Stacks (via Git Repo): Additional property label_file is not allowed

[Bl4d3s]

Ask a Question!

Hi,

I am using the stacks feature to deploy based on a git repository.
I wish to add labels based on a label file (or the UI as an alternative) as I use the same compose files in different environments (configured with env substitution).

If I were to use the env substiution, I would not be able to define labels that easily, because every label (that could possibly be set) would be required to be set in the env file.

Is there any way to achieve this?
Docker compose should support this feature (see here)
But if I specify the label_file property I get the following error on update/deployment:
Additional property label_file is not allowed

Sample:

services:
  adguard:
    image: adguard/adguardhome
    container_name: adguard
    restart: always
    cap_add:
      - NET_ADMIN
    volumes:
      - ${ADGUARD_WORK}:/opt/adguardhome/work:rw
      - ${ADGUARD_CONFIG}:/opt/adguardhome/conf:rw
    networks:
      local:
        ipv4_address: ${LOCAL_IPV4}
      vlan:
        ipv4_address: ${VLAN_IPV4}
        ipv6_address: ${VLAN_IPV6}
    label_file: ${ADGUARD_CONFIG}/app.labels

networks:
  local:
    name: ${LOCAL_NETWORK}
    external: true
  vlan:
    name: ${VLAN_NETWORK}
    external: true

and the label file is created and accessible under the $ADGUARD_CONFIG/app.labels path.
e.g.

labels:
  abc: 123

System info:
Docker Engine v28.3.2
Docker Compose v2.38.2
Portainer v2.27.9 (LTS)

[Nick-Portainer]

Does this work locally? Seems like the indentation for label_file should be under the service such as Adguard and not under services where it seems to be

[Bl4d3s]

Thanks for the reply.

Yes this does work locally, the label_file is correctly indented (and is under the adguard: section, not services:)

I noticed an issue with my labels file though, unfortunately this does not change anything.
I updated the label sample above.

I just noticed the property is not recognized by the UI, even when using the web editor to create the stack.