Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Sign In Register

Quick Links


BMail.ag - Secure Email Service
Server.net
CPLicense.net
VPS Server
Buy VPN
Vultr
VMs for AI
HostDare
ReliableSite White-Label Dedicated Hosting for Resellers
K.N Cloud — High-Performance KVM VPS in Miami,Frankfurt and Amsterdam
InterServer VPS
BMail.ag - Secure Email Service
Best VPN
High-Performance Bare Metal Server Solutions
Karvl.com
Server Mania Cloud Hosting
DataWagon Hosting
AlphaVPS Hosting
Evoxt.com
Clouvider
VPS Hosting with NVMe
ReliableSite White-Label Dedicated Hosting for Resellers
Rabisu - Hosting Solutions
CloudLinux
MeduzaVPN
Servury - Anonymous & Privacy-focused VPS Hosting
Animated Silicon Kiwi cloud ad featuring VPS from $4.90/month, 100 GB S3 storage from $1.49/month, Kiwi Apps from $12/month and cloud backup from $3/month

Categories

In this Discussion

Home › General
New on LowEndTalk? Please Register and read our Community Rules.

All new Registrations are manually reviewed and approved, so a short delay after registration may occur before your account becomes active.

Can it be done: Xen inside a KVM guest

mpkossenmpkossen Member
edited April 2013 in General

I've been searching around for people having experience with this. I've also tried it myself (but it didn't work). I want to run Xen inside a KVM Guest. Just Xen PV, not HVM, obviously. I could install it just fine but it doesn't complete the boot and seems to hang at completely different points.

Why would I want this? For fun and testing purposes :)

Anyway, the real question is: has anybody done it before? And if yes: how?

Comments

  • erhwegesrgsrerhwegesrgsr Member

    Try Xenner ;-)

  • zhuanyizhuanyi Member

    I am pretty sure I saw @AnothnySmith got this kind of setup up and running before, but not sure the details.

  • Ash_HawkridgeAsh_Hawkridge Member

    OpenVZ and Xen run fine inside KVM :)

  • RalliasRallias Member

    It can be done. You need to enable hardware virtualization passthrough to use HVM. I'm not sure the exact name of the feature.

    You'd probably need a virtual "real" ethernet card. I'm not too keen on it tho.

  • ShardHostSarahShardHostSarah Member

    You'll need to enable nested virtualisation. There are a number of guides for KVM available online.

  • mpkossenmpkossen Member

    @ShardHost said: You'll need to enable nested virtualisation. There are a number of guides for KVM available online.

    Also for just Xen PV?

  • RalliasRallias Member

    @mpkossen said: Also for just Xen PV?

    No. You don't need the virtualization extensions for PV.

  • mpkossenmpkossen Member

    @Rallias said: No. You don't need the virtualization extensions for PV.

    I thought so, so that can't be it then :)

    I'll toy around, see how far I can get. Hopefully somebody else has some experience.

  • mpkossenmpkossen Member

    FACEPALM: doesn't work with VirtIO :)

  • ShardHostSarahShardHostSarah Member

    Sorry missed PV

  • MaouniqueMaounique Host Rep, Veteran

    I tried to boot xen with centos 5 inside a full virtualized machine for Xen-PV with the same results, hanging.
    Debian worked tho. I was using virtualbox and blamed it on that at first, later tried in a proxmox and had the same failure.
    I think it is something centos 5 specific.

  • Mon5t3rMon5t3r Member

    i just running this successfully (but not fully satisfied with the performances) :

    • OVZ inside KVM
    • KVM inside KVM (nested KVM)
    • LXC inside KVM and LXC inside KVM inside KVM
    • HVM/PV inside KVM (but for HVM you still need the nested parameters enabled in your kernel)
  • mpkossenmpkossen Member

    Thanks for the responses, guys! It seems to be running smooth now :) I'm going to test the performance, but I'm glad it works out of the box on Ubuntu (though not with VirtIO).

  • raphaellucianoraphaelluciano Member

    Hi @mpkossen,
    I'm trying to do the same thing (run a Xen VM guest on a KVM fisical host) with no success until now. Both, host and guest, are ubuntu 64bits. When I try to boot the xen guest, I get some error, something like: Code 55 14 f3 33 f5 78 ...

    I couldn't understand what did you do in order to make it work. Can you give a little help on it?

    Thanks in advance.
    Have a good one!

  • angstromangstrom Moderator, Veteran

    @raphaelluciano said:
    Hi @mpkossen,
    I'm trying to do the same thing (run a Xen VM guest on a KVM fisical host) with no success until now. Both, host and guest, are ubuntu 64bits. When I try to boot the xen guest, I get some error, something like: Code 55 14 f3 33 f5 78 ...

    I couldn't understand what did you do in order to make it work. Can you give a little help on it?

    Thanks in advance.
    Have a good one!

    Bravo for the necro.

  • svmosvmo Member

    @Mon5t3r said:
    i just running this successfully (but not fully satisfied with the performances) :

    • OVZ inside KVM
    • KVM inside KVM (nested KVM)
    • LXC inside KVM and LXC inside KVM inside KVM
    • HVM/PV inside KVM (but for HVM you still need the nested parameters enabled in your kernel)

    To add to the list:

    • KVM inside LXD
      (you can take a snapshot of your whole KVM environment and migrate it to a different server)
  • randvegetarandvegeta Member, Host Rep

    what's the performance hit on nest virtualization?

  • WSSWSS Member

    @randvegeta said:
    what's the performance hit on nest virtualization?

    Six.

    Thanked by 2Kris netomx
  • AuroraZAuroraZ Barred

    @randvegeta said:
    what's the performance hit on nest virtualization?

    Not too much if you pass everything straight through.

  • randvegetarandvegeta Member, Host Rep

    WSS said: Six.

    Imposibru!!

  • JanevskiJanevski Member

    @raphaelluciano said:
    something like: Code 55 14 f3 33 f5 78 ...

    image

    Thanked by 1WSS
Sign In or Register to comment.