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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7k views

Vm error during start up “hvm is required for this operation”

I have installed a new XEN server 6.0. I have created a new vm machine and select windows xp sp3 template. When i try to start this new vm an error appears with the following message "hvm is required ...
2
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2answers
1k views

Xen Remus setup

Currently, I'm running the IT for a small organization, and we just purchased a new server to replace our aging Dell poweredge. As the Dell isn't so bad as to be junk, I was hoping to set up Xen on ...
0
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0answers
9 views

LXD 2.0 on Debian 8.4

I'm running Debian 8.4 and would like to set-up recently released LXD 2.0. Is this feasible, or should I stick with LXC? It seems all focus is on using LXD with Ubuntu.
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0answers
14 views

Centos Cluster Two Nodes only

I am trying to create a two node cluster with Centos for the purpose of availability and redundancy. Currently I have two servers with ricci, lucy, conga and kvm installed. I am reading as many ...
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0answers
6 views

What happens with the local virtual machine when I shutdown my PC [migrated]

I have an Hyper-V virtual machine running on my PC and I'm in the middle of an installation wizard. but I have to shutdown my PC where the Hyper-V is running. My question is, what happens with the ...
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0answers
7 views

virt-manager: Partioning the available memory

I have a hypervisor which uses kvm and virt-manager to handle the virtual machines. The hypervisor has 6GByte of memory. If I add a new virtual machine I don't know how much memory is still free. ...
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1answer
12 views

KVM Guest not powering back on

I have recently setup a homelab with a KVM hypervisor: qemu-kvm-1.5.3-105.el7_2.3.x86_64 libvirt-1.2.17-13.el7_2.4.x86_64 I have almost everything working the way I want it (networking/vnc), but ...
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1answer
38 views

Can I understand if two Windows VM are running on the same phisical machine?

As per title, I would like to know if is possible that given two Windows VM to establish if they are running on the same phisical machine or not.
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1answer
2k views

Debian Jessie Qemu KVM GPU Passthrough to Windows Virtual Machine guest Virt-Manager error Bus PCI not found

I'm having problems with Virt-Manager not wanting to boot a VM and giving error: Error starting domain: internal error: process exited while connecting to monitor: char device redirected to ...
23
votes
2answers
9k views

What is the difference between PV and HVM virtualization types in ec2?

AWS EC2 offers two types of virtualization of Ubuntu Linux EC2 machines - PV and HVM. PV: HVM: What is the difference between these types?
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3answers
671 views

Allocating Non-Standard Memory Quantities to Virtual Machines [duplicate]

When setting up virtual machines on the various host systems I've used, be they Hyper-V, VMware or KVM, I have always allocated RAM in amounts that match physical memory configurations - e.g. to add ...
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0answers
19 views

Comparaison between OpenVZ, Xen and KVM on top of Virtualbox

I have to make a comparaison between OpenVZ, Xen and KVM. However I only have a laptop for that and I don't want to install all of them in different partitions. My question is, does it make sense to ...
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3answers
4k views

Why LXC when there is linux-vserver?

I am no LXC expert, but as far as I know it is really similar to linux-vserver. If that is correct, I wonder why there is another player in the already crowded virtualization camp? What does LXC ...
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2answers
23 views

Docker: how to partion my harddrive

I want to create partitions for my docker server. It will only host stateful application, data are stored in /srv/company/appname. I have two hard drive : 20GB 2TB. What is the best way to ...
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0answers
18 views

Hyper-V Windows Server 2012 R2 “Cannot create virtual switch” General Access Denied Error 0x8007005

After an ip change on the network adapter connected to a previous hyper-v switch we ran into some issues so I uninstalled the existing virtual switch and attempted to add a new external. I get the ...
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1answer
1k views

VMware Restart — Blank Screen

I am running VMWare Server on a Windows 2K8 server. I was wondering what the default behavior is for a restart or shutdown initiated from within the virtual host? Currently, when I restart the virtual ...
0
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1answer
41 views

Passing SAN Storage to Virtual Machine in active/passive HA Cluster

I need to attach a fibre channel SAN disk to one virtual machine that resides on an active/passive cluster (pacemaker, corosync). As it is the backup storage, corruption has to be strongly avoided. ...
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1answer
2k views

Error while creating VM using virt-manager on Xen

After a great struggle I got my XEN installed now I am using virt-manager and trying to create a VM. Since my H/W doesnt support full Virtualization using the Para Virtualization installation over ...
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1answer
24 views

lxc 1.1.2 on Debian Squeeze

I am running lxc 0.8.0 inside Debian Squeeze (Linux kernel 3.4.34). Does anyone run lxc 1.1 or newer inside Linux kernel 3.4? As I know, docker require Linux kernel version at least 3.16. What is the ...
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2answers
1k views

Guest networking not working on Debian Jessie Host server KVM with br0 bridged network

GUESTS networking not working at all. In other words guest can not ping host or lan gateway. I have br0 bridge already created, also brctl show that vnet0 was properly added by KVM to br0 on guest ...
4
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3answers
2k views

VSFTPD does not allow upload with virtual users

I am attempting to setup VSFTPD with virtual users on a server running Ubuntu 12.04. I have configured the server to allow for virtual users to login, but I am having trouble getting it to allow ...
4
votes
1answer
2k views

How to get virtualized SR-IOV Infiniband interface UP?

I've spent several days on this now and I've managed to get SR-IOV working with the Mellanox Infiniband card using the latest firmware. The Virtual Functions appear in Dom0 as 06:00.1 Network ...
1
vote
1answer
4k views

Can I use XenServer GPU Pass-Through without XenDesktop?

