ERROR: Service "xxx" uses an undefined network "xxx"
You need to add this network to the Compose file as external network like this:
networks: frontend-network: external: trueYou can read about this in the docks here: https://docs.docker.com/compose/compose-file/compose-file-v3/#external-1.
You need to create a user-defined network with:
docker network create etl_dev
After that, make sure you added it to the yaml with top-level networks:, which goes at the same level of services.
version: "3.9"networks: etl_dev: external: trueservices: local_database: image: postgres:12 networks: - etl_dev volumes: - /home/local_postgres_data:/var/lib/postgresql/data environment: POSTGRES_USER_FILE: /run/secrets/etl_pg_usr_v1 POSTGRES_PASSWORD_FILE: /run/secrets/etl_pg_pass_v1If you are using swarm, make sure you add -d overlayto the docker network create command. See Network docs.