[Users] OS/app in the OpenVZ container

[Enrico Weigelt]

* Kir Kolyshkin <kir at openvz.org> wrote:

> It's pretty simple. What OpenVZ kernel does it creates a container and
> runs /sbin/init inside it. What goes next is up to that particular
> /sbin/init. If you need to run an app let /sbin/init run just it, or let
> this app be /sbin/init (but bear in mind there will be no child reaper
> as in usual linux system so you might need to take some extra care about
> zombie processes).

ACK.

The probably easiest way is to take some minimal OS image, so you also
get a shell, libc, and essential setups (mounting /proc and /sys), etc.
You'll most likely also need some little setup stuff to let your app 
communicate with the outside world (eg. routing, filesystem access, etc).

Doing this all completely on your own takes a lot of more efforts,
but makes a good learning project :)

Some time ago (left it aside due lack of time), I've been working on
an kind of nano-distro for such use-cases, built with my Briegel
buildsystem (it crosscompiles tiny images which only include the
really essential stuff) . If you're really interested, I'd dig it
out again.


cu
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 Enrico Weigelt, metux IT service -- http://www.metux.de/

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