* Add support for admission webhook warnings.
This extends `apis.FieldError` to support designating certain FieldErrors as "warnings" (or explicitly as "errors", however, this is the default for back-compat).
You can turn an `apis.FieldError` into a warning using: `fe.At(apis.WarningLevel)` or force it into an error using: `fe.At(apis.ErrorLevel)`.
You can get the errors at a particular diagnostic level using: `fe.Filter(apis.WarningLevel)`.
This change also hooks this into the admission webhook infrastructure to support surfacing the "warning" level `apis.FieldError`s via the `Warnings` section of the `AdmissionResponse`.
Fixes: #2497
* Add a comment about the use of defer.
* Add new callback pattern to pkg
* include the context
* typo
* Remove the empty instance of unstructured
* initialize the unstructured var
* Eliminate the unneeded pointer
* Pass a pointer to unstructured callback
* Create a validation specific context struct
* Move callback tests to own unit test case
* Switch from converting to decoding
* Update webhook/resourcesemantics/validation/validation.go
Co-Authored-By: Victor Agababov <vagababov@gmail.com>
* don't wrap context and include params
* split validation files
* include 2020 copyright
* include unit test for WithKubeClient
* Don't bother updating copyright date
* Inclue a unit test for panic
* Move dryRun to context
* Include context dry run unit test
* put the request operation in the context
* eliminate circular dep
* move kubeclient test out of context_test
* dont bother iterating callback map
* Callback takes a list of supported verbs
* Remove extra type
* Ensure Callback interface is public
* Alias Operation into validation
* alias Operation right in Webhook
* Update webhook/resourcesemantics/validation/validation_admit.go
Co-Authored-By: Victor Agababov <vagababov@gmail.com>
* Update webhook/resourcesemantics/validation/validation_admit_test.go
Co-Authored-By: Victor Agababov <vagababov@gmail.com>
* Update webhook/resourcesemantics/validation/validation_admit_test.go
Co-Authored-By: Victor Agababov <vagababov@gmail.com>
* Update webhook/resourcesemantics/validation/validation_admit.go
Co-Authored-By: Victor Agababov <vagababov@gmail.com>
* Update webhook/resourcesemantics/validation/validation_admit.go
Co-Authored-By: Victor Agababov <vagababov@gmail.com>
* Update webhook/resourcesemantics/validation/validation_admit_test.go
Co-Authored-By: Victor Agababov <vagababov@gmail.com>
* correct parens
* minor style fixes
* Rename Callback to Func
* Fix build error
* Switch callback to take a list with a factory
* keep descriptive names
* update comment
* Drop pointer, correct comments
* Add a unit test to disallow duplicate verbs
* fix comments, struct{} for set
* switch to variadic arg for NewCallback
Co-authored-by: Victor Agababov <vagababov@gmail.com>
Matt Moore
Victor Agababov
Dave Protasowski
whaught
cshou
Markus Thömmes
Matt Moore