jsonPath is a simple JSON path which is evaluated against each custom resource to produce a field selector value.
Only JSON paths without the array notation are allowed.
Must point to a field of type string, boolean or integer.
Types with enum values and strings with formats are allowed.
If jsonPath refers to absent field in a resource, the jsonPath evaluates to an empty string.
Must not point to metdata fields.
Required.
SelectableField specifies the JSON path of a field that may be used with field selectors.