py-lambda-action

A Github Action to deploy AWS Lambda functions written in Python with their dependencies in a separate layer. For now, only works with Python 3.6.

Use

Doesn't take any arguments. Deploys everything in the repo as code to the Lambda function, and installs/zips/deploys the dependencies as a separate layer the function can then immediately use.

Structure

• Lambda code should be structured normally/as Lambda would expect it.

• Dependencies must be stored in a requirements.txt.

  Environment variables

  Stored as secrets or env vars, doesn't matter. But also please don't put your AWS keys outside Secrets.

• AWS Credentials
  That includes the AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, etc. It's used by awscli, so the docs for that can be found here.
• LAMBDA_LAYER_ARN
  The ARN for the Lambda layer the dependencies should be pushed to without the version (every push is a new version).

• LAMBDA_FUNCITON_NAME
  The Lambda function name. From the AWS docs, it can be any of the following:

  • Function name - my-function
  • Function ARN - arn:aws:lambda:us-west-2:123456789012:function:my-function
  • Partial ARN - 123456789012:function:my-function
• BRANCH (optional)
  If the action should only be executed on a certain branch (e.g. master).

Example workflow

workflow "Build & deploy" {
  on = "push"
  resolves = ["py-lambda-deploy"]
}

action "py-lambda-deploy" {
  uses = "mariamrf/py-lambda-action@master"
  secrets = [
    "AWS_ACCESS_KEY_ID",
    "AWS_SECRET_ACCESS_KEY",
    "AWS_DEFAULT_REGION",
    "LAMBDA_FUNCTION_NAME",
    "LAMBDA_LAYER_ARN",
  ]
  env = {
    BRANCH = "master"
  }
}