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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246 views

Ext4 cache options on a virtual machine

I'm trying to speed up a standup of virtual machines used for development / automated test environments and wanted to verify some assumptions about disk writes caching. I'm using ext4 for the root ...
3
votes
1answer
89 views

How can I stop Azure from randomly replacing network cards on VMs?

Azure seem to have the habit of randomly changing the hardware configuration of virtual machines, without telling anything to the user. This is of course mentioned in the documentation, although ...
3
votes
1answer
718 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 ...
3
votes
1answer
1k views

Adding virtual NIC to HyperV VMs killed my network speed

I have a pretty simple configuration: Windows Server 2012 Hyper V Host, with two VMs (both Server 2012), one for IIS, one for SQL Server. They're all connecting through the physical NIC Last night I ...
3
votes
1answer
385 views

I can't install windows 64bit on Virtualbox headless

I'm trying to install Windows2008r2 64bit on a Ubuntu 12.04 64bit host. After created the VM (with --ostype windows2008_64 I boot up the installation iso but windows says: Attempting to load a 64-bit ...
3
votes
1answer
131 views

xend doesn't bring up the vif interfaces

I'm trying working with Xen and I've tryed to build up a virtual machine in domU. I'm using the following configuration for the domU kernel = '/media/home_separata/domU_kernel/boot/vmlinuz-linux' ...
3
votes
1answer
438 views

(Virtual) Windows Server console: Black screen

When connecting to our virtual Windows 2003 Server (SBS 2003 SP2) via a normal RDP session, everything works fine. However, when connecting with /admin to get to the console session, the following ...
3
votes
1answer
613 views

With CentOS 6 and LXC, “ifconfig” is unable to see network interface (but busybox “ifconfig” works fine)

I've just started working with LXC under CentOS 6 (via the libvirt adapter). If I create an LXC container, I'm unable to see any network interfaces when using the native system tools: # ifconfig -a ...
3
votes
1answer
158 views

Is there any simple, free tool to track VM dependancies to linked-clones in VMWare?

We have a few "base installations" of various OS environments that we use to create linked clones in VMware Workstation. Sometimes, to save space and because speed is of secondary importance, those ...
2
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1answer
250 views

VMWare vSphere 5.5 management interfaces unreachable

I've got a vSphere 5.5 Essentials Kit; One of the hosts, a Dell R410, is running vSphere 5.5 and as of yesterday it is unresponsive to any of the management tools. I've tried the following: Web ...
2
votes
1answer
40 views

Saving the State of an Application using App-V or some other type of Virtualization Technology

I have an application that I would like to be able to create "snapshots" of (sort of like you might do with a virtual machine). Basically I would like to be able to allow the user to do a bunch of ...
2
votes
1answer
124 views

Copy an Amazon EC2 Instance to use locally

Ok, so we have a spare server I have installed Debian Wheezy on, and setup Xen on for virtual machines. It has better performance than all our ec2 instances combined, and will cost less to run (for a ...
2
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1answer
234 views

Can't lock vz with proxmox

I would like to backup my virtual servers to move them away. And when i have started the backup process then i only see this every time: Feb 09 08:40:34 INFO: Starting Backup of VM 101 (openvz) Feb ...
2
votes
1answer
341 views

Does CloudStack support the Open Virtualization Format (OVF)?

The questions says it all. Can someone tell me the answer please? I have researched but I'm still not sure. Thanks.
2
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1answer
487 views

Anyone using Archipel in production for managing virtual machines?

