[CAMEL-21336] camel-kamelet - Allow Kamelets configured by EnvVars only

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.8.0
• Fix Version/s: 4.8.1, 4.9.0
• Component/s: camel-kamelet
• Estimated Complexity: Unknown
• Assignee: Christoph Deppisch
• Reporter: Christoph Deppisch
• Created: 10/Oct/24 09:17
• Updated: 11/Oct/24 14:12
• Resolved: 11/Oct/24 14:12

Description

Kamelets may be configured via environment variables following the property component syntax like CAMEL_KAMELET_AWS_S3_SOURCE_BUCKET_NAME_OR_ARN=myArn

Apparently the Kamelet property validation for required parameters raises exceptions when initializing the Kamelet. This is because the config properties configured via environment variables are not considered in the validation process.

The raised exception looks like this:

s3-sink-deployment-7886f69cc-khspt sink Caused by: java.lang.IllegalArgumentException: Route template aws-s3-sink the following mandatory parameters must be provided: bucketNameOrArn, region
s3-sink-deployment-7886f69cc-khspt sink 	at org.apache.camel.impl.DefaultModel.addRouteFromTemplate(DefaultModel.java:477)
s3-sink-deployment-7886f69cc-khspt sink 	at org.apache.camel.impl.DefaultModel.addRouteFromTemplate(DefaultModel.java:416)
s3-sink-deployment-7886f69cc-khspt sink 	at org.apache.camel.impl.DefaultCamelContext.addRouteFromTemplate(DefaultCamelContext.java:362)
s3-sink-deployment-7886f69cc-khspt sink 	at org.apache.camel.component.kamelet.KameletComponent$LifecycleHandler.createRouteForEndpoint(KameletComponent.java:433)
s3-sink-deployment-7886f69cc-khspt sink 	... 28 more
s3-sink-deployment-7886f69cc-khspt sink 

As a workaround users need to set an empty Kamelet property value e.g.g via application.properties to pass the Kamelet validation and then overwrite the value with the environment variable.

Issue Links

• links to: GitHub Pull Request #15922