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    SubjectRe: [ckrm-tech] [PATCH 7/7] containers (V7): Container interface to nsproxy subsystem
    Quoting Eric W. Biederman (
    > Srivatsa Vaddagiri <> writes:
    > > On Mon, Apr 02, 2007 at 09:09:39AM -0500, Serge E. Hallyn wrote:
    > >> Losing the directory isn't a big deal though. And both unsharing a
    > >> namespace (which causes a ns_container_clone) and mounting the hierarchy
    > >> are done by userspace, so if for some installation it is a big deal,
    > >> the init scripts on initrd can mount the hierarchy before doing any
    > >> unsharing.
    > >
    > > Yes I thought of that after posting this (that initrd can mount the
    > > hierarchies), so this should not be an issue in practice ..
    > >
    > >> Can you think of a reason why losing a few directories matters?
    > >
    > > If we loose directories, then we don't have a way to manage the
    > > task-group it represents thr' the filesystem interface, so I consider
    > > that bad. As we agree, this will not be an issue if initrd
    > > mounts the ns hierarchy atleast at bootup.
    > I suspect that could be a problem if we have recursive containers.
    > Even by having a separate mount namespace for isolation you really
    > don't want to share the mount. If you can see all of the processes
    > you do want to be able to see and control everything.

    Are you asking about what happens if initrd in a vserver asks to
    mount -t container -o ns,cpusets /containers

    I suppose in that case it would make sense to allow a separate mount
    instance with it's own superblock, with s_root pointing to the dentry
    for the container the vserver is in?

    > I guess I want to ask before this gets to far. Why are all of the
    > namespaces lumped into one group? I would think it would make much
    > more sense to treat each namespace individually (at least for the
    > user space interface).
    > Eric
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      Last update: 2007-04-03 17:43    [W:0.021 / U:17.608 seconds]
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