There are currently three types of managed load balancers offered by AWS. Application Load Balancer: This load balancer operates at Layer 7 of the OSI model. It can be used to load-balance HTTP and HTTPS applications and can invoke Lambda functions, among several other features. Network Load Balancer: Used for extreme performance, this load balancer operates at Layer 4 of the OSI model. It can, therefore, load-balance any kind of TCP traffic and can handle large amounts of requests with low latency. Classic Load Balancer: This load balancer operates at Layer 4 or Layer 7 of the OSI model. I

AWS CodeCommit is essentially a managed service—i.e. Amazon manages and scales it behind the scenes for you, just like S3—for Git-based source control. AWS CodeBuild is used to build, test, and generate artifacts—files that are generated from successful build steps—for deployment. This, too, is a managed service, doing provisioning and scaling automatically. AWS CodeDeploy automates application deployments to several types of compute resources such as EC2 instances or ECS clusters. AWS CodePipeline is a continuous delivery service that allows automating and integrating build, test, and depl

All at once: This is the fastest mode. In this case, Elastic Beanstalk will simply stop all the running instances and then will deploy the new version to these instances. Immutable: In this mode, Elastic Beanstalk will create a new Auto Scaling Group and deploy the new instances there. Then, if the deployment succeeds, it will replace the old Auto Scaling Group with the newly created one. Rolling: During the deployment, Elastic Beanstalk will deploy the new application version to some of the currently running instances, and repeat that process until all instances are running the same version