CFN or CLI to deploy lambda layer from Serverless Application Repository?

Thanks. That's what I do now to USE the layer (I grab the ARN from the deployed CFN resource using the console). I want to automate the deployment process (and retrieval of the ARN) so I don't need to use the console.

Hi, above does not use the console, as it handles provisioning via CFN. You could store a configuration or mapping which Holds the information of the layer ARN WITHIN your cloud formation template, as the layer ARN is a static string.

If you instead want to dynamically retrieve the layer ARN from the SAR site, you can try and look into this: https://docs.aws.amazon.com/serverlessrepo/latest/devguide/serverlessrepo-api-permissions-ref.html or CLI https://docs.aws.amazon.com/cli/latest/reference/serverlessrepo/list-applications.html to list application programmatically

@alatech Thanks for your links that you posted. They helped get me down the road. I will be posting a detailed answer soon.

Thanks for the detailed response. I'd like to reiterate that I want to do all of this in a CI/CD process, so I can not use the console. I could do everything you suggest in "Using CFN Template", but if I'm in the console I may as well just hit the Deploy button and manually copy the ARN as I do now.

Second, I do not see list-layers as an option in the AWC CLI V2 aws serverlessrepo command?

Thanks again for taking the time to post this detailed reply.

Hi Los Alamos Al,

Thanks for your feedback. I understand that you want to automate the deployment of the Lambda layer from the AWS Serverless Application Repository (SAR) in your CI/CD process.

To do this, you can use the AWS CLI to deploy the layer from a shell script or CFN file. The following code snippet shows how to deploy the layer from a shell script:

#!/bin/bash

# Install the AWS CLI
aws-cli

# List the available layers
aws serverlessrepo list-layers

# Find the ARN of the layer that you want to deploy
layer_arn=$(aws serverlessrepo list-layers | jq -r ".Layers[].Arn")

# Deploy the layer
aws serverlessrepo deploy-layer --layer-arn $layer_arn

To deploy the layer from a CFN file, you can use the following code snippet:

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Resources": {
    "MyLambdaLayer": {
      "Type": "AWS::Serverlessrepo::Layer",
      "Properties": {
        "LayerName": "MyLambdaLayer",
        "ContentUri": "https://example.com/my-lambda-layer.zip"
      }
    }
  }
}

Once you have created the shell script or CFN file, you can deploy the layer by running the following command:

# Deploy the layer from a shell script
bash deploy_lambda_layer.sh

# Deploy the layer from a CFN file
aws cloudformation deploy -f deploy_lambda_layer.yaml

I hope this helps!

@Neerajskydiver Thanks again for taking the time to post a detailed response. However, as I mentioned in my first comment, list-layers is not a subcommand on the aws serverlessrepo command (it's on the aws lambda command). Nonetheless, your post did help me find a solution which I will be posting as a answer soon.