Notes
Technical notes by Hamed Hadi on CI/CD, Docker, cloud infrastructure, and DevOps.
The night docker-compose took production down
A wrong volume, an unintended restart, and what I learned about backups and health checks — a real production story.
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How I made GitHub Actions builds 80% faster with caching
Hands-on pipeline tuning: layer cache, dependency cache, and a common mistake that wasted team time.
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Rollback after a deploy that broke everything
No feature flags, 45 minutes of manual rollback — why I changed our release strategy that day.
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My first week with Kubernetes: what nobody tells you
From endless YAML to understanding Deployment vs StatefulSet — honest notes from a relative newcomer.
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The day SSL expired and Nginx stayed silent
Broken certbot cron, no monitoring alert — a painful lesson on certificate automation and expiry.
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When alerts killed the team's trust
Hundreds of alerts per week, all ignored — how we changed thresholds and didn't miss the real incident.
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