feat(elasticloadbalancingv2): add grpc code matcher for alb (aws#13948)

With aws#13570, it is now possible to set the protocol version for ALB target groups, and thus make it working for GRPC.
However, it is not yet possible to define a GrpcCode for the matcher (see [CloudFormation doc](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-elasticloadbalancingv2-targetgroup-matcher.html)).

I added a `healthyGrpcCodes` working the same way as `healthyHttpCodes`.

closes aws#13947

----

*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-elasticloadbalancingv2/README.md

@@ -283,6 +283,10 @@ const tg = new elbv2.ApplicationTargetGroup(stack, 'TG', {
  port: 50051,
  protocol: elbv2.ApplicationProtocol.HTTP,
  protocolVersion: elbv2.ApplicationProtocolVersion.GRPC,
+ healthCheck: {
+ enabled: true,
+ healthyGrpcCodes: '0-99',
+ },
  vpc,
 });
 ```

packages/@aws-cdk/aws-elasticloadbalancingv2/lib/shared/base-target-group.ts

@@ -136,6 +136,16 @@ export interface HealthCheck {
  */
  readonly unhealthyThresholdCount?: number;
 
+ /**
+ * GRPC code to use when checking for a successful response from a target.
+ *
+ * You can specify values between 0 and 99. You can specify multiple values
+ * (for example, "0,1") or a range of values (for example, "0-5").
+ *
+ * @default - 12
+ */
+ readonly healthyGrpcCodes?: string;
+
  /**
  * HTTP code to use when checking for a successful response from a target.
  *
@@ -259,7 +269,8 @@ export abstract class TargetGroupBase extends CoreConstruct implements ITargetGr
  healthyThresholdCount: cdk.Lazy.number({ produce: () => this.healthCheck?.healthyThresholdCount }),
  unhealthyThresholdCount: cdk.Lazy.number({ produce: () => this.healthCheck?.unhealthyThresholdCount }),
  matcher: cdk.Lazy.any({
- produce: () => this.healthCheck?.healthyHttpCodes !== undefined ? {
+ produce: () => this.healthCheck?.healthyHttpCodes !== undefined || this.healthCheck?.healthyGrpcCodes !== undefined ? {
+ grpcCode: this.healthCheck.healthyGrpcCodes,
  httpCode: this.healthCheck.healthyHttpCodes,
  } : undefined,
  }),

packages/@aws-cdk/aws-elasticloadbalancingv2/test/alb/target-group.test.ts

@@ -166,11 +166,29 @@ describe('tests', () => {
  new elbv2.ApplicationTargetGroup(stack, 'TargetGroup', {
  vpc,
  protocolVersion: elbv2.ApplicationProtocolVersion.GRPC,
+ healthCheck: {
+ enabled: true,
+ healthyGrpcCodes: '0-99',
+ interval: cdk.Duration.seconds(255),
+ timeout: cdk.Duration.seconds(192),
+ healthyThresholdCount: 29,
+ unhealthyThresholdCount: 27,
+ path: '/arbitrary',
+ },
  });
 
  // THEN
  expect(stack).toHaveResource('AWS::ElasticLoadBalancingV2::TargetGroup', {
  ProtocolVersion: 'GRPC',
+ HealthCheckEnabled: true,
+ HealthCheckIntervalSeconds: 255,
+ HealthCheckPath: '/arbitrary',
+ HealthCheckTimeoutSeconds: 192,
+ HealthyThresholdCount: 29,
+ Matcher: {
+ GrpcCode: '0-99',
+ },
+ UnhealthyThresholdCount: 27,
  });
  });