Kubernetes Pod and Deployment manifests

Kubernetes orchestrates containerized workloads at scale. A Pod is the smallest deployable unit, wrapping one or more containers. Deployments manage Pod replicas with declarative updates and rollbacks. The spec.replicas field sets desired Pod count. s

Docker Compose for multi-container applications

Docker Compose orchestrates multi-container applications with a single YAML file. The docker-compose.yml defines services, networks, and volumes declaratively. Each service maps to a container with its own image, ports, environment, and dependencies.

Docker fundamentals: images, containers, and layers

Docker packages applications into lightweight, portable containers. A Dockerfile defines build instructions—each instruction creates an immutable layer. The FROM directive sets the base image. COPY and ADD bring files into the image. RUN executes comm