ML: Can you update us on the current status of OpenVZ integration into the mainline kernel? Do you expect anything to happen in the near future regarding integration?
Kir: Most notable is the addition of the PID namespace patchset by Pavel Emelyanov into -mm (Andrew Morton's) tree -- it means the code will be in Linus' kernel in a few months. PID namespaces is a feature that makes it possible to have different sets of PIDs in different containers. The code was mostly developed by OpenVZ's Pavel Emelyanov, with some pieces from IBM's Sukadev Bhattiprolu. With the first version sent back in May, it was rewritten a few times to incorporate comments, suggestions and feature requests from everyone who was interested.( Read more...Collapse )
I'd also like to add that just a few days ago the memory controller patchset was also accepted into -mm tree. It does things similar to user beancounters in OpenVZ. So far, the accepted code only provides group-based RSS and page cache accounting, plus a generic infrastructure to add another accountables. The code was developed by Pavel Emelyanov and Balbir Singh (of IBM) in close collaboration.
With that in place, today Pavel already sent the first version of kernel memory controller. The code is not aimed for inclusion yet -- it is mostly aimed at spiking the discussion and trying to determine the needs.
Recently, I had the opportunity to present at a session of the Gelato Itanium Conference and Expo in San Jose. It was a good fit because they had a special track on virtualization, and OpenVZ (and the Virtuozzo product) is the only stable virtualization technology available now for Itanium servers.
Once again, I was able to talk with Andrew Morton (a kernel hacker, the right hand of Linus Torvalds) and was encouraged about the prospect of OS virtualization and OpenVZ in the Linux kernel. That is something we would really like to see and have been working towards. This article summarizes Andrew’s remarks noting “OpenVZ already has thousands of systems out there” and “as far as containerization standard in mainline goes, ‘most of the stakeholders are playing together quite nicely’”.
Yes, we are and we’ll keep at it so we can realize our goal.
I tried it and was able to migrate a CentOS 7 container... but the Fedora 22 one seems to be stuck in the "started" phase. It creates a /vz/private/{ctid} dir on the destination host (with the same…
The fall semester is just around the corner... so it is impossible for me to break away for a trip to Seattle. I hope one or more of you guys can blog so I can attend vicariously.
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Do you still stand by your opinions above now in 2016?…