can boot from either disk without issue. ...
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0answers
16 views

How to use vmrun.exe with out popup VM WorkStation

I need to start and stop multitple VM's on windows OS with out popup VMWare Workstation on starting any VM. I use command line tool "vmrun.exe" with this code -T ws start C:\VirtualMachines\...
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5answers
305 views

Are there any free auto-starting VM products?

I'm looking at creating a few VM's for our small company to be able to move mail/client services/development etc, and have hit a few dead ends when it comes to infrastructure on VM's (for free). I'd ...
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2answers
89 views

Proxmox: Node's load at 70, 2 containers are not responding, but top shows nothing

I got a huge problem. Some of my Proxmox-based LXC-containers are not responding since 2 days if I do not reboot the node. This happens always at the same time in the night (I guess there is ...
3
votes
3answers
568 views

Windows Server 2012 R2 (Hyper-V VMs) - random BSOD

I have a problem. My VMs (Hyper-V) - Windows Server 2012 R2 restart themselves quite often (BSOD: CRITICAL_STRUCTURE_CORRUPTION (109)). Last time it was 11x over weekend. I have new HW, 2x Supermicro ...
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2answers
639 views

Azure VM change OS Disk

I've create an Azure VM in RM and have deleted the VM and Components expect the OSDisk in an Premium Storage Account (Blobs). Now i wouldd like to create an new VM and attach the OS Disk to the new VM....
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1answer
150 views

connect to smtp.gmail: Connection refused

I am trying to send mail via Ubuntu 14.04 version to my gmail ID. Ubuntu is running via VMware on my Windows machine. Please let me know if the above description is not clear as I am newbie in working ...
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1answer
36 views

Virtual Server vs Dedicated Server [closed]

Could experts help me summarily tell me before deploying my web service App? Please. What is the downside of choosing Virtual Server over Dedicated Server?
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1answer
25 views

Should I continue to use MSDTC in my new virtual environment for MSSQL?

In the past I have used a two node cluster setup. All the services (SQL, File Server, App Server, DTC) were passed back and forth within the cluster as normal. Now I take a different approach. I ...
2
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3answers
252 views

Azure Ubuntu VM is completely unresponsive after security patches and restart

I have an Azure VM where I host a number of websites. Recently, I logged in and it needed some security updates so according to this link (http://askubuntu.com/questions/196768/how-to-install-updates-...
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1answer
6k views

Why does ProFTPd stop at Entering Passive Mode on Debian on a Windows Virtualbox? [closed]

I have installed Debian Squeeze on a Windows computer with Oracle Virtualbox. Then I've port forwarded port 21 on the NAT adapter. In Debian I've run: apt-get install proftpd Then I uncommented ...
3
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2answers
653 views

Qemu+libvirt+kvm significant performance lag in VM's

I am troubleshooting poor performance on our new VM host machine which is a Dell PowerEdge R415 with hardware RAID. We've got about 20 VM's running like this: qemu-system-x86_64 \ -enable-kvm \ ...
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1answer
31 views

Make copy of OVA before restoration or not

Good afternoon, When having to restore a virtual machine from a backed-up OVA file, should you select the source as the actual file itself or should you create a copy of the backed up file before ...
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1answer
130 views

On Azure Windows VM, Why do some ports open fine and others do not?

I am trying to set up FileMaker Server on a new Azure Windows 2012 VM (not classic). The step that has me flummoxed is opening the ports. I have created the inbound end points for the three required ...
2
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2answers
116 views

rsync hangs on one big file

Each night I copy several virtual disks with rsync from one Linux Debian computer to another Linux Debian. Most files are raw images with "holes" into them: some parts were never written to, so remain ...
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votes
1answer
24 views

Virtual machine with separate desktop accounts [closed]

On our Centos-6.5 server, I want to install a temporary windows xp guest using virtual machines for windows applications. Thing is, I want to run the virtual machine in background and each windows ...
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2answers
53 views

virsh qemu kvm editing xml has no effect

When I try to add a network section to a kvm/qemu xml, the xml wont update with the information. When I edit the uuid, or make a mistake, i get an error. if i change the memory amount, it reverts to ...
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0answers
24 views

internet connection sharing Hyper-v virtual machine switch

I am running hyper-v. I created a virtual external switch and configured it to be shared with the host and the VMs. However the VMs obtain dhcp information just like the host does: same gateway, same ...
1
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0answers
26 views

Virtual disk backup: rsync alternative? [closed]

We currently use rsync to backup virtual disks to another computer. Rsync is slower than direct copy, but overwrite only modified parts in the destination files. This allow to make snapshots to have ...
1
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1answer
52 views

On a VM is it possible to get the name of the physical computer(thin client running Windows) used to connect to the VM(also running windows)?

