Authors:
Vladimir Yussupov
1
;
Uwe Breitenbücher
1
;
Ayhan Kaplan
2
and
Frank Leymann
1
Affiliations:
1
Institute of Architecture of Application Systems, University of Stuttgart, Germany
;
2
iC Consult GmbH, Stuttgart, Germany
Keyword(s):
Serverless, Function-as-a-Service, FaaS, Portability, Decision Support System.
Abstract:
The term serverless is often used to describe cloud applications that comprise components managed by third parties. Like any other cloud application, serverless applications are often tightly-coupled with providers, their features, models, and APIs. As a result, when their portability to another provider has to be assessed, application owners must deal with identification of heterogeneous lock-in issues and provider-specific technical details. Unfortunately, this process is tedious, error-prone, and requires significant technical expertise in the domains of serverless and cloud computing. In this work, we introduce SEAPORT, a method for automatically assessing the portability of serverless applications with respect to a chosen target provider or platform. The method introduces (i) a canonical serverless application model, and (ii) the concepts for portability assessment involving classification and components similarity calculation together with the static code analysis. The method a
ims to be compatible with existing migration concepts to allow using it as a complementary part for serverless use cases. We present an architecture of a decision support system supporting automated assessment of the given application model with respect to the target provider. To validate the technical feasibility of the method, we implement the system prototypically.
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