CODEWITHSUNDEEP
dockerdocker-compose
Martim Passos
Martim Passos

Reputation: 317

How do I mount a server directory to a Docker Container with Compose?

I'm trying to mount a directory in my organization's server (Y:/some/path) to a docker container. My docker-compose.yml looks like this:

services:

  dagit:
    volumes:
      - type: bind
        source: Y:/some/path
        target: /data
    build:
      context: .
      dockerfile: Dagit.Dockerfile
    ports:
      - "3000:3000"
    container_name: dagit-container

  dagster:
    volumes:
      - type: bind
        source: Y:/some/path
        target: /data
    build:
      context: .
      dockerfile: Daemon.Dockerfile
    container_name: dagster-container
    tty: true
    env_file: .env

I have shared Y:/some/path with Docker. On docker compose up -d --build, I get the following error: Error response from daemon: invalid mount config for type "bind": bind source path does not exist: /host_mnt/uC/my_ip/some/path. How can I properly mount such a directory? Also, what would be the correct way to declare this mount in the top level volumes key and reference it in both services so I don't have to duplicate the code?

Upvotes: 1

Views: 3589

Answers (2)

araisch
araisch

Reputation: 1940

Assuming your enterprise share is Windows/SAMBA CIFS/SMB-Share, add it as Volume directly and not via Windows mount.

volumes:
  shared_folder:
    driver_opts:
      type: cifs
      o: username=smbuser,password=smbpass,uid=UID for mount,gid=gid for mount,vers=3.0,rw
      device: //hostname_or_ip/folder

Version depends on your Server Type, rw = readwrite Then map the volume

services:
  dagit:
    volumes:
      - shared_folder:/root/data

Upvotes: 2

BertC
BertC

Reputation: 2666

Take the following docker-compose.yml file:

version: '3.9'

services:
  DockerA:
    image: ubuntu:latest
    container_name: DockerA
    command: ["sleep", "300d"]
    volumes:
      - "./data:/root/data"

  DockerB:
    image: ubuntu:latest
    container_name: DockerB
    command: [ "sleep", "300d" ]
    volumes:
      - "./data:/root/data"

volumes:
  data:

And next to that file (same directory) create a directory called 'data'.

Now start the dockers with:

docker-compose up -d

If you enter the DockerA container and create something in the data directory:

docker exec -it DockerA /bin/bash
# cd /root/data
# echo "Hello World!" > x.txt

then go into DockerB

docker exec -it DockerB /bin/bash
# cd /root/data
# cat x.txt

you will see the same contents of x.txt.

Now back to the host and check the x.txt file in your ./data directory. Also same contents.

If you edit x.txt on the Host, it will immediatelly be reflected in both DockerA and DockerB.

Upvotes: 2

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