> Well, we would use docker internally, as a way of managing the different
> system images we offer our users, so it wouldn't be a matter of allowing
> users to ask to run arbitrary docker images.  The assumption is that we
> would have the images locally.


This is exactly what we are doing internally, we are tired of rolling up
our images, that is why we developed dockstrap: access to dozens of ready
to use root filesystems from docker :)

>
> Instead, we want to be able to run our uwsgi vassal workers from inside
> docker containers, instead of just running them as regular chrooted
> processes...  Does that make sense?

if you already have a name-space based setup in your current
infrastructure you only need to directly use the docker images (for
example if you are already using emperor-use-clone or unshare you do not
need another layer with docker). Compared with plain chroot docker is
absolutely better as it uses a more strong approach (in terms of security
and isolation). In addition to this docker has pretty transparent network
namespaces too, that in some context could be a great addition (no idea if
it could be useful for pythonanywhere)



-- 
Roberto De Ioris
http://unbit.it
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