DevOps & Infra
CI/CD pipelines, containers, Kubernetes, reverse proxies, load balancers and CDN caching.
Intermediate
5 guidesCI/CD pipeline stages: from commit to production
How a CI/CD pipeline is put together: build, test and security stages, one artifact promoted through environments, approvals, rollbacks and secrets.
What is a Docker container? Images, layers and Dockerfiles
What a container is and how it differs from a virtual machine, how images and layers work, a small production Dockerfile, and rules for clean images.
Kubernetes concepts: Pods, Deployments and Services
The core Kubernetes objects and how they fit together, how desired state, rolling updates and health probes work, and when Kubernetes is more than you need.
Reverse proxy vs load balancer: what each one does
What a reverse proxy does, how layer 4 and layer 7 load balancing differ, common algorithms and health checks, and why X-Forwarded-For needs care.
How CDN caching works: cache keys, hits and purges
How a CDN decides what to store and for how long: cache keys, s-maxage, hits and misses, revalidation, purging, the Vary header and what to keep off it.
Tools for this topic
Try what these guides describe on your own URLs, domains, code or files.
Paste a deploy script, config file or diff to flag hard-coded API keys and disabled certificate checks before you commit it.
Follow a URL through every redirect hop and status code to catch an HTTP-to-HTTPS loop behind a TLS-terminating proxy.