Weekly Digest

AWS CLI cheat sheet with copy-paste commands for EC2, S3, IAM, Lambda, ECS, CloudFormation, SSM, and Secrets Manager operations.

A data-driven playbook for cutting AWS costs across compute, storage, networking, and reserved capacity with real numbers and actions.

Build production-grade GitHub Actions CI/CD pipelines — from first workflow to reusable workflows, matrix builds, and deployment gates.

Git commands cheat sheet for DevOps engineers — branching, rebasing, stashing, bisecting, cherry-picking, and recovery workflows with examples.

A comprehensive guide to every Kubernetes deployment strategy — rolling updates, blue-green, canary, and progressive delivery with Argo Rollouts and Flagger.

Harden Kubernetes clusters for production with RBAC, network policies, pod security standards, secrets management, and admission controllers.

Linux networking commands cheat sheet for troubleshooting — interfaces, routing, DNS lookups, connections, iptables firewalls, and tcpdump packet capture.

Build a production Prometheus and Grafana monitoring stack from scratch — service discovery, recording rules, alerting, and dashboards.

PromQL cheat sheet with copy-paste query examples for rates, aggregations, histograms, label matching, recording rules, and alerting expressions.

Terraform CLI cheat sheet with commands organized by workflow — init, plan, apply, destroy, state manipulation, imports, and workspace management.

Build production-grade Terraform infrastructure — project structure, module design, state management, testing, and CI/CD pipeline integration.

Security headers and configuration reference — copy-paste snippets for Nginx, Kubernetes Ingress, Cloudflare, and Helmet.js.

Explore Alibaba Cloud's DevOps ecosystem — ECS compute, ACK Kubernetes, OSS storage, and why it matters for teams operating in China and Asia-Pacific.

Use dynamic inventories to automatically discover and manage cloud infrastructure — AWS EC2, Azure VMs, and GCP instances with Ansible inventory plugins.

Learn Ansible from scratch — install Ansible, write your first playbook, understand modules, manage inventories, and automate server configuration.

Structure your Ansible automation with roles for reusability. Learn role directory structure, Galaxy usage, dependencies, and testing with Molecule.

Encrypt sensitive data with Ansible Vault — encrypt files, inline variables, multi-password setups, and integrate with external secret managers like HashiCorp Vault.

Integrate Nexus and Artifactory with Jenkins, GitHub Actions, and GitLab CI — push artifacts, pull dependencies, and implement promotion workflows.

Navigate the essential AWS building blocks — EC2, S3, VPC, IAM, RDS, Lambda, and EKS explained for DevOps engineers with practical examples.

Understand Azure's essential services — VMs, Storage, VNets, Azure AD (Entra ID), AKS, App Service, and Azure DevOps for infrastructure automation.

Deploy Envoy as an edge proxy and sidecar for microservices — listeners, clusters, routes, circuit breaking, retries, and observability features.

Learn GCP's core services — Compute Engine, GKE, Cloud Storage, VPC, IAM, Cloud Build, and Cloud Run for modern DevOps workflows.

Configure HAProxy for HTTP and TCP load balancing — installation, frontends, backends, health checks, ACLs, SSL termination, and the stats dashboard.

Install Istio on Kubernetes, understand the control plane architecture, deploy your first sidecar proxy, and configure namespace injection.

Enable mutual TLS in Istio, configure PeerAuthentication and AuthorizationPolicy, and secure service-to-service communication with zero-trust principles.

Leverage Istio's built-in observability — Kiali service graph, Jaeger distributed tracing, Prometheus metrics, and Grafana dashboards for your service mesh.

Configure Istio VirtualServices, DestinationRules, and Gateways for advanced traffic routing, canary deployments, fault injection, and circuit breaking.

Master Jenkins declarative pipelines — stages, steps, post actions, environment variables, credentials, parallel execution, and when conditions.

Run Jenkins pipeline stages inside Docker containers for clean, reproducible builds — agent configuration, custom images, Docker-in-Docker, and Kaniko alternatives.

