Supported Flink versions?

[debakkerb]

I've been trying to use the operator for a while now, but something that I don't fully understand is what versions of Flink are supported? When you deploy a cluster, in the spec you specify a Flink Version and the image. It's been a while since I looked at the code I wrote, but for now I've configured it like this:

spec:
  flinkVersion: "1.10"
  image:
    name: flink:1.10
    pullPolicy: Always 

However, when I deploy the config now, I get the following error:

RuntimeError: Unable to fetch remote job server jar at https://repo.maven.apache.org/maven2/org/apache/beam/beam-runners-flink-1.10-job-server/2.38.0/beam-runners-flink-1.10-job-server-2.38.0.jar: HTTP Error 404: Not Found

That makes sense, the JAR file doesn't exist. I think I solved this back in the days, but I can't remember how to be honest. When I look at the examples, they still point to Flink 1.8 and 1.9, which seems like quite old versions of Flink.

So, is there a way to know what versions are supported? I also don't know where the URL is configured of that job server jar, unless that's done in the image itself.