Security Level www huawei com Questions for Implementers

Brief Understanding of TOSCA Implementer Recommendation l Defines Script Artifact, and proposes to pass

Questions about the implementation way l With the method in the Implementer’s Recommendation, the

Questions about the new bash l Why a new bash is needed? - The

Questions about EVs l How to ensure that all necessary Evs will be created

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Security Level: www. huawei. com Questions for Implementers Recommendation Aaron Zhang，Huawei HUAWEI TECHNOLOGIES CO. , LTD.

Brief Understanding of TOSCA Implementer Recommendation l Defines Script Artifact, and proposes to pass parameters through environment variables: p Container is responsible for mapping properties of Service. Template to environment variables (EV) with the same name (in the format of ${name} ) p Scripts will read the value of Evs needed during execution p The return value of the execution of a script may be written back to corresponding EVs HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page 2

Questions about the implementation way l With the method in the Implementer’s Recommendation, the definition of Interface seems useless, is this true? l And, some parameters are created dynamically and intermediately , how to make EVs for this kind of parameters? Which scripts will be responsible for this job? HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page 3

Questions about the new bash l Why a new bash is needed? - The capability to map properties to Evs can be provided as an internal feature of the TOSCA container. What’s the value for the new bash? l When the new bash will be created? -The first time when the package is deployed? -What will happen if the Service. Template is changed? Another new bash? -Will the bash become an inherent part of the package? Or in other words, will the new bash be part of the package is exported from the TOSCA container? l. Where to deploy the new bash? - All target virtual machines? EVs redundant? HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page 4

Questions about EVs l How to ensure that all necessary Evs will be created by the New bash? Or in other words, according to what the TOSCA container will decide the content of the new bash? l How can the container know that which properties will be mapped to Evs for each target VM? If the same new bash is executed in all target VMs, then redundant Evs are unavoidable. l Also, how to avoid name confliction among Evs ? HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page 5

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