A virtual machine (VM) is a completely isolated guest operating system installation within a normal host operating system. It is a software implementation of a machine (i.e. a computer) that executes programs like a physical machine.

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2
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1answer
55 views

Is the ethx mac address of a VM the same as the mac address of the corresponding tap interface?

I have a single node openstack install on an ubuntu machine. For some reason that I cannot figure out, the linuxbridge is dropping packets from this VM. My iptables seem to be fine (atleast as far as ...
0
votes
0answers
129 views

XenServer API - free memory incorrect

I am trying to get server info from a VM using the Citrix XenServer API, and the XAPI RRDs. The API itself returns some semi-useful data like last boot time etc, but I'm really after available memory ...
1
vote
1answer
371 views

How to direct connect two virtual machine's NICs on vmware player?

I have two virtual machine on vmware player both, each have a NIC card. I want to direct connect VM1's NIC to VM2's NIC, not bridge, not NAT, not Host-only, just direct connect like connect through ...
0
votes
0answers
65 views

CentOS 6 network failling to connect network after exporting VM from VirtualBox to VMWare Player

I have installed a CentOS 6 virtual machine in VirtualBox and I want to export it and use it under VMWare. But after exporting, network does not work. There are some other interfaces created with the ...
-1
votes
2answers
323 views

How to setup multiple VPS or virtual machines on a VPS hosting account? [closed]

Let's say you have a Linux VPS hosting account and you wanted to add several VPS's inside that VPS or virtual machines, how can you do this? A scenario could be that I wanted to install an IIS server ...
2
votes
1answer
89 views

Configuration Defaults for VMWare vSphere Virtual Machines

We have a number of hosts running VMWare ESXi 5.5 all attached to a vCenter instance. We access and manage all of our VMs with the vSphere Web Client. A number of people who do not necessarily have ...
-2
votes
1answer
44 views

How could I give KVM more hard disk space [closed]

I want to use kvm as virtualisation software, but it is difficult. Is says that I dont have space on the node, that is not true. How could I solve this big problem? http://prntscr.com/2rlcq1
1
vote
1answer
209 views

KVM virtual machine boot messages

Just wondering if anyone knows of a way to stop the following boot messages with a centos 6.5 vm created with qemu-kvm When I start the vm there is a slight delay as the vm posts the following boot ...
1
vote
1answer
91 views

exactly 90 seconds to restart apache httpd

I have an openSUSE 13.1 VM (host runs Virtualbox 4.2.18, also on openSUSE 13.1) and restarting httpd (Apache/2.4.6) always takes 1.5 minute: foobar:~ # time /etc/init.d/apache2 restart redirecting to ...
1
vote
2answers
22 views

Virtual machine hosting with priority

The simplified problem: I have 3 servers on which I want to host virtual machines. Some VMs are more important than others. Should I keep the important ones on a "high priority" server and the ...
0
votes
0answers
219 views

Windows 8 Hangs at first login ( domain account )

Good morining, i'm experiencing a systematic problem with new fresh joined to domain Virtual Machines with windows 8 and windows 8.1 installed operating system. The issue is that at first login the ...
0
votes
2answers
76 views

Microservers VS Virtual Servers

I am reading this articles in regard to microservers : 10 things you should know about microserver Microservers : What you need to know It seems to conclude that micoservers are best tailored ...
1
vote
3answers
225 views

Why aren't Azure Linux VM's keeping time sync with host?

Using Ubuntu 12.04 VM's built last year on Azure. They only seem to get proper time on boot, and drift about a second a day. Is this a normal issue for Azure VM's? I know VM time drift is normal but ...
1
vote
1answer
88 views

Does 'lvremove' destroy data?

I assign a LV for each vm guest. When deleting a vm, I remove the corresponding lv running 'lvremove'. But is it necessary to destroy the data before running 'lvremove'? Does lvremove do the work of ...
1
vote
1answer
44 views

How should I prepare a Linux virtual machine for others?

I'd like to share a VirtualBox virtual machine with a colleague, but would like to make sure this is tidied up before sending it on. I guess I should include: SSH host keys DHCP leases files under ...
1
vote
0answers
71 views

PHP scripts on live Apache servers consume more memory?

