ONC

Snowpark Container Services is a fully managed solution designed to simplify deploying, managing, and scaling containerized applications within the Snowflake ecosystem. Key Features Benefits of Snowpark Container Services in Native Apps Integrating Snowpark Container Services into Snowflake Native Apps enables developers to create solutions for various use cases, including: Developers benefit from Snowflake’s Native Apps Framework safeguards, which ensure secure and efficient operations. Development Workflow for Snowpark Container Services Here’s a quick guide to the development cycle for building and deploying containerized services within Snowflake. 1. Develop Code Locally 2. Build and Push an Image 3. Provision Resources 4. Deploy and Test Services Getting Started To build containerized applications with Snowpark Container Services: For a deep dive into architecture and workflows, explore Snowflake’s guides and tutorials on Snowpark Container Services and Native Apps. The Snowflake Native Applications Framework allows developers to package Snowflake features into standalone applications that can be installed across multiple accounts. This framework now supports advanced features for managing resource provisioning and deploying container services. Below is an overview of how to integrate container services into a Native App. Key Components 1. Manifest File The manifest file defines the configuration and setup properties for the application, including: Example Manifest File: Specifying Container Images yaml Copy code manifest_version: 1 version: name: V1 label: “Version One” comment: “The first version of my amazing Snowflake Native App” artifacts: readme: readme.md setup_script: scripts/setup.sql container_services: images: – /provider_db/provider_schema/provider_repo/server:prod – /provider_db/provider_schema/provider_repo/web:1.0 Here: Setting a Web UI as the Landing Page For apps with a web UI, specify a default_web_endpoint field to make the UI the landing page. yaml Copy code default_web_endpoint: service: ux_schema.ux_service endpoint: ui Here, service corresponds to the name defined in the CREATE SERVICE command, and endpoint refers to the service’s endpoint in the specification file. Using Streamlit as a Landing Page Alternatively, you can specify a default_streamlit field to use Streamlit as the landing page. Note: default_web_endpoint and default_streamlit are mutually exclusive—you can only use one. 2. Setup Script The setup script executes during the application installation and upgrade processes. It contains SQL statements for creating: Resource Provisioning for Snowpark Container Services The setup script also includes logic for provisioning resources like compute pools. However, these provisioning procedures are executed post-installation to ensure the consumer has granted the necessary privileges. Managing Compute Pools and Privileges Consumer-Controlled Resource Provisioning A foundational principle of the Snowflake Native Apps Framework is that consumers maintain full control over the resources the application accesses. This includes compute resources. Privileges Required To enable an application to provision resources, specific privileges must be requested in the manifest file: Example Privileges in the Manifest File yaml Copy code privileges: – CREATE COMPUTE POOL description: “Enable application to create its own compute pool(s)” – BIND SERVICE ENDPOINT description: “Enables application to expose service endpoints” Note: These privileges are not granted by default. The installation user may need to request them from another user with the appropriate permissions within the organization. By wrapping container services into a Snowflake Native App, developers can: This approach ensures that both providers and consumers retain control over their resources and data, while maximizing the capabilities of Snowflake Native Apps. Managing Privileges and Deploying Services in Snowflake Native Apps Once a Snowflake Native App is installed, consumers can grant the necessary privileges through various supported mechanisms. Here’s an overview of how to configure privileges, deploy services, and manage app components effectively. Granting Privileges 1. Snowsight UI Configuration Snowflake Native Apps with Snowpark Container Services provide a custom Snowsight configuration UI. When privileges are granted via this UI, it triggers the app’s grant_callback procedure specified in the manifest file. This procedure receives a list of privileges as input, making it ideal for initiating resource provisioning, such as creating compute pools. For containerized apps, this is the recommended approach. Example Manifest Configuration: yaml Copy code manifest_version: 1 configuration: log_level: debug trace_level: always grant_callback: setup.grant_callback 2. Streamlit Integration Using Snowflake’s Permissions SDK, developers can create Streamlit-based pop-ups to request privileges. After privileges are granted through the pop-up, resource provisioning can begin. Specify Streamlit as the landing page in the manifest using the default_streamlit field. This configuration allows Streamlit to invoke the necessary resource provisioning procedures. 3. SQL Worksheet Consumers preferring SQL-based interaction can grant privileges and execute resource provisioning procedures directly through the SQL worksheet. Example Grant Callback Procedure: sql Copy code CREATE OR REPLACE PROCEDURE setup.grant_callback(privileges ARRAY) RETURNS STRING AS $$ BEGIN CREATE COMPUTE POOL IF NOT EXISTS backend_compute_pool MIN_NODES = 1 MAX_NODES = 1 INSTANCE_FAMILY = CPU_X64_XS; CALL services.start_backend(‘backend_compute_pool’); RETURN ‘Callback successful’; END; $$; GRANT USAGE ON PROCEDURE setup.grant_callback(ARRAY) TO APPLICATION ROLE app_public; This procedure creates a compute pool and then calls another procedure to set up services within the pool. Deploying Services Once compute pools are created, the application can deploy one or more services. Scenario 1: The App Has All Required Resources If the app has everything it needs, it can directly execute CREATE SERVICE commands in the grant_callback procedure to set up its services. For services requiring warehouses, the app can request the CREATE WAREHOUSE privilege in the manifest and create warehouses as needed. Scenario 2: The App Needs Additional Consumer Resources If the app requires additional objects (e.g., external access integrations or secrets) from the consumer, references can be used. A reference includes a register_callback procedure that binds the required resources. This procedure can also trigger service creation after the reference is bound. Example Register Callback Procedure: sql Copy code CREATE OR REPLACE PROCEDURE v1.register_single_callback(ref_name STRING, operation STRING, ref_or_alias STRING) RETURNS STRING LANGUAGE SQL AS $$ BEGIN CASE (operation) WHEN ‘ADD’ THEN SELECT SYSTEM$SET_REFERENCE(:ref_name, :ref_or_alias); CASE (:ref_name) WHEN ‘external_access_backend_reference’ THEN CALL services.start_service_with_egress(); WHEN ‘secret_reference’ THEN CALL services.start_service_using_secret(); END CASE; WHEN ‘REMOVE’, ‘CLEAR’ THEN SELECT SYSTEM$REMOVE_REFERENCE(:ref_name); ELSE RETURN ‘Unknown operation: ‘ || operation; END CASE; RETURN ‘Operation ‘ || operation || ‘ succeeds.’; END; $$; This procedure: Packaging Service Specifications Service creation requires specification files, which must be included in the app package (typically alongside the manifest.yml). These files define the service