This book is an exploration of Apache Mesos. The author aims to help you learn how to use Apache Mesos. The first part of the book helps you learn what Apache Mesos is. The various components of Apache Mesos are discussed, along with their different purposes. You will also learn how to setup the Mesos environment before you can begin to use it. Authentication and Authorization are very important aspects in Mesos. Authentication determines the users who are able to access Mesos while Authorization determines the resources one can use when using it. This book helps you understand how these processes happen and how you can modify them to suit your needs. Apache Mesos supports the concept of use of containers. This book helps you understand how this is done. Under normal circumstances, tasks will misbehave or fail. This means that we should come up with a way of checking the health of various tasks. This book helps you understand how to do this in Apache Mesos. The concept of framework rate limiting is also explored in this book, thus, you will learn how it works. You are also guided on how to write your own Apache Mesos frameworks by the use of Java programming language. The following topics are discussed in this book: - Getting Started with Apache Mesos- Authentication and Authorization- Container Image Support in Mesos Containerizer- Task Health Checking- Framework Rate Limiting- Building an Apache Mesos Framework- Maintenance Primitive