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• Difference between VMWare tools?

  - by tore-

  I'm currently writing a module for puppet which installs VMWare tools to virtual nodes. I want to do this via yum and and yum-repo. VMWare have their own repo (http://packages.vmware.com/tools/esx/3.5latest/rhel5/x86_64/index.html) which I thought I could use, rather than creating my own. But then I noticed that their repo files is alot different than the rpm file used when installing VMWare Tools on the node, via the "Install/upgrade VMWare Tools" in vSphere. Does anyone know what the real difference is? Does anyone have any preferences?

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• Vserver still interesting ?

  - by Kartoch

  I was using Vserver a long time ago. But since the last stable release (2007), BSD jails are offering many more functionalities. It is not clear if Vserver has still a future (still some development on it). have you dump (ou keep) vserver for your production servers ? For which reasons ?

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• Microsoft VirtualPC Networking Issue

  - by Joda Maki

  I am using Microsoft VPC running the supplied microsoft images to test IE6/7. The ip addresses that get assigned to these images are via dhcp and get valid ip addresses in my subnet. They can access the external internet just fine. However, they cannot ping my host machine, nor can my host machine ping them (using internal ip addresses). Thus, they can't access my webserver to test with. How is this possible and how do I fix it?

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• installing kvm on centos 6.2 getting error: virsh sysinfo error: failed to get sysinfo

  - by Grant

  # virsh sysinfo error: failed to get sysinfo error: unsupported configuration: Host SMBIOS information is not available # virsh -c qemu:///system sysinfo error: failed to get sysinfo error: unsupported configuration: Host SMBIOS information is not available Following this tutorial to the letter: http://eduardo-lago.blogspot.com/2012/01/how-to-install-kvm-and-libvirt-on.html Everything else works fine except this command: virsh sysinfo outputs error. Help!

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• Bridge and OpenVPN with shorewall

  - by Javier Martinez

  I have this scenario and everything it's working OK, but I want to configure my Shorewall and I can't do it. My interfaces are: br0 (bridge of eth0) tun0 (OpenVPN) vnet* (each one of bridged interfaces with public IP's) Public Main IP: 188.165.X.Y OpenVPN IP's: 172.28.0.x Bridge: public ip's So, I have the next configuration for shorewall: /etc/shorewall/zones #ZONE TYPE OPTIONS IN OUT # OPTIONS OPTIONS fw firewall inet ipv4 road ipv4 /etc/shorewall/interfaces #ZONE INTERFACE BROADCAST OPTIONS inet br0 detect routeback road tun+ detect routeback /etc/shorewall/policy #SOURCE DEST POLICY LOG LIMIT: CONNLIMIT: # LEVEL BURST MASK $FW all ACCEPT inet $FW DROP info road all DROP inet road DROP /etc/shorewall/tunnels #TYPE ZONE GATEWAY GATEWAY # ZONE openvpnserver:1194 inet 0.0.0.0/0 The problem is that even with shorewall running I am able to ping or connect to the virtual machines behind the bridge

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• P4 vs. i3/i5 *T in power consumption and performance [migrated]

  - by Walter Zomb

  I am running an Intel P4 prescott with HT on my home server (linux file server on encrypted disks on software-RAID5 and virtualisation host for three further machines). The performance for this purpose is really okay. When the system is idle it consumes about 140W power. I am considering buying a new mainboard for an e.g. Intel i3-2100T or an Intel i5-2390T. Both are low power CPUs with a TDP about 40W. Has anyone experiences how much power a recent mainboard with one of these CPUs an 3-4 'green-energy' disks (6W each) consumes? Do I get underneath the 100W threshold? What's about the performance of these low power CPUs? Are they comparable to an Intel P4 with HT? regards, walter

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• Windows 7 x64 Boot Camp Partition, Snow Leopard on MBP, and VMWare Fusion 2.x/3 - Endless Repair Sta

  - by Keith Fitzgerald

  Thanks in advance for your help! As the title states, I have Windows 7 x64 Boot Camp Partition, Snow Leopard on MBP, and VMWare Fusion 2.x/3.x. I'm trying to open the partition as a vm and I get into an endless cycle where windows tries to Repair Start Up disk for a very long time before failing. The boot camp partition runs fine natively. Has anyone experienced this? Can someone provide or link a remedy? My google fu is failing miserably ....