XenServer documentation only covers using GPU Pass-Through ("vGPU") to run XenDesktop's "HDX 3D Pro Graphics." XenServer GPU Pass-Through cannot be used with the XenCenter VNC console and it does not ...
1
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1answer
27 views

Performance impact enabling intel vt-x

I have a rather unusual question: What is the performance impact when you enable vt-x and you don't need it? I ask this because all of the new servers I receive have this enabled by default in the ...
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1answer
20 views

DATA NOT STORED IN GUEST OS?

Dell PowerEdge T110 II Tower Server | Windows Server 2012 R2 | Hyper-v VM manager | Windows 7 Pro (Guest OS) The Hyper-V guest OS (win7 pro) serves as the database server (MySQL) for storing ...
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1answer
4k views

How do I tunnel an HTTPS proxy through a virtual machine (VMWare)

I have a personal setup at home using VMWare Workstation. I also have a set of Virtual Private Machines that run Squid, and therefore provide me HTTPS proxy tunnels. Using Proxifier, I can tunnel all ...
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0answers
12 views

Errors after unmounting qcow2 image with LVM

I successfully mounted a qcow2 image on my machine (the guest image uses LVM) using: qemu-nbd -c /dev/nbd0 /path/to/qcow2/file mount -o rw /dev/nbd0p1 /mnt/<mountpoint> vgchange -ay VolGroup ...
4
votes
1answer
502 views

Count number of allowed CPUs in a Docker container

My specific scenario is the following. I launch a docker container with a specific cpuset: docker run --cpuset-cpus="0-2" # ... inside that container I run a shell script as the entry point and ...
0
votes
1answer
671 views

SSH using Agent Forwarding with Windows Host OS, Vagrant Ubuntu Guest OS, and Keepass/Keeagent

Intent: To be able to deploy to lan-example.com from any dev environment; whether it be directly from the virtual OS, or any single-OS system, or even over the internet using ONE SSH key stored in ...
18
votes
11answers
10k views

Are there any good reasons for disabling hardware-assisted virtualization?

We've had a number of servers from Dell recently, all of which have had hardware-assisted virtualization disabled in the BIOS. As far as I know hardware-assisted virtualization is a good thing - so ...
3
votes
1answer
3k views

tap interfaces always disabled in linux bridge

I have a physical interface eth0, and I want to create two virtual interfaces and bridge them with eth0. For this purpose I do: #Create the virtual interfaces tunctl -t tap0 tunctl -t tap1 ifconfig ...
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1answer
1k views

Private networks with SCVMM 2012 SP1 and Hyper-V

In my lab I have two hyper-v host running Windows 2012 server. For lab and test purposes I want to have private networks that are available on both hosts, and where the VMs on those networks are able ...
2
votes
1answer
2k views

Nginx Virtual host 403 Forbidden

I have just brought a domain name (example.com) and have setup a URL frame redirection to my server's IP XXX.XXX.XXX.XXX, however I am getting a 403 forbidden error. I can access pages fine via the ...
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votes
1answer
23 views

Shared nothing database systems with SAN

Cloud data warehousing being so popular recently, I am wondering if there is an inherent contradiction in the manner in which they are architected: Terradata, Greenplum etc. require 'Shared Nothing' ...
0
votes
1answer
61 views

pfsense as a virtual host

There seems to be a fair bit of information about running pfsense as a virtual machine on another hypervisor of some sort, but I am wondering if I can do the reverse and use a pfsense install as the ...
2
votes
3answers
3k views

Cannot connect to Openstack Instance via horizon, but SSH works?

I've got an OpenStack deployment running inside a VM for testing purposes. My setup is as follows: Host Ubuntu x64 with Virtualbox -> Guest Ubuntu x64 with OpenStack -> Ubuntu X64 Server Test ...
1
vote
2answers
1k views

VMWare and Turnkey Linux appliance can't access network

I have a VMWare ESXi cluster running many Windows and Linux VMs perfectly. I have installed the Turnkey Linux Redmine appliance, and am having a lot of trouble getting the networking to work ...
2
votes
2answers
2k views

Wake-on-lan to trigger virtual-machine with kvm and libvirt

I'm doing virtualization with KVM and managing it via the Libvirt daemon. How do I configure Libvirt or KVM to listen for Wake-On-Lan packets sent the the Virtual Machine's NIC's MAC address and to ...
0
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0answers
17 views

What are the Resilient Overlay Network (RON) downsides?

What are the RON downsides? How this type of network handle with security questions? There are vulnerabilities? The RON's performance is good? Thanks in advance!
1
vote
0answers
25 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
234 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 ...
0
votes
1answer
16 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 ...
1
vote
1answer
2k views

How to configure VXLAN over linux bridge?

I am using Ubuntu 14.04 which support VXLAN configuration. Currently I can add a VXLAN interface such that: vagrant@ubuntu:~$ sudo ip link add vxlan1 type vxlan id 1 group 239.1.1.2 vagrant@ubuntu:~$ ...
2
votes
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 ...
1
vote
1answer
1k views

Resizing a partition on a virtual hardisk (file with msdos partition-table)

I have a local file on my disk which contains a msdos partition table and some linux-partitions. I use this as a virtual raw disk with qemu. klm@lato:~/images/disk$ parted arch-linux2 p WARNING: You ...
2
votes
0answers
15 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 ...
0
votes
0answers
49 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
5 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 ...
0
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0answers
20 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
votes
1answer
40 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 ...