Apache Flink Rest-Client Jar-Upload not working

Question

I am struggling to automatically deploy new Flink jobs within our CI/CD workflows by using the Flink rest-api (which may be found here in the flink Github repository).

Documentation only says that that jar upload may be achieved by using /jars/upload, but not how exactly a valid rest request has to be build (which Headers, which Body type, which Authorization, which Method and so on).

So I took a look at the Flink dashboard code of flink/flink-runtime-web project on Github and searched for the implementation they used to upload a jar and - Yippie! Its implemented by calling the rest-api I am trying to use (using POST as method). After that I tried to figure out with Postman which is correct way to send requests using different Content-Type headers and Body types, but none of them worked for me now.

I would have filed a ticket directly to the flink project, but could not find any reference to their ticket system.

So the basic Question here is:

• How do I have to call the rest endpoint /jars/upload to successfully upload a file?

Answer 1

Those who are more partial to a command line can use curl:

curl -X POST -H "Expect:" -F "jarfile=@path/to/flink-job.jar" http://hostname:8081/jars/upload