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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8 views

Cloud based office network [on hold]

Is it possible to have a cloud based company network? Presently our small company uses a workgroup with shared folders and the like. We would like to set up a network with that provides domain ...
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19 views

ProxMox I/O Errors on EXT4 FS [on hold]

I recently got ProxMox up and running after months of deliberation as to which HyperVisor I wanted to use. Last night I almost finished transfering my applications to containers and the system was ...
0
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0answers
8 views

Do I need acpid daemon in virtualization guest?

I get VPS with KVM virtualisation (server for hosting services). I remove most of desktop services (like dbus, consolekit, xorg) because of security and stability concern. Guest run on virtualised ...
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0answers
13 views

How to make paravirtualized xen template

I want to know how to make my own linux OS (CentOS, Fedora, Debian, Ubuntu, Gentoo, Slackware) template compatible with paravirtualized xen with pygrub kernel, ext4 filesystem and xvida device I ...
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0answers
7 views

virt-manger cannot access VM disk

On a Centos 6.7 I have installed kvm and created a vm with a 30G virtual disk located in /var/lib/libvirt/images/vm1-disk. I created another disk with the following command: virsh vol-create-as ...
1
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0answers
21 views

Java application is slow in virtual server (KVM)

I have a Java web application, which runs from JAR, starts embedded Tomcat and is using Spring Boot. Problem is that it runs very slow when running in KVM virtual guest. The same application in the ...
1
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0answers
14 views

How does Qemu handle memory?

I'm having a real hard time understanding something and I was wondering if anybody has any experience with this and is able to help. I have two KVM VMHosts, one running qemu 2.4.1 and the other ...
0
votes
0answers
10 views

Is host process listening on virtual interface added to virtual switch possible?

I have a working setup of three virtual machines (on VirtualBox) bridged to tap devices added as ports to Open vSwitch. They are able to communicate. Now, I would like to make a host process (one ...
1
vote
2answers
46 views

How can I determine the performance penalty of VT-d vs. baremetal?

I am looking to configure my server in a slight odd way to create a private cloud setup. I have to take the HBA that my storage disks are tied to and pass it into a VM (probably xen) to allow the ...
1
vote
1answer
11 views

Manage Windows Server 2012 and trunk the Hyper-V VM (same physical NIC)

I'm trying to use Hyper-V to deploy a pfSENSE box inside of it. But, the scenario is: 3 VLANs VID: 1000 VID: 2000 VID: 3000 On a physical switch port, I've tagged the Server physical port with ...
5
votes
2answers
114 views

Hyper-V Virtual Switches and DHCP

What is the best way to force VLAN segregation accross multiple Virtual switches? I have probably a rather complex setup going in the effort to get essentially 4 separate virtual switches. The ...
0
votes
1answer
22 views

Correct virtio setup on Ubuntu 14.04 64-bit host

At the present moment, my guest is running inside qemu and host is kvm intel, running Ubuntu 14.04, kernel is 4.3.0 stable. From within the guest, when I run "hdparm -i /dev/sdb" on the guest, I ...
0
votes
0answers
23 views

Verifying VT-D / IOMMU Support (VGA Passthrough)

I have a 4790K I'd like to use VT-D with for hardware acceleration in a Windows guest VM (Dom0 = Ubuntu 14.04) using Xen. Intel's website CLAIMS the processor supports this: "Intel® Virtualization ...
0
votes
0answers
8 views

Using one powerful computer in a virtual environment vs using one powerful computer? [duplicate]

The title explains most of it, I want to know if it's more efficient to have one computer using VMWare vSphere to host servers on different virtual operating systems that only has one server per ...
0
votes
0answers
2 views

docker : When creating a machine VT-X/AMD enabled yet [migrated]

I'm going through this tutorial Dockerizing Flask With Compose and Machine - From Localhost to the Cloud When trying to create a virtualbox with the command below docker-machine create -d ...
0
votes
0answers
17 views

Assign a large subnet of IPs to KVM Guest VM

I have KVM host node running a few VMs. I create them using SolusVM panel, however they don't have an option to add bulk IPs in one shot to a guest VM which is silly. I'd like to know how I can add a ...
0
votes
0answers
8 views

OpenStack Swift: PID files don't correspond to running processes' PIDs; can't restart services - port already bound

