[Kimchi-devel] Sharing of functionality between Kimchi and Ginger

[Walter Niklaus]

Hi All,

first I want to clarify that the following proposal is targeting the 1.6 
release and can wait till we have stabilized the new UI in 1.6.
But I guess that it will take some discussion to come up with a good 
solution so I thought I'll start it now even knowing that I'll not be 
able to participate in the discussion for the next 2 weeks since I'll be 
travelling.

Problem statement:
    -  there is a set functionalities which are usefull/required in 
kimchi and ginger, for example:
          - logical volume management:
                - required by kimchi to define a storage pool based on LVM
                - required by ginger to manage the host owned logical 
volumes
          - networking:  VLAN assignement, bridge management
                - required by kimchi on virtual network management
                - required by ginger outside/without virtualisation

Currently the functionalities mentioned above are part of the kimchi plugin.

Options to address this problem:
   1. Implement the functionality in both plugins.
           Pros:   the current code in kimchi can stay unchanged
           Cons:  code dupplication, double maintanance
   2.  Share the source code modules
           Pros:   no code duplication
           Cons:  potential module duplication since the plugins are in 
different repos
   3.  "Interfacing" between the plugins: one plugin implements the 
functionality and is exposing an interface for other plugins
           Pros:   clean separation
           Cons:  dependency between plugins (but we have that anyhow 
already between kimchi and gingercommon)
   4. ???

My preffered Option would be 3. but potentially there are othere options 
and aspect I may have missed.