Merging of TOSCA Cloud Topology Templates - IAAS

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1 Introduction Not in the scope of this master’s thesis is the research how the management plans of two TOSCA Service Templates have to be adjusted after the TOSCA elements of two Topology Templates have been merged. 1.2 Motivating Scenario To illustrate the motivation for the merging of two Topology Templates the example of Fig. 1.1 is given. Two enterprises of equal size are merged in order to achieve synergies in their business operations. Their enterprise applications are modeled with simplified Topology Templates; the quadrangles with rounded corners represent the IT components, the arrows the relationships and connections between them. Several overlapping elements such as the Tomcat Application Servers [4] and the MySQL Databases [35] can be seen in the example. Furthermore, the Operating Systems in both Topology Templates are similar but not identical. Nevertheless, they are also redundant. In order to contribute to the synergetic effects the IT organizations of both enterprises must merge their enterprise application topologies. Fig. 1.1: Example of two Enterprise Topologies to be merged However, the manual identification of similar elements in both Topology Templates as well as the manual unification is a very exhausting task especially when the number of components is much larger than in this motivating scenario. Therefore, the development of con- 2
1 Introduction cepts of to find the overlapping elements inside and between two Topology Templates and merge them in a subsequent step aims to provide a tool that can automate this task. The example in Fig. 1.1 is picked up again in Chapter 9 when evaluating the results of this master’s thesis. 1.3 Research Design The master’s thesis at hand has the goal to develop concepts and algorithms for finding compatible elements inside and between two Topology Templates and merging them in a subsequent step. Therefore, the state of the art of the work in related areas such as graph, process and schema matching and merging is reviewed and analyzed. Appropriate approaches will be adapted for the matching and merging of Topology Templates. Subsequently, a set of requirements for the concepts, algorithms and the TOSCAMerge framework are derived that have to be followed in the next research step of systematically exploring the different matching and merging cases and developing concepts and algorithms to cope with these cases. The researched concepts and algorithms are implemented in a framework that allows the adding of domain-specific knowledge if certain steps cannot be conducted generically. A set of newly created TOSCA Service Templates will be used to evaluate the concepts, algorithms and the framework. 1.4 Outline This master’s thesis is structured in the following way: Chapter 1 - Introduction gives an introduction to the topic of merging of Topology Templates by stating the research problem, delineating the scope of this work, giving a motivating scenario and stating the research design. Chapter 2 - Fundamentals explains all the necessary fundamentals this work is based on. This includes Graph Theory, an introduction to Cloud Computing, the TOSCA specification and syntax as well as how to design extendable frameworks. Chapter 3 - Related Work discusses the work in related research fields such as graph, process and schema matching and merging and evaluates the usefulness and adaptability for this thesis. Chapter 4 - Assumptions and Requirements for Matching and Merging states the assumptions made by the author regarding the matching and merging of Topology Templates and identifies requirements on the concepts and algorithms for matching and merging. Chapter 5 - Concept for Matching of Topology Templates covers the finding of similar elements in two Topology Templates and identifies and discusses all different matching constellations that can be found inside and between the elements of Topology Templates. Furthermore, algorithms implementing the concept are designed. 3
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9 Evaluation of the Algorithms and
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10 Conclusion and Future Work 10 Co
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Bibliography Bibliography [1] Amazo
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Bibliography [28] S. Melnik, H. Gar
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