Discusses how to run PostgreSQL on Kubernetes, backed by OpenEBS storage, with Istio routing.

Prometheus is a popular tool for metrics ingestion and querying. In this post, we discuss some of its features, using PromQL for querying, and using Prometheus with Grafana for visualizations and Alertmanager for alerting.

jq is a power tool for working with JSON on the command-line. In this post, we discuss using it to filter and transform data and work with various data sources like awscli and Elasticsearch.

While Grafana’s default database is SQLite, moving to a PostgreSQL database is the first step in making Grafana highly available. This post discusses using pgloader to make this migration easier.

This articles show how to use it to implement a Polish notation parser in JavaScript using Test-driven Development (TDD).

A common way for children’s apps to teach letters is to have someone draw the letter, the app tracking the user’s drawing. We start with this concept and implement piecewise. Along the way, we use unit tests, SwiftCheck, Cocoapods, fastlane, and CI providers to improve the project.

This article describes the configuration management tool Ansible and some of its basic concepts. Then it discusses how to test Ansible code. Refer to the version chart below. It assumes familiarity with the concept of configuration management, programming, and testing.