About the authors

Allan Espinosa is a DevOps practitioner and an active open source contributor to various distributed system tools, such as Docker and Chef. Allan maintains several Docker images for popular open source software that were popular even before their official release from the upstream open source groups.

Throughout his career, Allan has worked on large distributed systems containing hundreds to thousands of servers in production. He has built scalable applications on various platforms, ranging from large supercomputing centers to production clusters in the enterprise. He is currently managing distributed systems at scale for Bloomberg, where he oversees the company's Hadoop infrastructure. Allan can be contacted through his Twitter handle, @AllanEspinosa. 

Russ McKendrick is an experienced system administrator who has been working in IT and related industries for over 25 years. During his career, he has had varied responsibilities, from looking after an entire IT infrastructure to providing first-line, second-line, and senior support in both client-facing and internal teams for large organizations.

Russ supports open source systems and tools on public and private clouds at N4Stack, a Node4 company, where he is the practice manager (SRE and DevOps). In his spare time, he has written several books including Mastering Docker, Learn Ansible and Kubernetes for Serverless Applications, all published by Packt Publishing.