CV-M008: Orphan volume definition
Warning Semantic
Why This Matters
A volume is defined in the top-level volumes section but is not referenced by any service. Orphan volume definitions cause Docker to create empty volumes that consume disk space and add clutter. Remove unused volumes or mount them in the appropriate services.
How to Fix
Remove the unused volume or mount it in a service.
Before (incorrect)
services:
db:
image: postgres
volumes:
pgdata:
cache:After (correct)
services:
db:
image: postgres
volumes:
- pgdata:/var/lib/postgresql/data
volumes:
pgdata:Rule Details
- Rule Code
- CV-M008
- Severity
- Warning
- Category
- Semantic