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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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 ...
0
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0answers
6 views

Reduced network throughput between linux guest and windows host

I'm running a CentOS 7 Linux VM in VirtualBox. A client application runs in the guest and a server application runs in the Windows 10 x64 host. I had a performance test whereby the client invokes a ...
1
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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 ...
1
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1answer
25 views

Is it possible to encrypt a virtual machine or container so the host is not able to read any of its data?

I'm wondering whether it would be theoretically possible for a cloud hosting provider to run an application for a customer where the customer doesn't trust the hosting provider with the data in the ...
4
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3answers
8k views

Convert Virtualbox image to Hyper-V

Is it possible to convert a Virtualbox image to Hyper-V? Preferably without having to startup the virtualbox image.
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0answers
15 views

virtualbox networking - difference between 10.0.2.2 and 10.0.2.15

I setting up a vm-based appliance on VirtualBox (using Chef) and, while I have figured out my networking out by trial and error, I'd like to understand better what's going on. Basically, I have 3 ...
1
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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:~$ ...
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votes
1answer
286 views

VMware ESXi 6.0 DirectPath I/O PCIe Device Not Working

I'm attempting to attach a NIC to a specific VM on my basic ESXi 6.0 setup. DirectPath I/O should allow me to do this, and the machine I'm running ESXi on does support VT-d (Dell Optiplex 990 with an ...
1
vote
1answer
6 views

App-V processes in the server task manager

I work for a vendor company that provides services for metering application usage in datacenter environments. We were recently asked whether we support App-V metering. I have a question about App-V ...
7
votes
1answer
285 views

Vmware - Consolidation is needed, but I want to revert

Last night I took a snapshot of a VM before adding a new disk and running an offline defrag of Exchange (using the newly added disk as the temporary path). When I woke up today the server was ...
1
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3answers
5k views

Can the Hyper-V role be installed on Windows Server 2003?

Is it possible to run Hyper-V on Windows Server 2003 as the host OS? The only documentation that I've been able to find is about running Server 2003 as a guest.
0
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0answers
12 views

Network issue with VMs mixing dedicated public IP and port forwarding

I already have a virtual machine with its own public ip address and I would like to set up a new VM using port forwarding from the host. I have two public addresses: X.X.X.146 for the host Y.Y.Y.99 ...
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0answers
18 views

VMware converter is unable to detect disk or volume [on hold]

When connecting to the "source machine" I get the error "unable to detect disks or volumes on the source machine". The file system on the source is "simfs". I am pretty sure that is what is wrong, ...
0
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1answer
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
votes
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
36 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.
0
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0answers
19 views

Centos Cluster Two Nodes only [on hold]

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 ...
0
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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. ...
0
votes
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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votes
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.
1
vote
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?
13
votes
3answers
682 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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votes
0answers
31 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 ...
7
votes
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 ...
0
votes
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 ...
0
votes
0answers
22 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 ...
0
votes
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
votes
1answer
43 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. ...
0
votes
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 ...
1
vote
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 ...
0
votes
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
votes
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
vote
1answer
29 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 ...
0
votes
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 ...
1
vote
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 ...
0
votes
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
525 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
682 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 ...
1
vote
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
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1answer
66 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
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
votes
0answers
18 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!