Docker Compose Environments

3. Layer configuration and overrides

• Use a base Compose file for common behavior and environment-specific overrides or profiles for optional variation.
• Keep environment variables and secrets scoped by service and environment.
• Prevent local convenience settings from silently leaking into CI or production-like stacks.

4. Manage data and state explicitly

• Choose named volumes, bind mounts, tmpfs, or ephemeral storage based on the workflow.
• Know which state should persist between runs and which should reset.
• Keep destructive reset or rebuild workflows explicit and easy to understand.

5. Re-check operability

• Add healthchecks when dependent services need a signal more meaningful than "container started."
• Make logs, ports, and shell access discoverable.
• Keep teardown, rebuild, and reset operations documented in the workflow.
• Watch for network conflicts, orphaned volumes, and stale containers.

Decision Rules

Quality Bar

• Each service should have a clear purpose and dependency model.
• Environment variation should be explicit, not hidden in ad hoc local edits.
• Data persistence and reset semantics should be easy to explain.
• Healthchecks should reflect meaningful readiness where required.
• Compose files should stay small enough to review and evolve safely.

Avoid These Failure Modes

• Do not include every optional service in every environment by default.
• Do not rely on container start order as proof of readiness.
• Do not mix production-like secrets and local convenience values casually.
• Do not let named volumes and bind mounts accumulate without ownership or reset strategy.
• Do not force one compose file to serve every environment without clear layering.

References

• Compose environment guide: references/compose-environments-playbook.md
• Compose review checklist: references/compose-environments-checklist.md