Install Jenkins on Ubuntu and Docker, configure security settings, manage plugins, and create your first freestyle and pipeline jobs step by step.

Build and maintain Jenkins shared libraries — directory structure, global vars, custom steps, class-based libraries, testing, and versioning strategies.

Install JFrog Artifactory, configure local, remote, and virtual repositories, set up Docker registries, and manage permissions with access control.

Implement automatic failover for HAProxy and Nginx using Keepalived with VRRP — virtual IPs, health checks, and split-brain prevention.

Navigate the Linux file system hierarchy, master essential commands, understand file permissions and ownership, and work with links, pipes, and redirection.

Configure Linux network interfaces, set up iptables/nftables/firewalld rules, troubleshoot connectivity with ss, ip, dig, and tcpdump, and secure your servers.

Install, update, and manage packages across Ubuntu (apt), RHEL (dnf/yum), and SUSE (zypper) — repositories, GPG keys, version pinning, and automation.

Diagnose Linux performance bottlenecks with top, htop, vmstat, iostat, sar, iotop, and strace — a systematic approach to finding and fixing issues.

Write effective Bash scripts for DevOps automation — variables, conditionals, loops, functions, error handling, argument parsing, and real-world script patterns.

Manage Linux services with systemctl, write custom unit files, understand the boot process, configure targets, and use journalctl for log analysis.

Create and manage Linux users and groups, configure sudo access, understand /etc/passwd and /etc/shadow, and implement PAM authentication policies.

Deploy Nexus Repository Manager, configure hosted and proxy repositories for Docker, npm, Maven, and PyPI, and set up cleanup policies and access control.

Set up Nginx as a reverse proxy with SSL termination, response caching, rate limiting, and load balancing for high-traffic applications.

Generate short-lived database credentials, AWS IAM roles, and PKI certificates with Vault dynamic secrets — eliminating long-lived credentials from your infrastructure.

Install HashiCorp Vault, understand seal/unseal mechanics, configure secret engines, and store your first secrets with policies and authentication methods.

Inject HashiCorp Vault secrets into Kubernetes pods using the Agent Injector and CSI provider — with practical examples for database credentials and TLS certificates.

Deploy Vault for production — HA with Raft storage, auto-unseal with cloud KMS, audit logging, performance tuning, backup strategies, and disaster recovery.

Configure ArgoCD Image Updater to automatically detect and deploy new container images to Kubernetes without manual manifest changes or CI triggers.

Cut your AWS Lambda costs by 40-70% with memory right-sizing, ARM/Graviton migration, and smart provisioned concurrency strategies.

How to set up Spotify's Backstage as a developer portal — software catalog, templates, and TechDocs for platform teams that want to scale.

Set up automated cloud cost anomaly detection with AWS Cost Anomaly Detection and custom Lambda monitors to catch runaway spend early.

How to use Crossplane to provision and manage cloud infrastructure using Kubernetes-native APIs — one control plane to rule them all.

Add automated dependency vulnerability scanning to your CI pipeline using Trivy and Grype. Catch known CVEs before they hit production.

Set up the pre-commit hooks framework to automatically enforce linting, formatting, and security checks before every Git commit.

Eliminate duplicated CI/CD logic across repositories using GitHub Actions reusable workflows and composite actions with real-world examples.

Harden GitHub Actions security with least-privilege permissions, OIDC federation, SHA-pinned actions, and secrets management best practices.

Deploy Kubecost for real-time Kubernetes cost monitoring with namespace-level showback, idle cost detection, and actionable Slack alerts.

A practical comparison of Kubernetes Ingress and Gateway API, with a migration strategy that won't take down your production traffic.

A deep dive into Kubernetes resource requests, limits, QoS classes, and why getting them wrong leads to OOM kills, throttling, and wasted money.

How to configure encryption at rest for Kubernetes secrets using KMS providers, because your secrets in etcd are stored in plaintext by default.

A systematic approach to debugging CrashLoopBackOff in Kubernetes, covering the most common causes and the exact commands to diagnose each one.

Deploy Grafana Loki and Promtail for cost-effective, scalable log aggregation — without indexing yourself into bankruptcy.

