DevOps Archives - Page 63 of 63 - ITFROMZERO

MySQL Master-Slave Replication Setup: From Real Incidents to Solutions

By IT From Zero March 1, 2026

A complete guide to MySQL Master-Slave Replication from start to finish, solving database overload and single point of failure. Covers each step from configuring Binary Log and creating the replication user to connecting and verifying the Slave.

Virtualization

How to Use Vagrant for a Consistent Dev Environment — No More ‘Works on My Machine’

By IT From Zero March 1, 2026

Vagrant standardizes dev environments with a Vagrantfile committed to git — putting an end to the 'works on my machine' problem. This article compares manual VMs, Docker, and Vagrant, analyzes when to use each, and provides a step-by-step setup guide from a single VM to a multi-machine production simulation.

Docker

Deploying Node.js with Docker: Tips & Tricks from Real-World Experience

By IT From Zero March 1, 2026

Real-world experience deploying Node.js apps with Docker the right way: avoiding bloated images, handling graceful shutdown, managing environment variables securely, and configuring health checks for production.

Docker

Install Portainer to Manage Docker via UI — No More Memorizing Commands, No More Mistakes

By IT From Zero February 28, 2026

Managing Docker via CLI every day is time-consuming and error-prone as your container count grows. This guide walks you through installing Portainer CE with Docker Compose v2, basic security configuration, and practical tips for more effective container management via the web interface.

Database

Optimizing PostgreSQL Performance with PgBouncer: Connection Pooling in Production

By IT From Zero February 28, 2026

A guide to installing and configuring PgBouncer to address connection overhead in PostgreSQL. Real-world experience after 6 months in production: server connections reduced from 180 to 25, API response time improved from 800ms to under 300ms.

Docker

Docker Swarm Basics: A Complete Guide to Deploying Container Clusters from A to Z

By IT From Zero February 28, 2026

Docker Swarm frees you from the single-host trap: automatically distributes containers, scales with a single command, and performs zero-downtime rolling updates. This guide walks from a real-world problem to a fully working cluster setup, step by step.

Network

Setting Up a DNS Server with Bind9 on Ubuntu/Debian

By IT From Zero February 28, 2026

A step-by-step guide to setting up an internal DNS server with Bind9 on Ubuntu/Debian: installation, forward and reverse zone files, forwarder and ACL configuration, testing, and troubleshooting. Written from real-world experience managing an office network.

Database

Getting Started with Redis: Installation and Basic Usage — From 2 AM Production Crisis to Proficiency

By IT From Zero February 28, 2026

When a Django server starts timing out under heavy traffic, the culprit is often a database overwhelmed by repeated identical queries. This guide covers installing Redis on Linux, the essential commands you need to know, and how to integrate a cache layer into Python to immediately reduce database load.

Linux

How to Use tmux: Managing Multiple Terminals and Keeping Sessions Alive When SSH Drops

By IT From Zero February 28, 2026

tmux is a terminal multiplexer that lets you manage multiple terminals within a single SSH window and keep sessions alive even after losing your connection. This guide covers installation, essential shortcuts, and practical workflows for developers working with Linux servers.