Changes scheduler.New so that algorithm source is moved from the
parameter to an option. The default algorithm source is source with the
DefaultProvider.
As part of graduating the scheduler's component config to beta, we require configurable fields to be nilable pointers (see https://github.com/kubernetes/kubernetes/issues/78109). This enables the ability to distinguish between default and unset values. We are only applying this change to external types, and reacting in our defaulting logic. This also reverts existing internal component config fields which were pointers to be non-pointers, for consistency.
This implements a lenient path for decoding a kube-scheduler config file.
The config file gets decoded with a strict serializer first, if that fails a lenient
CodecFactory that has just v1alpha1 registered into it is used for decoding. The lenient
path is to be dropped when support for v1alpha1 is dropped.
For more information on the discussion see #82924 and the linked PRs.
Errors from staticcheck:
cmd/kube-scheduler/app/server.go:297:27: prometheus.Handler is deprecated: Please note the issues described in the doc comment of InstrumentHandler. You might want to consider using promhttp.Handler instead. (SA1019)
pkg/apis/scheduling/v1alpha1/defaults.go:27:6: func addDefaultingFuncs is unused (U1000)
pkg/apis/scheduling/v1beta1/defaults.go:27:6: func addDefaultingFuncs is unused (U1000)
test/e2e/scheduling/predicates.go:757:6: func verifyReplicasResult is unused (U1000)
test/e2e/scheduling/predicates.go:765:6: func getPodsByLabels is unused (U1000)
test/e2e/scheduling/predicates.go:772:6: func runAndKeepPodWithLabelAndGetNodeName is unused (U1000)
test/e2e/scheduling/limit_range.go:172:3: this value of pod is never used (SA4006)
test/e2e/scheduling/limit_range.go:177:3: this value of pod is never used (SA4006)
test/e2e/scheduling/limit_range.go:196:3: this value of pod is never used (SA4006)
test/e2e/scheduling/limit_range.go:201:3: this value of pod is never used (SA4006)
test/e2e/scheduling/limit_range.go:240:3: this value of pod is never used (SA4006)
test/e2e/scheduling/taints.go:428:13: this value of err is never used (SA4006)
test/e2e/scheduling/ubernetes_lite.go:219:2: this value of pods is never used (SA4006)
test/integration/scheduler/extender_test.go:78:4: this value of resp is never used (SA4006)
test/integration/volumescheduling/volume_binding_test.go:529:15: this result of append is never used, except maybe in other appends (SA4010)
test/integration/volumescheduling/volume_binding_test.go:538:15: this result of append is never used, except maybe in other appends (SA4010)
