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Docker Compose Generator - Service Configuration Builder

Build docker-compose.yml files visually. Add multiple services with images, ports, environment variables, volumes, depends_on, and restart policies, then copy the generated YAML.

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Service 1

Ports (host:container)

Environment variables

Volumes

Depends on

docker-compose.yml
version: '3.9'

services:
  app:
    image: nginx:latest
    restart: unless-stopped

What is Docker Compose?

Docker Compose is a tool for defining and running multi-container Docker applications. You describe your services, networks, and volumes in a docker-compose.yml file, then start everything with a single command: docker compose up.

Key concepts

  • Service: a container defined by an image and configuration. Each service runs one container image (e.g., a web server, a database, a cache).
  • Image: the read-only template for the container, pulled from Docker Hub or a registry.
  • Volumes: persistent storage that outlives the container’s lifecycle. Mount a volume to keep database data between restarts.
  • Networks: Compose creates a default network so all services can communicate by service name (e.g., postgres or redis).
  • Ports: map a container port to a host port (hostPort:containerPort). Only expose ports you actually need.
  • Environment variables: pass configuration into containers. Prefer .env files for secrets rather than hardcoding them in the YAML.

Common commands

CommandDescription
docker compose up -dStart all services in detached (background) mode
docker compose downStop and remove containers and networks
docker compose logs -fFollow log output from all services
docker compose psList running services and their ports
docker compose pullPull latest images for all services
docker compose exec service bashOpen a shell inside a running service