Code Deploy

Introduction

• A deployment service that automates application deployments to

  • EC2 instances

  • on-premises instances

  • Lambda

  • ECS

• Does not launch AWS resources automatically like CloudFormation, Opsworks, and Elastic Beanstalk.

Feature

• Deploy to EC2

  • Define how to deploy the application using appspec.yml + strategy

  • Will do in-place update (take off partial v1, provision v2, replace all in the end) to your fleet of EC2 instances

  • Can use hooks to verify the deployment after each deployment phase

• CodeDeploy to ASG

  • In-place updates

    • Updates current existing EC2 instances

    • Instances newly created by an ASG will also get automated deployments

  • Blue / Green Deployment

    • A new auto-scaling group is created (settings are copied)

    • Choose how long to keep the old instances

    • Must be using an ELB

• CodeDeploy to Lambda

  • Supports Blue / Green Deployments

    • Canary

    • Linear

    • All-at-once

  • Traffic Shifting with Lambda Alias

  • Pre / Post Traffic Hooks

    • Pre Traffic Hook: validate the v2

    • Post Traffic Hook: rollback to v1 / clean up

  • Easy & automated rollback using CloudWatch Alarms

  • SAM framework natively uses CodeDeploy

• CodeDeploy to ECS

  • Supports Blue / Green Deployments for ECS / ECS Fargate

    • Canary

    • Linear

    • All-at-once

  • Setup is done within the ECS Service definition

  • A new task set is created, and traffic is re-routed to the new task test.

  • Then if everything is stable for X minutes, the old task set is terminated.