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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8k views

How to stop/kill a virtual machine that hangs in “Stopping” state?

I have a virtual machine that constantly hangs in the “Stopping” state. I’ve red several posts suggesting killing the vmwp.exe process of the machine but I’ve never been able to kill this process ...
3
votes
0answers
44 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 ...
2
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0answers
37 views

Image build system that derives from a base Windows 8.1 image

For our VDI deployment, we have several Windows 8.1 images for target groups that require different suites of applications. The current update procedure requires us to update the OS on each ...
2
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0answers
106 views

Debian does not shut down interface with ip link set … down

I have a really specific question for a trunk-testing environment. I have this network setup: +------------+ +------------+ | | +-----+ | | | eth0 ...
2
votes
0answers
457 views

TCP Connection Issue Between Linux Machine and VMWare Windows Server

I have a TCP connection issue as follows. The setup: VMWare Virtual Machine: Windows Server 2008 R2 DataCenter SP1, IP: 192.168.2.111, DG: 192.168.2.254 Host Machine: Windows 7 Professional SP1, IP: ...
2
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0answers
266 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 ...
2
votes
0answers
34 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 ...
2
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0answers
1k views

Hypervisor The operation cannot be performed while the object is in it's current state

I attempted to reboot one of my VMs in the Hyper-V Manager. It's a Centos VM and all of my other centos machines are behaving as they should although I can't get this particular one to boot. I'm a ...
2
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0answers
592 views

How to increase CPU core speed of a guest to maximum of Citrix Xenserver Host

There is a Citrix XenServer 5.5 (HP ML370 G5, Xeon 2GHz) on this Server there is a Windows Guest (Windows 2008 R2 x64) under Properties I set 4 CPU Cores with max prio. But if I check with CPU-Z the ...
2
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0answers
256 views

Сan I use IOMMU for VT-d to give each virtual machine one at a time GPU?

If I use VMWare with 4 virtual-machines and 4 GPUs (nVidia Quadro/Tesla), then can I give (move) some devices to different virtual-machines for each by a single card? If I have one of these CPU, then ...
2
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0answers
176 views

Recompose a VMware vSphere machine without personal application data loss?

Our organization has converted a large percentage of our employees to VDI. Our logic is that we create a master image for each linked-clone pool, dedicate each linked-clone pool to specific purposes ...
2
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0answers
829 views

How to config libvirt network setting about disabling dnsmasq “except-interface=lo”?

Here is the thing. My VMs run with libvirt and use default network libvirt-provide, and I've mad each VM registers its hostname to dnsmasq set by libvirt. so I want to look up its hostname for ...
2
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0answers
4k views

VNC faster than Spice for remote access to KVM guest?

Having used RDP before, I'm not exactly thrilled with the performance I am seeing from VNC to my KVM virtual machines. The KVM host is Ubuntu 12.04 server x64. I've read that Spice is faster, and ...
2
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0answers
581 views

Debian Squeeze Preseed Installation “The current kernel doesn't support the Logical Volume Manager. You may need to load the lvm-mod module.”

I'm attempting to install Debian Squeeze via an instalinux.com image pre-seeded with more or less default settings. (Only notable addition is the openssh server, which is a clickable option in the ...
2
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0answers
215 views

virtual memory commited

After a server bounce happens, and after around 40-45 days time period, we receive continuous “Committed Virtual Memory” alerts which indicates the usage of swap space in the magnitude of >4GB This ...
2
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0answers
216 views

Xen and Turbo Boost

Running the Debian Squeeze default Xen, I am unable to get any of the CPU frequency scaling stuff going. As soon as I revert to the standard kernel I get it. Digging through the internet it seems ...
2
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0answers
365 views

How to configure opennebula for allowing a cluster private network to host images with public IPs

I am installing open nebula 3.4.1 for running virtual machines a (kvm based) cluster made of 5 computers: a front-end machine having 2 network interfaces and 4 slaves machines with a single network ...
2
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0answers
181 views

Performance Implications of running multiple Virtual Servers using one base virtual disk?

