Add namespace required for GoogleManagedCertificate

[megaserg]

Problem: On master, ./kapitan c fails with:

pydantic_core._pydantic_core.ValidationError: 1 validation error for GoogleManagedCertificate
namespace
  Input should be a valid string [type=string_type, input_value=Dict({}), input_type=Dict]

Full stacktrace:

Traceback (most recent call last):
  File "/opt/venv/lib/python3.11/site-packages/kapitan/inputs/kadet.py", line 129, in compile_file
    output_obj = kadet_module.main(input_params)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/megaserg/work/kapitan-templates/system/generators/kubernetes/__init__.py", line 16, in main
    store = generator.generate()
            ^^^^^^^^^^^^^^^^^^^^
  File "/Users/megaserg/work/kapitan-templates/system/lib/kgenlib/__init__.py", line 718, in generate
    self.expand_and_run(generator_function=func, generator_params=params)
  File "/Users/megaserg/work/kapitan-templates/system/lib/kgenlib/__init__.py", line 688, in expand_and_run
    self._run_generator_function(
  File "/Users/megaserg/work/kapitan-templates/system/lib/kgenlib/__init__.py", line 660, in _run_generator_function
    self.store.add(generator_function.generate(meta=generator_function_params))
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/megaserg/work/kapitan-templates/system/lib/kgenlib/__init__.py", line 326, in generate
    return cls(**meta)
           ^^^^^^^^^^^
  File "/opt/venv/lib/python3.11/site-packages/kadet/__init__.py", line 214, in __init__
    self.body()
  File "/Users/megaserg/work/kapitan-templates/system/generators/kubernetes/networking.py", line 413, in body
    GoogleManagedCertificate(
  File "/opt/venv/lib/python3.11/site-packages/kadet/__init__.py", line 206, in __init__
    super().__init__(**data)
  File "/opt/venv/lib/python3.11/site-packages/pydantic/main.py", line 212, in __init__
    validated_self = self.__pydantic_validator__.validate_python(data, self_instance=self)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.ValidationError: 1 validation error for GoogleManagedCertificate
namespace
  Input should be a valid string [type=string_type, input_value=Dict({}), input_type=Dict]
    For further information visit https://errors.pydantic.dev/2.9/v/string_type

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/venv/lib/python3.11/site-packages/kapitan/inputs/base.py", line 77, in compile_input_path
    self.compile_file(
  File "/opt/venv/lib/python3.11/site-packages/kapitan/inputs/kadet.py", line 135, in compile_file
    raise CompileError(f"Could not load Kadet module: {spec.name[16:]}")
kapitan.errors.CompileError: Could not load Kadet module: kubernetes

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/venv/lib/python3.11/site-packages/kapitan/targets.py", line 303, in compile_target
    input_compiler.compile_obj(comp_obj, ext_vars, **kwargs)
  File "/opt/venv/lib/python3.11/site-packages/kapitan/inputs/base.py", line 58, in compile_obj
    self.compile_input_path(input_path, comp_obj, ext_vars, **kwargs)
  File "/opt/venv/lib/python3.11/site-packages/kapitan/inputs/base.py", line 88, in compile_input_path
    raise CompileError("{}\nCompile error: failed to compile target: {}".format(e, target_name))
kapitan.errors.CompileError: Could not load Kadet module: kubernetes
Compile error: failed to compile target: prod-sockshop

Cause: Seems like namespace is required and empty, making it become a default value {}.

Solution: Add a namespace to the certificate config.

Result: ./kapitan c works, and the generated manifest compiled/prod-sockshop/manifests/gke-managed-certificate-managed-certificate.yml now contains: namespace: prod-sockshop.

[fg91]

I can confirm that this issue exists in the getting started guide when using the latest releaes (0.34.7) and that it is solved by the fix :)