feat(apprunner): add HealthCheckConfiguration property in Service

packages/@aws-cdk/aws-apprunner-alpha/README.md

@@ -215,3 +215,25 @@ const service = new apprunner.Service(stack, 'Service', {
 
 service.addSecret('LATER_SECRET', apprunner.Secret.fromSecretsManager(secret, 'field'));
 ```
+
+## HealthCheck
+
+To configure the health check for the service, use the `healthCheck` attribute.
+
+You can specify it by static methods `HealthCheck.http` or `HealthCheck.tcp`.
+
+```ts
+new apprunner.Service(this, 'Service', {
+  source: apprunner.Source.fromEcrPublic({
+    imageConfiguration: { port: 8000 },
+    imageIdentifier: 'public.ecr.aws/aws-containers/hello-app-runner:latest',
+  }),
+  healthCheck: apprunner.HealthCheck.http({
+    healthyThreshold: 5,
+    interval: Duration.seconds(10),
+    path: '/',
+    timeout: Duration.seconds(10),
+    unhealthyThreshold: 10,
+  }),
+});
+```

packages/@aws-cdk/aws-apprunner-alpha/lib/service.ts

@@ -706,6 +706,15 @@ export interface ServiceProps {
    * @default - no VPC connector, uses the DEFAULT egress type instead
    */
   readonly vpcConnector?: IVpcConnector;
+
+  /**
+   * Settings for the health check that AWS App Runner performs to monitor the health of a service.
+   *
+   * You can specify it by static methods `HealthCheck.http` or `HealthCheck.tcp`.
+   *
+   * @default - no health check configuration
+   */
+  readonly healthCheck?: HealthCheck;
 }
 
 /**
@@ -848,6 +857,145 @@ export class GitHubConnection {
   }
 }
 
+/**
+ * The health check protocol type
+ */
+export enum HealthCheckProtocolType {
+  /**
+   * HTTP protocol
+   */
+  HTTP = 'HTTP',
+
+  /**
+   * TCP protocol
+   */
+  TCP = 'TCP',
+}
+
+/**
+ * Describes the settings for the health check that AWS App Runner performs to monitor the health of a service.
+ */
+interface HealthCheckCommonOptions {
+  /**
+   * The number of consecutive checks that must succeed before App Runner decides that the service is healthy.
+   *
+   * @default 1
+   */
+  readonly healthyThreshold?: number;
+
+  /**
+   * The time interval, in seconds, between health checks.
+   *
+   * @default Duration.seconds(5)
+   */
+  readonly interval?: cdk.Duration;
+
+  /**
+   * The time, in seconds, to wait for a health check response before deciding it failed.
+   *
+   * @default Duration.seconds(2)
+   */
+  readonly timeout?: cdk.Duration;
+
+  /**
+   * The number of consecutive checks that must fail before App Runner decides that the service is unhealthy.
+   *
+   * @default 5
+   */
+  readonly unhealthyThreshold?: number;
+}
+
+/**
+ * Properties used to define HTTP Based healthchecks.
+ */
+export interface HttpHealthCheckOptions extends HealthCheckCommonOptions {
+  /**
+   * The URL that health check requests are sent to.
+   *
+   * @default /
+   */
+  readonly path?: string;
+}
+
+/**
+ * Properties used to define TCP Based healthchecks.
+ */
+export interface TcpHealthCheckOptions extends HealthCheckCommonOptions { }
+
+/**
+ * Contains static factory methods for creating health checks for different protocols
+ */
+export class HealthCheck {
+  /**
+   * Construct a HTTP health check
+   */
+  public static http(options: HttpHealthCheckOptions = {}): HealthCheck {
+    return new HealthCheck(
+      HealthCheckProtocolType.HTTP,
+      options.healthyThreshold,
+      options.interval,
+      options.timeout,
+      options.unhealthyThreshold,
+      options.path,
+    );
+  }
+
+  /**
+   * Construct a TCP health check
+   */
+  public static tcp(options: TcpHealthCheckOptions = {}): HealthCheck {
+    return new HealthCheck(
+      HealthCheckProtocolType.TCP,
+      options.healthyThreshold,
+      options.interval,
+      options.timeout,
+      options.unhealthyThreshold,
+    );
+  }
+
+  private constructor(
+    public readonly healthCheckProtocolType: HealthCheckProtocolType,
+    public readonly healthyThreshold: number = 1,
+    public readonly interval: cdk.Duration = cdk.Duration.seconds(5),
+    public readonly timeout: cdk.Duration = cdk.Duration.seconds(2),
+    public readonly unhealthyThreshold: number = 5,
+    public readonly path?: string,
+  ) {
+    if (this.healthCheckProtocolType === HealthCheckProtocolType.HTTP) {