Design on-call rotations that protect your team from burnout — with metrics, policies, and SLO-driven improvements that actually work.

Deploy OPA Gatekeeper to enforce Kubernetes admission policies — block privileged containers, enforce labels, and prevent misconfigurations.

Deploy and configure the OpenTelemetry Collector to unify traces, metrics, and logs into a single pipeline — with production-tested patterns.

Use Prometheus recording rules to pre-compute expensive queries, speed up dashboards, and make SLO calculations reliable at scale.

A data-driven comparison of AWS Reserved Instances vs Savings Plans — with decision frameworks, break-even math, and real purchase recommendations.

Use Mozilla SOPS to encrypt secrets in Git for secure GitOps workflows. Covers AGE, AWS KMS, and ArgoCD integration with real examples.

How to write unit and integration tests for Terraform modules using Terratest — because untested infrastructure is a liability.

How to configure Kubernetes HPA with Prometheus custom metrics so your workloads scale on what actually matters — not just CPU and memory.

How to implement zero-trust networking in Kubernetes using NetworkPolicies — deny by default, allow by exception, and sleep better at night.

Find and fix oversized EC2 instances with this practical right-sizing guide. Save 30-50% on AWS compute costs using CloudWatch metrics and tooling.

Set up Trivy for container image vulnerability scanning — from local development to CI/CD pipeline integration with actionable remediation.

Essential Docker CLI commands organized by task — build images, run containers, manage volumes and networks, compose services, and debug.

Master GitHub Actions matrix builds to test across multiple OS versions, language versions, and configurations in parallel.

The kubectl quick reference — organized by task with copy-paste ready commands for pods, deployments, services, debugging, and more.

Learn everything about Kubernetes Pod Security Standards (PSS) and Pod Security Admission (PSA) — from baseline to restricted profiles with practical examples.

Design Prometheus alerting rules that catch real incidents and ignore noise — practical patterns from years of on-call experience.

Battle-tested Terraform module patterns for teams — from file structure to versioning to composition. If it's not in code, it doesn't exist.

A complete tagging strategy for cloud cost allocation — including the Terraform enforcement, AWS policies, and org-wide rollout plan that actually works.

Shrink Docker images from 1.2GB to 45MB using multi-stage builds. Production Dockerfiles for Node.js, Go, and Python with real size comparisons.

Cut your GitLab CI pipeline time from 25 minutes to 6 with smart caching, DAG dependency graphs, parallel test splitting, and stage optimization.

Practical ArgoCD patterns for managing dozens of applications — from App of Apps to ApplicationSets to multi-cluster rollouts. All in code, obviously.

Build Grafana dashboards that surface real signals instead of decorating walls — a structured approach rooted in SRE principles.

Battle-tested patterns for writing Helm charts that survive production — covering values design, template structure, lifecycle hooks, and chart testing.

A structured, blameless postmortem process with a ready-to-use template — built from real SRE incident patterns and Google SRE book principles.

Implement least-privilege RBAC in Kubernetes to prevent lateral movement and privilege escalation — with real threat models and pipeline-ready examples.

A real-world comparison of Pulumi and Terraform — where each shines, where each hurts, and how to pick the right one for your team.

A practical guide to S3 storage class selection and lifecycle policies — with real dollar figures showing how to cut storage costs by 60-80%.

Integrate HashiCorp Vault with Kubernetes to eliminate static secrets from your cluster — with working manifests, threat models, and pipeline automation.

Stop manually bumping versions. Use conventional commits and release-please to automate versioning, changelogs, and releases.

A step-by-step guide to implementing SLOs and error budgets using Prometheus — from defining SLIs to building burn-rate alerts.

A battle-tested guide to running Kubernetes workloads on spot instances — safely, reliably, and at 60-90% less than on-demand pricing.

Sign and verify your container images with Sigstore Cosign to prevent supply chain attacks — with keyless signing, SBOM attestation, and Kubernetes admission enforcement.

Everything you need to know about Terraform remote state — from setting up S3 backends with locking to workspace strategies and emergency state surgery.