Buglyst Blog
Learn to debug under pressure.
Playbooks for fast pattern recognition, guides for the full investigation, and articles for the engineering judgment around the edges.
17 playbooks · 509 guides · 95 articles · 12 linked practice labs ·skip to practice
Fast pattern recognition for the production failures engineers see most often.
2 playbooks in Infrastructure & Cloud
Debugging Env Var Issues
A concise checklist for incidents where local works but CI, staging, or production changes behavior.
Debugging Deployment Config Bugs
How to debug incidents where the source is deployment wiring rather than application logic.
Structured investigations for the failure modes engineers meet in real systems.
Debugging Kubernetes Resource Quota Exceeded
A practical guide for diagnosing and fixing Kubernetes resource quota exceeded errors, covering common causes and verification steps.
Debugging Kubernetes Init Containers That Never Complete
A field-tested guide to diagnosing and fixing init containers that hang, crash, or silently fail in Kubernetes.
Debugging Missing Artifacts in Docker Multi-Stage Builds
When a Docker multi-stage build produces a smaller final image but the expected binary or file is not present, the cause is often a copy-from mistake or builder stage mislabeling.
Docker Build Cache Invalidation: Why Your Builds Are Slow
A practical guide to debugging slow Docker builds caused by cache invalidation. Covers common pitfalls like COPY order, build args, and layer reuse.
Docker Permission Denied When Running a Container
A step-by-step guide to diagnosing and fixing 'permission denied' errors when executing docker run, including file permissions, user namespaces, and SELinux.
Docker Volume Mount Not Showing Files: A Practical Debugging Guide
A hands-on guide to diagnosing Docker volume mounts that appear empty or fail to sync files, with real commands and common pitfalls.
Long-form thinking on debugging habits, observability, and the systems around the bug.
Chaos Engineering at 3 AM: When Our Kubernetes Cluster Lost Its DNS
We ran a chaos experiment on our Kubernetes cluster and found a subtle DNS misconfiguration that would have caused a cascading failure. Here's how we did it and what we learned.
Debugging Inside Docker Containers: Tools, Techniques, and a War Story
Practical techniques for debugging inside Docker containers: exec, nsenter, strace, and a real incident that made me rethink debug images.
kubectl logs: Debugging Pods with Logs, Timestamps, and Previous Instances
Beyond `kubectl logs pod-name` — using timestamps, previous instances, and multi-container patterns to diagnose real failures.
Debugging Serverless Functions Locally: A Practical Approach
Local debugging of serverless functions requires different tools and mindset than traditional apps. Here's how I approach it with real examples.
Debugging Terraform and CloudFormation Errors: A Field Guide to the 3 AM Page
Infrastructure-as-code errors are inevitable. Here's how to systematically debug Terraform and CloudFormation failures without losing your mind.