Chumarat Pat

Chumarat Pat

1598585765

How to Deploy Your AWS Lambda Functions with CloudFormation

AWS Lambda is a powerful tool for developing serverless applications and on-demand workflows. However, this power comes at a cost in terms of flexibility and ease of deployment, as the manual deployment process that AWS Lambda recommends can be error-prone and hard to scale.

CloudFormation revolutionizes this process,  replacing copied zip files with dependable and repeatable template-based deployment schemes. With CloudFormation, your Lambda functions will be easier to maintain, easier for your developers to understand, and easier to scale as your application grows.

#programming #serverless #aws-lambda #aws

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Buddha Community

How to Deploy Your AWS Lambda Functions with CloudFormation
Luna  Hermann

Luna Hermann

1594377780

Calling an AWS Lambda function from another Lambda function

In this article, I am going to explain how to create an AWS Lambda function and then call this function from another Lambda function within the same region. This is a useful scenario in which we may need to execute a second lambda function based on the outcome of some previous logic. Another scenario may be to execute a second lambda function several times by using different parameters.

For the sake of this article, we will consider a typical retailer application, in which we can purchase different products from a retailer site using a lambda function.

Architecture Diagram

Figure 1 – Architecture Diagram

If you consider the above architecture diagram, you can see that we have an AWS lambda function – the ParentFunction, which assumes a specific role from the IAM (Invoke Other Lambda Function) and then calls another lambda function – the ChildFunction with a payload. Once the execution of the ChildFunction is completed, it returns a response, which is then passed on to the ParentFunction. The ParentFunction receives the response and handles the job accordingly.

As in this example, let us assume that the ParentFunction is going to call the ChildFunction with a payload of ProductName, Quantity, and the UnitPrice of that product. The ChildFunction, in turn, will process this payload, calculate the total sales amount, generate a transaction reference ID, and return this information to the ParentFunction.

Creating the first AWS Lambda Function – ChildFunction

Let us first go ahead and create the ChildFunction, which will process the input payload and return the results to the ParentFunction.

#aws rds #functions #aws #lambda function

Ray  Patel

Ray Patel

1619510796

Lambda, Map, Filter functions in python

Welcome to my Blog, In this article, we will learn python lambda function, Map function, and filter function.

Lambda function in python: Lambda is a one line anonymous function and lambda takes any number of arguments but can only have one expression and python lambda syntax is

Syntax: x = lambda arguments : expression

Now i will show you some python lambda function examples:

#python #anonymous function python #filter function in python #lambda #lambda python 3 #map python #python filter #python filter lambda #python lambda #python lambda examples #python map

Deno Developer

Deno Developer

1590055437

Deploying AWS Lambda functions using AWS CloudFormation

The idea behind AWS Lambda is great — no servers or software to manage sounds very attractive to me as a developer. But it turned out that managing Lambda functions is not trivial as well. Apart from many new concepts and tools provided by AWS, there are several 3rd-party tools built to help you deal with AWS Lambda. Those tools require you to learn many new concepts and interfaces which may be tough for a beginner. Therefore, I created a starter kit project which will help you to start using NodeJS Lambda functions and learning the AWS Lambda stack.

The starter kit uses the official AWS CLI and CloudFormation to manage Lambda resources. No other dependencies are required. The starter kit glues various AWS CLI commands via several very basic shell scripts so it is easy to learn and change. Additionally, the starter kit unlike many other projects out there is using YAML for writing CloudFormation templates so that templates become much easier to read.

#aws #lambda #nodejs #cloudformation #yaml

 A Powerful NodeJS Framework to Manage Your AWS Lambda Functions.

When working with AWS services, you’ve got several choices to build and deploy your lambda functions: Serverless Framework, AWS Amplify Framework, and AWS SAM CLI are the three most popular toolkit today. Each of them has different pros and cons. The cons you will get just happens after your project sized to be a complex solution beyond their pre-designed, intended purpose. In this article, I want to introduce yet another choice for your work with less locked-in, highly customization, and ultimate control of your Infrastructure as Code solution.

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What is Simplify-SDK? This is a JavaScript SDK that helps your DevOp integration easier by adding deployment steps inline to your project solution. You will never want to be locked into any vendor for a tool you use. In FaaS architecture, a function can be very small but a project needs some (3–100) functions to orchestrate a workload. One CI/CD tool for all of them is quite hard to deploy your project when you just need to manage a stand-alone function.

#aws #simplify-framework #cloudformation #nodejs #lambda #function

Cross-account access to invoke AWS lambda using AWS CDK

If you are here, you may have a pretty good knowledge of how to use AWS CDK for defining cloud infrastructure in code and provisioning it through AWS. So let’s get started on how to grant permission to your lambda function to access the resources in another AWS account.

Let’s say you have two accounts called Account A and Account B, and you need to give permission to lambda function in Account A (ex: 11111111)to access the resources in Account B(22222222). You can easily do this by assuming an IAM Role in Account B and then uses the returned credentials to invoke AWS resources in Account B.

#acces #account #aws #lambda #aws lambda #aws cdk