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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1answer
12 views

How to edit the XML config file of a domain with virsh? [on hold]

How to easily edit the XML config file of a domain with virsh?
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0answers
23 views

Docker install continuously failing on Debian 7 [on hold]

I'm trying to install docker on Debian 7, but I am running into the following situation and it isn't covered in their tutorials. Any ideas? me@computer[04:46:05] ~ $ wget -qO- ...
0
votes
1answer
16 views

What FQDN should I use for Postfix setup in Satellite Mode on Ubuntu VM on VirtualBox?

I am getting lost with trying to configure Postfix on a Ubuntu 14.04 VM running on VirtualBox. The VirtualBox has 2 NICs: 1)NAT and is Internet access through my computer running the VM and ...
-2
votes
1answer
22 views

How can I deploy a virtual machine to a physical machine? [on hold]

I am in the planning phase of building a Windows 2012 server that will be at a remote location. The server has been picked out, but I don't have any specifics on the hardware. Here's the process I am ...
0
votes
1answer
20 views

Persistent ESXi iSCSI datastore from guest VM based target?

I'm in the process of building a home lab environment for Cisco and VMware that will also double as a NAS. The system runs ESXi v6.0 bare metal. Part of my design is that I have a Lenovo TS440 with ...
0
votes
0answers
7 views

How to hot add a new disk with virsh attach-disk?

I'm trying to add a new LVM disk to my guest machine (Ubuntu 14.04.1) by doing the following on the host: lvcreate -L 14G -n vm_vm005_data3 vg00 virsh attach-disk vm005 /dev/vg00/vm_vm005_data3 ...
-4
votes
0answers
24 views

Security of Virtualization [on hold]

i have three virtual servers and i need virtual switch with additional security capabilities.So how can i restrict,log and monitor VM-to-VM traffic involved routing the virtualized network traffic.
1
vote
1answer
36 views

how do I clone a disk that is represented by a vmdk file?

I have VirtualBox installed on Windows 8.1. I have created a CentOS 7 virtual machine that loads the contents of a detached hard drive that is connected to the PC via a SATA Wire. The virtual ...
0
votes
0answers
6 views

Can I install openstack shared services on a compute node?

I am currently evaluating Openstack as an alternative to VMWare for our company. I would like to install Openstack on a Dell FX2 chassis with three physical servers in it. I was wondering if it was ...
0
votes
0answers
16 views

Stucking qemu-kvm process

What i have: CentOS 7.1 as KVM host - Xeon E3-1200 v2, 32GB RAM, with and without dedicated raid controller (i tried both options) 3x Ubuntu 14.04.2 as quest VM (3 CPU, 512MB RAM on each VM) host ...
1
vote
0answers
9 views

Autostart VM on Witsbits (ClearVM) Server

I am setting up few VMs on my Witsbits (ClearVM) server. They are easy to setup and manage but... I would like to start VM together with the server. The management interface allows for manual ...
0
votes
0answers
15 views

Is it possible to migrate a Parallels Desktop Windows VM to Mac OS X BootCamp?

I have a Parallels Desktop virtual environment that includes software that cannot be reinstalled elsewhere. It's native to that VM. I'm running the environment on my Mac Mini and am seeing huge ...
0
votes
0answers
10 views

vboxmanage: Start Aborted VM

A quick question. How do you start a VM that is in aborted state from vboxmanage? It reports that it's succesful, but then does not run (as confirmed by vboxmanage list runningvms) In the ...
0
votes
1answer
17 views

Postfix not receiving mail for virtual domain from outside (only locally)

I have postfix mail server running at mail.123.com (ip eg 1.1.1.1), then I have site books.com (ip eg 2.2.2.2) and it's DNS records like this: MX record as mail.123.com A record mail.books.com same ...
1
vote
1answer
37 views

SSH fails often when contacting VM from remote machine

I have a Windows 8.1 Host in which I installed ubuntu server 15.05 in a virtual machine. I set an SSH server in the guest (ubuntu) and then I create a forwarding rule from the host port 2222 to the ...
0
votes
0answers
10 views

Application Virtualization Risk Through WAN / Internet

I was weighing pros and cons about the new mission critical system that through application virtualization, will allow my colleagues from 3 different countries to access it. Here are some background ...
0
votes
0answers
4 views

How to access LXC containers hosted inside a VM [migrated]

I have the following setup: Mac with VirtualBox installed Ubuntu 14.04 VM with LXC containers: DNS server (1.1.1.100) Web server (1.1.1.101) Content server( 1.1.1.102) Database server (1.1.1.103) ...
1
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2answers
25 views

Virtualization: vCPU pinning with Hyperthreading Host CPU?

