docker config_warning ai_generated true

WARNING: the attribute 'version' is obsolete in docker compose

ID: docker/compose-version-obsolete

Also available as: JSON · Markdown
98%Fix Rate
95%Confidence
50Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
27 active — — —

Root Cause

Docker Compose V2 no longer needs the 'version' field. Harmless warning.

generic

Workarounds

  1. 98% success Simply remove the 'version' line from docker-compose.yml 
    # Remove this line:
# version: '3.8'

    Sources: https://docs.docker.com/reference/compose-file/version-and-name/

  2. 90% success It's just a warning — it still works. But removing it is cleaner 
    # Simply remove the 'version' key from docker-compose.yml:
# Before:
# version: '3.8'
services:
  app:
    image: myapp
# Docker Compose V2 ignores the version field entirely

    Sources: https://docs.docker.com/reference/compose-file/version-and-name/

Dead Ends

Common approaches that don't work:

  1. Downgrade Docker Compose 80% fail

    Older versions are unmaintained — accept the new format

  2. Pin version to '3.8' or another specific version 75% fail

    Still triggers the warning — the field itself is obsolete

Error Chain

Frequently confused with: