feat(aws-ecs-patterns): adding support for custom HealthCheck while c…

…reating QueueProcessingFargateService (aws#18219)

The `QueueProcessingFargateService` construct internally creates a service Container with the default healthcheck that cannot currently be overriden by the user. This change allows users to optionally provide a custom healthcheck that can be passed on to the internal ECS container definition.

fixes aws#15636

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk/aws-ecs-patterns/README.md

@@ -544,6 +544,26 @@ const queueProcessingFargateService = new ecsPatterns.QueueProcessingFargateServ
 });
 ```
 
+### Set a custom container-level Healthcheck for QueueProcessingFargateService
+
+```ts
+declare const vpc: ec2.Vpc;
+declare const securityGroup: ec2.SecurityGroup;
+const queueProcessingFargateService = new ecsPatterns.QueueProcessingFargateService(this, 'Service', {
+  vpc,
+  memoryLimitMiB: 512,
+  image: ecs.ContainerImage.fromRegistry('test'),
+  healthCheck: {
+    command: [ "CMD-SHELL", "curl -f http://localhost/ || exit 1" ],
+    // the properties below are optional
+    interval: Duration.minutes(30),
+    retries: 123,
+    startPeriod: Duration.minutes(30),
+    timeout: Duration.minutes(30),
+  },
+});
+```
+
 ### Set capacityProviderStrategies for QueueProcessingEc2Service
 
 ```ts

packages/@aws-cdk/aws-ecs-patterns/lib/fargate/queue-processing-fargate-service.ts

@@ -1,5 +1,5 @@
 import * as ec2 from '@aws-cdk/aws-ec2';
-import { FargatePlatformVersion, FargateService, FargateTaskDefinition } from '@aws-cdk/aws-ecs';
+import { FargatePlatformVersion, FargateService, FargateTaskDefinition, HealthCheck } from '@aws-cdk/aws-ecs';
 import * as cxapi from '@aws-cdk/cx-api';
 import { Construct } from 'constructs';
 import { QueueProcessingServiceBase, QueueProcessingServiceBaseProps } from '../base/queue-processing-service-base';
@@ -69,6 +69,13 @@ export interface QueueProcessingFargateServiceProps extends QueueProcessingServi
    */
   readonly containerName?: string;
 
+  /**
+   * The health check command and associated configuration parameters for the container.
+   *
+   * @default - Health check configuration from container.
+   */
+  readonly healthCheck?: HealthCheck;
+
   /**
    * The subnets to associate with the service.
    *
@@ -127,6 +134,7 @@ export class QueueProcessingFargateService extends QueueProcessingServiceBase {
       environment: this.environment,
       secrets: this.secrets,
       logging: this.logDriver,
+      healthCheck: props.healthCheck,
     });
 
     // The desiredCount should be removed from the fargate service when the feature flag is removed.

packages/@aws-cdk/aws-ecs-patterns/test/fargate/integ.queue-processing-fargate-service-public.expected.json

@@ -604,6 +604,15 @@
               }
             ],
             "Essential": true,
+            "HealthCheck": {
+              "Command": [
+                "CMD-SHELL", 
+                "curl -f http://localhost/ || exit 1" 
+              ],
+              "Interval": 720,
+              "Retries": 34,
+              "Timeout": 5
+            },
             "Image": {
               "Fn::Join": [
                 "",

packages/@aws-cdk/aws-ecs-patterns/test/fargate/integ.queue-processing-fargate-service-public.ts

@@ -1,7 +1,7 @@
 import * as path from 'path';
 import * as ec2 from '@aws-cdk/aws-ec2';
 import * as ecs from '@aws-cdk/aws-ecs';
-import { App, Stack } from '@aws-cdk/core';
+import { App, Stack, Duration } from '@aws-cdk/core';
 
 import { QueueProcessingFargateService } from '../../lib';
 
@@ -14,6 +14,11 @@ new QueueProcessingFargateService(stack, 'PublicQueueService', {
   memoryLimitMiB: 512,
   image: new ecs.AssetImage(path.join(__dirname, '..', 'sqs-reader')),
   assignPublicIp: true,
+  healthCheck: {
+    command: ['CMD-SHELL', 'curl -f http://localhost/ || exit 1'],
+    interval: Duration.minutes(12),
+    retries: 34,
+  },
 });
 
 app.synth();