I am running a Docker container with Swift ("Swift all-in-one") on a CentOS 7 host. I noticed that the PIDs in /var/run/swift/*.pid files differ from the actual PIDs running in the system: ...
0
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0answers
8 views

Virtual Host Issue on 1&1 with Debian Server

I'm running a Debian 8 LAMP server with Apache Virtual Hosts configured. I've had it running for a couple years. I recently added a second site and config. When I modified my remote system on local ...
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0answers
21 views

How to install nested virtual machine on Google cloud VM

I have setup a nested virtual machine environment on a Google cloud VM, I aim at hosting a legacy system (converted to vm) in Vmware Player, unfortunately, I frequently encounter system crash when ...
0
votes
1answer
33 views

oVirt engine 3.6 in local Internet **connectionless** network

I wanna use oVirt engine 3.6 in my Internet connectionless network. I installed oVirt with yum over internet. After that I tried to work offline. When I go offline Web Interface it still works fine. ...
1
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2answers
41 views

Live Migration - Switch Infrastructure

We will be deploying into an environment intended for maximum resilience/redundancy and the capability for rapid scalability. Context This environment is: 1 x NAS server with FreeNAS RAID 2 x ...
2
votes
2answers
124 views

Is docker suitable to be used for long running containers?

I'm currently migrating from a powerfull root server to a less powerfull and most notably cheaper server. On the root server i had some services isolated into separate VMs. On the new server this is ...
0
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2answers
36 views

How to migrate a Hyper-V VM from a Desktop PC to a Hyper-V cluster?

Migrating a VM with VMware is easy, from a Workstation to vSphere cluster it can be done with a VMware Converter. I have little experience with Hyper-V though. There is a VM on a Hyper-V on Windows ...
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votes
0answers
21 views

Which will be better for php application: apache cluster, or virtualized cluster

Company where i'm a sysadmin growth a lot last year, and in this year we expect even more. So we need to rebuild the infrastructure. Our PHP CRM works on apache and mysql. Production environment has ...
0
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2answers
24 views

OpenVZ Container cannot access internet

I have Daedicated Server, and I want to split it on two virtual servers with two diffrent IP Adresses. I bought two exetrnal IP adresses for this server and now I have three, one Main Address, one for ...
0
votes
0answers
11 views

VHD from live running (CentOS) linux?

my setup: I have a XenServer and on it run a virtualized CentOS. For some reason I can't move/export/edit the disk inside XenServer. So my idea was to create inside CentOS a vhd and directly export ...
0
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2answers
33 views

Can't install Solaris 10 on XenServer 6.5 VM

I have XenServer 6.5 installed on a server, and i have been trying to install Solaris 10 on a VM, it just get into the boot screen of the installation ISO, i proceed with ENTER and then this message ...
1
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0answers
51 views

KVM bad IO sync performance in Linux guest

I'm setting up virtualized Ubuntu 15.10 guest inside Ubuntu 15.04 server using libvirt and KVM. Storage in host system: # mount | grep ext4 /dev/sda1 on / type ext4 ...
4
votes
1answer
31 views

how to configure sendmail with multiple ssl certificates for multiple domains

I need to configure a server to host multiple email domains on a single IP, and thus install multiple ssl certificates. Miraculously, I have been able to get apache and dovecot to work with multiple ...
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votes
2answers
50 views

How could I share a dedicated IP amongst multiple servers?

I'm trying to split up a big server for a few people. They aren't going to run a website on it or anything like that but they want to at least connect to the server remotely. My hosting provider is ...
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votes
2answers
39 views

Methods for installing rpms as a non-root user using apt? [closed]

There is a webpage describes a method for installing rpms as a non-root user using apt. This page describes a simple method for installing the CMS software rpms as a non-root user using apt. A ...
0
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0answers
13 views

how to integrate sendmail virtual users + dovecot + full email address as username

I need to build an email server to process virtual users for several different domains using ssl on a single server. I know how to do that with a single domain using system users + sendmail + ssl + ...
0
votes
2answers
26 views

How to limit acess between two Azure VM with ACL?

