Can cloud formation interact with lambda?

Using AWS CloudFormation to deploy AWS Lambda functions provides a reliable, reproducible and version-able deployment mechanism. But while simple deployments are easily achieved, it can be challenging to produce templates that seamlessly deploy to any AWS Region supported by Lambda.

How do you trigger Lambda function in CloudFormation?

5 Answers

1. Manually create an SNS Topic.
2. Add a Custom Resource referencing a Lambda function to be called on creation.
3. Add the Lambda function reference to a Stack Output, then write a simple script that performs the stack creation and then manually invokes the Lambda function afterwards.

How do you deploy lambda in CloudFormation?

In order to deploy both a Lambda function and the S3 bucket in which it resides, you must first deploy the CloudFormation stack with the S3 bucket, put the Lambda function deployment package in the S3 bucket, then specify the S3 bucket and object key in the CloudFormation template for the Lambda function resource …

Which section of CloudFormation template should be used to define lambda resources?

To automatically deploy a Lambda function, we will add information under the Resources section. Create a YAML file for your new template (this tutorial will use YAML, but CloudFormation also supports JSON format). Under the Resources section, we’ll start by defining the Identity and Access Management (IAM) Role.

What is Lambda execution role?

A Lambda function’s execution role is an AWS Identity and Access Management (IAM) role that grants the function permission to access AWS services and resources. You can create an execution role for development that has permission to send logs to Amazon CloudWatch and to upload trace data to AWS X-Ray.

How do I deploy lambda in AWS?

Using the Lambda console

1. Open the Functions page on the Lambda console.
2. Select a function.
3. In the Code Source pane, choose Upload from and then . zip file.
4. Choose Upload to select your local . zip file.
5. Choose Save.

What is Lambda function name?

The name of the Lambda function, up to 64 characters in length. If you don’t specify a name, AWS CloudFormation generates one. If you specify a name, you cannot perform updates that require replacement of this resource. You can perform updates that require no or some interruption.

What is Lambda Arn?

An Amazon Resource Name (ARN) is a file naming convention used to identify a particular resource in AWS and they uniquely identify AWS resources. If you successfully created a Lambda function (Independently if it is triggered by Alexa Skills Kit or not) you will get an ARN.

What is lambda function name?

What is a lambda layer?

A Lambda layer is an archive containing additional code, such as libraries, dependencies, or even custom runtimes. By moving runtime dependencies from your function code to a layer, this can help reduce the overall size of the archive uploaded during a deployment.

Where is Lambda execution role?

To view a function’s execution role Open the Functions page on the Lambda console. Choose a function. Choose Configuration and then choose Permissions. Under Resource summary, view the services and resources that the function can access.

What can trigger Lambda?

An up-to-date list of services that can trigger lambda asynchronous from AWS:

• Amazon Simple Storage Service.
• Amazon Simple Notification Service.
• Amazon Simple Email Service.
• AWS CloudFormation.
• Amazon CloudWatch Logs.
• Amazon CloudWatch Events.
• AWS CodeCommit.
• AWS Config.

How are lambda functions specified in CloudFormation resources?

Lambda Function Resources. Lambda functions can be specified as CloudFormation resources (here’s the full docs). There are two functions we need to specify; one to take the EBS snapshots and one to clean up expired snapshots.

What does execution role mean in AWS Lambda?

The execution role grants the function permission to use AWS services, such as Amazon CloudWatch Logs for log streaming and AWS X-Ray for request tracing. To declare this entity in your AWS CloudFormation template, use the following syntax:

When to create an IAM role for a lambda function?

When you first create an IAM role for your Lambda function during the development phase, you might sometimes grant permissions beyond what is required. Before publishing your function in the production environment, best practice is to adjust the policy to include only the required permissions.

Do you need execution role for CloudFormation functions?

CloudFormation creates the new resource before deleting the old one, except in cases where naming constraints would prevent it from doing so. One such case is S3 buckets. To run our functions, we need an execution role to grant the functions permission to view EC2 instances and take snapshots.