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• What is the best way/Software to manage multiple short lived instances of virtual machines ?

  - by Newtopian

  Hi, We have a QA department that have to test our software on multiple combination of OS and DMBS. With Windows spewing out many different versions the combinatorial math of all this can be daunting. So we decided on visualizing our setups but so far it only displaces the problem. The cost of hardware is expensive and we need many different combination far exceeding your server capacity to deliver. Also, these instances are throw away, once the test is complete we no longer need it, furthermore to ensure proper test isolation we should start fresh from a new instance. Lastly we only need a small subset of these system online at any given time. What I am looking for is a way to manage inventory so that our QA staff can order instances to be put online as required and discarded once used. Instances are spawned from a pool of freshly installed systems with the appropriate combination ready to accept our software. It also should be possible for two or more people to start the same instance at the same time, though we could manage without this if it proves too complex to put in place. Finally our budget is pretty thin, we can probably make some purchases but ideally expenditures should be kept to a minimum. To summarize we should be able to : Bring instances online on demand. Ideally should offer queue and scheduling management Destroy instances on demand Keep masters in inventory but not online. Manage large inventory of VMs (30-100 maybe more) with small staff of users (5-10). Allow adding, deleting and changing instances from inventory (bring online, make changes and check back in, or create new and check in). Allow few long lived instances for support tools (normal VM server usage) Thanks for your answers

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• Virtual machines with failover setup

  - by kimmmo

  We have three servers and our plan is to run a number of virtual machines on them in such manner, that if one of the nodes blow up, we can either quickly or seamlessly get a spare running on another node. In addition to the normal networking, they're interconnected via dual 10Gbit NIC's, so networked raid/mirroring shouldn't be a problem. The guest VM's are mostly going to be running text mode linux, but of course it wouldn't hurt to be able to spin up a non-mission critical windows guest for running Visual Studio or checking IE compatibility of a web app. We've spent some time trying to get some magical cloud setup running using Stackops and Crowbar but it started to look like they were offering way too much and were too complicated for our needs. The next candidate, I think, is Ubuntu 11.04 server + KVM + Ganeti + Drbd, unless you can come up with a suggestion for a better solution that we have missed. Requirements: Installation should be simple or at least understandable without being in the dev team A browser interface for creating and managing VM's is a nice bonus Single node's hardware failure should cause minimal downtime for VM's that were running on that node Adding more nodes should be possible without shutting down the VM's.

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• How to set path of Virtual PC hard disk differencing parent

  - by Barry Kelly

  I have an old Windows XP Mode vhd backed up from my previous system, but I'm having difficulty getting it running on the new system. The vhd is a differencing disk, and its parent is the standard Windows XP Mode base; I still have the old parent, and have verified it is binary identical to the XP Mode base in my new installation of XP Mode. But in the new system, the path to the differencing disk parent is different than the old. When I open up the settings for the .vmcx for my old XP mode, and select "Hard Disk 1", the "Virtual hard disk file" is set correctly, but the "Parent Disk:" field is pointing at the wrong path, and I can't see any way to edit it. Does anyone know how?

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• How does it hurt to use Linux (Ubuntu) as a guest OS for all my tasks?

