Explore a DevOps engineer's journey in containerizing microservices and optimizing cloud costs. Learn how XO Group inverted their DevOps organization, leveraged Amazon Elastic Beanstalk for containerization, and achieved over 90% containerization of client-facing assets in under a year. Discover the challenges of increasing AWS spend and the strategic implementation of Docker Swarm to improve instance utilization and reduce cost per vCPU. Gain insights into provisioning swarm clusters, using drmachine, and updating clusters for enhanced efficiency and cost savings in cloud infrastructure management.