DevOps is an approach to software development that enables teams to build, test, and release software faster and more reliably by incorporating agile principles and practices, such as increased automation and improved collaboration between development and operations teams. Development, testing, and deployment occur in both agile and DevOps. Yet traditional agile stops short of operations, which is an integral part of DevOps.
The goal of DevOps is to help bring together developers who write application software and operations who run the software in production. Also, to build and maintain the infrastructure where it runs. DevOps replaces the old approach of development teams writing applications then throwing them over the wall to an operations team who deploys and manages the software with minimal visibility into how it was developed. In a DevOps environment, developers and operations teams work side by side throughout the entire process of developing, deploying, and managing applications.
Two common frameworks for understanding DevOps are “Three Ways” and “CALMS”, an acronym for Culture, Automation, Lean, Measurement, and Sharing. Culture refers to the cultural shift where development and operations work more cohesively. Automation increases velocity and ensures higher quality. The lean principles of continuous improvement and embracing failure are the foundation of an experimental mindset. Measure refers to the practice of measuring results to improve processes. Sharing emphasizes the importance of DevOps as a group effort and adopting best practices.