[BUG] Parsing YAML for k8s DefaultAnnotations misunderstands "." in annotation keys to mean a nested dict.

[pimdh]

Describe the bug

In the FlytePropellor config (docs), there appears to be a bug in how the YAML file is parsed. Dots in keys are misunderstood as nested dicts. This is relevant, because e.g. Google Kubernetes Engine we might want to set an annotation:
cluster-autoscaler.kubernetes.io/safe-to-evict: "false", which includes dots.

Consider the following config

  k8s:
    plugins:
      k8s:
        default-annotations: 
          test.annotation: "true"

This raises the following flytepropellor error:

time="2025-01-14T10:33:00Z" level=error msg="\n\n\n1 error(s) decoding:\n\n* 'default-annotations[test]' expected type 'string', got unconvertible type 'map[string]interface {}', value: 'map[annotation:true]'"

This suggests that the YAML is parsed into {"default-annotations": {"test": {"annotation": "true}}} instead of {"default-annotations": {"test.annotation": "true}}, as we'd want.

Expected behavior

I'd expect the above config to lead to a default annotation test.annotation: "true", but I get a FlytePropellor error.

Additional context to reproduce

Using flyte-core 1.13.3

Screenshots

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Are you sure this issue hasn't been raised already?

• Yes

Have you read the Code of Conduct?

• Yes