Starts multiple instances of a service.
Section: Developer Workflows
Scale a service
bash
bash
docker compose up -d --scale worker=3Explanation
Useful for queue consumers and basic horizontal scaling tests.
Learn the surrounding workflow
Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.
Related commands
Same sheet · prioritizing Developer Workflows
Watch files and sync/rebuild
Watches project files and applies sync or rebuild actions when configured.
Install dependencies in app service
Executes dependency installation in the service environment.
Run database migration
Runs a migration task in an ephemeral application container.
Validate effective config
Checks whether the Compose config is valid without printing it.