Lately, I've been spending time trying to optimise PHP code. I develop on localhost inside a VM and have been putting the memory_get_usage() at the end of scripts to help do this. The localhost uses ...
-1
votes
1answer
100 views

Forwarding incoming ssh connections to virtual machine based on LDAP group

My Question is as follows: How can I forward all incoming SSH (Port 22) traffic (except one account) to a VM which is running on this server? The Server is based on Proxmox VE 3.1 The VM is Debian 7 ...
0
votes
1answer
148 views

assign public IPs to vm guests

I have a set of public IPs for virtual machines. Each unique public IP is to be assigned to a unique guest. With bridged networking I share eth0 with KVM machines. The ifcfg-eth0 file has ...
1
vote
3answers
560 views

Virtual Machines List from PowerShell vs PowerShell ISE and PowerGUI

I am confused to why I have different information based on where I try to retrieve it from. I have 3 Windows 2012 servers (G0, G1, and G2) running Hyper-V. The following situation is captured from one ...
2
votes
1answer
319 views

Azure Linux VM Captured, Built from image. Different password or key for new VM: permission denied?

I followed How to Capture an Image of a Virtual Machine Running Linux to capture a VM image, after installing the packages I wanted on top of Ubuntu 12.04 LTS. I turned off the machine following a ...
1
vote
1answer
403 views

Restore a VM to latest snapshot automatically on power on?

In vSphere 5.1.0 I have created a snapshot of a windows 7 machine. I would to restore the machine to this snapshot each time its restarted. But it only seems to be possible if I manually go to the ...
1
vote
0answers
29 views

Where do you store shared secrets used in building VMs dynamically (phoenix servers)?

We use vagrant to spin up linux VMs for dev, testing, and evaluation servers for our software. Most often, devs are using linux from VMs inside an AD-connected windows7 box. The configuration of the ...
0
votes
0answers
160 views

Virtual machine can't be reached via SNMP… Is it even possible?

I'm monitoring my work network via SNMP. Now, I have a virtual machine working as a DNS server so that I can access to them using hostnames (I'm using observium in another virtual machine, by the ...
0
votes
2answers
215 views

SSH to VM rejecting password, works from virt-manager console

First of all, I'm sorry if there is a duplicate post somewhere. I searched for a while but none of the posts I found fixed my problem. It's fairly annoying. I created a new VM on our network and when ...
0
votes
2answers
115 views

iptables causes infinite loop of GET request

I am trying to reroute HTTP traffic from 80 to 8080 to be used by Burp Suite. Using iptables, my command was: iptables -t nat -A OUTPUT -p tcp --dport 80 -j DNAT --to 127.0.0.1:8080 By doing so, ...
0
votes
1answer
37 views

Virtual Routing for root virtual machines on 1 IP

I wan't to install several (around 10) virtual machines on our server. We have 1 public IP-address assigned to it. I wan't to use virtualbox (and phpvirtualbox for administration). I have no control ...
2
votes
1answer
208 views

XenServer Linux guest booting off iSCSI SAN (ZFS storage): Will a non-checksumming guest file system still be at risk?

We are storing files on FreeNAS 9.2 using ZFS. I love the data integrity claims made by ZFS, having randomly lost data in the past on servers using ext3, XFS, and ReiserFS that were not mistreated ...
1
vote
0answers
251 views

Can't connect to proftpd from outside the virtual machine

This is related to a previous question. I have a machine with Windows 7 acting as a server and it hosts several virtual machines. One of them, a Debian Squeezy is acting as a PostgreSQL server and I ...
0
votes
1answer
422 views

Resolving External DNS from Azure Virtual Network

I've set up a virtual network in Windows Azure to host two Linux VMs (Centos / OpenLogic). I've registered a local DNS (local as in the cloud, not my personal network) inside the virtual network. I ...
0
votes
2answers
120 views

KVM Network configuration + VLAN trunck

I am trying to set up a KVM Based solution, I am having trouble configuring the NICs for the VMs from a bridge based on a VLAN interface. My config below : ETH0 : KVM Host Management : ...
-1
votes
1answer
74 views

Very Slow SQL Performance on VM rinning 2003 through 2012 r2 host [closed]

I have an OLD HP proliant ML350 used as HYBERv Host (win server 2012 - 16 GB RAM , 3x146 GB SAS , one processor). i have a VM (win-server 2003 32bit + sql server 2000) , every thing is working fine ...
0
votes
1answer
127 views

puppet gitlab postgresql conflict

I#m trying to setup a VM with postgresql and gitlab. I'm using the following packages: gitlab & postgresql This is my init.pp class { 'postgresql::server': ip_mask_deny_postgres_user => ...
2
votes
2answers
1k views

Can I add a second network adapter to my Azure VM?

I have Multiple VM's on Windows Azure. Default, they come with 1 network adapter and you can only assign 1 virtual network (Availability Set) My question is : possible to connect 1 VM to more then 1 ...
2
votes
1answer
418 views

How can I use perfmon/logman to set up logging on a master (Windows) VM, writing to another machine on the network?

