DO NOT USE, THIS IS PRE-ALPHA, HAS NO TESTS

tc-sam-cli

A very simplified tool wrapped around aws-sam-cli to deploy aws lambda.

Works together with tclambda

Configuration

[Default]
StackName = "tc-sam-playground"
S3CodeBucket = "tc-sam-bucket"

[[ExtraPolicies]]
Effect = "Allow"
Action = ["dynamodb:*"]
Resource = "arn:aws:dynamodb:eu-west-1:1234:table/myTable"

[Functions.MyLambda]
CodeUri = "mylambda/"
Handler = "app.handler"
Runtime = "python3.7"
MemorySize = 256
Timeout = 60
ReservedConcurrentExecutions = 1
BatchSize = 10

[Functions.MyLambda.Environment]
MY_KEY = "my value"

[Functions.TcLambda.Events.Ping]
Schedule = "rate(1 minute)"
Function = "ping"

# More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
[Functions.TcLambda.Api.Webhook]
Path = "/hello"
Method = "post"


[Functions.Numpy]
CodeUri = "numpy/"
Handler = "app.handler"
Runtime = "python3.7"
MemorySize = 256
Timeout = 60
Tracing = true

Generate AWS SAM template

After every change in tc-sam.toml the template must be regenerated.

$ tc-sam generate_template > template.yml

It's recommended to have template.yml under source control.

Every Lambda has given access to each other's SQS Queue, and all Lambdas share the same S3 bucket for results.

Deploy

Deploy is very straightforward, it builds the sam package and deploys the cloudformation stack.

$ tc-sam deploy

Environmental export

$ tc-sam env_export
TC_NUMPY_QUEUE="https://sqs.eu-west-1.amazonaws.com/123/tc-sam-playground-NumpySqs-ABC"
TC_NUMPY_BUCKET="tc-sam-playground-resultbucket-123456"
TC_MYLAMBDA_QUEUE="https://sqs.eu-west-1.amazonaws.com/123/tc-sam-playground-TcLambdaSqs-ABC"
TC_MYLAMBDA_BUCKET="tc-sam-playground-resultbucket-123456"

These settings can be copied to other projects that will use the aws lambdas.

Ping all lambdas

The tclambda handler comes with a ping command to test if both permissions to SQS and S3 are allowed.

$ tc-sam ping
Ping NUMPY
Ping MYLAMBDA
Pong NUMPY
Pong MYLAMBDA