Daniel Hokka Zakrisson wrote:
Dave Leskovec wrote:
> Attached is a simple program that uses the clone() function to create a
> container. This is not intended as a patch - just an example of what
> creating a Linux Container looks like. Something along these lines will
> be used by the Linux Container driver to start the domain. The code run
> within this container is really simple. It just mounts the /proc file
> system and then dumps the ps output to a file showing that the container
> is in separate process space.
>
> To run this you will need to have PID namespaces support enabled. Turn
> on CONFIG_PID_NS when compiling the kernel. You must run the program as
> root or the clone() call will fail.
>
> Any questions or comments are welcome. Thanks!
>
You want to use at least CLONE_NEWIPC and CLONE_NEWUSER too. CLONE_NEWUTS
is probably desired as well, so you can have different hostnames, and
CLONE_NEWNET for networking (though that's probably not going to be usable
until after 2.6.25, at least).
Thanks! I added CLONE_NEWIPC and CLONE_NEWUTS. Adding CLONE_NEWUSER
caused clone() to fail. I'm looking into that.
I'll post in the near future regarding CLONE_NEWNET, network support for
containers, and the XML format.
--
Best Regards,
Dave Leskovec
IBM Linux Technology Center
Open Virtualization