This document summarizes Seungkyu Ahn's experience working with various technologies over time including transitioning from JSP/Servlet to Spring and Hibernate, CVS to Git, Ant to Maven, and Waterfall to Agile methodologies. It also lists technologies he has worked with like OpenStack, Linux, Docker, Kubernetes, and is currently learning like Deep Learning, Spring Boot, and mobile development. It provides configuration details for installing a Kubernetes cluster using Kubespray including specifying host files, roles, and cluster configuration with options like Calico networking, Kubernetes version, and enabling/disabling addons.