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Future of OpenVZ?

Future of OpenVZ?

Posted Jul 24, 2012 23:33 UTC (Tue) by dskoll (subscriber, #1630)
Parent article: CRtools 0.1 released

I hope this bodes well for the future of OpenVZ. We have a number of OpenVZ machines running on Debian hosts. Unfortunately, it looks like Debian is phasing out OpenVZ in favor of LXC. I've only played with LXC a little, but the user-space tools are nowhere near as good as OpenVZ and unless you're careful, you don't get as good guest/host isolation.

So... what's the word? Does OpenVZ have a future or are we doomed to LXC?


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Future of OpenVZ?

Posted Jul 25, 2012 12:09 UTC (Wed) by Lennie (guest, #49641) [Link]

I think the goal is to get as much of OpenVZ in the mainline Linux kernel, that should reduce the effort the OpenVZ developers have to do to maintain it.

If only because the OpenVZ developers can use part of the in-kernel functions LXC also uses, this will reduce the OpenVZ code base.

If that means that the OpenVZ user-space tools will end up just as a wrapper around LXC-API for compatibility or easier management, because LXC can do everything OpenVZ can do, I don't know.

Future of OpenVZ?

Posted Jul 25, 2012 12:49 UTC (Wed) by dskoll (subscriber, #1630) [Link]

OK. I guess I should go post on a Debian forum... AFAIK, they're dropping OpenVZ support for Wheezy. At the same time, LXC is nowhere near ready for production use, so... ouch.

Future of OpenVZ?

Posted Jul 25, 2012 16:43 UTC (Wed) by drag (subscriber, #31333) [Link]

I believe the OpenVZ developers are involved in LXC in some manner.

Something like LXC is the bits that the OpenVZ people have been able to merge. Or something like that. A 'vanilla' version of OpenVZ so-to-say.

I am not sure about this as it's been a while since I looked into it.

Future of OpenVZ?

Posted Jul 26, 2012 3:17 UTC (Thu) by BenHutchings (subscriber, #37955) [Link]

That's right, OpenVZ will not be in wheezy. The Debian kernel team generally tries to avoid adding features without upstream support, and the OpenVZ project has not had the resources to support stable kernel branches other than one based on RHEL (I think bug #655385 illustrates the problem - and note that the fix for that is pending!). I would expect that OpenVZ's own kernel packages based on RHEL will be usable with a squeeze or wheezy userland.

Future of OpenVZ?

Posted Aug 1, 2012 1:01 UTC (Wed) by lurdan (subscriber, #77641) [Link]

> I would expect that OpenVZ's own kernel packages based on RHEL will be usable with a squeeze or wheezy userland.

This is exactly what proxmox ve does. (http://pve.proxmox.com)
It works like a charm :-)

Future of OpenVZ?

Posted Jul 26, 2012 23:51 UTC (Thu) by dowdle (subscriber, #659) [Link]

The solution is simple... if Debian is dropping OpenVZ support... and they do have a good reason... don't use Debian as your host node distro.

OpenVZ dropped all of the non-RHEL-based branches... some time ago... and while the Debian folks have been maintaining their own OpenVZ branch... there have been bugs and feature differences to the degree that I think the recommendation has been to actually use the RHEL-based OpenVZ kernel on Debian host nodes. The problem comes in with newer Debian releases may not be compatible with the current RHEL-based branches.

For those who really want to run Debian on their OpenVZ host node, perhaps a RHEL7-based OpenVZ kernel (very speculative) from the future will work. :)

Future of OpenVZ?

Posted Jul 27, 2012 15:39 UTC (Fri) by dskoll (subscriber, #1630) [Link]

The solution is simple... if Debian is dropping OpenVZ support... and they do have a good reason... don't use Debian as your host node distro.

The solution is not that simple. All of our management tools and scripts assume Debian. I haven't used a RedHat-like distro in years, so I'd have to learn all the new management and packaging tools, modify my scripts, etc. It's not so easy to change a major thing like a distro.

I realize OpenVZ has problems, but this decision means Debian Wheezy won't have a viable container system. They dropped Linux-VServer a while back and now they're dropping OpenVZ in favour of LXC, but LXC is nowhere near ready. :(

Future of OpenVZ?

Posted Jul 30, 2012 8:04 UTC (Mon) by kolyshkin (guest, #34342) [Link]

You can use OpenVZ RHEL6-based kernel on Debian:
http://wiki.openvz.org/Install_kernel_from_RPM_on_Debian_6.0

Future of OpenVZ?

Posted Jul 30, 2012 7:54 UTC (Mon) by kolyshkin (guest, #34342) [Link]

We feel your pain. And here are some good news: we are porting vzctl to be able to run on top of non-openvz kernel. That way, you won't get as good isolation and as much features as with OpenVZ kernel, but you will have basic functionality with a familiar and decent userspace tool.

The other thing is, we will provide DEB repository with our kernels so you'll be able to use it.

Future of OpenVZ?

Posted Jul 31, 2012 16:40 UTC (Tue) by emmi3 (guest, #62443) [Link]

Even now I wouldn't recommend using Debian (Squeeze) as OpenVZ Host. We had some serious problems;
- CPU limits don't work. This was a known upstream OpenVZ-bug which was later on fixed, but this fix could not easily be backported to the (near vanilla) 2.6.32 Debian kernel, since OpenVZ-upstream only developes for the (far from vanilla) 2.6.32 RedHat kernel. (And Redhat does not release seperate patches anymore). IoW: in fact hardly any OpenVZ-upstream fixes can flow into Debian right now, so I would prefer if Debian would officially state that they cannot support OpenVZ anymore right now not only for wheezy.
- Occasionally one guest would rum amok and only a reboot of the *host* would help. It was "fun" moving all the other guests to different hosts.

Even though we use only debian for everything else, it was decided to switch all the OpenVZ-hosts to Sientific Linux. This switch ist not quite complete yet, but a colleague said: "Now OpenVZ is fun again".

Future of OpenVZ?

Posted Oct 10, 2013 0:32 UTC (Thu) by kolyshkin (guest, #34342) [Link]

Sorry to blow the dust off the old thread, but OpenVZ has just announced kernels and tools for Debian Wheezy at http://ftp.openvz.org/debian


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