Tagged Questions

1
vote
0answers
174 views

Ubuntu 10.04 kvm Virtual Machine guest network speed slow

i have the following situation, i have a kvm host ubuntu 10.04 LTS 64-bit network host speed is perfectly run , as i am testing network speed using iperf , the speed between any network device and the ...
4
votes
3answers
542 views

Host CPU does not scale frequency when KVM guest needs it

I have asked this question on serverfault, but it could also have been posted here. I will synchronise the answers if one is found. Observation: I have an HP server with an AMD dual core CPU (Turion ...
4
votes
3answers
116 views

What is contained in these addresses?

I am working on MUlti-processor record-replay feature of a virtual machine. I have a log of non-deterministic memory access done in the virtual machine by virtual CPUs. A very high proportion of these ...
3
votes
2answers
85 views

How long could I work with stable release after it is no more supported?

I'm still working on Debian squeeze which will be supported for only about 1 more year (it is server with KVM). How long is it possible to work on an old version of Debian (after Debian gets old) when ...
1
vote
1answer
377 views

How to limit CPU performance for KVM VM?

imagine 1 Virtual machine with 2 shared cores on quad core CPU 2Ghz speed. Is it possible to limit this Virtual Machine for 500Mhz of CPU power on both cores? Or to reserve 1Ghz on 1 core for this ...
0
votes
2answers
1k views

KVM - Which Web Based management to use?

I would like to became an Expert of managing KVM on debian squeeze. I still use virt-manager. Yes, it is easy and quiet safe and quick for me. I tried a lot of web based management UI and non of ...
3
votes
2answers
97 views

How to report back system installation progress

I'd like to do some reporting from the system setup progress for virtualised (libvirt/kvm) Ubuntu servers. I expected some kind of such system to already exist out there, but couldn't find anything. ...
2
votes
0answers
180 views

How to setup KVM partitions?

I'm trying to install SolusVM/KVM on a server with one 500 GB HD and one 256 SSD. I am a complete beginner at Linux. SolusVM has a script on the site to download and install automatically, but how do ...
1
vote
1answer
1k views

What is the difference between virbr# and vnet#?

I am running KVM on RHEL6, and I have created several virtual machines in it. Issuing ifconfig command to the host system command line shows a list of virbr0, virbr1... and vnet0, vnet2... Are they ...
3
votes
0answers
98 views

Socksifying a qemu-kvm using tsocks

I'm trying to socksify a qemu-kvm using tsocks, but I have no success. I don't know if qemu access directly the hardware, skipping the OS or something like that, but I wasn't able to do this feat. ...
1
vote
1answer
911 views

Bridging ethernet interface

I have a server with 4 public IP's. I have it with this configuration and I want to bridge the interface eth0 for using it with KVM: So, I have 3 IP's (A.B.C.144, A.B.C.145, A.B.C.146) and another ...
2
votes
1answer
177 views

KVM: network partially lost for the host, guests are fine

I got KVM working fine on a Linux system, for quite some weeks. Then today something weird happened: suddenly the host (and the host only) lost some of its Internet access: it can still access the ...
3
votes
1answer
4k views

How to install KVM on CentOS 6

I can't install kvm on CentOS. I got these errors: [root@localhost etc]# yum groupinstall kvm -y Loaded plugins: fastestmirror, presto Loading mirror speeds from cached hostfile * base: ...
5
votes
1answer
1k views

Linux - LXC; deploying images with tiniest possible X11

is it currently possible to setup LXC containers with X11 capabilities? I'm looking forward for the lightest available X11 container (memory-wise), hardware acceleration a plus but not essential. If ...
11
votes
2answers
720 views

Weight-based block IO control for VMs

I use KVM to manage my virtual machines. I am trying to limit the resources provided for VMs. I am able to limit the CPU and memory allocated for VMs using libvirt/cgroups. Now I want to control the ...
5
votes
1answer
357 views

Linux process scheduling - Cap/Weight based?

I am just trying to understand the basics of Linux scheduler. Is Linux scheduler a Cap based or weight based scheduler? I was previously using Xen. Now I am moving from Xen to KVM. I read VMs are ...
2
votes
1answer
378 views

KVM with directory rootfs

I'm currently working on an embedded system design and my test development machine is currently a VM running in KVM. Is it possible to have KVM mount a directory (like a chroot) and use that as the ...
1
vote
3answers
3k views

How to create a dupe of a KVM/libvirt/virt-manager VM?

I'm a bit lost with virt-manager / libvirt / KVM. I've got a working KVM VM (Windows XP) which works nicely. The VM is backed by a 4GB file or so (a .img). Now I want to do something very simple: I ...
5
votes
2answers
614 views

Good tutorial for setting up a KVM/Xen box and advice on which would be better

I've got a dual xeon, 2GB, 75GB hd server that I'd like to turn into my dedicated virtual environment. Currently I'm using VirtualBox locally to run a mock cluster for Cassandra and Nginx/Haproxy, ...
6
votes
3answers
3k views

How do I connect a serial terminal to a KVM instance?

Perhaps I'm misunderstanding what KVM is capable of, but the ability to add/remove hardware on the VM seems to imply I can add a serial port that then acts as a terminal. So, my questions are: ...