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 (1)

0
votes
1answer
20 views

Virtual guest: NTP sync with host

Is there any way to get a virtual guest to only query it's current host for NTP? I'm not talking about configuring ntp.conf with the host's IP here either as VLAN's & firewalls may block that ...
-1
votes
1answer
17 views

Bochs and Bios Canonica VirtIO SCSI Disk Device running Windows 2008 R2

I have a Windows 2008 R2 server I can only remote this server so I need to know what type of virtual environment is hosted on, The Bio Manufacturer shows Bochs and hard disk shows: Canonica VirtIO ...
0
votes
0answers
9 views

Setting the noatime flag for filesystems inside an lxc container

My host filesystem is ext4 mounted with the noatime flag. But inside an lxc-container, the flag is absent. Here's the output of mount on the host: /dev/sdb1 on /home type ext4 (rw,noatime) And ...
0
votes
0answers
3 views

network adapter not listed in my virtualbox vm [migrated]

I am trying to SSH into a virtual machine I have set up in virtual box from my Windows 7 host machine. I would like to make several development machines and ssh into them from my host machine, as well ...
-2
votes
0answers
24 views

Pfsense on intranet ip address

I wish to secure the traffic between ESXi server vms and other physical nodes on my network. What I have: A public IP address on the WAN port of the Wifi router A dedicated server with 2 NIC ...
-1
votes
1answer
24 views

Can you use CGroups inside an OpenVZ Container?

just a quick question, which i have had trouble finding the answer to: The OpenVZ Authors have been contributing a large amount of code to the linux kernel, in order to get virtualization features ...
1
vote
2answers
36 views

Migrating Hyper-V VM's to CentOS 6

I have tried to search this around in google, but I haven't actually found anyone migrating from Hyper-V (Windows) to CentOS 6, only the other way around. So, I was wondering if there are any pointers ...
1
vote
0answers
18 views

lxc command always “get error 4 in libc-2.12.so”

I've tried several time to find out why suddenly my LXC not working, I use dmesg | tail it shows: lxc-start[2777]: segfault at fffffffffffffffc ip 000000390347b82c sp 00007fffd9046c18 error 4 in ...
0
votes
1answer
19 views

How to add an existing encrypted vHDD to a new virtual machine?

I am using VMware workstation with encrypted virtual hdd-s. I tried to use one of the vmdk files as an hdd on another virtual machine, but when I try to add them as an existing disk, I get the ...
1
vote
2answers
42 views

Can PXE boot of Hyper-V VMs be disabled?

Hyper-V virtual machines have the ability to PXE boot. Obviously, PXE boot raises some security concerns. The problem is, unlike a typical physical machine's firmware, there isn't an obvious way to ...
0
votes
2answers
45 views

How to block a VM from accessing other machines on network - XenServer

This might be a little far fetched and might not be possible. I have a virtual machine that will have files on that I don't want people to be able to transfer off - they are allowed access, I just ...
1
vote
1answer
27 views

vSwap vs Burstable RAM for OpenVZ

What is the big difference between vSwap and Burstable RAM? Does vSwap create and cause I/O by using disk? I know SWAP will use the disk so is vSwap the same as swap just virtualized in the ...
1
vote
2answers
52 views

Xen PV, Xen HVM and KVM

Am I correct that you can boot up any operating system with either of these virtualization types as they act as a bare metal machine and compile your own kernel? I am looking to switch over from ...
1
vote
0answers
39 views

How do I get IPv6 packets to my KVM virtual machine?

My setup is: Debian Wheezy x64 on the host and on the guest. I am using a tun/tap setup to connect a virtual machine to the host. The KVM network options I use are: -net ...
-1
votes
0answers
24 views

P2V Conversion keep failing

I'm try to convert our Windows 2003 STD server into VM but it keeps failing. I'm doing Online Conversion and get the following error: Error (2916) VMM is unable to complete the request. The ...
0
votes
0answers
31 views

Different virtualization technologies without VT-d (IMMOU)

I need access from a vm for a special ISDN pci adapter. Did anybody made PCI cards work with KVM/Virtualbox with hardware which does NOT support vt-d? As of my research shows: 1, KVM In order to ...
0
votes
0answers
31 views

CentOS Host KVM Virtual Machine running a Windows VM - No internet access

I've installed a KVM virtual machine on a CentOS host using libvirt. I've also set up a bridged connection from the interface en0:4 running on IP x.x.x.15 to br0. (The IP is a public one). Running ...
2
votes
0answers
30 views

