Monitoring data collection

In the implemented framework, there are four different types of sources for collecting data: 1) container exporter which runs inside the container of the VNFs to collect data from its performance, 2) VM exporter that collects data from Virtual Machines (VMs) hosting VNFs, 3) OpenFlow exporter which utilizes OpenDayLight API to collect data from the OpenFlow controller, and 4) OpenStack exporter that has also been developed as a software module that uses OpenStack API to collect data from all OpenStack components.