Validate Docker compose

Lint a Compose YAML file for missing services, sources, and common deployment risks.

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ToolDocker Compose Validator
Input
Output
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How it works

The YAML is parsed and checked for top-level services, image or build sources, ports, volumes, environment shapes, and common security or dependency issues. Findings are lint messages rather than full engine schema validation.

  • The Compose specification permits several equivalent forms.
  • Warnings target reproducibility and isolation practices.

Worked example

Catch security and best-practice issues
Detect :latest image tag, privileged mode, and port binding to all interfaces in a Compose file
Input
											services:
  web:
    image: nginx:latest
    ports:
      - "80:80"
    privileged: true
Output
												# docker-compose Validation

Services found: web
Errors: 0 | Warnings: 2 | Info: 1

## Warnings
  - Line 3: Avoid using ':latest' tag for image in service 'web'
  - Line 6: privileged mode is enabled for 'web'. This is a security risk.

## Info
  - Line 5: Port 80:80 binds to all interfaces. Consider binding to 127.0.0.1 for local-only access.

When to use this

Local stacks, integration CI, and multi-container documentation lint compose files.

Edge cases

  • A service with neither image nor build cannot start.
  • Host port collisions depend on the environment and cannot be proven from YAML.
  • Environment secrets remain visible to container inspection.

References