Tutorials
Event-Driven Apps with Lambda & EventBridge
Design an event-driven pipeline on Lambda and EventBridge that handles poison messages, retries and cold starts.
Kubernetes FinOps on EKS with Karpenter
Replace static EKS node groups with Karpenter's just-in-time, bin-packing provisioning to cut compute spend.
Hardening Production AWS EKS Clusters
Three controls that separate a hardened EKS cluster from a default one: IRSA, NetworkPolicies and OPA Gatekeeper.
Zero-Downtime PostgreSQL Upgrades & Replication
Move a production PostgreSQL database to a new major version with logical replication, avoiding pg_upgrade downtime.
Enterprise GitOps Pipelines with ArgoCD & Helm
A multi-environment GitOps setup with Argo CD and Helm: app-of-apps, per-environment overlays and self-healing sync.
CI/CD Secrets Management with HashiCorp Vault
Move secrets out of CI/CD variables and .env files into Vault, and give the pipeline short-lived credentials.
Nginx as a Reverse Proxy with Let's Encrypt SSL
A hardened Nginx reverse proxy in front of your app, with Let's Encrypt certificates that actually auto-renew instead of silently expiring.
Full-Stack Monitoring with Prometheus & Grafana
A working Prometheus and Grafana stack with scrape configs, an alert rule and a provisioned dashboard.
Kubernetes Deployments, Services & Ingress
The three objects behind most Kubernetes apps, and the rollout settings that make a bad release a non-event.
Server Configuration at Scale with Ansible
Structure Ansible inventories, roles and playbooks so server configuration stays idempotent and easy to review.
Provisioning a Secure AWS VPC with Terraform
A production-shaped AWS VPC in Terraform, with public and private subnets, NAT, route tables and safer defaults.
Linux Administration & Bash Automation
Linux fundamentals and reusable Bash scripts for log cleanup, health checks and scheduled jobs.
Automated CI/CD Pipeline with GitHub Actions
A first pipeline that builds, tests and deploys on every push, with secrets handled properly and a build matrix.
Containerizing Your First App with Docker Compose
Write a lean multi-stage Dockerfile and a docker-compose.yml that runs your app and its database.
Secure Static Website on AWS S3 & CloudFront
Host a static site on S3 behind CloudFront with Origin Access Control, ACM TLS and a cache-invalidating deploy.
Kubernetes Cost Optimization on GKE
Rightsize requests with VPA, tune HPA, add Spot node pools and get the cluster autoscaler to scale back down.
Multi-Region PostgreSQL Failover, Tested End to End
Streaming replication, a rehearsed promotion runbook and nightly restore tests for a multi-region PostgreSQL setup.
From 45 Minutes to Under 5: CI/CD Build Acceleration
A worked example of the caching, parallelization and runner changes that cut a 45-minute pipeline to under 5.
Refactoring Legacy Terraform for Teams
Move from one sprawling state file to versioned modules, safe migrations and policy-as-code guardrails.
The 2026 Cloud Cost Optimization Playbook
A field-tested framework for cutting cloud spend without cutting reliability: rightsizing, committed-use discounts, and what makes savings stick.
Cut Deployment Lead Time to Under an Hour
Replace manual approval chains with GitOps, Argo CD and a canary, so changes ship in small batches under change control.
7 Architecture Red Flags We Find in Reviews
Failure patterns that recur in architecture reviews, from single points of failure to IAM sprawl.