> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lightdash.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Configure a standalone scheduler worker for self-hosted Lightdash

<Note>
  🛠 This page is for engineering teams self-hosting their own Lightdash instance. If you want to set up scheduled deliveries, go to the [Scheduled deliveries](/guides/how-to-create-scheduled-deliveries) guide.
</Note>

By default, the Lightdash server runs a scheduler worker. For more advanced infrastructure, we can run the scheduler worker separately from the main server.

### 1. Disable scheduler worker in the main server

Set the following environment variable value:

```bash theme={null}
SCHEDULER_ENABLED=false
```

### 2. Run standalone schedule worker

Command to start scheduler worker:

```bash theme={null}
yarn workspace backend scheduler
```

Note that it expects the same environment variables as the main server.

### Example docker-compose.yml

```yaml theme={null}
version: "3.8"
x-environment: &commonEnvironment
  - PGHOST=${PGHOST:-db}
  - PGPORT=${PGPORT:-5432}
  - PGUSER=${PGUSER:-postgres}
  - PGPASSWORD=${PGPASSWORD}
  - PGDATABASE=${PGDATABASE:-postgres}
  - SECURE_COOKIES=${SECURE_COOKIES:-false}
  - TRUST_PROXY=${TRUST_PROXY:-false}
  - LIGHTDASH_SECRET=${LIGHTDASH_SECRET}
  - PORT=${PORT:-8080}
  - SITE_URL=${SITE_URL}
  - EMAIL_SMTP_HOST=${EMAIL_SMTP_HOST}
  - EMAIL_SMTP_PORT=${EMAIL_SMTP_PORT}
  - EMAIL_SMTP_SECURE=${EMAIL_SMTP_SECURE}
  - EMAIL_SMTP_USER=${EMAIL_SMTP_USER}
  - EMAIL_SMTP_PASSWORD=${EMAIL_SMTP_PASSWORD}
  - EMAIL_SMTP_ALLOW_INVALID_CERT=${EMAIL_SMTP_ALLOW_INVALID_CERT}
  - EMAIL_SMTP_SENDER_NAME=${EMAIL_SMTP_SENDER_NAME}
  - EMAIL_SMTP_SENDER_EMAIL=${EMAIL_SMTP_SENDER_EMAIL}
  - HEADLESS_BROWSER_HOST=headless-browser
  - HEADLESS_BROWSER_PORT=3000
services:
  headless-browser:
    image: browserless/chrome
    restart: always
    ports:
      - "3001:3000"

  db:
    image: postgres
    restart: always
    environment:
      POSTGRES_PASSWORD: ${PGPASSWORD}
      POSTGRES_USER: ${PGUSER:-postgres}
      POSTGRES_DB: ${PGDATABASE:-postgres}
    volumes:
      - db-data:/var/lib/postgresql/data

  lightdash:
    image: lightdash/lightdash:latest
    depends_on:
      - db
    environment:
       <<: *commonEnvironment
       SCHEDULER_ENABLED: 'false'
    volumes:
      - "${DBT_PROJECT_DIR}:/usr/app/dbt"
    ports:
      - ${PORT:-8080}:${PORT:-8080}

  scheduler:
    image: lightdash/lightdash:latest
    entrypoint: ["yarn", "workspace", "backend", "scheduler"]
    depends_on:
      - db
    environment: *commonEnvironment

volumes:
  db-data:
```