Here is the problem I'm trying to solve: At work we have several departments that use thin clients that connect to a pool of VM's. The pool is called general and has about 75 VM's in it. One of the ...
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0answers
59 views

SSH connection Timeout using CHEF

When I run the following code in PowerShell: chef-repo> knife bootstrap windows winrm 172.25.174.27 -x Admin -P 'Microsoft@1234567' -N 'target1' I get an error: ERROR: Net::SSH::...
1
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2answers
55 views

Implications of increasing physical ram of VM

I have a Centos7 VM running under VMware and I'm considering increasing virtual memory in the Centos VM. Currently my VM has 8GB of virtual memory, 6GB of swap and using 0 swap right now. I am ...
1
vote
2answers
15k views

virsh: VM console does not show any output

I have a VM which I can start with virsh. According to virsh dumpxml VM1, this is the allocated pty: <serial type='pty'> <source path='/dev/pts/6'/> <target port='0'/> <...
3
votes
1answer
217 views

How to upgrade multiple virtual machine operating system in VMware vSphere in a data center?

In our data center we have 4 physical server having ESXi 5.5 installed on them. On each physical server there are multiple virtual machines running on them and all of these virtual machines are ...
4
votes
2answers
753 views

Use SSHFS on XenServer 6.1

On Xen Server 6.1, to backup my VMs, I use a script based on the following tools: xe vm-list to build a list of the VMs to backup xe vm-snapshot to take a snapshot of the VMs xe template-param-set ...
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0answers
15 views

Are changes since snapshots still stored as changelogs?

It's been four years. Is the accepted answer of this question about VMWare still accurate? In other words (in case for some reason that link ever breaks), is this still true? When you create a ...
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2answers
67 views

Mistakenly changed the Private IP Address [closed]

I had deployed an Virtual Machine with Windows Server 2012 R2. I went to "Network and Sharing Settings" -> "Change Adapter Settings" -> "Ethernet/Properties" -> "Internet Protocol Version 4/...
1
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2answers
30 views

Why limit execution cores if you're not an cloud provider

We're maintaining development of a system installed at a customer site on their virtual server. This application will at times need to run heavy work. However it's only been granted a single core. I ...
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0answers
24 views

Turning on a virtual machine in esxi remotely without full access to the dedicated server

so a bit of background. I've setup a virtual machine via esxi on an ovh dedi, for a friend to use (via tightvnc/teamviewer). However he's not needing it running most of the time, and to save on cpu ...
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0answers
24 views

ESXi 5.5: Clone a VM to template using CLI (on Linux)

How can I clone a VM to a template from Linux CLI. I tried using VMware vSphere CLI (vCLI) in vain, couldn't find an option to do so.
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0answers
31 views

IIS Websites running out of memory

I have a server that is hosted by the parent company as of recently. This server is running two websites. One is a memory hog, the other is much smaller in scale. We had a situation today where the ...
0
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0answers
25 views

Azure Linux based VM could not start. Internal server error

We have our own Linux based distribution for which we created a .vhd file from .iso using VirtualBox. We uploaded the .vhd to Azure following the instructions given here: https://azure.microsoft.com/...
2
votes
2answers
73 views

ZFS: very big files + compression + snapshots

I backup several virtual disks (total = around 4 Tb), with several weeks of retention time. I use 4 x 4 Tb disks in the computer dedicated to primary backup. The filesystem is ZFS RAIDZ2, so 8 Tb ...
0
votes
1answer
29 views

How do I properly configure KVM

I have a remote dedicated server on which I have installed KVM. When trying to create my first virtual machine I am unable to ssh to the machine. I assumed that I needed another ip address so I ...
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0answers
16 views

Xen - VM not reflecting memory

I am using Xen to hot-add memory to virtual machines, but it seems that I am not getting the correct vales in /proc/meminfo on the guest. As displayed below the guest has 2 GB of allocated memory. ...
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0answers
38 views

ifconfig dont shows any tunnel (ipsec)

Im trying to connect to networks with ipsec. But its not working, after install and configure ipsec when I execute this command service ipsec start, I dont get any error, but with ifconfig none tunnel ...
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6answers
3k views

Planning my first server with Ubuntu KVM Virtual Machines

I am putting together a dual-xeon quad core (i.e., 8 cores total) 12GB RAM linux server to replace several old smaller servers. I would like to use virtualization both to learn about it and because ...
1
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0answers
1k views

FreeBSD Jail own network stack with vimage

I want to throw all services from the host system and put them in jails. Unfortunatly this doesn't work for file sharing (e.g. nfsd) because the jails don't have there own network stack by default. I ...
1
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1answer
3k views

Proxmox: VMs and different public IPs

I have a server which has two NICs and both are directly connected to internet. I have five different public IP addresses available for the VMs. The host machine (Proxmox) doesn't need to use any (it'...