  - by sauparna

  I have a machine running Windows, where the disk has two partitions C (50 GB) and D (250GB). I do research in Information Retrieval and need to work with a large corpus (more than 50 GB) and in Linux. So if I want to install Linux on the existing system, keeping the Windows installation intact, will it be fine to run it in a virtual box? (say, QEMU, VMWare, etc.) An alternative is using Wubi. In that case the Linux installation has to be on drive C. Then, if I keep a small Linux installation (say 5GB) on C, and my corpus on D (mounted in Linux), how will it affect the performance of my programs which would be accessing the mounted Windows drive D. Is it feasible to use Linux this way? Which of the above is better if at all they are a way out? Note : Since my post in July 2010, I have been using and have tried several ways of maintaining a disk-image that I can mount in Linux. I had a 100GB qcow2 disk and a 100GB raw disk, both formatted to an EXT3 file system. I was mounting and connecting to the qcow2 disk using qemu-nbd. The problem was that every now and then, the connection to the disk would get lost and the running programs would throw disk I/O errors. The raw disk would mount and work fine as a loop mounted device, but when writing data to it, the mount.ntfs program would hog the CPU and the process would take an enormous amount of time. I was in fact running make on a piece of software located on this raw disk, and after a point of time make was waiting while mount.ntfs would show 100% CPU usage.

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• Ubuntu with KVM guest VM and broken bridges

  - by MadPsy

  I have an Ubuntu box with a KVM guest VM running. They use bridging so the guest VM attaches to the physical network of its host. The guest VM has 2 NICs in 2 different bridges. First NIC of the VM is tap5 and is in bridge br0 br0 8000.46720f5c572e no eth0.500 tap5 Second NIC of the VM is tap2 and is in bridge br100 br100 8000.76ad2fc96661 no eth0.100 eth0.101 eth0.103 eth0.104 eth0.105 tap2 On the host, br0 has an IP and br100 does not 21: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP link/ether 46:72:0f:5c:57:2e brd ff:ff:ff:ff:ff:ff inet 192.168.100.4/24 brd 192.168.10.255 scope global br0 inet6 fe80::d6ae:52ff:febe:777/64 scope link valid_lft forever preferred_lft forever On the guest, its eth0 and eth1 interfaces both have IP addresses 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:3e:61:fb:7a:da brd ff:ff:ff:ff:ff:ff inet 192.168.100.6/24 brd 192.168.100.255 scope global eth0 inet6 fe80::23e:61ff:fefb:7ada/64 scope link valid_lft forever preferred_lft forever 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:3e:61:fb:7a:ea brd ff:ff:ff:ff:ff:ff inet 172.16.50.129/25 brd 172.16.50.255 scope global eth1 inet6 fe80::23e:61ff:fefb:7aea/64 scope link valid_lft forever preferred_lft forever On the guest VM, a tcpdump of its eth1 interface (tap2) shows traffic from its eth0 interface (tap5), as if the 2 bridges are themselves bridged. This means any interface on br100 is now bridged across to br0 - which is completely broken. root@chillispot:~# tcpdump -c 1 -n -v -i eth1 net 192.168.100.0/24 tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 16:31:24.175583 IP (tos 0x0, ttl 64, id 48054, offset 0, flags [DF], proto TCP (6), length 148) 192.168.100.6.22 > 192.168.100.4.59505: Flags [P.], cksum 0x6c2b (correct), seq 1056321648:1056321744, ack 398642983, win 1700, options [nop,nop,TS val 197473436 ecr 200655363], length 96 What could be bridging the 2 bridges, except the guest VM (which is a stock Ubuntu install)? I am at a complete loss! Thanks.

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• How to extend a Linux PV partition online after virtual disk growth

  - by Yves Martin

  VMware allows to extend the size of a virtual disk online - when the VM is running. The next expected steps for Linux system are: extend the partition: delete and create a larger one with fdisk extend the PV size with pvresize use free extents for lvresize operations and then resize2fs for file system But I am stuck on the first step: fdisk and sfdisk still display the old size for the disk. My disk is a SCSI virtual disk connected thanks to the virtual LSI Logic controller. How to refresh the virtual disk size and partition table information available in Linux kernel without reboot ? As far as I know all that steps are possible for a running Windows, without reboot and even without any user actions thanks to VMWare tools. On Linux, I expects to do all steps online too and I already know steps 2, 3 and 4 work online. But the first one - change partition size declared in the partition table (still) seems to require a reboot. Update: My system is a Debian Lenny with kernel 2.6.26 and the disk I have extended is the main disk with a large PV containing the "root" LV for "/".

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• Qemu not installed on ubuntu with xen 4.0.1 ?

