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Serverless is a new framework that allows developers to easily harness AWS Lambda and Api Gateway to build and deploy full fledged API services without needing to deal with any ops level overhead or paying for servers when they're not in use. It's kinda like Heroku on-demand for single functions.
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In this video titled "Going Serverless," Jeremy Greene discusses the concept of serverless architecture, particularly focusing on the use of the Serverless Framework with AWS Lambda and API Gateway. The term 'serverless' refers to a method of deploying applications without needing to manage servers directly, allowing developers to concentrate on writing code rather than dealing with infrastructure. Jeremy emphasizes the benefits of using AWS services, such as operational efficiency and scalability, and addresses concerns regarding vendor lock-in. Key points discussed in the video include: - **Definition of Serverless**: Although the term suggests a lack of servers, there are servers in the background; the emphasis is on abstraction away from server management. - **Comparison to Heroku**: Similar to how Heroku simplifies deployment, the Serverless Framework provides a streamlined approach for deploying AWS Lambda functions. - **Advantages of AWS**: Using AWS allows developers to leverage extensive data center resources, operational expertise, and cost efficiencies related to deploying applications. - **Introducing the Serverless Framework**: This framework facilitates the management of AWS Lambda, API Gateway, and CloudFormation services through code, removing the complications of GUI management. - **How to Get Started**: Jeremy guides viewers through setting up a new AWS account and using the Serverless Framework, starting with creating a project and deploying functions via the command line. - **Demo of Function Creation**: A practical demonstration is provided, showing the creation of a function called 'left-pad' and how to set up routes and API endpoints using serverless.yml configuration files. - **Testing Functions**: Emphasizes the importance of testing serverless functions and suggests using Mocha and Chai for unit testing. - **Ruby Integration in AWS Lambda**: Jeremy discusses integrating Ruby within a serverless architecture, although it is not natively supported in AWS Lambda. - **Performance Considerations**: The concept of 'cold starts' and their impact on performance are explained, along with a comparison of execution times between Node.js and mruby functions. In conclusion, the video highlights that the Serverless Framework allows developers to efficiently integrate various AWS services and deploy applications without direct server management, paving the way for more agile development practices. By leveraging AWS resources through serverless architecture, developers can focus on enhancing application code rather than managing infrastructure details.
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