I tried looking through old questions, but couldn't find one that hit this exact question. In VmWare's documentation on Snapshots, they mention utilizing them for a "process tree" setup. This would ...
2
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0answers
80 views

Exchange Failover causes .ost issues - hownto avoid

Using virtual machine for running exchange and backing it up with a mirror virtual machine in case of failure. During testing of failover and fallback We run into an issue when we fail over the local ...
2
votes
0answers
198 views

Deploy multiple applications in Cherokee and distinguish them by port?

I am having an issue on deploying applications with Cherokee web server. The thing is I need to host various Django applications in the same machine and distinguish each one by ports (i.e. app1 in ...
2
votes
0answers
731 views

need some way to convert QCOW2 to OVF or open QCOW2 on WINDOWS

is there a way to convert QCOW2 to OVF? or is there a way to open an QCOW2 on WINDOWS (preferably free/open source)? the problem is that ubuntu's virtual machine manager was used to create the image ...
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0answers
36 views

ESXi 5.5: more than one hour to power up a Win2K VM

Around one year ago I installed an ESXi 5.5 to virtualize an old physical Windows 2000 server that, unfortunately, cannot be easily upgraded/migrated/replaced. Main ESXi datastore was created on top ...
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0answers
27 views

Hyper-V Replication Failures

I have 2 sites with failover clusters running Hyper-V 2012. When I started this job the production website (site A) was on Server 2008 running Coldfusion 9, SQL 2008 all on one machine. I upgraded ...
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0answers
37 views

Hyper-v virtual machine acting as two separate vm's

I have a Hyper-V virtual machine (vm1) that has two separate instances of itself. I can log into what should be the same VM (vm1) through Hyper-v and RDP (Remote Desktop Connection) with the same ip ...
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0answers
47 views

Datastores Occasionally Disappear on vSphere Client

I'm currently running several virtual servers and connecting to the vCenter using the vSphere Windows client. We're connecting with to a datastore on another server which has a separate folder for ...
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0answers
35 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 ...
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vote
0answers
99 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 ...
1
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0answers
44 views

Cross-platform filesystem watcher, running in VM watching host?

Can anybody suggest a way to copy data from a VM's host to the VM[0] in way that is cross-platform across hosts (i.e. Windows, Mac or Linux)? Right now, I'm achieving this by running rsync in the VM ...
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0answers
131 views

Access to equally defined VM in different VLANs

I have a working libvirt cluster and in order to perform some paralellization I have duplicated it. At the moment my scenario looks like this: two clusters whose VM definitions are exactly the same, ...
1
vote
0answers
99 views

OpenVZ : live migration fails

I can't launch live migration of OpenVZ container between two proxmox nodes... Feb 05 03:30:27 starting migration of CT 102 to node 'madrid' (xx.xx.xx.xx) Feb 05 03:30:27 container is running - using ...
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0answers
131 views

Configuring Proxmox Cluster Storage

We are configuring proxmox on our servers at two locations each location has; 1 x hp c7000 enclosures with 16 blades 1 x hp proliant dl585 We also plan to add a 24TB SAN to each location. We are ...
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0answers
167 views

When i use virt-install --import, virsh vol-list --pool default return null

I upload my guaji.img file to server, and use following code: sudo virt-install -n guaji -r 512 --os-type=windows --os-variant=winxp --disk #{to_rmt},device=disk,bus=virtio --noautoconsole --import ...
1
vote
0answers
72 views

Why won't my libvirt VM communicate with apt repositories when wget and ping work?

