Docker tutorial - IT technology blog
Posted inDocker

Dockerize Elixir Phoenix: Multi-stage Build, OTP Releases, and Production-Ready Erlang Clustering

A detailed guide to Dockerizing Elixir Phoenix with an optimized multi-stage build that reduces image size from 1.2GB to 85MB, production-ready OTP Releases configuration, and automatic Erlang clustering via libcluster DNS in Docker Compose. Includes a real-world Dockerfile, clustering configuration, and a deploy script with safe database migrations.
Docker tutorial - IT technology blog
Posted inDocker

Advanced Docker Swarm: Rolling Updates, Placement Constraints, and Zero-Downtime Deployments

A detailed guide to configuring Docker Swarm for production: zero-downtime Rolling Updates with order: start-first, Placement Constraints for proper workload distribution, and Docker Config/Secret for secure configuration management. Written for those who already know Swarm basics and want to level up to a real production environment without deployment downtime.
Docker tutorial - IT technology blog
Posted inDocker

Configuring Docker Compose Overrides for Multiple Environments: Effectively Separating Dev, Staging, and Production

Managing Docker applications across development, testing, and production environments often presents many challenges. Instead of duplicating configurations or using complex environment variables, Docker Compose Override offers an effective solution for separating configurations, saving resources, and simplifying the deployment process.