I have two virtual machines for database and app server and I want the app server and only the app server to connect to the database server. These are in the same vnet. I am trying to do this by ...
2
votes
2answers
80 views

Virtual Machines in Windows Server 2012 Core Hyper-V going Off-Critical

I have a server running Windows Server 2012 Core Hyper-V. This server currently hosts two virtual machines (one Windows Server 2008 and one Windows Web Server 2008). Occasionally, without any warning, ...
0
votes
1answer
49 views

Hyper-V VM moving went wrong

I had a little project to move our DHCP server from an old host to a new one. It looked dead simple.. but after I moved it manually ( copying vhd to new host and then configuring VM there) the Guest ...
0
votes
1answer
18 views

Files left over after removing KVM guest

Looking at this post I ran the following commands to remove a VM: sudo rm /var/lib/libvirt/images/centos01.qcow2 sudo virsh undefine centos01 --managed-save --snapshots-metadata But it looks like I ...
3
votes
0answers
36 views

how to configuring secondary IP subnet that is directly routed to WMware ESXI main IP

I have a ESXI 5.1 which comes with a /29 Block IP (EX. 70.60.50.0/29) and the ESXi management address is frist usable addres 70.60.50.2, also i have a secondary /27 IP block (10.20.30.0/27) which is ...
7
votes
0answers
168 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 ...
4
votes
1answer
220 views

WARNING KVM acceleration not available, using 'qemu'

Running debian (Linux Rick 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u6 (2015-11-09) x86_64 GNU/Linux) Looking at my cpuinfo I can see I have vmx support: flags: fpu vme de pse tsc msr pae mce ...
0
votes
0answers
13 views

Database on Virtual Machine getting corrupt

Primary Domain Controller - Windows Server 2008 R2 Standard (installed on Physical Server) Secondary Domain Controller - Windows Server 2008 R2 Standard (installed on Virtual Machine i.e Vmware EXSi ...
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votes
1answer
45 views

Can I run VirtualBox with Bridged adapters on EC2 and GCE

I have a Ubuntu 14.04 host on GCE and I want to run a VirtualBox VM on it. The guest is also running Ubuntu 14.04. I want the VM to be visible to other machines in my VPC and bridged adapter seems to ...
0
votes
1answer
39 views

Re-add Machine to domain without Renaming it? Cloned Virtual Machine issue

So I have some old XP machines that are being kept around to run an ancient DOS based database we still need occasional access to. I decided to instead of dealing with all these old buggy machines to ...
0
votes
0answers
7 views

configure burst ram for openvz container

Can somebody help me out as to how can we set the burst ram for OpenVZ container using proxmox API. I tried using the following command but with no success: pvesh set /nodes/pve/openvz/{vmid}/config/ ...
2
votes
2answers
93 views

Any known fixes for Hyper-V host networking randomly stops responding?

We run several HP DL380 Gen8 servers as Windows 2012 R2 Hyper-V hosts. Randomly, they stop responding on the customer NIC (ie the one connected to the virtual switch). Customers are disconnected from ...
2
votes
2answers
41 views

How to require all network activity to pass a KVM guest firewall before reaching the host?

Most of the information I've come across tends to set up a KVM firewall using a bridge connection. From my understanding it is a security risk if network traffic can reach the host without having to ...
1
vote
1answer
26 views

pfSense security: is the host of a virtual pfSense firewall accessible via ssh when the network interface has been assigned to pfSense?

Can the host of a virtual pfSense machine be accessed (via ssh) when the WAN interface is assigned to pfSense? Would the drivers need to be installed on the host, guest or both? Would it respond to ...
0
votes
0answers
19 views

Cant set extra option to VPS in proxmox 3.4

I am using Proxmox VE 3.4 to create an openvz container...i was able to create a vz container but i want to know are the advanced option like VNC, ppp, tun tap feature available in proxmox VE on any ...
1
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1answer
19 views

Distribute application as virtual machine but require external storage

I'd like to distribute a Web application as a VM image in order to make distribution, installation and maintenance as easy as possible for customers (virtual appliance). This image should include ...
0
votes
1answer
33 views

Confused about virtual network interfaces needed for network

I am relatively new to networking and have researched a lot about the topic however I am still confused as to what kind of virtual set-up I need. I have linked a diagram of the network over here: ...
0
votes
0answers
45 views

VMware Horizon View 6 Connections Fail w/ Changing Server Names

One of our Horizon View machines has intermittent issues connecting to its host via PCoIP. I do not have extensive Horizon View experience, but when looking through connection logs, I noticed that ...