# CDK ECS CodeDeploy
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This project contains CDK constructs to create CodeDeploy ECS deployments.
## Installation
<details><summary><strong>TypeScript</strong></summary>
```bash
yarn add @cdklabs/cdk-ecs-codedeploy
```
</details><details><summary><strong>Java</strong></summary>
See https://mvnrepository.com/artifact/io.github.cdklabs/cdk-ecs-codedeploy
</details><details><summary><strong>Python</strong></summary>
See https://pypi.org/project/cdklabs.ecs-codedeploy/
</details><details><summary><strong>C#</strong></summary>
See https://www.nuget.org/packages/Cdklabs.CdkEcsCodeDeploy/
</details>
### 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.
```python
declare const deploymentGroup: codeDeploy.IEcsDeploymentGroup;
declare const taskDefinition: ecs.ITaskDefinition;
new EcsDeployment({
deploymentGroup,
targetService: {
taskDefinition,
containerName: 'mycontainer',
containerPort: 80,
},
});
```
The deployment will use the AutoRollbackConfig for the EcsDeploymentGroup unless it is overridden in the deployment:
```python
new EcsDeployment({
deploymentGroup,
targetService: {
taskDefinition,
containerName: 'mycontainer',
containerPort: 80,
},
autoRollback: {
failedDeployment: true,
deploymentInAlarm: true,
stoppedDeployment: false,
},
});
```
By default, the deployment will timeout after 30 minutes. The timeout value can be overridden:
```python
new EcsDeployment({
deploymentGroup,
targetService: {
taskDefinition,
containerName: 'mycontainer',
containerPort: 80,
},
timeout: Duration.minutes(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'`.
```python
const canary = new ApiCanary(stack, 'Canary', {
baseUrl: 'https://xkcd.com',
durationAlarmThreshold: Duration.seconds(5),
threadCount: 5,
steps: [
{
name: 'info',
path: '/908/info.0.json',
jmesPath: 'safe_title',
expectedValue: 'The Cloud',
},
],
});
```
### Application Load Balanced CodeDeployed Fargate Service
An L3 construct named `ApplicationLoadBalancedCodeDeployedFargateService` extends [ApplicationLoadBalancedFargateService](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ecs_patterns.ApplicationLoadBalancedFargateService.html) 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.
```python
declare const cluster: ecs.ICluster;
declare const image: ecs.ContainerImage;
const service = new ApplicationLoadBalancedCodeDeployedFargateService(stack, 'Service', {
cluster,
taskImageOptions: {
image,
},
apiTestSteps: [{
name: 'health',
path: '/health',
jmesPath: 'status',
expectedValue: 'ok',
}],
});
```
## Local Development
```bash
yarn install
yarn build
yarn test
```
To run an integration test and update the snapshot, run:
```bash
yarn integ:ecs-deployment:deploy
```
To recreate snapshots for integration tests, run:
```bash
yarn integ:snapshot-all
```
## Security
See [CONTRIBUTING](CONTRIBUTING.md#security-issue-notifications) for more information.
## License
This project is licensed under the Apache-2.0 License.