DRM4G Use Cases

Use case: Creating cloud credentials
Description	Creates the proxy certificate that will be used to access the Federated Cloud's services
Primary Actor	User
Preconditions	The DRM4G must be running on a terminal The user must have edited correctly the configuration file The user must have a valid grid certificate
Basic Flow	The user executes the command drm4g id <resource_name> init
Postconditions	A proxy valid for 7 days will have been generated
Alternate Flow	The user uses the option "--lifetime" to create an identity for a specific period of time

Use case: Creating VMs
Description	An active and accessible Virtual Machine(VM) will be created. It will be considered a host to whom the user can submit jobs to have executed
Primary Actor	User
Preconditions	The DRM4G must be running on a terminal The user must have edited correctly the configuration file The user must have already created the proxy credentials
Basic Flow	The user executes the command drm4g resource create
Postconditions	The VM's public IP direction will be shown Submitted jobs will also be sent to the VM
Alternate Flow

Use case: Adding VMs
Description
Primary Actor
Preconditions
Basic Flow
Postconditions
Alternate Flow

Use case: Listing VMs
Description
Primary Actor
Preconditions
Basic Flow
Postconditions
Alternate Flow

Use case: Listing resources
Description
Primary Actor
Preconditions
Basic Flow
Postconditions
Alternate Flow

Use case: Sending jobs
Description
Primary Actor
Preconditions
Basic Flow
Postconditions
Alternate Flow

Use case: Destroying all VMs
Description
Primary Actor
Preconditions
Basic Flow
Postconditions
Alternate Flow

Forthcoming features

Use case: Listing VMs with IDs
Description
Primary Actor
Preconditions
Basic Flow
Postconditions
Alternate Flow

Use case: Adding VMs dynamically
Description
Primary Actor
Preconditions
Basic Flow
Postconditions
Alternate Flow

Use case: Destroying VMs by ID
Description
Primary Actor
Preconditions
Basic Flow
Postconditions
Alternate Flow