docker-compose volumes_from usage example

user_965778 0
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Can you please provide an example to sharing a path using volumes_from from container A to Container B, in addition how container B can access this path after sharing is done.

Thanks

docker-compose docker
2 Answers
version: "3"

services:

  web:
    nginx:alpine
    ports:
    - "80:80"

  postgres:
    image: postgres:9.4
    volumes:
      - db-data:/var/lib/db

  backup:
    image: postgres:9.4
    volumes:
      - db-data:/var/lib/backup/data

  redis:
    image: redis
    ports:
      - "6379:6379"
    volumes:
      - ./data:/data

volumes:
  db-data:
    external: true

For me what solved was adding an external volume not created by compose using "external: true" https://docs.docker.com/compose/compose-file/compose-file-v3/#external

user_172615320
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