Hot answers tagged linux-kvm
9
Add CDROM:
attach-disk guest01 /root/disc1.iso hdc --driver file --type cdrom
--mode readonly
Change CDROM:
attach-disk guest01 /root/disc2.iso hdc --driver file --type cdrom
--mode readonly
Remove CDROM:
attach-disk guest01 " " hdc --driver file --type cdrom
--mode readonly
6
What's wrong with VirtualBox OSE then? I have it running on an LXDE system, and it's possible to run it completely headless. It will run Windows, it's relatively lightweight, great performance, and it's open source. KVM might be better when you have lots of VMs to run, but if you're used to using VMWare Workstation, VirtualBox will be the easiest thing ...
5
For testing and virtualized XP for daily use I recommend VirtualBox. It's free and has all the necessary features to run desktop OS's. It is also cross platform which means you can move your virtual machines around.
For server type scenarios and always on machines I would use VMWare Server. It makes the management of machines simpler and easier.
5
How much memory have you allocated to each instance? IIRC, Some VM's allocate exactly the amount you set for each VM, so with only 2GB of ram you are probably swapping a whole lot, causing performance issues. The obvious fix would be to get more than 2GB of ram, because low amounts of ram in addition to a slow CPU cause major performance issues.
3
Fast and dirty example for KVM on Centos 63 x86_64. Short ping in background to all possible IP addresses that the VMs may have in this segment
for i in {1..249}
do
ping -c 1 -n -q -r -t 1 -s 1 -W 1 192.168.100.$i > /dev/null &
done
Extract the names and MAC addresses of the VMs via virsh and extract IP from ARP table
for name in `virsh ...
3
I don't have any experience with KVM myself, but for VirtualBox, VMWare and Parallels this will work.
It takes several reboots of the W7 VM to recognize the new (virtual) hardware and you will have to install the Guest Additons/VMWare Tools/device drivers, whatever your virtualization software calls it.
Be warned that switching back to using the partition ...
2
I have a fair bit of experience switching between booting a Windows partition natively and running it as a VM. First of all, hardware and driver support were NOT an issue for me, nor was it necessary to uninstall VMware Tools when booting in a physical context.
That aside, it sounds like a great idea, but product activation is where it really falls down. ...
2
I think this is an easy setup, but that might just be me.
I would install the VMWare Hypervisor on all of the nodes, then on a Windows Server 2008 machine, install the VMWare VSphere Server, and optionally, on the same (or different) server, install the VMware VSphere client (which is what you will manage everything from). Have the nodes setup for HA (high ...
2
Your existing Windows XP partition was installed assuming certain things about your hardware (your particular motherboard, CPU, chipset, etc.).
When you boot that partition inside a virtual machine, Windows sees a radically different set of hardware. Windows' installed configuration is unlikely to match the virtual hardware that KVM is presenting it, and ...
2
Unfortunately I believe you have to buy a fully licensed copy, even for a virtual machine. I know you can install it in a vm though, as said in the EULA:
Instead of using the software directly
on the licensed device, you may
install and use the software within
only one virtual (or otherwise
emulated) hardware system on the
licensed device.
2
I believe all Windows 7 versions can be installed in virtual machines.
However, there are many limitations of what you're allowed, many more so on server versions than on workstation. If you don't care about the version, and just want one virtual machine, just search for the cheapest offer.
For example, if you have a college email address you may get ...
2
This probably depends on your ISP and what type of connection you have, but if you don't have an IP configured, you are probably pretty safe. If your ISP happens to allow other protocols down the wire (most don't), then you might be vulnerable through one of them, if it were configured.
EDIT: To answer the question in the comments, I believe ifconfig will ...
2
After long hours of getting my hands dirty, I chanced to stumble upon this Epic link.
Get the MAC address of the VM from the config file of the VM(since
I'm using KVM, I queried the .xml file for the MAC address).
Then use arp -a and get all the the MAC addresses and the Address of the interfaces and store it in a file
Query the file for the MAC address ...
2
Also in my case (Fedora 16 32 bits) I've installed everything ...also I've activated bios visualization vt-x... cpu is compatible .. but the same error (KVM is not available. This may mean the KVM package is not installed,or the KVM kernel modules are not loaded. Your virtual machines may perform poorly.)
Finaly I've executed manualy modprobe kvm_intel and ...
1
You have a couple of different options to get USB into KVM. KVM does allow for you to map a USB port into the VM. There is a basic tutorial here. You will need to try this out, I have never had much success for non hard drives keyboards and mice.
