Automatic control of the quality of service contract by a third party in the Cloud Computing

One of the challenges of Cloud Computing (CC) is SLA assurance (SLA: Service Level Agreements). Due to the highly dynamic nature of cloud environment, defining the quality of service (QoS) in real-time is crucial to meet SLA specifications of the consumer. In this context, agreements (contract) service level form an appropriate solution to specify these QoS guarantees. It specifies one or more service level objectives (SLO), to guarantee that the QoS delivered satisfies the customer expectations. Monitoring these QoS agreements for the management of the relationships between cloud providers and their services customers is an area that attracts the attention of many researchers and industrialists in the cloud. In our work we introduce the concept of monitoring and respect of the QoS, then we present a third party service provider that ensures the respect of the quality of service in real-time to guarantee the performance and the reliability of the Cloud.