Quality-aware Self-Management for Service
Processes in Service-Oriented Architectures
Steffen Bleul
Kassel University,Distributed Systems,bleul@vs.uni-kassel.de Abstract.One of the salient features of Service-Oriented Architectures
is that services can be deployed and removed at runtime.But service
replacement and management for service processes is a demanding task
in complex IT-Systems,especially under additional constraints like op-
timizing the Quality of Service of a service process.A self-managing
system is desired but missing.We have already achieved self-healing and
self-optimization with our service brokering system.We apply ontologies
to discover service alternatives and their QoS.In this paper we not only
present our work on quality-aware service discovery but also propose a
self-manageable infrastructure for service processes.The infrastructure
can be dynamically instantiated,configured and bound to management
endpoints with semantic service discovery.The approach not only auto-
mates the binding of service management systems of multiple vendors
but also the SLA monitoring and the ad-hoc integration of services in
service processes.
1Introduction
A Service-Oriented Architecture(SOA)is the ideal architecture for highly dy-namic systems especially for complex enterprise IT-Systems.The business logic of an enterprise can be directly implemented as services and arranged to business processes in the form of service compositions.A SOA directly reflects the need for easy integration,reusability and change without affecting the course of business. When it comes to Service Management,any architecture for distributed appli-cations forfeits its salient advantages without some kind of self-management. Service management must ensure a certain level of quality which requires fast recognition and handling of service problems throughout the SOA.
An important building block for a self-manageable system is the Semantic Web.We have developed ontologies to describe service processes,services and their QoS.They allow automatic quality-aware binding of services to service processes at runtime[1].Whereas semantic service discovery is important for Service Management it is just thefirst step towards self-management.In this paper we present an approach for a self-manageable infrastructure.Newly de-ployed service processes,their management endpoints and management entities are automatically instantiated and connected.We apply semantic service dis-covery in order to support automatic configuration of the infrastructure.The required management model and components are introduced in Section2.We