I am getting ready to deploy a new server for my company. We intend to use virtualization mainly for security but also to help with versioning and other issues. We have decided to use openvz. Now I ...
2
votes
1answer
758 views

virt-install kept on adding --no-reboot - even though I don't want it to

I have a bit of a problem getting my guests to reboot after the OS installation using virt-install. For whatever reason, virt-install insists on inserting "--no-reboot" when you create a VM: ...
2
votes
1answer
418 views

Setting up reverse proxy for virtual machines on HostOS

I am currently installing a server that consists of a Virtualization Host (kvm on ubuntu) and 7 VM's, some running MySQL and LDAP, others running different webservers and webapplications. The VMs ...
2
votes
1answer
477 views

Installing and running a guest OS on KVM-qemu with only serial console access

I am trying to installing a bsd distro with virt-installer. With a Linux distro I used this: virt-install -n debian -r 1024 --vcpus=1 --accelerate -v --disk ...
2
votes
1answer
119 views

Strange CPU usage on Windows Server 2003 vs. CentOS5.4

I have two Virtual PCs running Windows Server 2003 and CentOS 5.4 on a host machine. I use a java server on both of them. I copied the java server's files from the host machine on to both of the ...
2
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1answer
354 views

Process PHP files from a network share in a vmware virtual machine

As a testing environment, I have set up a vmware virtual machine running Windows Server 2008 R2. I have Apache and PHP installed (as part of the xampp package). I am doing the development outside of ...
2
votes
1answer
1k views

How do I configure a guest VM's static IP address automatically in Citrix XenServer?

To facilitate automation of guest VM provisioning, how do I set (in a script) the IP address on a guest VM's NIC (or NIC's) once a new VM has booted? Is there a way to "inject" netsh commands via the ...
1
vote
1answer
66 views

Promiscuous mode in KVM

I have cloud system based on Openstack Icehouse-version. Now I want to test newer version of Openstack (Juno) inside my existing cloud. All hosts and guests use Ubuntu 14.04 as their OS. KVM is ...
1
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1answer
75 views

Unable to ping between ESXi host and Netapp storage on the same switch

I am unable to ping between ESXi host and Netapp controller that are both connected on the same switch and configured for private IP addresses. Yet I CAN ping between 2 Esxi hosts and between 2 ...
1
vote
1answer
107 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 ...
1
vote
1answer
313 views

vanilla ubuntu-vm-builder on i7 aborts aborts (with PAE?)

host: intel i7-4* cpu, running linux kubuntu 14.04 guest: attempting to create. ubuntu-vm-builder kvm saucy eventually, Get:1 http://archive.ubuntu.com/ubuntu/ saucy-updates/main ...
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1answer
155 views

5-7 second latency between Apache server and MySQL server when website calls on database server

I am currently running a virtualized environment for my web and db server. When I access the web server or the MySQL server individually, they are both fast. I also have websites running on the web ...
1
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1answer
132 views

(simple) linux HA with vmware vsphere?

I hope my upcoming question is specific enough, and you are able and willing to support :-) We have several openSUSE VMs in an ESX-Cluster (three ESX-Servers) with an attached iSCSI-SAN. All of ...
1
vote
1answer
278 views

IPv6 Routing / Subnetting

Recently I have installed Citrix Xen Server 6.2 on a machine. My Provider (Hetzner) gave me the IPv6 Subnet 2a01:4f8:200:xxxx::/64. Followed an article in the providers wiki (1) i got it working and ...
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1answer
220 views

HP ProLiant DL160 Gen5 Virtualization

we want to create some vm's on older server. Its an HP ProLiant DL160 Gen5 with an Xeon 5405. So by the intel specs (http://ark.intel.com/products/33079) the cpu included the VT-x technology. But ...
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1answer
79 views

User-specific alias for virtual machine

Our systems people are working on getting us all up and running on virtual machines. There will be a certain set of machines for each performance level, and we'll be able to upgrade and downgrade as ...
1
vote
1answer
1k 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
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1answer
426 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 ...
1
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1answer
286 views

Changing the mac address in a libvirt xml config file breaks network connectivity for the guest

I'm using Xen with libvirt and trying to set it up on a bridged interface. I am able to install an OS and everything works as I would expect. If I save the xml output from "virsh dumpxml guest", edit ...
1
vote
1answer
248 views

How can I manually add packages to cobbler repo (RHEL/CENTOS)

So I have an air-gapped network. We primarily use RHEL, sometimes CentOS. I'm building a utility "cloud" that needs to be able to kickstart from bare metal, as well as provision vms and kickstart ...
1
vote
1answer
1k 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
1answer
424 views