LXC containers act differently on difrent servers [closed]

I have two physical servers A and B. I wanted to upgrade them from Ubuntu 12.04 to 14.04. Here is my current setup (if I'm left out any info here, let me know and I'll add it): Server A: Ubuntu ...
0
votes
0answers
20 views

Openstack: Starting multiple shutoff intances

I am using Openstack Icehouse running on Ubuntu. After rebooting Compute node all instances that were running there will be in shutoff state. Is there way to restart them all at once? Only thing I ...
0
votes
1answer
56 views

Windows 2012 R2 Hyper-V vs Datacenter edition

We need to deploy a Windows 2012 R2 Hyper-V cluster with 4 physical server. We going to use Datacenter edition licencing, but consider installing the Hyper-V edition on the serveres. Just to install ...
0
votes
0answers
28 views

Error while booting VMDK in VMWare Player; UNMOUNTABLE_BOOT_VOLUME

Hi all and thanks in advance for taking the time to read this. My employer has provided me with three VMDK files, each representing a different hard drive of a VM. My aim is to get these converted to ...
0
votes
1answer
34 views

Image Sharing File Server on Windows Storage Spaces.

I am working on Windows Storage Spaces File server, but I ran into this strange situation when transfer to client systems is aroung 300kb/s. There are two SS servers on the network - the other one is ...
0
votes
1answer
47 views

What is the safest way to convert a Windows Server 2012 Hyper-v system to Linux with KVM?

I have one server running several different virtual machines with Hyper-v for different clients. All of my clients have given the OK to a maintenance window over one day on a weekend in the future. I ...
0
votes
2answers
21 views

unable to connect from other hosts to vm client

I'm building a vm client from a host using the virtual network 'default': NAT setting in virt-manager kvm which makes a bridge (virbr0) using my host's nic. The vm client receives the default ip of ...
0
votes
1answer
84 views

How many VMs per core/vcpu can be run in OpenStack

I'm working on a simulation tool to model VM behavior and migrations on Cloud environments. I deployed a little OpenStack cluster with 4 nodes on cheap regular hardware PCs at the university using ...
2
votes
1answer
124 views

Can a Docker container uses the full CPU power and memory of the host OS?

I am new to Docker, but I have experience of using VM and hypervisor. Referring to Docker introduction and this image, Docker containers are isolated but share the same host OS. If we deploy only 1 ...
1
vote
2answers
69 views

Server 2012R2 Thick Provisioned Disk VSphere

I have a Server 2012R2 VM running on a VSphere ESXi 5.0.0 (1489271) Host. It has been updated and patched to allow support for 2012R2. Within my VM I have several disks (Thick Provisioned). However, ...
0
votes
1answer
60 views

Which hypervisor to play nice with docker.io

I have been running several different virtualisation servers, (ESXi, XenServer, Proxmox/KVM) in the past. I am now in a position where I need to set up a new virtualisation environment that is ...
1
vote
1answer
43 views

Ubuntu LXC 14.04 Error

I had installed LXC in ubuntu 14.04. I had used an existing template and created a VM by executing the below command. /usr/share/lxc-templates/lxc-ubuntu -p /lxc/vm0 After the installation getting ...
2
votes
1answer
70 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
25 views

xen project - bridged interface shows 2 MACs

I have a simple xen project 4.1 setup running on debian wheezy dom0. I have noticed during a network scan that a domU gateway returned 2 mac addresses for the same IP. One MAC being the expected, ...
1
vote
1answer
31 views

ICMP Request not reaching the guest machine on virtualbox

I have a virtual box (4.3.14) installed on host ubuntu 12.04. I have a guest machine ubuntu 12.04 32 bit installed on this virtual box. The problem is that, my ping request is not reaching the guest ...
1
vote
0answers
12 views

Windows DHCP MAC-Range to Scope allocation

I wonder if there is any options to map a specific Range of MAC addresses to a specific DHCP address scope. The thing is, I want a specific scope for address allocation to bridged Virtual Machines ...
0
votes
1answer
56 views

how to configure linux vm as router which communicate between two subnets

I have 3 virtual machines installed on vmplayer. Out of which I have made two of them as host of two different network. Host1 ip=192.168.1.13 gateway=192.168.1.11 and Host2 ip=192.168.2.14 and ...
0
votes
1answer
57 views

