Practical platform engineering notes

DevOps Information Hub

A concise guide to the practices that connect software delivery with reliable operations: automation, infrastructure as code, CI/CD, Kubernetes, observability, and security.

Explore topics Use the checklist

$ git push origin main
✓ tests passed
✓ image built and scanned
✓ manifests rendered
✓ deployment synced
✓ service observed

Result: small, repeatable changes
with fast feedback and clear ownership.

Core foundations

DevOps works best when teams turn operational knowledge into versioned, reviewable, automated systems.

Infrastructure as Code

Define infrastructure in source control so environments are reproducible, reviewable, and safer to change.

TerraformOpenTofuAnsible

Containers

Package applications with their runtime dependencies, then deploy the same artifact through every stage.

DockerfileOCI imagesRegistries

Source control

Use branches, commits, pull requests, and tags as the audit trail for platform and application changes.

GitReviewsReleases

Delivery pipeline

A healthy CI/CD pipeline catches problems early and makes deploys boring.

Continuous Integration

Run tests on every change.
Build immutable artifacts once.
Fail fast with readable logs.

Continuous Delivery

Promote known-good artifacts.
Use rollout strategies and health checks.
Keep rollback paths simple.

GitOps

Store desired state in Git.
Let controllers reconcile drift.
Track sync and health continuously.

Reliable operations

Reliability depends on visibility, security, capacity planning, and incident learning loops.

Observability

Collect metrics, logs, and traces that explain user impact and system behavior.

Security

Shift left with dependency scanning, least privilege, secret management, and policy checks.

Incident response

Define ownership, alerts, runbooks, escalation paths, and blameless post-incident reviews.

DevOps readiness checklist

Use these questions to assess whether a service is ready for production.

Build: Can the app be built from a clean checkout with one command?
Test: Are unit, integration, and smoke tests part of the pipeline?
Deploy: Are manifests versioned and applied by automation?
Observe: Are dashboards and alerts tied to user-facing symptoms?
Secure: Are secrets externalized and permissions scoped narrowly?
Recover: Is rollback, backup, and disaster recovery documented?

Operating principle

Automate the repeatable. Document the surprising. Measure what users feel.

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