lambda

Vespa Code examples for AWS Lambda functions

Find deployable code examples in the .py files. Make sure to start with the hello-example to make sure everything is set up, using the AWS console Test function.

https://docs.aws.amazon.com/lambda/latest/dg/python-package.html has a good description of how to create a package with dependencies - e.g.:

pip install --target ./package requests
cd package
zip -r ../my-deployment-package.zip .
cd ..
zip my-deployment-package.zip hello_function.py

You can have multiple python files in the same zip, write one handler per python file.

Create an AWS Lambda function (replace 123456789012 with your account ID):

$ aws --profile private lambda create-function \
  --package-type Zip \
  --function-name hello_function \
  --zip-file fileb://my-deployment-package.zip \
  --runtime python3.9 \
  --handler hello_function.hello_handler \
  --role arn:aws:iam::123456789012:role/service-role/testf-role-bx2kyrtj

The --profile parameter can be used to deploy to a give AWS account - omit if having just one. Refer to .aws/config and .aws/credentials.

After a Lambda function is created, update it using:

$ aws --profile private lambda update-function-code \
  --function-name hello_function \
  --zip-file fileb://my-deployment-package.zip

Refer to Google Cloud Functions for similar examples using Google Cloud.

Troubleshooting

• Creating a Lambda in the AWS console with auto-create a role you can later use in the --role parameter.
• Using the AWS console to modify the code and rerun is quicker than re-deploying.