Spacelift WorkerPool Operator: Technical Overview

In December 2021, Spacelift introduced an approach to run workers in Kubernetes using Docker-in-Docker. However, this method had some limitations such as security issues and inefficient resource usage. To address these problems, a more native Kubernetes approach was developed by creating a Kubernetes operator. The new approach involves two custom resources: WorkerPool and Worker. This design allows for better integration with Kubernetes features, improved scalability, and efficient use of cluster resources. The Spacelift worker Kubernetes operator is now available for customers to use in their projects.