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This example uses no built-in Rust template. The orchestrator uses a repo-owned docker-compose.preview.yml (or docker-compose.preview.yaml) in the repository root and injects host ports for the app and db.

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Repository

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Stack

  • Framework: Rust (Axum or similar)
  • Database: PostgreSQL (migrations on startup)
  • Cache: Redis
  • Config: .env (DATABASE_URL, REDIS_URL)
  • Health: GET /health, GET /ready (DB + Redis), GET /ping, GET /stats
  • Migrations and seeder: Run on app startup

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Key files

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docker-compose.preview.yml (repository root) — required

For Rust there is no built-in template, so you must provide a preview compose file. Use service names app and db; do not set host ports—the orchestrator injects them. Example structure (adjust build and env to match your repo): 
services:
  app:
    build: .
    ports: []   # Orchestrator injects host port
    environment:
      - DATABASE_URL=postgres://preview:preview@db:5432/pr_${PR_NUMBER}
      - REDIS_URL=redis://redis:6379/
    depends_on:
      - db
      - redis
  db:
    image: postgres:16-alpine
    environment:
      POSTGRES_USER: preview
      POSTGRES_PASSWORD: preview
      POSTGRES_DB: pr_${PR_NUMBER}
  redis:
    image: redis:7-alpine
The orchestrator writes docker-compose.preview.generated.yml with injected ports and runs docker compose against it.

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preview-config.yml (optional)

You can add preview-config.yml for:
  • health_check_path: e.g. /health or /ready
  • build_commands: e.g. cp .env.example .env
  • env: extra env vars
There is no framework: rust; the presence of docker-compose.preview.yml tells the orchestrator to use your compose file.

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Local run and API

See the repo README for:
  • cp .env.example .env, set DATABASE_URL and REDIS_URL
  • createdb preview_example, cargo run
  • App listens on http://0.0.0.0:8080
Endpoints: /health, /ready, /ping, /stats. Port and routing are handled by the orchestrator when using the injected compose.