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• livenessProbe: tells Kubernetes whether the container is still alive. If it fails repeatedly, Kubernetes restarts the container.
• readinessProbe: tells Kubernetes whether the container is ready to receive traffic. If it fails, the pod stays running but is removed from Service load balancing.
• startupProbe: tells Kubernetes whether the app has finished starting up. While it is still failing, Kubernetes suppresses liveness/readiness handling for slow-starting apps.

Typical behavior:

• Use livenessProbe to detect deadlocks/hung processes.
• Use readinessProbe to gate traffic until dependencies/init work are done.
• Use startupProbe when startup is slow and you don’t want liveness to kill the app too early.

Simple mental model:

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Discoverable Test Config in Go: Use Flags

Summary of rednafi.com/go/test-config-with-flags.

The article compares three ways to toggle tests in Go (snapshot, integration, real-vs-mock) and argues for custom flags.

1. Build tags — discouraged

//go:build snapshot

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Go "Shebang": Running Go Files as Scripts

Summary of lorentz.app: go-shebang by Lorentz Kinde (2025-12).

The trick

Prepend this line to a .go file, chmod +x, then run it directly:

//usr/local/go/bin/go run "$0" "$@"; exit

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In MySQL, a Virtual Column (specifically known as a Generated Column) is a column whose value is automatically calculated from an expression or other columns in the same table, rather than being explicitly inserted or updated by a user.

Think of it like a formula in an Excel spreadsheet: you define the rule once, and the database ensures the data stays in sync.

---

The Two Types of Generated Columns

MySQL offers two "flavors" of these columns, and the distinction is mostly about storage space versus CPU performance:

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Documentation Principles & Best Practices

The primary goal of documentation is to reduce friction for the reader. While the best starting point is simply ensuring a README.md exists, adhering to the following pillars will significantly improve the quality and longevity of your technical writing.

1. Prioritize Brevity and Professionalism

• Be Concise: Value the reader’s time. Use AI as a tool to trim wordy explanations and get straight to the point.
• Maintain an Even Tone: Avoid letting personal frustrations or over-enthusiasm color the technical content. Aim for a "neutral-expert" voice that remains consistent from start to finish.

2. Eliminate Assumptions

• Define Your Terms: Never assume a concept is "common knowledge."
• External Context: Use hyperlinks to Wikipedia or official documentation for industry terms, protocols, or third-party tools to ensure readers of all levels can follow along.

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// This code demonstrates how you can embed a type,
// and have it satisfy an interface (`ProblemDetailer`)
// but only for the embedded type.
// This works because the interface uses an unexported method,
// that is part of the embedded type's package.
// https://go.dev/play/p/7lbikIyPHi1
//
// IMPORTANT: If the `isProblem` inteface method was exported (i.e `IsProblem`),
//            then our `Fake` struct would pass the `.(errorsx.ProblemDetailer)` type assertion
//            e.g. https://go.dev/play/p/pPD3OgtiyHx

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🚀 MySQL EXPLAIN: The Ultimate Performance Guide

Database optimization can feel like a dark art, but the EXPLAIN command is your "Matrix vision." It reveals how MySQL plans to execute your query before you run it.

---

1. The Starting Line: Slow Query Log

You can't fix what you can't find. Use the Slow Query Log to catch queries that exceed a specific time threshold.

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Prometheus Metric Types: A Quick Reference

This guide explains the four core Prometheus metric types, including common "patterns" that might seem counter-intuitive at first glance.

1. Counter

Definition: A cumulative metric that represents a single monotonically increasing counter. Its value can only increase or be reset to zero on restart.

• Best for: "How many times has X happened?"
• Examples: Total HTTP requests, total errors, bytes received.

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https://www.w3schools.com/tags/ref_urlencode.ASP

" %22
, %2C
: %3A
= %3D
\ %5C
[ %5B
] %5D

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// First complete match wins. 
// Because exact children are tried before `*` which is tried before `**`. 
// The most-specific rule wins without an explicit priority sort.
package redirect

import (
	"fmt"
	"strings"
)