[Lxc-users] limiting RAM usage and disk space usage

[Serge E. Hallyn]

Quoting Gordon Henderson (gordon at drogon.net):
> On Thu, 2 Dec 2010, Serge E. Hallyn wrote:
> 
> > Quoting Gordon Henderson (gordon at drogon.net):
> >> On Mon, 29 Nov 2010, Trent W. Buck wrote:
> >>
> >>> Siju George <sgeorge.ml at gmail.com> writes:
> >>>
> >>>> 1) how do I limit the RAM usage of a container?
> >>>
> >>> In lxc.conf(5):
> >>>
> >>>    lxc.cgroup.memory.limit_in_bytes = 256M
> >>>    lxc.cgroup.memory.memsw.limit_in_bytes = 1G
> >>>
> >>>> 2) how do I limit the disk usage of a container ?
> >>>
> >>> Ensure the rootfs is a dedicated filesystem (e.g. an LVM LV), and limit
> >>> its size accordingly.
> >>
> >> Finally, a use for LVM....
> >>
> >> And here was me about to embark on using filesystems in files loopback
> >> mounted...
> >
> > That should also work, just a bit slower, right?
> 
> I don't know, really. I use loopback mounted filesystems for other things 
> and I don't really notice much slowdowns compared to the native 
> filesystem, but I've never benchmarked it.
> 
> It is some years since I looked at LVM and I wasn't impressed then so 
> stopped thinking about it and used something else (I was looking at 
> snapshot abilities at the time) I build systems for a purpose so rarely 
> have the need to do the only thing LVM might be handy for - ie. resizing a 
> volume so it just doesn't fgure in my systems, but maybe this is a valid 
> use now.

It seems to me that a little extension to lxc-create which creates
the container inside a loopback fs would be pretty neat.

-serge