Hoping for some help with a novice please.

My aim here is just to have somewhere I can easily reference where i’m storing the data as I add more and more stacks.

in Portainer (BE 2.19.1) I’ve created a volume called ‘my_data’. When I look at Portainer volumes it has in the mount point ‘/var/lib/docker/volumes/my_data/_data’. So thats where I’ve put some of the config files and other persistent data I want to use.

I want to use the ‘my_data’ Volume in multiple stacks (using docker compose) as the persistent data storage. I thought I’d be able to say in my compose:

volumes:

`- my_data/changedetection/datastore:/datastore`

However this gives the error:

failed to deploy a stack: service "changedetection" refers to undefined volume my_data/changedetection/datastore: invalid compose project

​

  1. Do I need to have one Volume for every stack so I would just say my_data:/datastore?
  2. Am I better off just ignoring Volumes and putting my persistent files somewhere like /data/my_data/ ?
  3. Am I asking the wrong questions :)

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  • Kalindro@alien.topBEnglish
    1·
    11 months ago

    It would be easier if you posted whole compose.
    Here’s an example for NPM, that’s how external volume (that is already created via other means) should be called:

    version: '3.8'

services:
  app:
    image: 'jc21/nginx-proxy-manager:latest'
    container_name: npm
    restart: unless-stopped
    ports:
      - '80:80'       # Public HTTP Port
      - '443:443'     # Public HTTPS Port
      - '81:81'       # Admin Web Port
    environment:
      DISABLE_IPV6: 'true'
    volumes:
      - npm-data:/data
      - npm-letsencrypt:/etc/letsencrypt

networks:
  npm-network:
    external: true

volumes:
  npm-data:
    external: true
  npm-letsencrypt:
    external: true