I'm using KVM/libvirt on a Linux server with Core i7-2600 CPU, which has the following CPU topology (1 Socket, 4 Cores, 8 Threads): Physical | Logical ---------+-------- Core 0 | 0, 4 Core 1 | 1, ...
0
votes
2answers
20 views

How to check the number of CPUs and cores from host with virsh?

How to check the number of CPUs and cores available in the host machine using virsh?
13
votes
3answers
1k views

Virtual machines and I/O heavy workload, is it ever sane?

I have seen on numerous virtualization services (Azure) and products (vmware,kvm,hyperv) I/O and system stalls under heavy I/O workload. My questions are: Is it ever sane to use a Virtualized ...
0
votes
0answers
18 views

Proxmox Virtualized Client (Network Configuration)

first some information about me. I ordered a server from ovh and purchased one failover ip to test proxmox and do some training. The main Server is hosting proxmox(Example IP: 123.45.67.89 to figure ...
1
vote
1answer
57 views

Installing Server 2012R2 on VM with GPT harddrive issues

So... long story short I'm working on automated installations of Windows Server 2012 R2 on systems with GPT drives both physical and virtual. I haven't brought the disk back down stairs to the ...
0
votes
2answers
57 views

Should I backup from within each guest, or from the host?

I'm searching for advice on whether backups are better taken from within a guest (e.g. ShadowProtect), or from within the host (e.g. copying virtual disk files, or other software). We have 12 VM's (a ...
0
votes
1answer
49 views

Switching back to libxl from xend without rebooting

I did something dumb: I enabled xend over libxl and started an instance with xend. Now, libxl won't start any instances, even though I got rid of all the xend instances and stopped xend: root@xen1 ...
1
vote
1answer
11 views

How to prevent openvz container from adding another ip address?

How to prevent openvz container from adding another ip address ? I'm using VETH Container. I used this command to configure the network : vzctl set xxx --save --netif_add ethx,,,FE:FF:FF:FF:FF:FF
0
votes
0answers
49 views

How to pass boot paremeters to a XenServer HVM? Is it even supported?

I'm willing to build up a fully automated installation of CentOS 7 over XenServer 6.5 using kickstart. According to XenServer 6.5 Documentation, CentOS 7 is now supported in HVM mode: In XenServer ...
0
votes
0answers
16 views

hardware requirements for 4-6 VMs [duplicate]

I’m planning on buying HW for running 4-6VMs on my home network, hosting some web-pages and desktops and running an NVR for 3-4 cameras, and have no idea what I can get away with on the hardware side ...
0
votes
0answers
10 views

OpenSUSE Xen Multiple Apache VM's

I am attempting to set up an OpenSUSE 13.2 server with Xen Hypervisor installed. The problem I have now encountered, is how do I route the correct requests to the correct VM instances. Lets say I ...
0
votes
0answers
24 views

Automatically upgrade virtual machine in load balanced set on Windows Azure

I have been serving web content off of a Linux VM running in Windows Azure, and now want to make a duplicate virtual machine and create a load-balanced set to handle more load and avoid downtime. I've ...
0
votes
1answer
42 views

Convert virtual disk image to physical disk?

I'm trying to use QEmu for Windows to convert a virtual disk image to a physical SSD. But I'm not sure about the syntax for the output_filename parameter. Here's what I tried: qemu-img convert -p ...
0
votes
1answer
27 views

NAT forwarding (whole IP) working only on some ports

Since my hoster doesn't allow briged setups I had to go for a NAT solution to run my CentOS VM on an additional IP and my host machine on the primary IP. Now, I've got a problem since for ports 22, ...
1
vote
1answer
41 views

How to virtualize a dedicated server [closed]

I have a dedicated server with the following configuration : CPU : AMD Opteron 4386 Cores/threads : 8c/8t Fréquence/burst : 3,1 GHz+/3,5 GHz+ RAM : 64 Go DDR3 ECC 1066MHz ...
1
vote
0answers
61 views

How to assign dedicated vCPUs to specific VM on Proxmox (KVM) or what system could do that?

