# README

CDK ECS CodeDeploy

This project contains CDK constructs to create CodeDeploy ECS deployments.

Installation

TypeScript

yarn add @cdklabs/cdk-ecs-codedeploy

Java

See https://mvnrepository.com/artifact/io.github.cdklabs/cdk-ecs-codedeploy

Python

See https://pypi.org/project/cdklabs.ecs-codedeploy/

See https://www.nuget.org/packages/Cdklabs.CdkEcsCodeDeploy/

Deployments

CodeDeploy for ECS can manage the deployment of new task definitions to ECS services. Only 1 deployment construct can be defined for a given EcsDeploymentGroup.

var deploymentGroup iEcsDeploymentGroup
var taskDefinition iTaskDefinition


cdklabscdkecscodedeploy.NewEcsDeployment(&EcsDeploymentProps{
	DeploymentGroup: DeploymentGroup,
	TargetService: &TargetService{
		TaskDefinition: *TaskDefinition,
		ContainerName: jsii.String("mycontainer"),
		ContainerPort: jsii.Number(80),
	},
})

The deployment will use the AutoRollbackConfig for the EcsDeploymentGroup unless it is overridden in the deployment:

var deploymentGroup iEcsDeploymentGroup
var taskDefinition iTaskDefinition


cdklabscdkecscodedeploy.NewEcsDeployment(&EcsDeploymentProps{
	DeploymentGroup: DeploymentGroup,
	TargetService: &TargetService{
		TaskDefinition: *TaskDefinition,
		ContainerName: jsii.String("mycontainer"),
		ContainerPort: jsii.Number(80),
	},
	AutoRollback: &AutoRollbackConfig{
		FailedDeployment: jsii.Boolean(true),
		DeploymentInAlarm: jsii.Boolean(true),
		StoppedDeployment: jsii.Boolean(false),
	},
})

By default, the deployment will timeout after 30 minutes. The timeout value can be overridden:

var deploymentGroup iEcsDeploymentGroup
var taskDefinition iTaskDefinition


cdklabscdkecscodedeploy.NewEcsDeployment(&EcsDeploymentProps{
	DeploymentGroup: DeploymentGroup,
	TargetService: &TargetService{
		TaskDefinition: *TaskDefinition,
		ContainerName: jsii.String("mycontainer"),
		ContainerPort: jsii.Number(80),
	},
	Timeout: awscdk.Duration_Minutes(jsii.Number(60)),
})

API Canaries

CodeDeploy can leverage Cloudwatch Alarms to trigger automatic rollbacks. The ApiCanary construct simplifies the process for creating CloudWatch Synthetics Canaries to monitor APIs. The following code demonstrates a canary that monitors https://xkcd.com/908/info.0.json and checks the JSON response to assert that safe_title has the value of 'The Cloud'.

canary := cdklabscdkecscodedeploy.NewApiCanary(stack, jsii.String("Canary"), &ApiCanaryProps{
	BaseUrl: jsii.String("https://xkcd.com"),
	DurationAlarmThreshold: awscdk.Duration_Seconds(jsii.Number(5)),
	ThreadCount: jsii.Number(5),
	Steps: []apiTestStep{
		&apiTestStep{
			Name: jsii.String("info"),
			Path: jsii.String("/908/info.0.json"),
			JmesPath: jsii.String("safe_title"),
			ExpectedValue: jsii.String("The Cloud"),
		},
	},
})

Application Load Balanced CodeDeployed Fargate Service

An L3 construct named ApplicationLoadBalancedCodeDeployedFargateService extends ApplicationLoadBalancedFargateService and adds support for deploying new versions of the service with AWS CodeDeploy. Additionally, an Amazon CloudWatch Synthetic canary is created via the ApiCanary construct and is monitored by the CodeDeploy deployment to trigger rollback if the canary begins to alarm.

var cluster iCluster
var image containerImage

service := cdklabscdkecscodedeploy.NewApplicationLoadBalancedCodeDeployedFargateService(stack, jsii.String("Service"), &ApplicationLoadBalancedCodeDeployedFargateServiceProps{
	Cluster: Cluster,
	TaskImageOptions: &ApplicationLoadBalancedTaskImageOptions{
		Image: *Image,
	},
	ApiTestSteps: []apiTestStep{
		&apiTestStep{
			Name: jsii.String("health"),
			Path: jsii.String("/health"),
			JmesPath: jsii.String("status"),
			ExpectedValue: jsii.String("ok"),
		},
	},
})