What are links in Docker Compose?
Experience Level: Senior
Tags: Docker Compose
Answer
Links allow you to define extra aliases by which a service is reachable from another service. They are not required to enable services to communicate - by default, any service can reach any other service at that service’s name. In the following example, db is reachable from web at the hostnames db and database:
version: "3.9"
services:
web:
build: .
links:
- "db:database"
db:
image: postgres
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