  - by Disco

  I'm kinda confused. I've installed Xen on a fresh/clean ubuntu 10.10 server (x64) using : hg clone xen-4.0-testing.hg make world make install-kernels Trying to launch qemu; first "not found" Then I installed from source (from tarballs at qemu.org) But then qemu complains about not finding /dev/kvm Am I missing something here ? I thought that qemu was part of xen install (at least it was from 3.x series). All i have is qemu-img-xen and qemu-nbd-xen.

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• emulate fake monitor on windows 7?

  - by Claudiu

  Is there any way to emulate a monitor on Windows 7? I have one physical monitor, and I want Windows to think I have two. I actually don't care whether the second monitor is visible anywhere, or if I can see it - everything rendered there may as well go to the equivalent of /dev/null - but I need Windows to think there is one there. The reason is that I want to run a virtual machine with two monitors with VirtualBox in seamless mode, and it doesn't let me go to seamless mode if there are more virtual monitors than physical ones. I don't need to see the second virtual monitor, but VirtualBox won't just stop displaying it like it did in earlier versions.

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• Windows 7 XP Mode, Resizing triggering lock

  - by greggorob64

  I'm a developer using Windows 7 XP Mode to get some old 16-bit apps to run. A hugely annoying hurtle I'm encountering is this: When I resize my XP windows at all (usually by mistake), it automatically logs me off (or Locks), requiring me to log in. This causes my build batch file to stop, which is potentially hours of work lost. Any help would be appreciated, thanks.

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• What is the most suitable way to manage iSCSI storage for Virtual Environments?

  - by Gabriel Talavera

  We are planning to place a HP MSA P2000 with two FC/iSCSI controllers in our network. We have two options to provide more storage to Virtual Machines (We are running Hyper-V): A) Add iSCSI targets to the Virtual Hosts and then create VHD that we would add to each guest server. B) Directly add iSCSI targets in each guest server. Just wondering if one of those options is better than the other, and which is the common practice in a virtualized environment. Thanks in advance for any input!

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• How to test KVM guest CPU maximum allocation limit?

  - by Ace

  Running Ubuntu 13.04 Host and vm Guest. Using virtio for hdd, nic. Max-allocaion CPU cores is 6, minimum is 2. Ive made a vm with virt-manager just to play with, and to test out kvm. Alright, I have a decent understand how the memory balloon driver works, but I still dont know how to test if the guest OS can utilize the max setting for cpu cores. From what i gather, the host will start one thread of qemu for each core allocated per vm. When i run htop inside the guest, it only shows two cores. (also here is the output of cat /proc/cpuinfo: https://gist.github.com/anonymous/93a361545130923537da ) How can I "force" the guest to allocate the other 4 cores so that it can show 6 cores in htop? Is there a way to do this?

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• OpenVSwitch and Virtualbox configuration

  - by Newbie

  I am trying to setup a lab network with OpenVSwitch (Virtual L3 Switch). I want to connect my 3 Virtualbox guest machines (running Debian 6) using OpenVSwitch. But, confused as what should I do first and how should I do this. I mean should I install OpenVSwitch on my VM or on my host machine? If I install on my host machine, then should I make to connect to my VMs. OR If I install OpenVSwitch on one of my VM, then how to connect the rest of the VMs to virtual switch. I know, there is option to connect internal networks in virtualbox, but I a want L3 switch to interconnect my VLANs. Can someone guide me here. Please & Thank you.

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• Zero'ing out deleted files

  - by Bozojoe

  I want to minimize the amount of space my virtual disk is using, by zero'ing out the data on any deleted files. The virtual disk is a VDMK running ubuntu on VirtualBox. What is the best way to find any deleted files, and zero them out, so that when I export the appliance the disk size is only existing files on the disk?

