Community-Lab introduction

   nodes, users, slices, slivers, etc.
3. The researcher chooses a couple of nodes and creates sliver descriptions
   for them belonging to the previous slice.  Both sliver descriptions include
   a public interface to the CN and user-defined properties for telling apart
   the source sliver from the target one.  Sliver descriptions go to the
   registry.
4. Each of the previous nodes gets a sliver description for it.  If enough
   resources are available, a container is created with the desired
   configuration.
5. Once the researcher knows that slivers have been instantiated, the server
   can be commanded to activate the slice.  The server updates the registry.
6. When nodes get instructions to activate slivers they start the containers.
7. Containers run the experiment setup program and the run program.  The
   programs query sliver properties to decide their behaviour.
8. Researchers interact straight with containers if needed (e.g. via SSH) and
   collect results from them.

   nodes, users, slices, slivers, etc.
3. The researcher chooses a couple of nodes and creates sliver descriptions
   for them belonging to the previous slice.  Both sliver descriptions include
   a public interface to the CN and user-defined properties for telling apart
   the source sliver from the target one.  Sliver descriptions go to the
   registry.
4. Each of the previous nodes gets a sliver description for it.  If enough
   resources are available, a container is created by applying the desired
   configuration over the selected template.
5. Once the researcher knows that slivers have been instantiated, the server
   can be commanded to activate the slice.  The server updates the registry.
6. When nodes get instructions to activate slivers they start the containers.
7. Containers run the experiment setup program and the run program.  The
   programs query sliver properties to decide their behaviour.
8. Researchers interact straight with containers if needed (e.g. via SSH) and
   collect results from them.