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.
GCP Cloud Run Container Startup Timeout Debugging Guide
A practical guide to diagnosing and fixing container startup timeouts in Google Cloud Run, covering resource limits, health checks, and cold start optimization.
GCP Pub/Sub Subscription Backlog Growing: Diagnosis and Fix
A practical guide to diagnosing and resolving growing backlogs in GCP Pub/Sub subscriptions, covering common causes like slow subscribers, ack deadlines, and throughput misconfigurations.
GCP Cloud Functions Deployment Error: Region Mismatch and Build Permissions
A comprehensive guide to diagnosing and fixing GCP Cloud Functions deployment failures caused by region mismatches, missing IAM roles, and build service account misconfigurations.
Terraform State Drift: Resource Changed Outside Terraform
A practical guide to detecting, diagnosing, and fixing Terraform state drift caused by changes made outside of Terraform.
Terraform Provider Version Conflict: How to Diagnose and Resolve
A practical guide to diagnosing and fixing Terraform provider version conflicts, including explicit version constraints, lockfile mismatches, and registry issues.
Debugging CloudFormation Stack Rollback: Finding the Real Reason
Stop guessing why your CloudFormation stack rolled back. This guide shows you how to find the real reason using AWS CLI, CloudTrail, and stack policies.
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.