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• non-GUI connection to local Hyper-V VM without network

  - by sandro

  I have a virtual machine on Hyper-V manager (Windows 2008 R2) without a network configured on the VM. From a powershell script running on the host Windows server, I would like to query into the OS of that local VM for certain information (i.e. if a given process has finished completion). I am using codeplex's pshyperv module (https://pshyperv.codeplex.com/) to interact with Hyper-V manager, but the only cmdlet to connect to the vm is 'New-VMConnectSession', which launches a 'vmconnect.exe' connection to the VM. Since vmconnect.exe is essentially RDP, this is not very script-friendly. From within a host's powershell script, is there any way to send a command to a local virtual machine's OS and receive output, if no network is configured on the VM? (I believe Vmware's 'vmrun' utility has this capability) Another way to ask this question: Does Hyper-V have a non-GUI-based form of vmconnect.exe? (PS. Not sure if this was more stackoverflow or serverfault)

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• Sun Virtualbox: Cannot Install Windows 95 or 98

  - by c00lryguy

  I'm running XP and I've tried to install Windows 95 and 98 with the official CDs in Virtualbox. Both of them give the error: FATAL: no bootable medium found! System Halted I've mounted the CD drives within Virtualbox and also tried to change the boot order so that the CD drive is first but to no avail. I don't understand exactly what's going on here.

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• virtual machines and cryptography

  - by Unknown

  I suspect I'm a bit offtopic with the site mission, but it seems me more fitting for the question than stackoverflow i'm in preparing to create a vm with sensible data (personal use, it will be a web+mail+... appliance of sorts), i'd like to protect the data even with cryptography; the final choice have to be cross-platform for the host basically, I have to choose between guest system-level cryptography (say, dm-crypt or similar) or host level cryptography with truecrypt. do you think that the "truecrypt-volume contained virtualized disks" approach will hit the i/o performance of the vm badly (and therefore dm-crypt like approaches into the vm would be better), or is it doable? I'd like to protect all the guest data, not only my personal data, to be able to suspend the vm freely without worrying for the swap partition, etc

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

  - by larsks

  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 # The behavior is very odd; specifying an interface by names yields neither the expected output nor an error message. This is true even for clearly invalid interface names, like this: # ifconfig foo # The ip command exhibits the same behavior. On the other hand, if I use "ifconfig" provided by busybox, everything works as expected: # busybox ifconfig -a eth0 Link encap:Ethernet HWaddr 52:54:00:E0:12:C8 inet6 addr: fe80::5054:ff:fee0:12c8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:268 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:17814 (17.3 KiB) TX bytes:552 (552.0 B) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) So...what does busybox know that the native tools don't? The libvirt config for this environment is pretty standard; the network definition looks like this: <interface type='network'> <mac address='52:54:00:e0:12:c8'/> <source network='default'/> <target dev='veth0'/> </interface> The full configuration is here if you think it might help. I'm running: lxc-0.7.2-2.el6.x86_64 kernel-2.6.32-71.29.1.el6.x86_64 EDIT Weirder and weirder...it's a display issue, not a functionality issue. I can see the output of ifconfig if I pipe it into anything, so for example: # ifconfig eth0 | cat eth0 Link encap:Ethernet HWaddr 52:54:00:E0:12:C8 inet addr:192.168.10.10 Bcast:192.168.10.255 Mask:255.255.255.0 inet6 addr: fe80::5054:ff:fee0:12c8/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:573 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:37914 (37.0 KiB) TX bytes:552 (552.0 b) And in fact even when not piping the output, strace shows that ifconfig is in fact writing the output to file descriptor 1 (aka stdout), so it's not clear why no output is actually showing up. This could be either an LXC or a virsh issue, I guess.

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• Does shutdown idle VMs improve the performance?

  - by Samselvaprabu

  Often our team members are coming to me with a compliant that their VMs are slow. Our team members suggested to shutdown some of the VMs temporarily and try to access the VM. But most cases that would not help. Assume that i have assigned 4 GB for and 2 CPUs for my VM. So ideally it should not face performance issue. As our ESXi 4.1 server has multiple VM in the same server (we have overcommited memory and CPU). Does shut down other VM really helps to improve performance or not? [Note : We are using ESXi 4.1 and our hardware is R710 server. We have more number of VMs in single server so we have overcommited memory.]

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