A Developer's Essential Guide To Docker Compose Pdf ((top)) -

logs -f # Follow logs logs --tail=100 api # Last 100 lines of 'api' exec api bash # Interactive shell ps # Show status top # Show running processes

project/ ├── docker-compose.yml ├── app/ │ ├── Dockerfile │ └── index.js └── .env a developer's essential guide to docker compose pdf

One command to spin up a dev environment identical to production dependencies (databases, caches, queues). 2. Core Concepts | Concept | Description | |---------|-------------| | Service | A containerized application (e.g., web app, database) | | Network | Isolated communication layer between services | | Volume | Persistent data storage (survives container restarts) | Default behavior: All services in the same Compose project automatically join a default network and can reach each other using their service name as hostname. 3. The docker-compose.yml File – Anatomy version: '3.8' # Latest stable version (March 2025) services: app: build: ./app ports: - "3000:3000" environment: - NODE_ENV=development depends_on: - db - redis logs -f # Follow logs logs --tail=100 api

docker compose up → entire stack starts in isolation. "pg_isready -U dev"] interval: 10s

db: image: postgres:15 environment: POSTGRES_USER: dev POSTGRES_PASSWORD: devpass POSTGRES_DB: myapp volumes: - db_data:/var/lib/postgresql/data healthcheck: test: ["CMD-SHELL", "pg_isready -U dev"] interval: 10s