feat(cloudfront-origins): extend max keepaliveTimeout of HttpOrigin to 180 (#18837)

This pull request extends the maximum value of the keepaliveTimeout property for HttpOriginProps up to 180 seconds. This allows the use of the construct also in the case that a limit increase has been approved for CloudFront [origin keep-alive timeout quota](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/distribution-web-values-specify.html#DownloadDistValuesOriginKeepaliveTimeout).

The 180 seconds cap should be AWS hard limit for that quota.

This is related to #18697, which only extended the readTimeout, but keepaliveTimeout can also be increased.

----

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

Author: taeemo

packages/@aws-cdk/aws-cloudfront-origins/README.md

@@ -76,11 +76,12 @@ const origin = new origins.LoadBalancerV2Origin(loadBalancer, {
   connectionAttempts: 3,
   connectionTimeout: Duration.seconds(5),
   readTimeout: Duration.seconds(45),
+  keepaliveTimeout: Duration.seconds(45),
   protocolPolicy: cloudfront.OriginProtocolPolicy.MATCH_VIEWER,
 });
 ```
 
-Note that the `readTimeout` property can extend its value over 60 seconds only if a limit increase request for CloudFront origin response timeout
+Note that the `readTimeout` and `keepaliveTimeout` properties can extend their values over 60 seconds only if a limit increase request for CloudFront origin response timeout
 quota has been approved in the target account; otherwise, values over 60 seconds will produce an error at deploy time. Consider that this value is
 still limited to a maximum value of 180 seconds, which is a hard limit for that quota.
 

packages/@aws-cdk/aws-cloudfront-origins/lib/http-origin.ts

@@ -46,7 +46,10 @@ export interface HttpOriginProps extends cloudfront.OriginProps {
 
   /**
    * Specifies how long, in seconds, CloudFront persists its connection to the origin.
-   * The valid range is from 1 to 60 seconds, inclusive.
+   * The valid range is from 1 to 180 seconds, inclusive.
+   *
+   * Note that values over 60 seconds are possible only after a limit increase request for the origin response timeout quota
+   * has been approved in the target account; otherwise, values over 60 seconds will produce an error at deploy time.
    *
    * @default Duration.seconds(5)
    */
@@ -62,7 +65,7 @@ export class HttpOrigin extends cloudfront.OriginBase {
     super(domainName, props);
 
     validateSecondsInRangeOrUndefined('readTimeout', 1, 180, props.readTimeout);
-    validateSecondsInRangeOrUndefined('keepaliveTimeout', 1, 60, props.keepaliveTimeout);
+    validateSecondsInRangeOrUndefined('keepaliveTimeout', 1, 180, props.keepaliveTimeout);
   }
 
   protected renderCustomOriginConfig(): cloudfront.CfnDistribution.CustomOriginConfigProperty | undefined {

packages/@aws-cdk/aws-cloudfront-origins/test/http-origin.test.ts

@@ -84,12 +84,12 @@ test.each([
   Duration.seconds(0),
   Duration.seconds(0.5),
   Duration.seconds(60.5),
-  Duration.seconds(61),
+  Duration.seconds(181),
   Duration.minutes(5),
-])('validates keepaliveTimeout is an integer between 1 and 60 seconds', (keepaliveTimeout) => {
+])('validates keepaliveTimeout is an integer between 1 and 180 seconds', (keepaliveTimeout) => {
   expect(() => {
     new HttpOrigin('www.example.com', {
       keepaliveTimeout,
     });
-  }).toThrow(`keepaliveTimeout: Must be an int between 1 and 60 seconds (inclusive); received ${keepaliveTimeout.toSeconds()}.`);
+  }).toThrow(`keepaliveTimeout: Must be an int between 1 and 180 seconds (inclusive); received ${keepaliveTimeout.toSeconds()}.`);
 });