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Docker Compose Generator
Build a docker-compose.yml with databases, caches and health checks.
Services alongside it
Quick Tool Overview
The Docker Compose Generator wires your application to the databases and caches beside it, with a real health check on each one and depends_on waiting for service_healthy — which is the fix for a stack that crashes on the first run and works on the second.
- What it does
- Generates a docker-compose.yml
- You give it
- A service name, a port and the services you need
- You get back
- A compose file with health checks and volumes
- Best for
- A local development stack
About the Docker Compose Generator
Pick the services your application needs and this writes the compose file: your app, the databases and caches beside it, the connection strings wired between them, and a named volume for anything that must survive a docker compose down.
The health checks are the part worth having. `depends_on` on its own only waits for a container to start, not for the service inside it to be ready — which is why an application so often crashes on the first run and works on the second. Every database here declares a health check and the app waits on `service_healthy`, so the stack comes up in the right order every time. The obsolete top-level `version:` key is left out, because Compose v2 ignores it and warns about it.
Key features of the Docker Compose Generator
Health checks that mean something
pg_isready, mysqladmin ping, redis-cli ping — and the app waits on service_healthy, not merely on the container having started.
Connection strings wired up
The DATABASE_URL in your app matches the credentials in the database service, because both are generated from the same fields.
Named volumes for anything durable
So docker compose down does not take your development database with it.
The node_modules trap avoided
An anonymous volume keeps the image’s node_modules, so a host install for a different platform cannot shadow it.
No obsolete version key
Compose v2 ignores it and warns about it, so the file starts at services: where it should.
How to use the Docker Compose Generator
-
1
Name your service
The service name and the port it listens on.
-
2
Add what it needs
Postgres, MySQL, MariaDB, Mongo, Redis, nginx, Mailpit, MinIO, RabbitMQ, Elasticsearch or Adminer.
-
3
Set the database details
Name, user and password — these become both the container environment and the connection string.
-
4
Save and run
Save as docker-compose.yml, then docker compose up.
Frequently asked questions
Compose v2 ignores it entirely and prints a deprecation warning when it is there. The schema is now inferred, so the file starts straight at services:.
Because depends_on without a condition only waits for the container to start, not for the process inside to accept connections. Pairing it with a health check and condition: service_healthy is what actually fixes it, and that is what this generates.
It stops your host node_modules from shadowing the one inside the image. Without it, packages with native bindings installed on your machine get mounted over the Linux build and fail in ways that look unrelated.
It is built for local development — the passwords are in the file and the database ports are published to your host. For production, move secrets out to an environment file or a secret store and stop publishing database ports.
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