[one-users] KVM process at 99% CPU

[Daniel Dehennin]

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 at 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 at 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
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