DevOps Articles — CodersSecret

Learn Kubernetes, Docker, CI/CD, cron jobs, and infrastructure automation for production systems.

• Are DAGs Dying? The Rise of Declarative Data Pipelines — DAGs are not dying, but task-first orchestration is changing. Learn declarative data pipelines, asset graphs, data contracts, freshness policies, and when Airflow still fits.
• Scheduling Systems: How Kubernetes, Airflow, and Distributed Schedulers Place and Run Workloads — How real scheduling systems decide what runs where. Kubernetes scheduler internals, distributed cron, queue-based job orchestration with Airflow and Nomad, bin-packing and fairness algorithms, and the failure modes that determine whether your workloads survive node failure.
• Linux Commands Every Developer Should Know But Doesn't — You know ls and grep. But do you know awk, xargs, jq, strace, lsof, and ss? These commands turn a 2-hour debugging session into a 5-minute investigation. Real scenarios, real commands, real solutions.
• GitHub Actions Mastery: CI/CD Pipelines That Actually Scale — Your GitHub Actions workflow takes 20 minutes and fails randomly. Learn matrix builds, reusable workflows, aggressive caching, secrets management, self-hosted runners, and monorepo strategies that cut build times by 80%.
• Observability Stack: Logs, Metrics, and Traces with OpenTelemetry — Logs tell you what happened. Metrics tell you how much. Traces tell you where time was spent. OpenTelemetry unifies all three into one instrumentation layer. Learn to build a complete observability stack from scratch.
• Terraform from Zero to Production: Infrastructure as Code That Scales — Stop clicking around cloud consoles. Terraform lets you define, version, and automate your infrastructure. Learn modules, state management, workspaces, CI/CD pipelines, and the mistakes that corrupt your state file.
• Kubernetes Debugging Toolkit: From kubectl to Victory — Pod stuck in CrashLoopBackOff? Service not routing traffic? Node running out of memory? This is your battlefield guide to debugging Kubernetes — real commands, real scenarios, real fixes.
• Docker Multi-Stage Builds: Shrink Your Images by 90% — Your Docker images are bloated with build tools, dev dependencies, and source code that has no business in production. Multi-stage builds can shrink a 1.2GB image to 45MB. Here is exactly how to do it for Node.js, Python, Go, and Java.
• Envoy Proxy and xDS: The Dynamic Control Plane for Modern Infrastructure — Understand Envoy proxy from the ground up — listeners, clusters, routes — then build a dynamic control plane with xDS. Learn why every service mesh (Istio, Linkerd, Consul) is built on Envoy.
• GreptimeDB + Grafana: Build a Modern Observability Stack from Scratch — Set up GreptimeDB as your time-series database and connect it to Grafana for real-time dashboards. A practical tutorial covering installation, data ingestion, PromQL queries, and production dashboards.
• Cloud IAM Demystified: AWS, GCP, and Azure Identity Management Compared — A practical guide to Cloud IAM across AWS, GCP, and Azure. Learn the terminology mapping, see real policy examples, and understand the right approach for production — no matter which cloud you use.
• Kubernetes Networking Made Simple: Services, Ingress, and Load Balancers Explained — Confused by ClusterIP, NodePort, LoadBalancer, Ingress, and ALB Controller? This beginner-friendly guide explains when to use each Kubernetes networking option — with real analogies, diagrams, and practical examples.
• Karpenter: Intelligent Kubernetes Autoscaling That Actually Works — A hands-on tutorial on Karpenter — the next-generation Kubernetes node autoscaler. Learn how it replaces Cluster Autoscaler, provisions the right nodes in seconds, and cuts your cloud bill by 60%.
• Kubernetes Operators: Build Your Own Operator Using Golang — Learn what Kubernetes Operators are, why they matter, and how to build your own custom operator from scratch using Golang and the Operator SDK.
• Cron Jobs Explained: The Complete Guide with Real-World Examples — Everything you need to know about cron jobs — from basic syntax to advanced scheduling patterns. Packed with practical examples anyone can follow.