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Docker Concepts

Step-by-step explanations, real-world issues, and simplified understanding. Master every angle — from foundational concepts to real-world troubleshooting.

What we cover

Docker Compose Fundamentals — Defining Multi-Container ApplicationsDocker Volumes and Persistent Storage — Volumes, Bind Mounts, and tmpfsDocker Compose for Local Development — Full Stack in One CommandDocker Compose Health Checks and Dependency OrderingDocker Compose in CI/CD Pipelines — GitHub Actions IntegrationDocker Compose Production Patterns — Restart Policies, Resource Limits, and Env ConfigDocker CI/CD Pipeline — Build, Scan, Push, and Deploy with GitHub Actions

7 Subtopics

Interactive guides & progressions

2 Articles

In-depth technical readings

44 Glossary Terms

Platform terminology defined

3 FAQs

Common questions answered

Docker Compose and Multi-Container Applications

Complete overview mapping DevOps concepts for Docker Compose and Multi-Container Applications.

A real application is never just one container. The Swiggy delivery API has an application server, a PostgreSQL database, a Redis cache, a message queue, and a background worker — all running together. Docker Compose defines this entire stack in a single YAML file and brings it all up with one command. It is the standard tool for local development environments and CI/CD integration testing.

What This Pillar Covers

  • Writing docker-compose.yaml with services, networks, volumes, and environment variables
  • Service dependencies with depends_on and health checks for correct startup ordering
  • Multi-environment compose files — overriding base config for development, testing, and staging
  • Running integration tests in CI with Docker Compose providing real database and cache dependencies
  • Production patterns — restart policies, resource limits, and logging configuration

Who This Is For

DevOps engineers and developers who manage multi-container application stacks for local development, CI testing, and small-to-medium production deployments.

Why This Matters in Production

Without Docker Compose, each developer manually starts five services in the right order every morning. With it, docker compose up reproduces the exact production stack locally in under 30 seconds — eliminating environment drift and onboarding friction.

Prerequisites

  • Docker Fundamentals — containers, images, and basic networking
  • Docker Networking and Storage — volumes and bridge networks
  • Basic YAML syntax
Learning Progression
1

Docker Compose Fundamentals — Defining Multi-Container Applications

Define and run multi-container applications with Docker Compose — covering the compose file schema, service configuration, and essential CLI commands.

2

Docker Volumes and Persistent Storage — Volumes, Bind Mounts, and tmpfs

Manage persistent data in Docker using named volumes, bind mounts, and tmpfs — and learn exactly which one to use for production vs development.

3

Docker Compose for Local Development — Full Stack in One Command

Build a complete local development stack with Docker Compose — API, PostgreSQL, Redis, and RabbitMQ — with hot reloading and clean config.

4

Docker Compose Health Checks and Dependency Ordering

Configure service health checks and correct startup ordering in Docker Compose so apps never start before their dependencies are ready.

5

Docker Compose in CI/CD Pipelines — GitHub Actions Integration

Use Docker Compose inside GitHub Actions to run integration tests against real databases, caches, and queues before every merge.

6

Docker Compose Production Patterns — Restart Policies, Resource Limits, and Env Config

Apply production-grade Compose patterns: restart policies, CPU/memory limits, environment separation, and config management for real deployments.

7

Docker CI/CD Pipeline — Build, Scan, Push, and Deploy with GitHub Actions

Build a complete Docker CI/CD pipeline: multi-stage builds, vulnerability scanning with Trivy, push to ECR, and zero-downtime deploy using GitHub Actions.

Frequently Asked Questions

What does the Docker Compose and Multi-Container Applications concept cover?

Docker Compose and Multi-Container Applications covers a variety of key topic guides, including: Docker Compose Fundamentals — Defining Multi-Container Applications, Docker Volumes and Persistent Storage — Volumes, Bind Mounts, and tmpfs, Docker Compose for Local Development — Full Stack in One Command, Docker Compose Health Checks and Dependency Ordering, Docker Compose in CI/CD Pipelines — GitHub Actions Integration, Docker Compose Production Patterns — Restart Policies, Resource Limits, and Env Config, Docker CI/CD Pipeline — Build, Scan, Push, and Deploy with GitHub Actions. Complete overview mapping DevOps concepts for Docker Compose and Multi-Container Applications.

How does Docker Compose and Multi-Container Applications relate to the Docker hub?

Docker Compose and Multi-Container Applications is a core learning conceptual pillar mapped within the Docker engineering hub of the DevOps Network.

Are these DevOps concepts free to learn?

Yes, all lessons, visual roadmaps, and guides on DevOps Network are 100% free with no paywalls or sign-up gates for learning content.

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