Hardware Virtualization Technology Enabling Issue

I have purchased an Intel i7 3770 and an Asus P8Z77-M Pro; for some Windows Server 2012 testing. In the BIOS I have enabled the "Intel Virtualization Technology", and have several Hyper-V based ...
1
vote
1answer
211 views

Apply libvirt nwfilter without editing of XML

Is it possible to apply libvirt's network filter to a KVM guest without manually editing the XML (for use in scripts)? Or is there any easy way of pushing the network filter configuration into ...
1
vote
1answer
66 views

EC2 Ubuntu images for local usage

Ubuntu provides virtual images that are used by Amazon EC2. They can be started locally e.g. by running: qemu -fda precise-server-cloudimg-i386-floppy -hda precise-server-cloudimg-i386.img ...
1
vote
1answer
488 views

How do I measure and compare disk performance of my Hyper-V Windows VM?

I'm not sure whether this sounds stupid or lazy, but I'm really not sure. I have a problem with the performance of a VM setup (2008R2-64bit Hyper-V running a 2003R2-32bit Windows server) and I'd like ...
1
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1answer
359 views

Hyper-V Test Bed for Forefront TMG 2010 Networking Issues

I am trying to set up a Server 2008 R2 test bed for a Forefront TMG 2010 deployment and I can't seem to get the networking configured correctly. The set up is as follows: Hyper-V Host has two NICs, ...
1
vote
1answer
454 views

Give a KVM Guest only access to OpenVPN

I'm in a kind of weird situation where I need to do the following: Connect an OpenVPN tunnel with static RFC1918 IPs (think of 10.3.3.1 for the server end and 10.3.3.2 for the client end) and have it ...
1
vote
1answer
367 views

Windows Server 2008 as Bridge in virtualbox: make another Virtual Machine enter his Domain

I have installed a Windows Server 2008 in Virtualbox(bridge) this one work fantastic! i want to make a virtual machine(virtualbox) which can enter the Domain and access my Server 2008(Datacenter). ...
1
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1answer
64 views

Does Microsoft Virtual Machine Manager Support Storing VHDs on File Server Share?

I have a Hyper-V server running perfectly fine with the VHDs placed on a separate file server shared folder. Now when I install MS Virtual Machine Manager and add the host machine to VMM, it says ...
1
vote
1answer
343 views

virtio /proc/net/dev

we are doing some VM (citrix-xen) / real machine benchmarks at university and ran accross a strange behavior. we used netperf's stream test to meassure the performance between the two machines. both ...
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44 views

how to programatically create an ubuntu vm

I have to create an ubuntu virtual machine within kvm/libvirt with a specific configuration for a specific set of tasks. I want to do it in a programmatic and reproducible way. I checked out ...
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197 views

Why does Xen fail to create domUs/start the virtual network interface?

I have received two errors while trying to create a new domU on Xen. First, I received this error: Unable to complete install: 'POST operation failed: xend_post: error from xen daemon: (xend.err ...
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0answers
59 views

How can I virtualize a running server but exclude directories so the resulting image is smaller than the drive

Following situation: There is a Ubuntu 10.10 Server running with many custom configurations and programs (can't set it up from scratch). One of these programs stores a lot of data (> 1TB) in ...
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113 views

Converting Physical machine to Hyper V VM

I'm running a Physical machine with Windows 7 Ultimate mainly as a file server with 2 hard drives with all the file content stored on D drive with C mainly for OS. This file server is accessible by ...
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0answers
119 views

how to carp two interfaces on same node?

I have this CentOS machine with 2 interfaces. eth0--> br0 (.10) eth1--> br1 (.11) Although part of the same network, each interface is being fed from a different switch. I use each bridge in ...
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18 views

Pfsense edge firewall .. DMZ … pfsense internal firewall + squid

i want to setup Pfsense on edge .. DMZ .. Internal PFSENSE with squid + squid Guard + lighttp for reporting... Internal Network. edge firewall will have 2 wans on loadbalancing & failover. ...