Caching in Kubernetes Ingress Caching is a key strategy to reduce backend load and improve response times for clients. In Kubernetes, caching is usually implemented through the Ingress controller — particularly with NGINX. Why Use Caching? Reduce load on backend services Improve speed for repeated requests Minimize cost and bandwidth Smooth handling of traffic spikes Common Caching Setup: NGINX Ingress The NGINX Ingress Controller supports proxy caching via annotations. Step 1: Enable caching in your Ingress resource apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: my-app-ingress annotations: nginx.ingress.kubernetes.io/proxy-cache: "my-cache-zone" nginx.ingress.kubernetes.io/proxy-cache-key: "$scheme$request_method$host$request_uri" nginx.ingress.kubernetes.io/proxy-cache-use-stale: "error timeout updating http_500 http_502 http_503 http_504" spec: rules: - host: myapp.example.com http: paths: - path: / pathType: Prefix backend: service: name: my-app port: number: 80 Step 2: Define the cache zone in the NGINX ConfigMap apiVersion: v1 kind: ConfigMap metadata: name: nginx-configuration namespace: ingress-nginx data: proxy-cache-paths: | my-cache-zone keys_zone=my-cache-zone:10m max_size=100m inactive=60m use_temp_path=off; ⚠️ Requires restarting the Ingress controller or reloading its config. ...

Introduction Containers revolutionized the way we package and deploy applications. Two major containerization technologies are LXC (Linux Containers) and Docker. While they serve similar purposes, their underlying architecture and usage differ significantly. What is LXC? LXC is a userspace interface for the Linux kernel containment features. It creates system-level containers that behave more like lightweight virtual machines. Key Characteristics System containers (can run full OS) Uses cgroups and namespaces directly Close to the kernel Pros Great for simulating full Linux environments Low overhead Flexible networking Cons More complex setup Less standardization across environments Not focused on developer UX What is Docker? Docker is a platform for developing, shipping, and running applications in containers. It builds on top of container runtimes and provides tooling, APIs, and images. ...

Overview Ruby is a dynamic, expressive language with a strong history in web development. Several frameworks have emerged over the years, offering different trade-offs for speed, flexibility, and structure. In this article, we’ll explore the most popular Ruby web frameworks and help you choose the right one for your project. 1. Ruby on Rails The most popular and full-featured Ruby framework. Pros: Convention over configuration Built-in ORM (ActiveRecord), migrations, mailers, etc. Large community and ecosystem Cons: Heavy for small applications Learning curve for beginners Example: # config/routes.rb Rails.application.routes.draw do get '/hello', to: 'welcome#index' end # app/controllers/welcome_controller.rb class WelcomeController < ApplicationController def index render plain: "Hello from Rails!" end end 2. Sinatra A lightweight DSL for quickly creating web applications. ...

Introduction to HTTP HTTP (HyperText Transfer Protocol) is the foundation of data communication on the web. It’s a client-server protocol used for fetching resources such as HTML documents, images, and APIs. HTTP Versions Overview HTTP/1.1 Released in 1997 Supports persistent connections (keep-alive) Still widely used Limitation: Head-of-line blocking HTTP/2 Binary protocol introduced in 2015 Multiplexing: Multiple streams over a single TCP connection Header compression (HPACK) Server push (optional) Faster than HTTP/1.1 HTTP/3 Uses QUIC instead of TCP Built-in encryption (TLS 1.3 only) Better performance on lossy networks Fully multiplexed, no head-of-line blocking WebSockets WebSockets provide a full-duplex communication channel over a single TCP connection. ...

Introduction: What is Helm? Imagine if you had a package manager for Kubernetes, just like apt or yum for Linux. That’s Helm. Helm helps you manage Kubernetes applications — think of it as the Yum/Apt for Kubernetes. With Helm, you don’t have to manually write all the YAML manifests. Instead, you use or create a Chart (a packaged app), and Helm will take care of the rest. Why Use Helm? 💡 Simplifies complex deployments ⚙️ Helps manage versions and rollbacks 🔁 Enables reproducible builds and upgrades 📦 Reuses templates to avoid duplication How Helm Works Helm uses: ...