I know how to set up logging to write to a remote location in the general case - just specify the output filename using the full UNC path (e.g. \\HOST-PC\directory\logoutput.etl) when creating the log ...
1
vote
2answers
89 views

Why am I only able to connect to my server when generating traffic from it? [SOLVED]

UPDATE - Because of the infrastructure changes from the acquisition, there was an IP address conflict. Once that was identified, the behavior stopped, as traffic could consistently be routed to the ...
0
votes
3answers
2k views

kernel warning in logs: set_rtc_mmss can't update from 0 to 58

I've been seeing a bunch of these log messages Jan 3 00: 58: 57 foo kernel: set_rtc_mmss: can't update from 0 to 58 They occur on CentOS 6.4 VMs running on VMware. I understand it's something to ...
5
votes
1answer
444 views

linux OOM-kill why?

. Greetings, fellow admins. I post in the hope of shedding light on the OOM-kills that haunt one of my company's machines. I cannot decide if they are legit OOMs or not. It's a Centos 6.x with kernel ...
0
votes
1answer
87 views

Correct way to copy vm disk

I have a VM’s disk to copy from one host to another for live migration. I can think of two ways to copy the VM’s disk. Do a snapshot of the Logical Volume in the original host, create a Logical ...
-6
votes
1answer
96 views

Different subnet range of ips are not working - windows server 2012 - virtual machine [closed]

ip , subnet , default gateway The main server is windows server 2012 and main ip is : 198.245.73.82 , 255.255.255.248 , 198.245.73.81 Now i have originally allocated ip range from my server ...
0
votes
1answer
73 views

No IIS Manager on Windows Server 2012 Essentials

I just got Windows Server 2012 Essentials installed on a VM and I would like to set up some web projects in IIS on this VM. But I can't seem to find how to get to it? When I remote to the machine with ...
2
votes
2answers
51 views

Azure : VM interference

In Azure, VMs from different services might be co located on the same physical host. Is there any possibility that one might interfere to the other? In other words, is there a guarantee for isolation ...
1
vote
1answer
246 views

How can I move the data files for a VM to another location?

We have a cluster of 3 x 2008 R2 physical hosts running Hyper-V. How do I safely move the VHD(s) and accompanying XML files, etc, for a specific VM to a new location? I want to keep the VM with the ...
0
votes
1answer
77 views

Strato VM stops connecting via SSH after reboot

I have a virtual machine by strato. After rebooting VM can't access via ssh. Strato has a Recovery Manager which keeps the recovery sytem under /repair. How should I start to debug the issue which ...
3
votes
2answers
164 views

How can I keep important VMs in memory without disabling swap?

VM Host -> Xenon E5-2440 w/ 48G mem... Everything runs CentOS6.5 (2.6.32-431) I have 4 guest VMs running each w/ 2G of memory. Their disk images are local files. The host machine is also running a ...
1
vote
2answers
80 views

Guest OS provide internet access to another Guest through Host-Only adapter

I have a set-up like this: Ubuntu (Host OS) OpenWRT(Guest OS) | Damn Small Linux(Guest OS) OpenWRT is connected to Ubuntu through two interfaces, eth0 via NAT (for internet) and eth1 ...
0
votes
0answers
255 views

Adding existing Host to SCVMM: Error 2912

When trying to add an existing Hyper-V-Host to SCVMM I get the following error: Error (2912) An internal error has occurred trying to contact an agent on the %serverName%. (Unknown error ...
1
vote
1answer
223 views

What could cause an Azure VM to stop responding completely?

I have an Azure Linux VM running MySQL, which has stopped responding for the past 24 hours - ping, SSH, MySQL and everything else timeout when trying to connect to it. Yet the status shows as ...
2
votes
0answers
96 views

xenserver vm routing fails half the time on the same network

I recently switched from openstack (due to complexity) to xenserver at work, I ran into an issue that I can't solve, I can ping the server all the time but the vms part of the time. here is a ...
0
votes
2answers
246 views

Can I change the computer name of a switched off Hyper-V virtual machine without turning it on?

Here's what I see in a typical "system" log of Azure role instances for their initialization sequence (this is for Windows Server 2008 R2, I haven't checked other versions): the VM is turned on, the ...
0
votes
0answers
48 views

OVF/OVA extra files

Can anyone suggest a method to do the following: We need to include an extra file (probably just a small text file with a serial) in an OVF file before we wrap it up into an OVA for deployment. Here ...