  The commodity Single Board Computers (SBCs) are increasingly becoming
powerful and can execute standard operating systems and mainstream workloads.
In the context of cloud-based smart city applications, SBCs can be utilized as
Edge computing devices reducing the network communication. In this paper, we
investigate the design and implementation of a SBC based edge cluster (SBC-EC)
framework for a smart parking application. Since SBCs are resource constrained
devices, we devise a container-based framework for a lighter foot-print.
Kubernetes was used as an orchestration tool to orchestrate various containers
in the framework. To validate our approach, we implemented a proof-of-concept
of the SBC based Edge cluster for a smart parking application, as a possible
IoT use-case. Our implementation shows that, the use of SBC devices at the edge
of a cloud based smart parking application is a cost effective and low energy,
green computing solution. The proposed framework can be extended to similar
cloud-based applications in the context of a smart city.
