CV-S003: Unknown Service Property
Error Schema
Why This Matters
Service definitions in Docker Compose have a defined set of properties such as image, build, command, ports, volumes, environment, depends_on, healthcheck, and restart. Any property not in the compose-spec service schema is rejected. Common typos include "port" instead of "ports", "volume" instead of "volumes", and "env" instead of "environment". Extension fields starting with "x-" are allowed within services for custom metadata that Docker Compose will pass through to deploy contexts or ignore.
How to Fix
Use a valid service property name. Check the Docker Compose reference for the full list.
Before (incorrect)
services:
web:
image: nginx
port:
- "80:80"After (correct)
services:
web:
image: nginx
ports:
- "80:80"Rule Details
- Rule Code
- CV-S003
- Severity
- Error
- Category
- Schema