Monitoring and Reconfiguration for OCCI Resources

Monitoring and reconfiguration are critical issues in Cloud environments. Monitoring allows to detect violations and specific events, while reconfiguration allows to activate corrective mechanisms or runtime modifications. In this paper we propose an extension for Open Cloud Computing Interface (OCCI) to enable monitoring and reconfiguration. The extension describes the needed elements to manage (i.e., to monitor and reconfigure) cloud resources on demand. The definition entails the introduction of new OCCI Resources, Links and Mixins. We define on the one hand new types needed to monitor metrics based on a previously established SLA. On the other hand we define the needed types to reconfigure our managed resources when needed. The newly added elements are OCCI entities defined as generic Kinds, that are specialized using OCCI Mixins. Using these elements, the user is provided with a monitoring and reconfiguration infrastructure on demand. We propose herein, a real use case based on HTTP rendering showing how to establish and link the described elements of the infrastructure.