Different settings (configuration) for each replica

[isystem_noob (Isystemtest)]

Hi all, I’m pretty new to docker

I want to have different settings for each replica - different volume mounts. My searches havent come up with anything useful, so I dont think this can be done.

The closest hint I could find was this topic

Is is possible to create a volume for each replica when create a service?

I need to deploy a nginx service with 4 replica using the compose file like the following. Is is possible that it create a volume for each replica automatically? If it is possible, what is the format to specify in the compose file? version: “3” services: nginx: image: nginx ports: - "5000:80" volumes: - log:/var/log/nginx deploy: replicas: 4 restart_policy: condition: on-failure volumes: log:

But Im not sure, are multiple replicas the same as multiple services in a stack (defined in a single compose.yml file)?
Both multiple replicas and multiple services result in multiple containers, right? So whats the difference? Will the docker orchestrator work differently when using replicas instead of services?

Snipped docker compose file with multiple replicas:

version: "3.7"
services:
  web:
    image: portal:0.0.1
    --- snipped content ---
    volumes:
      - "/home/portal/Dev/Data:/app/Data"
    deploy:
      replicas: 3

Snipped docker compose file with multiple services:

version: "3.7"
services:
  web1:
    image: portal:0.0.1
    --- snipped content ---
    volumes:
      - "/home/portal/Dev/Data1:/app/Data"
    deploy:
      replicas: 1
  web2:
    extends: web1
    volumes:
      - "/home/portal/Dev/Data2:/app/Data"
  web3:
    extends: web1
    volumes:
      - "/home/portal/Dev/Data3:/app/Data"

TL;DR: I want to have data from each container in a separate folder on the docker host. Is this possible when using replicas?

Thanks, BR
Nejc