Your other solution is using usb over ethernet. You install a driver on another machine (server) where you ...
1
In libvirt 0.9.12 and maybe earlier, a command change-media exists:
change-media <domain> <path> [<source>] [--eject] [--insert] [--update] [--current] [--live] [--config] [--force]
Change CD:
change-media guest01 hdb /pool/disc.iso
Eject CD:
change-media guest01 hdb --eject
1
If you don't mind using ubuntu 10.10 (without all the LTS glory), here's quite a nice guide to run kvm on ubuntu 10.10:
http://www.howtoforge.com/virtualization-with-kvm-on-ubuntu-10.10
actually i think if you have already paid for it, vmware workstation is an excellent product. Virtualbox however provides an excellent alternative and had some advantages ...
1
Or VMWare Player, which is not open source but it is free. It does almost everything you can do with Player. I use it on Windows. In a previous job I used Workstation every day. Now in the new job I use Player. I really don't notice any great difference. As far as performance goes they seem identical.
1
Ubuntu and Debian use Upstart as a replacement for init, but legacy init scripts are supported. Chances are that you can add the option in a script in /etc/init.d with the same name as the service. Also look in /etc/init for .conf files that control the runlevels that services are started and stopped on and how they're respawned, etc.
1
I have similar problems with linux kernel 2.6.25.20, I tried to break on start_kernel and panic, but it does not work, but if I run it, and quickly ctrl-c gdb, then I can successfully break at the breakpoint, it magically worked. I don't know why... maybe it's section entry problems. or maybe it's qemu version problem... whatever. but it works for the ...
1
to answer to my own question. I just found out that Windows 7 x86 guest in kvm with -soundhw ac97 can have sound. I guess we really do not have a driver for that kvm virtual audio device in Windows 7 amd64. so, I think this is as far as I can go. Windows 7 amd64 guest in kvm is DEAF...
1
This is wrong. It is possible to boot native and from VM.
Take e look at "HOWTO: Windows XP in both VM and native" or KVM related you cold it do like described on "Booting Windows XP from raw disk with Linux KVM".
1
I use VMware Server 2.0 for my software testing environment, where I run virtual machines of ubuntu, debian, suse, centos, fedora, opensolaris, freebsd, openbsd, windows xp/vista/7 concurrently.
I like the snapshot feature, as I can create a baseline installation, snapshot it, then doing testing, and reset it back to where I was.
Until this bug and this ...
1
I remember problems with VMWare on ubuntu. The new version has client not as standalone application, but as plugin to firefox - it didn't work for me. VirtualBox on the other hand is very easy and seems "nicer". VMWare however has ability of managing virtual machines by network (firefox), while VirtualBox you can manage only from machine it is running on.
1
For a nice fully open source and robust solution I would recommend the Xen Cloud Platform + CloudStack.
http://xen.org/products/cloudxen.html
http://cloudstack.org/
http://cloudstack.org/blog/xcp-support-coming-to-cloudstack-in-the-next-release.html
1
If I recall correctly, serial ports don't have a standard means of detecting whether there is a terminal connected to the other side – or if they do, most virtual serial consoles simply don't bother implementing them. Hence the agetty instance for ttyS0 is started when the guest boots, and the login banner is simply sent to nowhere (to a disconnected ...
1
try following:
sudo yum groupinstall Virtualization
sudo yum groupinstall Virtualization Platform
sudo yum groupinstall Virtualization Client
sudo yum groupinstall Virtualization Tools
make sure to reboot after that installation is complete
you can check service is started by issuing following command (it should return service is started)
service ...
1
There are more packages required than just qemu-kvm.
This will get you what you need.
yum groupinstall Virtualization
Edit:
To answer your question about your CPU and virtualization, run
$ egrep '^flags.*(vmx|svm)' /proc/cpuinfo
If NOTHING is printed, your system does not support the relevant extensions. You can still use the QEMU/KVM, but the ...
1
If you are using this with a desktop environment, I would recommend doubling the ram, and make sure the guest has access to all cores.
And definitely add swap so it can make more efficient use of ram. There is free physical, but by the look of it the next tab would hit the limit, leaving no room for caching, which will lead to slowdowns.
It depends on ...
1
I asked this question on IRC and it appears that macvtap
injects guest traffic into the network stack too low for that
The solution is then to add a network interface for the guest and the host to communicate, or stay with the old bridged solution...
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