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Repo for the controller-runtime subproject of kubebuilder (sig-apimachinery)

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After a test using this repo which failed with an error like ``` ERROR controller-runtime.test-env unable to start the controlplane {"tries": 4, "error": "timeout waiting for process etcd to start...

cncf-cla: yes
lifecycle/rotten
size/XS
lgtm
ok-to-test

closes https://github.com/kubernetes-sigs/controller-runtime/issues/1964 This PR adds a function to ignore `AlreadyExists` errors.

cncf-cla: yes
size/M
needs-ok-to-test

Would be nice be very nice we are able to provide further information for MaxConcurrentReconciles [here](https://github.com/kubernetes-sigs/controller-runtime/blob/master/pkg/controller/controller.go#L37) for we have a better go doc [here](https://pkg.go.dev/sigs.k8s.io/controller-runtime/pkg/controller#Options). People have been asking when/how using...

lifecycle/frozen
kind/documentation

# Feature request Would be cool if we could create a predicate to watch a specific resource, starting from a `NamespacedName` type.

lifecycle/rotten

`admission.Webhook` now passes a request logger to the handler via the context. It can be retrieved by handlers via `logf.FromContext(ctx)` and is setup with commonly interesting fields about the request....

cncf-cla: yes
size/L
ok-to-test

Should we add a metrics named `controller_runtime_queue_length` to indicates the length of the [queue](https://github.com/kubernetes-sigs/controller-runtime/blob/f0351217e9e026533aece74d054b23cae5441659/pkg/internal/controller/controller.go#L61) in the controller. Some times the `Reconcile` has not been invoked, i want to know if...

While reading the code, I noticed that some Functional Options are returning exported type Opts, and some are returning function literal that matches that type. For example: ``` // WriteTo...

lifecycle/rotten

This PR fixes a panic in the conversion webhook HTTP handler when no conversion request is sent by the client. To avoid dereferencing a nil pointer when trying to access...

cncf-cla: yes
size/S
needs-ok-to-test

refer: https://github.com/kubernetes-sigs/controller-runtime/issues/1788 After Kubernetes 1.19, the webhook could respond with "warning"s, refer: https://kubernetes.io/docs/reference/access-authn-authz/extensible-admission-controllers/#response Warnings for validation webhook would bring much help for users with interacting with API. Currently, users of...