Jun Tech Blog

Discover interesting articles and insights

Native Kubernetes Resources: Everything You Need to Know
Technology
Nov 8, 2025
7 min read

Native Kubernetes Resources: Everything You Need to Know

If you’ve ever wondered “_What resources come built into Kubernetes?_” or found yourself confused about which resources require additional installations, you’re...

By Jun Nguyen

Kubernetes
Debugging Kubernetes CrashLoopBackOff: A Deep Dive into Redis Eviction Policies
Technology
Oct 19, 2025
13 min read

Debugging Kubernetes CrashLoopBackOff: A Deep Dive into Redis Eviction Policies

> TL;DR: Your pod is crashing because it’s refusing to start with an unsafe Redis configuration. This article explains why that’s actually good design and how t...

By Jun Nguyen

Redis
Postgres DB v14 → v18 Migration Guideline
Technology
Oct 18, 2025
5 min read

Postgres DB v14 → v18 Migration Guideline

This article provides a comprehensive, step-by-step plan for upgrading your PostgreSQL database from version 14 to 18. It addresses the specifics of your enviro...

By Jun Nguyen

Database
Postgres
GKE Service Account Setup guideline
Technology
Oct 12, 2025
4 min read

GKE Service Account Setup guideline

## Overview

By Jun Nguyen

GCP
GKE
Kustomize for beginner
Technology
Sep 16, 2025
3 min read

Kustomize for beginner

Kustomize is a tool that helps you manage different versions of your Kubernetes configuration (YAML) files for different environments, such as development, stag...

By Jun Nguyen

Productivity
UUID and KSUID in comparison
Technology
Aug 15, 2025
3 min read

UUID and KSUID in comparison

**KSUID**, **UUIDv4**, and **UUIDv7** all provide decentralized unique identifiers, but they optimize for different properties: entropy source, sortability, pri...

By Jun Nguyen

OPFS
Technology
Jul 13, 2025
4 min read

OPFS

### What Is OPFS?

By Jun Nguyen

JSON and NDJSON
Technology
Jul 12, 2025
2 min read

JSON and NDJSON

**NDJSON** (Newline Delimited JSON, also called JSON Lines or LDJSON) is a format where **each line is a valid, standalone JSON object**, separated by newline c...

By Jun Nguyen