I'm trying to use Vagrant and Puppet to make it easier to duplicate a multi-server setup for our websites. The recommended workflow is to vagrant up the puppetmaster server specifically first, and ...
1
vote
0answers
107 views

how to design network for virtual machines with just one nic

for the past week or so i've been recovering from the shock that i have literally no idea how my isp's network works, by getting a new box and trying to do a sensible design from scratch. our design ...
1
vote
0answers
356 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 ...
1
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0answers
61 views

XenServer pool, unable to access certain networks from 2 servers in pool

I have Xenserver pool of of 3 xenservers, at version 6.1. After we got a serious DDOS attack on our network, all servers got rebooted (whole pool of 3 servers got restart and entered into maintenance ...
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0answers
56 views

How to handle virtual environments on a secure network

We do embedded software development. As such, we use a wide variety of tool sets for the many different targets that we work with, and we frequently move from one project to the next. Developers ...
1
vote
0answers
149 views

Convert an HVM ec2 instance into something that can be run on a PV instance

I have a linux VM running on an esx-i server at home, and I would like to import the vmdk to aws using the ec2-import-instance command. However I really don't need this to be any larger of an ...
1
vote
0answers
312 views

Virtual Machine IP address type changed from static to dynamic

I am testing VMM in a lab environment, I have one VM host machine with one physical network adapter that has been allocated an IP address in the 192.168.1.0/24 subnet on a router. I have create ...
1
vote
0answers
440 views

VSFTP and openLDAP based virtual users home directory

I have a VSFTPD server based on CentOS 6, configured to authenticate virtual users against an openLDAP server. I can login to the FTP server, however, authenticated users are not redirected to their ...
1
vote
0answers
122 views

Red Hat Virtualization, slow DB writes or network from virtual machine

I am running JBoss on both a physical machine, and a VM that runs within that same physical machine. The JBoss instance on physical machine is operating fast, but the JBoss on VM is slow (several ...
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0answers
70 views

How to use kexec to do a live upgrade of hotswap ram on a CentOS vm image?

Just as the question states, is there a way and what's the best method todo a live ram upgrade with kexec?
1
vote
0answers
628 views

CentOS 6.5 Xen Virtual Machine Issue 'this function is not supported by the connection driver'

I am trying to segment my system into a number of virtual machines but just cant seem to get this to work. I think I am close but not quite there. I have install xen, virsh, xl etc and I am using ...
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0answers
86 views

How can I export a XenServer virtual machine with all its snapshots?

Is there a way to export a virtual machine running on XenServer with all its past snapshots? I have tried to export a VM through XenCenter (right click on the machine and "Export..."). After importing ...
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0answers
266 views

How to install Gitlab in a VM on a production server?

I have a production server running Ubuntu 12.04 and I would like to install on it a VM with Gitlab (using Vagrant and Virtualbox). Let's say that the address to access Gitlab is gitlab.mydomain.com . ...
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0answers
296 views

Hyper-V: Ubuntu guests running out of memory

We appear to have a problem with Ubuntu guests running out of memory. We have several on 12.04 (LTS) and one on 13.04 and seem to have the same problem. It takes around 30 days from restart to ...
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0answers
254 views

Windows User State Virtualization guide

Microsoft have a concept called User State Virtualization (USV) this is a solution based on redirecting some of the profile folders to a central server. For laptops it also means using offline files ...
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0answers
584 views

Ghost “vlan 0” tags added to ethernet frames in CentOS guest under OpenStack

I'm trying to debug an issue involving a KVM virtual machine instance where the instance doesn't respond to network requests when the source is on another physical machine, which is on the same subnet ...
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0answers
86 views

OSPF on XEN host running several VMs

Is it possible to set OSPFs areas in a XEN environment to setup a virtual cluster? Main intention is to avoid a external router since all VMs will run inside the same machine.
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0answers
241 views

Cannot upgrade xenserver,pool master changes automatically to other server

I need to upgrade my XenServer pool of servers from 5.6 to 6.1. The problem i am facing is that when i shutdown pol master to boot it from CD, then it other member in the pool become the pool master ...