This book is an exploration of DevOps (Developer Operations). It begins by explaining what DevOps is, how it is used, and why it was introduced. The next step is a guide on how one can set up TomEE from Puppet. The Puppet and Packer immutable servers are also explored, and thus you will know how to work with them after reading this book. The book will guide you on how to set up a modern web stack in Ubuntu, which is a distribution of the Linux operating system. With the advancement in technology, users now liketo use databases which are more advanced for their applications. Note that each of the web applications developed has a database. With DynamoDB, the administration overhead is greatly reduced. This book will guide you on how to shift your database from MongoDB to DynamoDB.