docker-errors-compose

Quick Reference

First Response: Validate the Compose File

ALWAYS run docker compose config before debugging any Compose error. This command parses, resolves variables, and renders the final configuration. If it fails, the Compose file itself is broken.

# Validate and render resolved config
docker compose config

# Validate without output (exit code only)
docker compose config -q

# Show resolved environment variables
docker compose config --environment