Klotho 2.0

Terraform/CDK alternative designed for developers

Describe what your application needs in the way you think about it, Klotho does the rest

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Think like an application architect

Describe how your application needs to work, not how it should be implemented

Think

I want my profile service to run in a container, that reads data from a Postgres database and is exposed as an API.

Write

Get

High-level building blocks and interactions

lambda_functions.py

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  # Define a Lambda function for handling profiles
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  profile_lambda = Compute.Function(
3
    name="profile_lambda",
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    handler="apps/profile.handler",
5
  )
6
  # Create a PostgreSQL database for storing profiles
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  profiles_database = Databases.Postgres(name="profiles_db")
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  # Grant the profile Lambda read access to the profiles database
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  profile_lambda.reads_from(profiles_database)

Out-of-the-box open source frameworks built-in

Use Next.js, Django, Svelte, Astro with zero config, and easily add your own

infra.py

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# Next.js service
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nextjs_service = Frameworks.NextJS(
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    name="nextjs-app",
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    context="./nextjs-app"
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)

Mix serverless and serverful technologies freely

lambda_functions.py

1
  # Define a Lambda function for handling profiles
2
  profile_lambda = Compute.Function(
3
    name="profile_lambda",
4
    handler="apps/profile.handler",
5
  )
6
  # Create a PostgreSQL database for storing profiles
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  profiles_database = Databases.Postgres(name="profiles_db")
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  # Grant the profile Lambda read access to the profiles database
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  profile_lambda.reads_from(profiles_database)

Easy domain and API routing

api_config.py

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  # Create a new API
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  mysite_api = API(name="mysite-api")
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  # Attach the profile Lambda function to the "/api/profiles" route
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  mysite_api.attach_service(profile_lambda, route="/api/profiles")
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  # Attach the OCR service to the "/api/ocr" route
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  mysite_api.attach_service(ocr, route="/api/ocr")
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  # Expose the API on this domain
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  domain = Domain(name="mysite.com", exposes=mysite_api)

Multi-repo support

github.com/kentoso/invoices-service/infra.py

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  # 'kentoso' is the global the project name
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  klotho.Application("billing-service", project="kentoso")
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  # Define a Lambda function for handling profiles
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  Compute.Function(
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    name="invoice_lambda",
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    handler="src/invoice.handler",
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  )

github.com/kentoso/billing-service/infra.py

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  # The same 'kentoso' project
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  klotho.Application("billing-service", project="kentoso")
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  # Import invoice lambda from github.com/kentoso/invoices-service
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  invoice_lambda = Compute.Function(from_project=True, name="invoice_lambda")
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  # This container is defined in the current repo
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  billing_service = Compute.Container(context="./billing-service")
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  # The container we defined in this repo calls the lambda from the other repo
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  billing_service.calls(invoice_lambda, protocol="https")

Use Klotho's runtime SDK

app.py

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    # Import the Klotho SDK
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    import klotho
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    import psycopg2
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    # Get the connection details from Klotho's config store
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    users_db = klotho.config.datastores.get("users_db")
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    # Use the connection details to connect to the database
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    conn = psycopg2.connect(
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      host=users_db.host,
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      port=users_db.port,
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      dbname=users_db.name,
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      user=users_db.user,
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      password=users_db.password
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    )

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