Latest Blogs
Tutorials, guides, and insights on DevOps, SRE, and Cloud technologies.
Observability vs Monitoring — Distributed Tracing with Jaeger and OpenTelemetry
Understand the difference between monitoring and observability, the three pillars of observability, and how to implement distributed tracing with OpenTelemetry and Jaeger.
Docker Init Systems — PID 1, Signal Handling, and Zombie Processes
Understand the PID 1 problem in Docker containers — why your app ignores SIGTERM, how zombie processes accumulate, and how to fix it with tini, dumb-init, exec form ENTRYPOINT, and graceful shutdown patterns for Node.js, Python, Go, and Java.
Kubernetes Troubleshooting — CrashLoopBackOff, ImagePullBackOff, and Pending Pods
Master Kubernetes troubleshooting with a systematic approach to the most common pod failures. Covers CrashLoopBackOff, ImagePullBackOff, Pending pods, OOMKilled, node issues, service debugging, ephemeral containers, and network problems with practical kubectl commands for each scenario.
Linux Server Hardening Checklist — 20 Steps to Secure Your Server
A battle-tested 20-step Linux server hardening checklist covering SSH lockdown, fail2ban, automatic updates, audit logging, kernel hardening, and CIS benchmark compliance.
Terraform State Surgery — Move, Remove, and Recover State
Master Terraform state surgery — move resources between modules, remove items without destroying them, recover corrupted state from backups, and use moved blocks for safe refactoring without downtime.
Secrets Manager vs Parameter Store vs Vault — Secure Your Secrets on AWS
Compare AWS Secrets Manager, Systems Manager Parameter Store, and HashiCorp Vault for secret management. Learn automatic rotation, cross-account access, RDS integration, Lambda rotation functions, and SDK examples for EC2, Lambda, and ECS.
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