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Anusha KothaAug 9 · 6 min read

How to Upgrade a Kubernetes Cluster Without Downtime: A Complete Beginner's Guide (Part 1)

Introduction Imagine you're working as a DevOps Engineer in a company that runs an e-commerce application on Kubernetes. Everything is working perfectly until one day the Kubernetes team announces a n

cloudtalkswithanusha.hashnode.dev

HugoJul 27 · 4 min read

Proxmox SDN: Software-Defined Networking for Multi-Node Clusters

I got the call at 2:47 AM. A junior admin had deleted a VNet while five production VMs were running. All of them dropped off the network simultaneously. The /etc/pve/sdn/ directory had no backups. We

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Amir KolahiJul 2 · 21 min read

Ceph Storage Cluster — From Concepts to a Working Application

A complete, hands-on reference covering Ceph architecture, a 3-node cluster deployment with cephadm, object (RGW/S3) and block (RBD) storage, and a containerized application that consumes both. Enviro

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Olujimi David T.Jun 8 · 8 min read

Redis ACLs: Why a Private Network Isn’t Enough

Placing Redis inside a private network is a common first step, but it only controls who can reach Redis, not what they can do once they get there. By default, Redis requires no authentication and list

redis-simple-until-production.hashnode.dev

Ajay BhakarJun 3 · 4 min read

Kubernetes for Beginners: A Complete Guide

Have you ever wondered how companies like Netflix, Spotify, Amazon, or Google keep their applications running smoothly for millions of users every day? Imagine thousands of people streaming movies, sh

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Gabriel GonzalezJun 1 · 5 min read

Proxmox Clustering

Overview The Proxmox VE cluster manager, pvecm, is a tool to create a group of physical servers. Such a group is called a cluster. We use the Corosync Cluster Engine for reliable group communication.

beyondbaremetal.hashnode.dev

Alex ChernyshMay 11 · 8 min read

Shipping the orchestrator onto someone else's box

This is the on-prem / regulated-deployment notes for 1.10 — mTLS cluster mode, signed lineage records, air-gapped install, a capability gate against the lethal-trifecta exfiltration class. If you're looking for "how to install it on my laptop," that'...

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Hema Sundharam KollaApr 1 · 6 min read

🚀 Kubernetes Debugging Deep Dive: From “Metrics API Not Available” to Fully Working HPA (Step-by-Step Real Troubleshooting)

If you’ve ever tried setting up Metrics Server + HPA (Horizontal Pod Autoscaler) and got stuck with errors like: error: Metrics API not available cpu: <unknown>/5% False (MissingEndpoints) CrashLoopBa

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Debasish MahatoMar 25 · 1 min read

Essential Commands to Verify Linux Pacemaker Cluster System Health

This quick reference lists essential commands to verify the health of a Pacemaker-based Linux cluster. It’s written for sysadmins and SREs who need fast, reliable checks — covering system information

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Ifeanyi EzeriohaMar 19 · 23 min read

Clustering, NLP, and Dimensionality Reduction: When Your Data Has Stories to Tell

Week 19 of my data science internship at DataraFlow was the most conceptually diverse week yet; three entirely different problem domains in a single notebook, each requiring a completely different men

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How to Upgrade a Kubernetes Cluster Without Downtime: A Complete Beginner's Guide (Part 1)

Proxmox SDN: Software-Defined Networking for Multi-Node Clusters

Ceph Storage Cluster — From Concepts to a Working Application

Redis ACLs: Why a Private Network Isn’t Enough

Kubernetes for Beginners: A Complete Guide

Proxmox Clustering

Shipping the orchestrator onto someone else's box

🚀 Kubernetes Debugging Deep Dive: From “Metrics API Not Available” to Fully Working HPA (Step-by-Step Real Troubleshooting)

Essential Commands to Verify Linux Pacemaker Cluster System Health

Clustering, NLP, and Dimensionality Reduction: When Your Data Has Stories to Tell