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__main__.py
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__main__.py
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"""Copyright 2016-2019, Pulumi Corporation. All rights reserved."""
import pulumi
import pulumi_aws as aws
import pulumi_aws.config
from pulumi import Output
import json
# The location of the built dotnet3.1 application to deploy
dotnet_application_publish_folder = "./app/bin/Debug/netcoreapp3.1/publish"
dotnet_application_entry_point = "app::app.Functions::GetAsync"
# The stage name to use for the API Gateway URL
custom_stage_name = "api"
#################
## DynamoDB Table
#################
# A DynamoDB table with a single primary key
counter_table = aws.dynamodb.Table("counterTable",
attributes=[
{
"name": "Id",
"type": "S",
},
],
hash_key="Id",
read_capacity=1,
write_capacity=1,
)
##################
## Lambda Function
##################
# Give our Lambda access to the Dynamo DB table, CloudWatch Logs and Metrics.
# Python package does not have assumeRolePolicyForPrinciple
instance_assume_role_policy = aws.iam.get_policy_document(statements=[{
"actions": ["sts:AssumeRole"],
"principals": [{
"identifiers": ["lambda.amazonaws.com"],
"type": "Service",
}],
}])
role = aws.iam.Role("mylambda-role",
assume_role_policy=instance_assume_role_policy.json,
)
policy = aws.iam.RolePolicy("mylambda-policy",
role=role,
policy=Output.from_input({
"Version": "2012-10-17",
"Statement": [{
"Action": ["dynamodb:UpdateItem", "dynamodb:PutItem", "dynamodb:GetItem",
"dynamodb:DescribeTable"],
"Resource": counter_table.arn,
"Effect": "Allow",
}, {
"Action": ["logs:*", "cloudwatch:*"],
"Resource": "*",
"Effect": "Allow",
}],
}),
)
# Read the config of whether to provision fixed concurrency for Lambda
config = pulumi.Config()
provisioned_concurrent_executions = config.get_float('provisionedConcurrency')
# Create a Lambda function, using code from the `./app` folder.
lambda_func = aws.lambda_.Function("mylambda",
opts=pulumi.ResourceOptions(depends_on=[policy]),
runtime="dotnetcore3.1",
code=pulumi.AssetArchive({
".": pulumi.FileArchive(dotnet_application_publish_folder),
}),
timeout=300,
handler=dotnet_application_entry_point,
role=role.arn,
publish=bool(provisioned_concurrent_executions),
# Versioning required for provisioned concurrency
environment={
"variables": {
"COUNTER_TABLE": counter_table.name,
},
},
)
if provisioned_concurrent_executions:
concurrency = aws.lambda_.ProvisionedConcurrencyConfig("concurrency",
function_name=lambda_func.name,
qualifier=lambda_func.version,
provisioned_concurrent_executions=1
)
#####################
## APIGateway RestAPI
######################
# Create the Swagger spec for a proxy which forwards all HTTP requests through to the Lambda function.
def swagger_spec(lambda_arn):
swagger_spec_returns = {
"swagger": "2.0",
"info": {"title": "api", "version": "1.0"},
"paths": {
"/{proxy+}": swagger_route_handler(lambda_arn),
},
}
return json.dumps(swagger_spec_returns)
# Create a single Swagger spec route handler for a Lambda function.
def swagger_route_handler(lambda_arn):
region = pulumi_aws.config.region
uri_string = 'arn:aws:apigateway:{region}:lambda:path/2015-03-31/functions/{lambdaArn}/invocations'.format(
region=region, lambdaArn=lambda_arn)
return ({
"x-amazon-apigateway-any-method": {
"x-amazon-apigateway-integration": {
"uri": uri_string,
"passthroughBehavior": "when_no_match",
"httpMethod": "POST",
"type": "aws_proxy",
},
},
})
# Create the API Gateway Rest API, using a swagger spec.
rest_api = aws.apigateway.RestApi("api",
body=lambda_func.arn.apply(lambda lambda_arn: swagger_spec(lambda_arn)),
)
# Create a deployment of the Rest API.
deployment = aws.apigateway.Deployment("api-deployment",
rest_api=rest_api,
# Note: Set to empty to avoid creating an implicit stage, we'll create it
# explicitly below instead.
stage_name="")
# Create a stage, which is an addressable instance of the Rest API. Set it to point at the latest deployment.
stage = aws.apigateway.Stage("api-stage",
rest_api=rest_api,
deployment=deployment,
stage_name=custom_stage_name,
)
# Give permissions from API Gateway to invoke the Lambda
invoke_permission = aws.lambda_.Permission("api-lambda-permission",
action="lambda:invokeFunction",
function=lambda_func,
principal="apigateway.amazonaws.com",
source_arn=deployment.execution_arn.apply(
lambda execution_arn: execution_arn + "*/*"),
)
# Export the https endpoint of the running Rest API
pulumi.export("endpoint", deployment.invoke_url.apply(lambda url: url + custom_stage_name))