Abstract
Cloud Computing allows users to access a shared pool of computing resources which include networks, servers, storage, applications and services. One of the major advantages of cloud is that the resources can be rapidly provisioned. However, many enterprises are still unwilling to move their IT infrastructure to cloud. Major concerns of enterprises are the initial expenditure on capital and the cost of maintenance of the cloud infrastructure which requires a new set of expertise. The huge licensing cost of proprietary cloud solutions is also a major concern. Hence open source cloud solutions are gaining popularity. In this paper we discuss major challenges faced while implementing an on-premise cloud using OpenStack and the solutions developed to overcome the same. The source code availability and strong support from a wide community made us choose OpenStack. The cloud usage model, introduced for better ROI (Return on Investment), which is capable of providing both Infrastructure as a Service (IaaS) and Platform as a Service (PaaS) is also discussed. Our experience proved that irrespective of all the challenges enterprise can save both time and money with the adoption of an on-premise open source cloud with a suitable service model.
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