Sharing Data

Updated Mar 11, 2022 ·

Overview

Sharing data between the host and a container can be achieved using bind mounts. The command below maps a host directory to a container directory.

docker run -v ~/hostdata:/containerdata

Bind mounts can also be specified in Docker Compose files. Multiple entries can be added for required bind mounts.

services:
  app:
    volumes:
      - ~/hostdata:/containerdata

To connect containers to specific networks, use the --network flag or define networks in Compose files.

docker run --network net1

In a docker compose file, the networks section allows additional configurations like assigning specific IP addresses.

services:
  app:
    networks:
      net1:
        ipv4_address: 192.168.1.100
networks:
  net1:
    driver: bridge

Port mapping connects traffic between the host and container.

docker run -p 8000:8000

In a docker compose file, each port mapping uses a separate line.

services:
  app:
    ports:
      - 8000:8000

The docker inspect command provides detailed information about containers, including networking and mounted data.

docker inspect container_id_or_name