Most, if not all, modern operating systems set the CPU to sleep mode when they don't need to be used. The problem here is that the VMs are not running a OS but a boot loader and it does not implement this feature so it is using all the CPU cycles doing nothing. In this regard KVM nor OpenNebula can help.
The only tip I can give you is to use cgroups to limit the total amount of CPU a VM can use: http://opennebula.org/documentation:rel4.2:kvmg#working_with_cgroups_optional On Thu, Nov 7, 2013 at 4:38 PM, Daniel Dehennin <daniel.dehen...@baby-gnu.org> wrote: > Hello, > > On our 3.8 dual-node ONE I got this morning a OVERLOADED node with load > average of 35. > > I found one my own VMs eating 99% CPU, it was just booted and waiting > at ISO boot menu prompt. > > It looks to be related to KVM as I reproduce it on a 4.2. > > I can reproduce it by defining a template using an Ubuntu Server AMD64 ISO > and instanciate it. > > I just let the VMs at ISO boot menu, and the KVM process quickly eat 99% > of CPU. > > If someone has an idea. > > Here is the template: > > oneadmin@nebula:~$ onetemplate show 17 > TEMPLATE 17 INFORMATION > ID : 17 > NAME : Install ISO AMD64 20G > USER : eole > GROUP : oneadmin > REGISTER TIME : 10/11 19:29:17 > > PERMISSIONS > OWNER : um- > GROUP : --- > OTHER : --- > > TEMPLATE CONTENTS > CONTEXT=[ > NETWORK="YES", > SSH_PUBLIC_KEY="$USER[SSH_PUBLIC_KEY]" ] > CPU="0.2" > DISK=[ > IMAGE_ID="0" ] > DISK=[ > CACHE="none", > IMAGE_ID="43" ] > FEATURES=[ > ACPI="yes", > PAE="no" ] > GRAPHICS=[ > KEYMAP="fr", > LISTEN="0.0.0.0", > TYPE="VNC" ] > INPUT=[ > BUS="usb", > TYPE="tablet" ] > MEMORY="768" > NIC=[ > MODEL="virtio", > NETWORK_ID="1" ] > OS=[ > ARCH="x86_64", > BOOT="hd" ] > VCPU="2" > > And here the ISO: > > oneadmin@nebula:~$ oneimage show 43 > IMAGE 43 INFORMATION > ID : 43 > NAME : Ubuntu 13.10 server AMD64 > USER : eole > GROUP : oneadmin > DATASTORE : ISO > TYPE : CDROM > REGISTER TIME : 11/07 16:29:06 > PERSISTENT : No > SOURCE : > /var/lib/one//datastores/100/39670c51a99879ca3e221d5fc8027dce > PATH : /var/tmp/thin-body20131107-1782-yqfomp > SIZE : 672M > STATE : used > RUNNING_VMS : 1 > > PERMISSIONS > OWNER : um- > GROUP : --- > OTHER : --- > > IMAGE TEMPLATE > DEV_PREFIX="hd" > DRIVER="raw" > > VIRTUAL MACHINES > > ID USER GROUP NAME STAT UCPU UMEM HOST TIME > 117 eole oneadmin userver-test runn 99 768M nebula 0d > 00h06 > > Regards. > > -- > Daniel Dehennin > Récupérer ma clef GPG: > gpg --keyserver pgp.mit.edu --recv-keys 0x7A6FE2DF > > _______________________________________________ > Users mailing list > Users@lists.opennebula.org > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org > -- Javier Fontán Muiños Developer OpenNebula - The Open Source Toolkit for Data Center Virtualization www.OpenNebula.org | @OpenNebula | github.com/jfontan _______________________________________________ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
