Page 659 - Cloud computing: From paradigm to operation

XaaS 3

I.2 IaaS use case on infrastructure level

Use case

Name IaaS use case on infrastructure level
Abstract CSC uses a composition of processing, storage and networking resources with service
logic, specific SLAs and charging model, provided by the CSP
Roles CSC, CSP
Figure CSC
CSP

Network resource pool

Storage resource pool

Portal Computing resource pool
Cloud infrastructure
Y.3513(14)_FI.2

Pre-conditions – CSC accesses the IaaS through portal with appropriate security mechanism and
(optional) retrieves computing, storage and network functions.
Post-conditions

(optional)
Description – CSC accesses and queries the CSP portal to retrieve the list of supported functions
(e.g., infrastructure templates) related to the infrastructure.
– CSC selects the appropriate infrastructure template from the query results and
requests the CSP to create an infrastructure based on the selection.
– CSC manages and monitors the created infrastructure during its lifecycle. It includes,
but not limited to:
• assign: start IaaS by allocating to the service the available resources as identified by
configuration (e.g., create, initiate, start, enable, power-on)
• modify: change the amount of resource being in-use according to the demand (e.g.,
update, add, enable, disable)
• release: close the IaaS service by making available the resource being in-use by the
service (e.g., delete, shutdown, disable, power-off)
• query
Requirements – IaaS operations (refer to clause 7)
– Infrastructure resources status (refer to clause 7)
– Infrastructure template (refer to clause 7)

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