Trouble with document_exporter

[mepi0011]

Hello,

when I try to backup paperless on my external USB device, I get just the error, that the path does not exist.

docker-compose exec webserver document_exporter /media/backup/Backup/paperless-ng
CommandError: That path doesn't exist

The path exist, and I can change to this folder with cd /media/backup/Backup/paperless-ng.

Could this a permission issue?

My docker/paperless setup:

version: "3.4"
services:
  broker:
    image: redis:6.0
    restart: unless-stopped

  db:
    image: postgres:13
    restart: unless-stopped
    volumes:
      - pgdata:/var/lib/postgresql/data
    environment:
      POSTGRES_DB: paperless
      POSTGRES_USER: <secret>
      POSTGRES_PASSWORD: <secret>

  webserver:
    image: jonaswinkler/paperless-ng:latest
    restart: unless-stopped
    depends_on:
      - db
      - broker
    ports:
      - 8001:8000
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:8001"]
      interval: 30s
      timeout: 10s
      retries: 5
    volumes:
      - data:/usr/src/paperless/data
      - media:/usr/src/paperless/media
      - /srv/dev-disk-by-label-data/paperless/paperless-export:/usr/src/paperless/export
      - /srv/dev-disk-by-label-data/paperless/paperless-inbox:/usr/src/paperless/consume
    env_file: docker-compose.env
    environment:
      PAPERLESS_REDIS: redis://broker:6379
      PAPERLESS_DBHOST: db

volumes:
  data:

[mepi0011]

I think the problem is that the specified export path is outside the docker container. Is there a simple solution for this?

[TobenderZephyr]

That path does not exist inside the container.

> docker exec -it paperless_webserver_1 /bin/bash
root@dfbc4fba98a9:/usr/src/paperless/src# cd /media/
root@dfbc4fba98a9:/media# ls
root@dfbc4fba98a9:/media#

You would need to add the the path to your docker-compose.yml inside the service webserver:

  webserver:
    volumes:
      - data:/usr/src/paperless/data
      - media:/usr/src/paperless/media
      - /srv/dev-disk-by-label-data/paperless/paperless-export:/usr/src/paperless/export
      - /srv/dev-disk-by-label-data/paperless/paperless-inbox:/usr/src/paperless/consume
      - /media/backup/Backup/paperless-ng:/media/backup/Backup/paperless-ng

I really don't recommend directly mounting USB devices/storage into your containers if you are planning to remove the device at any point. Also you will need to make sure that the user running the service inside the container has read/write permission on the file system of your USB device.

[mepi0011]

Hello @TobenderZephyr,
thank you very much for the help!
In the meantime I understood the problem and was able to solve my problem.
I even wrote a small script that creates a daily incremental update via document_exporter and duplicity.