I'm posting this here, because what I've found about the topic is either outdated, incomplete or not suitable for various reasons. I have wanted for a long time to learn how to map specific vCPUs to ...
0
votes
0answers
35 views

Filtering KVM guests with IPtables

My partner has a server with OVH that receives a constant variety of ddos attacks, while still staying up. We want to use IPtables on the host to filter the guests VM's traffic. The guest VM we want ...
1
vote
4answers
132 views

Bare metal hyper-visor that supports viewing it's own guests [closed]

I'm trying to understand if it is possible to have a Type-1 Hypervisor (bare metal, no host OS) with the ability to view the guest(s) operating system(s) on the same machine. i.e. I have a XenServer ...
0
votes
1answer
53 views

What it means when Linux has no I/O scheduler

I have some virtual machines running Ubuntu cloud-based image 14.04-1 LTS version. I wanted to see the IO performance of different IO schedulers on the VM so I went to ...
2
votes
1answer
52 views

How much of a performance does using QEMU virtualization incur on Windows?

How much of a performance does using QEMU virtualization incur on a Windows host, when both the host and vm are running the same CPU? Older articles indicate that using kqemu avoided the slow down in ...
0
votes
1answer
64 views

What hypervisors support vGPU? [closed]

Does anyone know if any open source hypervisor supports vGPUs? It looks like XenServer and vSphere are the only two hypervisors that support virtual graphics cards (true vGPU, not passthrough or ...
0
votes
1answer
43 views

ubuntu kvm disk io slowdown after some tyme

Host system: Ubuntu Server x64 12.04 mdadm raid 1 (/dev/sda /dev/sdb) no lvm dd bs=1M count=256 if=/dev/zero of=filename conv=fdatasync avarage ~ 40 MB/s NCQ on disks is disabled WriteCache is ...
2
votes
1answer
105 views

Install RSAT-Hyper-V-tools fails on Windows Server 2012 R2 Server Core

When I try to install Rsat-Hyper-v-tools with powershell command: add-windowsfeature rsat-hyper-v-tools -includeAllSubFeature It fails with error saying that: The source files could not be ...
-1
votes
1answer
32 views

Xen hypervisor component/plugin development [closed]

I am new to virtualization as a concept, and am particularly interested in Xen. A machine is a complex system composed of many parts/constituents: CPUs (one or more) RAM Hard drive Network card ...
0
votes
0answers
25 views

Docker: display information for each pulled layer

Whenever I pull an image from a registry, Docker pulls not only the image, but also additional layers. Is there a way to tell docker to be more verbose about the layers? E.g., if I $ docker pull ...
2
votes
0answers
27 views

Ensure docker pulls most current image

Assuming I have registered a repo at Docker Hub, called MyRepo. Assuming I am working on a Docker image called MyImage. Assuming I have configured Docker Hub to build images from Dockerfiles ...
4
votes
1answer
57 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
46 views

Juniper SRX210 routing vlans

Ive got a Juniper SRX210 only using 2 ports Model: srx210he-poe JUNOS Software Release [11.4R2.14] WAN ge-0/0/0 up up ge-0/0/0.0 up up inet ...
1
vote
0answers
40 views

Azure VM - HTTP GET to Rackspace server is too slow [closed]

I'm testing a web service from my Azure VM and the test involves just doing an HTTP GET which returns JSON data from a Rackspace-hosted server. When performing this test from ANYWHERE but Azure, the ...
0
votes
1answer
28 views

Can I run multiple Linux instances within a RHEV-M VM?

My overlords have allocated me one VM and externally-routable IP for use on a certain project, and I've since discovered that the software that runs on this is essentially a singleton (no more than 1 ...
1
vote
1answer
101 views

Hyper-V VM very slow after live migrating to very similar hardware.

I live migrated Windows 2012 R2 Vose from Windows 2012 R2 server to another Windows 2012 R2 server running hyper-v. After the migrate this migrated Vose is running very poorly and uses lot of virtual ...
-2
votes
2answers
55 views

How do bare-metal/hosted hypervisors relate with hardware and software virtualization? [closed]

Do I understand it properly that Hardware Virtualization is basically a system with a bare-metal hypervisor and Software Virtualization is a system with hosted hypervisor? (And, therefore, because ...
0
votes
1answer
84 views

Recover an oVirt Hosted Engine Crash

I have an oVirt setup, and recently yum updated all packages in hosts and hosted engine. Problem is I can't start the hosted engine. After a while if you issue the command: hosted-engine --vm-status ...