Disable VMware BIOS Legacy Diskette

In the main tab of VMware BIOS setup utility there is an option to disable "Legacy Diskette A" (and B). Which is the option to get this by means of the vmx configuration files? I tried: ...
3
votes
2answers
79 views

same subnet,different VLAN in Virtual machine

I have 2 VLAN,VLAN 100 and 101 but only one subnet i am trying to make this work with virtual machine so that VM will have two IP address in same subnet but will actually be in two VLAN. steps ...
1
vote
4answers
77 views

EC2 instance snapshot

In my early days as KVM admin, when I had to do a backup of a VM image, I followed the next steps: Pause the VM Snapshot LVM volume Resume the VM Copy image Remove LVM snapshot Now I've got some ...
-3
votes
1answer
24 views

Vmware Server2 Last known working kernel version [closed]

I hope there is some vmware expert here who can help me out. I would like to know what is the lastest Linux Kernel version which known to work with Vmware Server 2.0.2. What I using right now is ...
0
votes
1answer
77 views

zeroshell with multiwan on virtualbox

I'm planning to setup Zeroshell as a router gateway for a school network on Virtualbox. The host machine will run Ubuntu server edition. Then I will install Zeroshell as a guest Os with 4 configured ...
0
votes
1answer
32 views

VirtualMachine is not available from bridged interface outside the local network

I'm unable to connect to any service running in my VirtualMachine from Outside my local network. My VM has the following configuration: eth0 - Host Only Network eth1 - Bridged Network (Therefore ...
0
votes
1answer
12k views

CentOS 7 Minimal Install doesn't comes with networks scripts? Which version to use then? [closed]

I'm installing CentOS 7 as virtual machine but I'm having some problems related to network. As image shows I select Minimal Install for later add trough YUM any packages I want as for example: PHP, ...
1
vote
1answer
80 views

Convert manual network commands into networking scripts

On a dedicated server with an hypervisor as host and Fedora 20 as guest, I successfully used the following commands in the guest VM to enable network with a IP failover: ip route add ...
0
votes
1answer
51 views

Citrix Xen Server 5.6: Virtual Machines (VM) Deleted or Gone Missing?

In my environment I have a Citrix Xen Server (ver 5.6) with multiple VM's setup in my lab on a local partition mount. I arrived to my lab setup last week to find that my VM's have gone missing. The ...
2
votes
2answers
65 views

Does 'vim-cmd vmsvc/snapshot.create' create a functional backup of the guest?

If I create a snapshot with: 'vim-cmd vmsvc/snapshot.create' I can then transfer the file that creates to another system, or even to another vmware ESXi system. Setting aside the fact that ...
1
vote
1answer
29 views

Win7 VM network is flaky after migrating from Hyper-V 2012 to 2012R2 and upgrading integration software

I'm in the process of upgrading our Windows 2012 Hyper-V hosts to 2012R2. As part of this process, I am migrating existing VMs from the 2012 hosts to hosts that have already been rebuilt. These are ...
0
votes
1answer
24 views

weird bridge issue in KVM

on Centos 6.5 i have a bridge network connected to eth4 and my virtual machine (Centos6.5) running on KVM is also connected to that interface(vnet0) bridge name bridge id STP ...
2
votes
0answers
23 views

Can I convert a physical non-bootable sata volume to a VHD image for mounting in a VM as 2nd volume?

I'm converting physical machines in the office to virtual machines using Disk2vhd, and it doesn't list the second physical hard drive that is in one of the physical machines. Does that mean I cannot ...
0
votes
0answers
10 views

Are Xen 4.1 virtual machines compatible with XCP?

I have a couple of vm installed with Xen 4.1 (basic Xen Hypervisor), now I would like to install XCP packages on my wheezy server. I've read that XCP took control of the server disks and network ...
1
vote
2answers
94 views

Pros and cons of virtualization [closed]

I'm aware of many questions here discussing similar topic, but in this case, I'll try to be much more specific. One target scenario is small to mid-size ISV, the second scenario is an enterprise ...
0
votes
0answers
104 views

XenServer HA (failover VM's) without shared storage

In the university from Uruguay where I work, we have 2 IBM BladeCenter S with 4 server blades each one. Each blade have XenServer 6.2 installed and working. Our idea is have each BladeCenter in ...