Docker vs Podman Vergleich

# Docker — Node.js-Anwendung mit Nginx
# Dockerfile
FROM node:20-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production

FROM node:20-alpine
WORKDIR /app
COPY --from=builder /app/node_modules ./node_modules
COPY . .
EXPOSE 3000
USER node
CMD ["node", "server.js"]

# docker-compose.yml
services:
  app:
    build: .
    ports: ["3000:3000"]
    environment:
      - NODE_ENV=production
    depends_on: [db]
  db:
    image: postgres:16-alpine
    environment:
      POSTGRES_PASSWORD: secret

# Podman — Rootless-Container ausführen
# Docker-Images direkt verwenden
podman pull docker.io/library/nginx:alpine

# Rootless-Modus (Standard) — keine Root-Rechte
podman run -d --name web -p 8080:80 nginx:alpine

# Pod erstellen (Kubernetes-ähnlich)
podman pod create --name myapp -p 3000:3000
podman run -d --pod myapp --name db postgres:16-alpine
podman run -d --pod myapp --name api node:20-alpine

# Systemd-Dienstdatei erzeugen
podman generate systemd --name web --files --new

# Docker-Compose-Kompatibilität
podman-compose up -d