Block Diagram
Version 7 (8/3/2015). Click to enlarge.
Design/Implementation
NDS Explorer Implementation
NDS Web Services Implementation
- Python/Django/Django-REST-Framework
- Use the OpenStack nova API to perform the calls to the OpenStack management functions
- What do the REST calls actually look like?
- Regarding the installation of the OpenStack python libraries: We probably eventually want to move this to being fully self-contained with a requirements.txt file. requirements.txt is a mechanism of specifying things to pip so that things can be pip installed; it's similar to what enables webapps to be deployed in "kernel" form on things like amazon beanstalk and so on, too. If we do it this way, our webapp will be pip-installable, and will install into ~/.site-local if need be.
Authentication/Authorization
- For the initial version, we will use a service account for OpenStack. Users credentials will not be OpenStack credentials.
- The OpenStack credentials are used by the REST API logic and are not provided by (nor known to) the user. This will need to be specified in such a way that it will not be accidentally committed to the repository.
Application State
- How to tell what Environments exist?
- If they were created by NDS Web Services (and have not been deleted), then they exist. Ignore any NDS Environments that have been created manually (not using NDS Web Services).
- How to store info about the existing Environments?
- How to store the Service definitions?
- Use the easiest and most straightforward solution for the first prototype.
Service Definition Files
- The service definition will need to include environment variables that are passed in which can/should be free-form text + a set of predefined env vars. These can be obtained by parsing the JSON returned from "docker inspect", and for any orchestrated multi-service environments we'll want dedepulication of env vars.
Guiding Principles
This section provides useful and relevant things to consider. These items should not be taken as concrete requirements.
Prior Versions of the Block Diagram
Version 6 (7/28/2015). Click to enlarge.
Version 5 (7/24/2015). Click to enlarge.
Version 4 (7/15/2015). Click to enlarge.
Version 3 (6/16/2015). Click to enlarge.
From 6/12/2015 meeting:
From 6/10/2015 meeting:
