Articles

Welcome to the articles section, where business, technology, and everyday problem-solving meet. You’ll find practical how-tos, troubleshooting notes from the trenches, and the occasional take on whatever’s happening in the world. Some posts will save you time, some will spark ideas, and a few will just be me thinking out loud. Grab a coffee and dig in.

June 18, 2025

Understanding Machine CPU Usage

A practical walkthrough of reading node_cpu_seconds_total from the Prometheus Node exporter, calculating per-second rates, and deriving overall CPU utilization percentages across multiple machines.

May 29, 2025

An Introductory How-To, With Examples, of Docker Exec

A practical guide to the docker exec command, covering background execution, environment variables, interactive sessions, and working directory control. Includes real-world examples to help you get the most out of running commands inside containers.

May 29, 2025

Kubernetes Cluster Components

An overview of the key components that make up a Kubernetes cluster, covering both the control plane and worker nodes. Understanding these pieces is essential for operating and troubleshooting a Kubernetes environment.

May 29, 2025

Kubernetes Deployment Scheduler Sequence

A time sequence diagram walks through the sequential steps of pod scheduling in Kubernetes, from the initial kubectl command to the kubelet reporting status back to the API server. The diagram simplifies concurrent control plane and worker node processes into a clear, ordered flow.

May 19, 2025

Java TLS Client Debugging

A guide to inspecting SSL/TLS handshakes in Java applications when built-in debugging is unavailable. Includes a lightweight TLS client tool for testing certificate and handshake issues.

May 14, 2025

Basic Kerberos Test Class in Java

A minimal Java class and JAAS configuration for testing Kerberos authentication in isolation, useful when application-level debugging is too noisy to isolate the problem.