1 Network

• Imagine a scenario when you want your backend container to connect to your DB container
  • BAD: Expose the backend container port, and the DB container port to the outside world then attempt to used each of their respective exposed port to talk.
  • GOOD: docker-compose has a default DNS server that gives containers their domain name based on the label we used their docker-compose file.
    • Example myAwesomeDB:5432 translates into 192.168.4.4:5432 with docker-compose.yml

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