1. Deploying Microservices for Machine Learning Inference on AWS Lightsail


    Deploying microservices, particularly for a machine learning inference workload on AWS, involves several steps. AWS Lightsail is a great option for this use case because it simplifies the deployment and management of applications and services. Here, we will look at using Pulumi to script the creation of a microservice deployment on AWS Lightsail which could serve a machine learning model inference.

    First, we'll provision a container service on AWS Lightsail. AWS Lightsail Container Service is a fully managed container orchestration service that makes it easy to deploy, manage, and scale containerized applications. It's a convenient choice for running microservices because it abstracts away much of the underlying infrastructure management.

    Following are the key steps and resources we will use in the Pulumi program to deploy the container service:

    1. Container Service:

      • We will define a container service which will allow us to specify the power and scale of the service. We can define the number of vCPUs and amount of RAM, and the number of container instances to run our service.
    2. Container Deployment:

      • This defines the actual deployment, including the Docker image to be used for the microservice, ports that need to be exposed, environment variables, and more. For a machine learning inference service, the Docker image would typically contain your inference code and dependencies.
    3. Domain and Domain Entry:

      • Optionally, if you want to expose your service to the public internet with a human-friendly domain name, you can create a domain entry resource that points to the public domain name provided by Lightsail.
    4. Database (if needed):

      • If your microservice requires database access, you can create a Lightsail database. In a machine learning context, this might be used for storing inference logs or user data.
    5. Bucket (if required):

      • For storing objects like model artifacts, you could use a Lightsail bucket. This is AWS's simplified version of S3, and it's particularly useful for smaller scale services on Lightsail.
    6. Distribution:

      • If you require a content delivery network to distribute your service, AWS Lightsail Distribution is the equivalent of AWS CloudFront. It serves content with low latency and high transfer speeds.

    Let's build the Pulumi program, which will script the deployment of a container service on AWS Lightsail that can serve as the basis for a machine learning inference service.

    import pulumi import pulumi_aws as aws # Create a new Lightsail container service. container_service = aws.lightsail.ContainerService("ml-inference-service", power="nano", # You can choose between nano, micro, small, medium, large, or xlarge scale=1, # Number of instances to deploy ) # Define the microservice container properties. This assumes you have a Docker image ready for ML inference. container = aws.lightsail.Container("inference-container", container_service_name=container_service.name, image="my-repo/my-inference-service:latest", ports={"8080": "HTTP"}, environment={ "MODEL_PATH": "s3://my-model-bucket/model.tar.gz", } ) # Register a domain for the service (optional and assumes domain already exists within Lightsail). domain = aws.lightsail.DomainEntry("inference-service-domain", domain_name="mydomain.com", target=container_service.url, ) # Deploy and set up the container. deployment_version = container_service.add_on.apply( lambda add_on: "v1" if add_on else "v2" ) container_deployment = aws.lightsail.ContainerDeploymentVersion("inference-deployment", container_service_name=container_service.name, version=deployment_version, state="ACTIVE", public_endpoint={ "container_name": container.name, "container_port": 8080, "health_check": { "path": "/health", "interval_seconds": 10, "timeout_seconds": 2, "unhealthy_threshold": 2, "healthy_threshold": 2, }, }, ) # Optionally create a Lightsail database (only if needed by your application). # Define the relational database instance. database = aws.lightsail.Database("inference-database", availability_zone="us-west-2a", blueprint_id="mysql", bundle_id="mysql_medium", # Change as per requirement master_database_name="inference_db", master_username="dbadmin", master_password="TopSecretPassword", tags={ "Environment": "Production", "Purpose": "MLInferenceDatabase", }, ) # Output the public URL of the service. pulumi.export('container_service_url', container_service.url) # Output the public URL of the database if created. pulumi.export('database_endpoint', database.master_endpoint)

    Each of these steps helps set up the environment for running a machine learning inference microservice in AWS Lightsail using Pulumi:

    • Container Service: This establishes the runtime environment for the microservices scaled to the desired capacity.
    • Microservice Container: Here you provide the actual code/logic for the machine learning inference in a Docker container.
    • Domain Entry: Mapping a domain to your service's endpoint for easier access if needed.
    • Database: Setting up a database if persistence storage is required for the microservice.
    • Output: Exporting the service URLs for easy access to the endpoints.

    Remember to replace the placeholders such as Docker image path (my-repo/my-inference-service:latest), your domain (mydomain.com) and the S3 object path for the model (s3://my-model-bucket/model.tar.gz) with actual values specific to your project. Also, the master password for the database should be secured and not hardcoded into your code, and be aware of the Lightsail service limits when choosing your plan size (power) and the number of instances to run (scale).