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 ...

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29 views

How to use virtual interface as default interface

I've got a cloud SSD VPS @ OVH, and I'd like to change the default interface used for requests. I have two interfaces: eth0 (which is the default interface) and eth0:0 (which is the new virtual ...
2
votes
2answers
246 views

LinuxContainers arch-linux double login tty

Since upgrading to LXC 1.0 with the new Arch Linux template when I create a new instance I have a double tty when invoking: lxc-console --name <container> This is the output: Arch Linux 3....
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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 ...
2
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2answers
5k views

Method of deploying a VB6 app to a Windows server 2012 RDS server

My environment currently has a Windows 2003 server running terminal services. That server has the visual studio 6 IDE installed. It also is responsible for running a very old ( and poorly built ) VB6 ...
2
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0answers
23 views

Allowing outbound internet access with NSX while maintaining micro segmentation

I am getting into the world of VMware's NSX product for the purpose of micro segmenting VM's in the datacenter. That is to say, living in the same network space but not being able to talk to one ...
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0answers
86 views

Where are network namespaces in lxc / lxd?

I am trying to understand namespaces in the context of lxd / lxc. I have two containers which respective eth0 is bridged to br1 and br2 on the host. This is done via a Virtual Ethernet interfaces ...
0
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0answers
6 views

Azure Cost Estimator Tool hung clicking “View Report” after running for 6 days - can I still extract the report?

I'm running the Microsoft Azure Cost Estimator Tool for a length of 6 days with 2HR intervals. This ran successfully and there were no signs of system instability, nothing else has crashed. Hoenter ...
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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 ...
0
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1answer
54 views

Error while Expanding Disk Space of virtual machine in Hyper-V server

I have one Virtual machine running on my hyper-v server which has allotted the disk space of 100GB, i have only created C drive in this machine and C drive of this machine is fully consumed due to ...
1
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0answers
27 views

iperf actual send rate always lower than the expected target bandwidth until some equilibrium reached. Why?

I did an UDP iperf 2.0.5-Ubuntu test between two VMs on the same hypervisor. As can be seen in the iperf output below I started my first test with "-b 686M" flag. However, iperf reported that it was ...
3
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2answers
209 views

Should I split up an application in multiple, linked, Docker containers or combine them into one?

Background I'm currently working on building an application which I want to deploy to Docker containers. The containers will run on a server of mine. I want to have the ability to run other ...
4
votes
5answers
9k views

How to automatically start VM created by virt-manager?

I have created a virtual machine with virt-manager that runs on kvm/qemu. The machine works well when started through virt-manager. However, I would like to be able to start and stop the VM through ...
3
votes
3answers
2k views

Service can't connect to self using public IP, NAT problem

I have a dedicated server from serverloft.eu, but due to some network security I cannot use bridge networking on my server. So I have setup all my IPs to the main eth0, and used NAT to forward trafic ...
0
votes
2answers
1k views

How to change disk controller of a VM running on XenServer 6.2?

I'm running a installation of XenServer 6.2 where I've imported a .ova. The .ova is an image of a linux-system from a previous vmware esxi environment. The problem is that since the linux-image doesn'...
1
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1answer
84 views

Libvirt with Xen fails to start correctly Ubuntu 14.04

At the moment i'M really feeling a little helpless: I tried to setup Ubuntu 14.04 with Xen and libvirt for management. I created a VM but I did not auto-start (altough autostart is checked). If I do ...
1
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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'/> <...
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0answers
23 views

Without tcpdump running, Linux bridge works selectively

Architecture: Ubuntu 14.04 as a libvirt/KVM host with one VM. There is bridge bri17 on the host, with two interfaces: eth2.17 (uplink to the Internet) and vnet0 (to the VM). Symptoms: all tests ...
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3answers
135 views

How can I determine the performance penalty of VT-d vs. baremetal?

I am looking to configure my server in a slight odd way to create a private cloud setup. I have to take the HBA that my storage disks are tied to and pass it into a VM (probably xen) to allow the ...
0
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1answer
17 views

Virtual Sound Card Not Working on Windows Server 2008 R2 SP1 x64 virtual machine

I have Virtual Audio Cable successfully installed on my Windows Server 2008 R2 SP1 x64 virtual machine. It seem like driver works (new audio device in Device Manager group and VAC control panel works ...
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1answer
56 views

Windows 7 - VM resource usage [closed]

I would like to ask a question about Virtualization and the performance impacts As the title suggests I wish to VM Windows 7 for a work laptop and run linux on the backend to leverage some of its ...
0
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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 ...
0
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0answers
106 views

What's the FreeBSD equivalent for the Linux pointopoint

What's the BSD (FreeBSD) equivalent of pointopoint used in /etc/network/interfaces on Linux (Debian)? I'm following this (Network configuration host system KVM/Routed) guide for how to use Hetzner's ...
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0answers
680 views

VSFTP and openLDAP based virtual users home directory

I have a VSFTPD server based on CentOS 6, configured to authenticate virtual users against an openLDAP server. I can login to the FTP server, however, authenticated users are not redirected to their ...
5
votes
0answers
39 views

How would I know if I should I be disabling virtual NUMA on VMs running older applications?

From VMware's docs: Virtual NUMA topology is available to hardware version 8 virtual machines and is enabled by default when the number of virtual CPUs is greater than eight. You can also ...
3
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5answers
7k views

Can I virtualize multiple hosts into one virtual system?

