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CodeDeploy is a deployment service that automates application deployments to Amazon EC2 instances, on-premises instances, serverless Lambda functions, or Amazon ECS services.
You can deploy a nearly unlimited variety of application content, including:
Code
Serverless AWS Lambda functions
Web and configuration files
Executables
Packages
Scripts
Multimedia files
CodeDeploy can deploy application content that runs on a server and is stored in Amazon S3 buckets, GitHub repositories, or Bitbucket repositories. CodeDeploy can also deploy a serverless Lambda function. You do not need to make changes to your existing code before you can use CodeDeploy.
CodeDeploy makes it easier for you to:
Rapidly release new features.
Update AWS Lambda function versions.
Avoid downtime during application deployment.
Handle the complexity of updating your applications, without many of the risks associated with error-prone manual deployments.
The service scales with your infrastructure so you can easily deploy to one instance or thousands.
CodeDeploy works with various systems for configuration management, source control, continuous integration, continuous delivery, and continuous deployment. For more information, see Product integrations.
The CodeDeploy console also provides a way to quickly search for your resources, such as repositories, build projects, deployment applications, and pipelines. Choose Go to resource or press the / key, and then type the name of the resource. Any matches appear in the list. Searches are case insensitive. You only see resources that you have permissions to view.
Benefits of AWS CodeDeploy
CodeDeploy offers these benefits:
Server, serverless, and container applications. CodeDeploy lets you deploy both traditional applications on servers and applications that deploy a serverless AWS Lambda function version or an Amazon ECS application.
Automated deployments. CodeDeploy fully automates your application deployments across your development, test, and production environments. CodeDeploy scales with your infrastructure so that you can deploy to one instance or thousands.
Minimize downtime. If your application uses the EC2/On-Premises compute platform, CodeDeploy helps maximize your application availability. During an in-place deployment, CodeDeploy performs a rolling update across Amazon EC2 instances. You can specify the number of instances to be taken offline at a time for updates. During a blue/green deployment, the latest application revision is installed on replacement instances. Traffic is rerouted to these instances when you choose, either immediately or as soon as you are done testing the new environment. For both deployment types, CodeDeploy tracks application health according to rules you configure.
Stop and roll back. You can automatically or manually stop and roll back deployments if there are errors.
Centralized control. You can launch and track the status of your deployments through the CodeDeploy console or the AWS CLI. You receive a report that lists when each application revision was deployed and to which Amazon EC2 instances.
Easy to adopt. CodeDeploy is platform-agnostic and works with any application. You can easily reuse your setup code. CodeDeploy can also integrate with your software release process or continuous delivery toolchain.
Concurrent deployments. If you have more than one application that uses the EC2/On-Premises compute platform, CodeDeploy can deploy them concurrently to the same set of instances.
Overview of CodeDeploy compute platforms
CodeDeploy is able to deploy applications to three compute platforms:
EC2/On-Premises: Describes instances of physical servers that can be Amazon EC2 cloud instances, on-premises servers, or both. Applications created using the EC2/On-Premises compute platform can be composed of executable files, configuration files, images, and more.
Deployments that use the EC2/On-Premises compute platform manage the way in which traffic is directed to instances by using an in-place or blue/green deployment type. For more information, see Overview of CodeDeploy deployment types.
AWS Lambda: Used to deploy applications that consist of an updated version of a Lambda function. AWS Lambda manages the Lambda function in a serverless compute environment made up of a high-availability compute structure. All administration of the compute resources is performed by AWS Lambda. For more information, see Serverless Computing and Applications. For more information about AWS Lambda and Lambda functions, see AWS Lambda.
You can manage the way in which traffic is shifted to the updated Lambda function versions during a deployment by choosing a canary, linear, or all-at-once configuration.
Amazon ECS: Used to deploy an Amazon ECS containerized application as a task set. CodeDeploy performs a blue/green deployment by installing an updated version of the application as a new replacement task set. CodeDeploy reroutes production traffic from the original application task set to the replacement task set. The original task set is terminated after a successful deployment. For more information about Amazon ECS, see Amazon Elastic Container Service.
You can manage the way in which traffic is shifted to the updated task set during a deployment by choosing a canary, linear, or all-at-once configuration.
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