cluster-dns-operator startup has an error message:

[controller-runtime] log.SetLogger(...) was never called, logs will not be displayed:

4.14

Always

1. Start cluster-dns-operator
2. oc edit dnses.operator.openshift.io default
  -> Change operatorLogLevel to "Trace" or "Debug" (it doesn't matter which, we just want to trigger an update)
3. Observe backtrace in logs

[controller-runtime] log.SetLogger(...) was never called, logs will not be displayed:
goroutine 201 [running]:
runtime/debug.Stack()
	/usr/lib/golang/src/runtime/debug/stack.go:24 +0x65
sigs.k8s.io/controller-runtime/pkg/log.eventuallyFulfillRoot()
	/dns-operator/vendor/sigs.k8s.io/controller-runtime/pkg/log/log.go:59 +0xbd
sigs.k8s.io/controller-runtime/pkg/log.(*delegatingLogSink).WithValues(0xc0000bae40, {0xc000768ae0, 0x6, 0x6})
	/dns-operator/vendor/sigs.k8s.io/controller-runtime/pkg/log/deleg.go:168 +0x54
github.com/go-logr/logr.Logger.WithValues(...)
	/dns-operator/vendor/github.com/go-logr/logr/logr.go:323
sigs.k8s.io/controller-runtime/pkg/controller.NewUnmanaged.func1(0xc000991980)
	/dns-operator/vendor/sigs.k8s.io/controller-runtime/pkg/controller/controller.go:121 +0x1f6
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).reconcileHandler(0xc0003265a0, {0x1bddf28, 0xc00049d7c0}, {0x17b6120?, 0xc000991960?})
	/dns-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:305 +0x18b
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem(0xc0003265a0, {0x1bddf28, 0xc00049d7c0})
	/dns-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:265 +0x1d9
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2()
	/dns-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:226 +0x85
created by sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2
	/dns-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:222 +0x587

No error message

This is due to 1.27 rebase: https://github.com/openshift/cluster-dns-operator/pull/368