I have 5 computer systems in our small office. From my basic understanding of Virtualization technology, I think I can virtualize the 5 systems into one big virtual system. I wish to confirm this. So,...
3
votes
4answers
2k views

Monitoring and statistics through libvirt

Is it possible to monitor and gather statistics in realtime (CPU, memory, HDD, network, ... - something like dstat) of guest systems with libvirt through console from host system (KVM based)? If yes, ...
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votes
2answers
72 views

ESXi host memory usage seems high with no VMs running

I have set up an ESXi 6.0 Update 1 installation on a HP ProLiant Microserver Gen8. This is using the HP-provided image for ProLiant servers. With no VMs running the host memory usage is 1714 MB, ...
2
votes
2answers
71 views

Ping only works twice

I have created a vm inside a xen host. By following this guide, I have managed to ping www.google.com, but it only ping-pongs twice before getting Destination Host Unreachable. If I restart the vm, I ...
4
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4answers
13k views

Change amount of Ram and CPU cores in KVM

How can I Change amount of Ram and CPU cores for a virtual machine in KVM that is already created? Thanks
0
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1answer
37 views

Virtual disk expansion

I'm running a virtual image (which happens to be our server for a number of programs) on a machine running ESXi 5.5.0. Although the host computer has a SSD of about 200GB, the virtual image was ...
3
votes
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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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'...
4
votes
2answers
31k views

How to export a VMware ESXi 5 VM into a file to restore it later?

As I've bought a server it had a RAID controlleer which was not supported by VMWare ESXi 5, so I had to install it in a bare non-RAID configuration. Now as I've bought a supported RAID controller I am ...
1
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2answers
36 views

How do I redirect with Apache reverse proxy on server errors

I have several http and game servers on a network and currently use an Apache2 reverse proxy to divvy out traffic between domains and machines. I am getting a significant amount more traffic to one ...
8
votes
5answers
805 views

Setup for high availability virtualized environment

For a project I have the task of planning a high availability setup for a web shop and CMS system. However, of course the project is on a tight budget. So a high end solution might not be in the ...
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votes
2answers
58 views

Is it possible to use a ftps server (NAS) to use as a virtual hard drive in VMware vSphere Hypervisor, if so, how? [closed]

The title explains most of it. Basically, let's say I have a NAS(I don't). I want to allow another computer to use it as storage for a virtual machine on VMware vSphere Hypervisor. The software on the ...
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votes
1answer
300 views

Nested virtualization - is it possible? [closed]

I need to use Win10 with a server created with VMware ESXi 5.0. I'm going to install Debian 6.0 on VMware ESXi 5.0 and then install VirtualBox 5.0.14 with Win10 guest operating system. Will it work?
1
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2answers
102 views

Using hpasmcli, how do I find two specific BIOS settings?

Using hpasmcli in Ubuntu on an HP ProLiant Generation 9 server, how do I find this BIOS setting? Boot to BIOS -> System Options -> Virtualization Options is either enabled or disabled I cannot ...
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votes
2answers
59 views

Connecting two ESXi servers via LAN

i have an issue with configuring two ESXi servers to communicate with each other. My configuration looks like this: 2 ESXi servers with 4-4 Ethernet ports. ETH01 on each server is used for internet (...
0
votes
1answer
201 views

Benefits of virtualization if only one server on hardware

A big HANA server will sit alone on dedicated hardware, nearly hundred processors, 2 TB of ram. The customer insists on having VMware between the iron and the DB. Most of the advantages of ...
0
votes
1answer
24 views

enabling virtual hosts in apache 2.4 or later

I'm using apache http server 2.4 on debian 8. I seem to recall from a few years ago that if you wanted to have virtual hosts, you have to enable this by adding a line to your main apache config file. ...
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votes
1answer
51 views

Please explain the statement, “Containers are lightweight…you can run thousands on a server…” [closed]

In much of the hype around containers I often hear statements such as: Linux containers are very lightweight...you can potentially run thousands of them on a single server... I understand that ...
52
votes
7answers
103k views

Top - what does Virtual memory size mean? …linux/ubuntu

I am running top to monitor my server performance and 2 of my java processes show virtual memory of up to 800MB-1GB. Is that a bad thing? What does virtual memory mean? And oh btw, I have swap of ...
1
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2answers
103 views

Sending SMS from legacy system without the option for physical sms/gsm modems

My problem is that there is a legacy system for building automation (ventilation, temperature, lighting etc) without the possibility for upgrades, that needs to send text messages through a connected ...
6
votes
3answers
7k views

Bridging VirtualBox over OpenVPN TAP adapter on Windows

I'm trying to configure a virtual machine (VirtualBox guest running Backtrack 4) with a bridged adapter over a VPN connection. The VPN is is hosted by the cybersecurity club at my university, and ...
1
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0answers
84 views

Libvirt & USB Hub Passthrough

I have a virtual machine which I wish to have a USB Hub and all of its devices allocated to a virtual machine. The Hub in question is a USB hub which itself is plugged into one of the ports on the ...
1
vote
1answer
3k views

Can not display Proxmox console due to Connection time out

When I try to open console in proxmox ve nothing happens and I see this error in logs: no connection : Connection timed out TASK ERROR: command '/bin/nc -l -p 5900 -w 10 -c '/usr/sbin/qm vncproxy 100 ...
15
votes
7answers
6k views

Is virtualbox good for live server virtualization

I used virtual box before to test OS installation on my own personal computer. I'm not sure if it's suitable for actual virtualization on live servers. I mostly hear about Xen for that. Is virtualbox ...
3
votes
1answer
118 views

Can I run two domain controllers within VMware vCenter on one physical server?

Before I go to the main question, I'll explain the current situation: My current employer uses VMware vCenter to run a fully operational, virtual environment (mostly domain controllers and RDP ...
0
votes
0answers
28 views

Xen+Libvirt: How to use PVH mode with Libvirt?

PVH mode is an hybrid of PVHVM and PV modes, where you use both virtualization and paravirtualization techniques for improved guest performance. It's been introduced around Xen 4.4. I'm using Xen 4.6 ...