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The equivalent configuration for docker-compose v3 is using the network_mode key: https://docs.docker.com/compose/compose-file/compose-file-v3/#network_mode
You should set network_mode to "host" in your docker-compose.yml.
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version: '3.5'
services:
svc-name:
networks:
- specific-network-name
container_name: "exact-container-reference"
networks:
specific-network-name:
external: false
name: specific-network-name
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version: "3.9"
services:
proxy:
build: ./proxy
networks:
- frontend
app:
build: ./app
networks:
- frontend
- backend
db:
image: postgres
networks:
- backend
networks:
frontend:
# Use a custom driver
driver: custom-driver-1
backend:
# Use a custom driver which takes special options
driver: custom-driver-2
driver_opts:
foo: "1"
bar: "2"
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version: '2'
services:
svc-using-svc-name:
networks:
- default
- specific-network-name
external_links:
- exact-container-reference
networks:
specific-network-name:
external: true