+      if (this.path !== undefined && this.path.length === 0) {
+        throw new Error('path length must be greater than 0');
+      }
+      if (this.path === undefined) {
+        this.path = '/';
+      }
+    }
+
+    if (this.healthyThreshold < 1 || this.healthyThreshold > 20) {
+      throw new Error(`healthyThreshold must be between 1 and 20, got ${this.healthyThreshold}`);
+    }
+    if (this.unhealthyThreshold < 1 || this.unhealthyThreshold > 20) {
+      throw new Error(`unhealthyThreshold must be between 1 and 20, got ${this.unhealthyThreshold}`);
+    }
+    if (this.interval.toSeconds() < 1 || this.interval.toSeconds() > 20) {
+      throw new Error(`interval must be between 1 and 20 seconds, got ${this.interval.toSeconds()}`);
+    }
+    if (this.timeout.toSeconds() < 1 || this.timeout.toSeconds() > 20) {
+      throw new Error(`timeout must be between 1 and 20 seconds, got ${this.timeout.toSeconds()}`);
+    }
+  }
+
+  public bind(): CfnService.HealthCheckConfigurationProperty {
+    return {
+      healthyThreshold: this.healthyThreshold,
+      interval: this.interval?.toSeconds(),
+      path: this.path,
+      protocol: this.healthCheckProtocolType,
+      timeout: this.timeout?.toSeconds(),
+      unhealthyThreshold: this.unhealthyThreshold,
+    };
+  }
+}
+
 /**
  * Attributes for the App Runner Service
  */
@@ -1097,6 +1245,9 @@ export class Service extends cdk.Resource implements iam.IGrantable {
           vpcConnectorArn: this.props.vpcConnector?.vpcConnectorArn,
         },
       },
+      healthCheckConfiguration: this.props.healthCheck ?
+        this.props.healthCheck.bind() :
+        undefined,
     });
 
     // grant required privileges for the role

packages/@aws-cdk/aws-apprunner-alpha/rosetta/default.ts-fixture

@@ -1,5 +1,5 @@
 // Fixture with packages imported, but nothing else
-import { Stack, SecretValue } from 'aws-cdk-lib';
+import { Duration, Stack, SecretValue } from 'aws-cdk-lib';
 import { Construct } from 'constructs';
 import * as apprunner from '@aws-cdk/aws-apprunner-alpha';
 import * as path from 'path';

packages/@aws-cdk/aws-apprunner-alpha/test/integ.service-health-check-configuration.js.snapshot/integ-apprunner.template.json

@@ -0,0 +1,91 @@
+{
+ "Resources": {
+  "ServiceInstanceRoleDFA90CEC": {
+   "Type": "AWS::IAM::Role",
+   "Properties": {
+    "AssumeRolePolicyDocument": {
+     "Statement": [
+      {
+       "Action": "sts:AssumeRole",
+       "Effect": "Allow",
+       "Principal": {
+        "Service": "tasks.apprunner.amazonaws.com"
+       }
+      }
+     ],
+     "Version": "2012-10-17"
+    }
+   }
+  },
+  "ServiceDBC79909": {
+   "Type": "AWS::AppRunner::Service",
+   "Properties": {
+    "HealthCheckConfiguration": {
+     "HealthyThreshold": 5,
+     "Interval": 10,
+     "Path": "/",
+     "Protocol": "HTTP",
+     "Timeout": 10,
+     "UnhealthyThreshold": 10
+    },
+    "InstanceConfiguration": {
+     "InstanceRoleArn": {
+      "Fn::GetAtt": [
+       "ServiceInstanceRoleDFA90CEC",
+       "Arn"
+      ]
+     }
+    },
+    "NetworkConfiguration": {
+     "EgressConfiguration": {
+      "EgressType": "DEFAULT"
+     }
+    },
+    "SourceConfiguration": {
+     "AuthenticationConfiguration": {},
+     "ImageRepository": {
+      "ImageConfiguration": {
+       "Port": "8000"
+      },
+      "ImageIdentifier": "public.ecr.aws/aws-containers/hello-app-runner:latest",
+      "ImageRepositoryType": "ECR_PUBLIC"
+     }
+    }
+   }
+  }
+ },
+ "Parameters": {
+  "BootstrapVersion": {
+   "Type": "AWS::SSM::Parameter::Value<String>",
+   "Default": "/cdk-bootstrap/hnb659fds/version",
+   "Description": "Version of the CDK Bootstrap resources in this environment, automatically retrieved from SSM Parameter Store. [cdk:skip]"
+  }
+ },
+ "Rules": {
+  "CheckBootstrapVersion": {
+   "Assertions": [
+    {
+     "Assert": {
+      "Fn::Not": [
+       {
+        "Fn::Contains": [
+         [
+          "1",
+          "2",
+          "3",
+          "4",
+          "5"
+         ],
+         {
+          "Ref": "BootstrapVersion"
+         }
+        ]
+       }
+      ]
+     },
+     "AssertDescription": "CDK bootstrap stack version 6 required. Please run 'cdk bootstrap' with a recent version of the CDK CLI."
+    }
+   ]
+  }
+ }
+}