From mboxrd@z Thu Jan 1 00:00:00 1970 From: Serge Hallyn Subject: Re: containers and cgroups mini-summit @ Linux Plumbers Date: Wed, 25 Jul 2012 07:15:47 -0500 Message-ID: <20120725121547.GB7960@sergelap> References: <4FFDF321.4030103@openvz.org> <500FD022.6000608@parallels.com> <20120725115148.GA6213@sergelap> <500FDE1B.4090907@parallels.com> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <500FDE1B.4090907-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org> Sender: cgroups-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Glauber Costa Cc: Kir Kolyshkin , Frederic Weisbecker , Daniel Lezcano , Johannes Weiner , Tejun Heo , Rohit Seth , Greg Thelen , Eric Biederman , Balbir Singh , Dhaval Giani , KAMEZAWA Hiroyuki , Paul Turner , Tim Hockin , Suleiman Souhlal , Dave Kleikamp , cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devel-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org, James Bottomley , Pavel Emelyanov , Maxim Patlasov Quoting Glauber Costa (glommer-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org): > On 07/25/2012 03:51 PM, Serge Hallyn wrote: > > Quoting Glauber Costa (glommer-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org): > >> On 07/12/2012 01:41 AM, Kir Kolyshkin wrote: > >>> Gentlemen, > >>> > >>> We are organizing containers mini-summit during next Linux Plumbers (San > >>> Diego, August 29-31). > >>> The idea is to gather and discuss everything relevant to namespaces, > >>> cgroups, resource management, > >>> checkpoint-restore and so on. > >>> > >>> We are trying to come up with a list of topics to discuss, so please > >>> reply with topic suggestions, and > >>> let me know if you are going to come. > >>> > >>> I probably forgot a few more people (such as, I am not sure who else > >>> from Google is working > >>> on cgroups stuff), so fill free to forward this to anyone you believe > >>> should go, > >>> or just let me know whom I missed. > >>> > >>> Regards, > >>> Kir. > >> > >> I just came up with the following preliminary list of sessions: > >> > >> http://wiki.linuxplumbersconf.org/2012:containers > > > > Thanks. We could also add devices namespace to the list. I'm fine NOT > > having it in the list, as I think we're agreed that it should come after > > user namespaces are complete. > > > How about a "future of namespaces" generic placeholder? Sure. And I suppose syslog and time ns could also fall under that. Issues to discuss include: 1. what other namespaces do people expect to need? 2. justifications for the proposed namespaces, and other potential ways to address each. I.e., for devices ns, two justifications are (1) per-container loop devices (could be pre-allocated with containers aware of which /dev/loopN index they may use), and (2) filtering uevents only to appropriate containers to limit the uevent storm when containers do udevadm trigger --action=add (not sure, but we can brainstorm other solutions). 3. semantics for the namespace - I.e syslog namespace, how do we decide whether/when to unshare it, is it owned by a user namespace or a pid namespace, etc.