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 ...

learn more… | top users | synonyms (2)

0
votes
1answer
21 views

virsh command that displays the cpu and memory consumption?

I want to know if there is a command virsh to display the cpu and memory consumption of each machine virtual. I created the virtual machine using KVM in ubuntu system.
1
vote
0answers
31 views

What's the impact of a high cpu steal time on XenServer's dom0?

From what I understand, cpu steal time is the CPU time that the VM kernel requested, but was denied by the hypervisor because it was serving another VM. From my experience, on a XenServer that has ...
0
votes
0answers
57 views

Assign 2 IP addresses to one virtual machine

I would like to assign 2 IP addresses to one virtual machine but cannot make it working. I have IP MAC 151.180.39.138 02:aa:cc:73:b1:39 78.132.120.30 02:cc:aa:79:fb:e7 /etc/...
-1
votes
0answers
22 views

KVM CPU features security risk or performance benefit

I need to run an untrusted VM with libvirt and KVM and need decent performance. When I run virsh capabilities to see what my CPU can provide, I get: <cpu> <arch>x86_64</arch&...
0
votes
0answers
16 views

Having different two different public IPs or Xen guests

I'm using XenServer and CentOS. I have successfully configured two Windows Server guests and they both work properly. On the host machine, I have xenbr0, xenbr0:0 and xenbr0:1 (for two different IP ...
-1
votes
0answers
3 views

Virtualbox VM bridged NIC to host Loopback-NIC serve Internet [migrated]

I have a Virtualbox VM with a NIC in bridge mode to the host machine Loopback Interface... I have in the VM the IP 192.168.0.12/24 I Have in the host machine 192.168.0.11/24 (assigned to Loopback ...
0
votes
0answers
69 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
0answers
15 views

QEMU image format

I have an image with .qemu format. I looked here to see QEMU supported formats but there is no .qemu. Is.qemu equal to raw? Thanks
0
votes
0answers
13 views

slow shared folder file append operations (VBox/VMware/CIFS)

The next problem occurs in both Vbox and VMplayer. I am having windows 10 as HOST, and debian 8 as guest. I am developing in both PHP and nodeJs, my plan is to use HOST windows 10 as development ...
1
vote
2answers
47 views

How to balance elasticsearch (java) on a very powerful machine?

On a 16 core XEON class, 128GB RAM RHEL server I want to deploy elasticsearch. What is preferable performance-wise? Have a huge elasticsearch process to use all resources on the native host? Break ...
1
vote
3answers
89 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. ...
4
votes
2answers
2k views

Linux-KVM: file server as guest or host?

I'm planning on building an Ubuntu server that primarily needs to be a file server, but due to budgetary constraints will likely get used for running virtual images for a couple of different ...
26
votes
1answer
20k views

Vagrant set default share permissions

When running a vagrant instance the project folder is mounted on /vagrant automatically. However is mounted with the following permissions # ll -d /vagrant drwx------ 1 vagrant vagrant 612 Jun 13 14:...
-2
votes
1answer
89 views

Provision a virtual server within CentOS 7? [closed]

This may be a really silly question, but I currently have a dedicated server and I have an incredible amount of redundant hardware. I'd like to be able to provision virtual servers running various ...
0
votes
0answers
24 views

Hypervisor vs Virtual Machine Monitor

What is the difference between a Hypervisor and a Virtual Machine Monitor? Mostly it is referred as the same but today I started to read a book in which they are different things. After about two ...
0
votes
0answers
27 views

Virsh cannot connect to Xen server

I have installed the latest version of Xen server 6.5. Now I want to connect to it with virsh (libvirt-bin). When I do this I get the error error:end of file while reading data: sh:nc:command not ...
54
votes
9answers
133k views

Creating a virtual machine in VirtualBox from a physical one

Is there any way to create a virtual machine that you can use in VirtualBox from a physical installation that you have? For instance, if I have Windows XP installed on a physical computer and want to ...
0
votes
0answers
28 views

Is there a way to clone/template linux VMs on Hyper-V

I've seen how you can do it with System Center but we don't have a System Center license and there is no plans to get one. I guess I could install a trial for the 60 days just for this purpose but I ...
0
votes
0answers
14 views

Virtual Machine to Virtual Machine Speed on Same Host and Network

I have two virtual machines on the same esxi host, the same network and same virtual switch. I am testing bandwidth between the two servers but I can't seem to pull more than 900Mbits. I am using ...
0
votes
0answers
22 views

What is the network connection speed between two containers communicating via a virtual bridge running on the same host?

Does a virtual bridge (added to /etc/network/interfaces) limit the transfer speed of data from the memory of one lxc/docker container to another? For example does the memory throughput drop to that ...
4
votes
3answers
67 views

VMWARE Guest Storage VMDK vs RDM-V vs RMD-P

When is it best to use VMDK, RDM-V or RDM-P? I have always defaulted to using the standard VMFS5 Datastores with VMDK files for each server. However I typically use RDM-V when I need an excessive ...
1
vote
0answers
47 views

Can't use unallocated space on a Win 2k8 R2 VM

I'm hoping someone can help me with this because after 2 days of googling I've come up with nothing. I have a file server that I have converted from a physical to a virtual on an ESXi 6 host. I have ...
2
votes
1answer
24 views

libvirt kvm qemu virtual machine - hard code domain-id?

Is there a way to hard code the domain-id of a virtual machine kvm guest? I tried adding an id attribute to the XML configuration via virsh edit name And I also tried to edit the XML directly ...
1
vote
0answers
122 views

Export OVF fails with “File not found” error

Good morning/afternoon/evening all: I am having an issue with a single Virtual machine when it comes to exporting an OVA/OVF. I recieve a "File not found" error that appears to be pointing in the ...
0
votes
0answers
47 views

Qemu kvm necessary kernel and qemu version on jessie host and guests with Skylake

I am running a dedicated server with Debian jessie and the current backported linux-image-amd64/linux-headers-amd64 (currently 4.5), because the server has a Skylake CPU. On the dedicated root, I'm ...
7
votes
6answers
3k views

Is it possible to cause artificial network packet loss or latency?

I'm trying to reproduce some issues on a deployed application where the MSSQL server and client are running in two separate machines. I think there may be network issues between the two machines, so I'...
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 ...
0
votes
0answers
52 views

MAAS fails to commision on 16.04

After upgrading the images on mass I am not able to commision any system. the logs go to Setting up libipmiconsole2 (1.4.11-1ubuntu1) ... Setting up libipmidetect0 (1.4.11-1ubuntu1) ... Setting up ...
0
votes
1answer
65 views

Virtual NICs and Host only adapter in KVM

How can i create virtual network adapter like a physical eth0 in KVM? As I lack physical NICs. Also I need a Host-only adapter just like in VMware to connect two VMs in KVM. What is possible solution ...
0
votes
2answers
61 views

Is there any way to fake SAN in VMs

I need to set up an SQL Server cluster for very low transaction volume functional testing. That requires a Windows Failover cluster and according to TechNet and Michael Otey that requires a SAN. ...
2
votes
2answers
43 views

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

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
votes
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.
0
votes
0answers
37 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
votes
1answer
314 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
13 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
301 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 offline,...
1
vote
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
votes
0answers
15 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 ...
0
votes
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 ...
0
votes
1answer
17 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 ...
-3
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.
25
votes
2answers
10k 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
722 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 ...
8
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
28 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
1answer
56 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. ...
1
vote
1answer
25 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 ...
1
vote
1answer
44 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
28 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 ...
0
votes
0answers
15 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 ...