Page 168 - Cloud computing: From paradigm to operation

1 Framework and requirements for cloud computing

Table I.6 – A use case of cloud service selection and configuration from CSC

Title A use case of cloud service selection and configuration from CSC.
Description A CSC accesses a workspace provided by a CSN: cloud service broker with previously registered
IDs and passwords.
Cloud services shown in a product catalogue are usually managed in the form of images that
packages a virtual machine, OS and applications.
To search cloud services that the CSC wants to use, the CSC inputs information of the cloud
services into the workspace. The information of the cloud services would be CSP's location,
prices, hardware specification of virtual machine, OS types, applications, SLA, etc.
The CSN: cloud service broker can automatically find the services best matched with search
terms from the CSC. The CSB workspace also provides the interfaces where the CSC can search
the cloud services in a product catalogue manually.
In some cases, a CSC can configure a cloud service by selecting separate elements of the cloud
service not by choosing a full packaged cloud service.
After searching or configuring a cloud service, a CSC receives corresponding SLAs and billing
information adjusted by the CSN: cloud service broker. On CSC's acceptance, the contract phase
begins, otherwise the CSC can search and configure cloud services again.

Roles/sub-roles CSP, CSN: cloud service broker, CSC
Figure

Pre-conditions The CSC is a member of the CSN: cloud service broker and has an account for accessing CSB
(optional) workspace.
Post-conditions The contract between the CSC and CSN: cloud service broker is established.
(optional)
Derived – Providing the best matched cloud service (See clause 7.2)
requirements – Configuration of cloud service for contract (See clause 7.3)

160