Tech-Gen

  Kubernetes layers you need to know as a Cloud DevOps Engineer K8s applications aren’t just about containers ~ they’re about the EXTRA layers that make them enterprise-ready. 1. Load Balancer: → This is the entry point to your architecture. → It distributes incoming network traffic across backend servers & pods. → Ensures high availability and fault tolerance. → Prevents any single pod from being overwhelmed by load. 2. Ingress Controller & Gateway API: → Ingress acts as the HTTP/S gateway managing external access to services within the cluster. → The new Gateway API goes a step further — supporting multiple protocols (HTTP, TCP, gRPC), role-based delegation, and better extensibility. → Together, they help unify traffic control across internal and external systems - a must for modern, multi-tenant architectures. 3. Kube Proxy: → Maintains network rules and forwards traffic between pods and services. → Handles communication consistency even as pods scale up or down. 4. Side...

  Kubernetes Service: Routing Traffic Inside and Outside the Cluster In modern distributed systems, Kubernetes has become the de facto operating model for cloud-native workloads. Yet one of its most overlooked strengths is how it abstracts networking — enabling applications to communicate seamlessly inside and outside the cluster. As a Solution Architect, I often find that understanding how traffic is routed defines the reliability, scalability, and observability of the entire platform. At its core, a Kubernetes Service acts as a stable entry point that load-balances requests to dynamic sets of Pods. Behind the scenes, kube-proxy or an eBPF-based data plane programs the network layer so traffic to a Service IP is transparently distributed across healthy endpoints. This abstraction allows developers to focus on the application, while architects focus on connectivity, policy, and performance. Inside the cluster, we typically rely on ClusterIP Services to enable Pod-to-Pod communicati...

 When we run apps on Kubernetes, it’s not just about containers. There are several 𝐥𝐚𝐲𝐞𝐫𝐬 that make sure your application is reliable, secure, and works well in production. Let’s understand each layer👇 1️⃣ 𝐋𝐨𝐚𝐝 𝐁𝐚𝐥𝐚𝐧𝐜𝐞𝐫 This is like the 𝐦𝐚𝐢𝐧 𝐞𝐧𝐭𝐫𝐲 𝐠𝐚𝐭𝐞 to your app. It takes incoming user requests and 𝐬𝐡𝐚𝐫𝐞𝐬 𝐭𝐡𝐞𝐦 𝐚𝐜𝐫𝐨𝐬𝐬 𝐦𝐮𝐥𝐭𝐢𝐩𝐥𝐞 𝐩𝐨𝐝𝐬 𝐨𝐫 𝐬𝐞𝐫𝐯𝐞𝐫𝐬, so one pod doesn’t get overloaded. It keeps your app 𝐚𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐚𝐧𝐝 𝐬𝐦𝐨𝐨𝐭𝐡 even when traffic increases. 2️⃣ 𝐈𝐧𝐠𝐫𝐞𝐬𝐬 𝐂𝐨𝐧𝐭𝐫𝐨𝐥𝐥𝐞𝐫 & 𝐆𝐚𝐭𝐞𝐰𝐚𝐲 𝐀𝐏𝐈 These control 𝐡𝐨𝐰 𝐮𝐬𝐞𝐫𝐬 𝐨𝐮𝐭𝐬𝐢𝐝𝐞 𝐲𝐨𝐮𝐫 𝐜𝐥𝐮𝐬𝐭𝐞𝐫 𝐫𝐞𝐚𝐜𝐡 𝐲𝐨𝐮𝐫 𝐬𝐞𝐫𝐯𝐢𝐜𝐞𝐬 𝐢𝐧𝐬𝐢𝐝𝐞. 👉Ingress handles web traffic (HTTP/HTTPS). 👉The newer Gateway API is more powerful — it supports extra protocols (like TCP, gRPC) and lets you define routes more clearly. Together, they help 𝐦𝐚𝐧𝐚𝐠𝐞 𝐚𝐧𝐝 𝐬𝐞𝐜𝐮𝐫𝐞 𝐭𝐫𝐚𝐟𝐟𝐢𝐜 across internal and external...

  Kubernetes Architecture & Components Overview Kubernetes (K8s) is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications. It follows a master-worker node architecture for control and execution. Core Architecture Kubernetes architecture consists of two main layers: ✓ Control Plane (Master Node) – Manages and controls the entire cluster. ✓ Worker Nodes – Execute workloads and run containerized applications (Pods). Control Plane Components 1. API Server ✓ Central access point for all Kubernetes components. ✓ Exposes the Kubernetes API to handle REST requests. ✓ Validates and processes commands from kubectl and other components. 2. etcd ✓ A distributed key-value store maintaining cluster configuration and state. ✓ Ensures high availability and consistency of cluster data. ✓ Used as the single source of truth for all cluster information. 3. Controller Manager ✓ Runs background controller...

  Linux command that you should know while working in linux based system: • ps aux | grep {process} - Find that sneaky process • lsof -i :{port} - Who's hogging that port? • df -h - The classic "we're out of space" checker • netstat -tulpn - Network connection detective • kubectl get pods | grep -i error - K8s trouble finder Log related commands: • tail -f /var/log/* - Real-time log watcher • journalctl -fu service-name - SystemD log stalker • grep -r "error" . - The error hunter • zcat access.log.gz | grep "500" - Compressed log ninja • less +F - The better tail command Container cli: • docker ps --format '{{.Names}} {{.Status}}' - Clean status check • docker stats --no-stream - Quick resource check • crictl logs {container} - Raw container stories • docker exec -it - The container backdoor • podman top - Process peek inside containers System Detectives: • htop - System resource storyteller • iostat -xz 1 - Disk performance poet • free -h ...