DevOps is an emerging practice to be followed in Software Development life cycle. The name DevOps indicates that its an integration of Development and Operations team. It is followed to integrate the various stages of the development lifecycle. DevOps is an extended version of the existing Agile method. DevOps aims at Continuous Integration, Continuous Delivery, Continuous Improvement, faster Feedback and Security. This paper reviews the building blocks of DevOps, challenges in adopting DevOps, models to improve DevOps practices and Future works on DevOps.