NDS Labs Use Scenarios

Notes from 2/8/16 discussion (Craig, David, Mike)

This is a preliminary set of use cases for the NDS Labs systems 

Users/Actors:

• NDS operations: Infrastructure and cluster administration at NCSA, TACC, SDSC.
• NDS project user: User of the NDS Labs GUI/CLI for managing services
• NDS developers: Local development staff and community members
  
  

NDS Operations

Prerequisites:

• • Openstack

Use cases:

• • NDS Operations creates tenant with sufficient resources (compute/storage) for NDS Labs cluster.
  • NDS Operations runs "deployer" (NDS-98). They are prompted to specify the cluster size. The deployer provisions VMs, deploys CoreOS images, starts docker/Kubernetes services. 
  • NDS Operations starts admin services (NDS-92). These are centralized logging/monitoring services used by NDS Operations across all sites.
  • NDS Operations adds services to services library (TBD).  Tentatively, NDS Operations must be able to specify NDS Labs services available to site users.
  • NDS Operations provisions NDS Labs projects (TBD).  Tentatively, approved project users will be allocated a Kubernetes namespace, assigned credentials and storage/compute quotas. They will be given an endpoint URL for GUI/CLI access (see below).

NDS Project User 

Prerequisites:

• • NDS Labs Provisioned project space and credentials

Use cases:

• • List available services for deployment
  • List available compute/storage quotas
  • Add service (e.g., cli add clowder name=myclowder)
  • Allocate storage (e.g., cli add vol name=myvol size=1TB)
  • Attach storage (e.g., cli attach myvol myclowder)
  • Launch services (e.g., cli start myclowder)
  • Get endpoint URL
  • View logs
  • Login to container (e.g., cli exec myclowder bash)

NDS Developer

Prerequisites:

• • Docker
    
    

Use cases:

• • NDS developer can containerize/Dockerize a new service or set of services (i.e., add Dockerfile and associated files to common source/build environment)
  • NDS developer can push new versions of Docker images to NDS repository
  • NDS developer can test containerized services in NDS Labs test environment
  • NDS developer can define Kubernetes configuration for a new service or set of services (i.e., add Pod/RC/Service definitions)
  • NDS developer can launch local Kubernetes environment (laptop, single VM)
  • NDS developer can add new service definitions to service library
  • NDS developer can launch a docker container with all required tools for development (ndsdev container)