OCPBUGS-61187: [4.20] carry patch to disable DisableCPUQuotaWithExclusiveCPUs

pkg/features/patch_kube_features.go

@@ -0,0 +1,28 @@
+package features
+
+import (
+	"os"
+
+	"k8s.io/apimachinery/pkg/util/runtime"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	"k8s.io/klog/v2"
+)
+
+// This override should only be used with a support exception. It provides a way
+// to turn off DisableCPUQuotaWithExclusiveCPUs feature gate in a way that still
+// allows the cluster to be upgradable. This is only needed on 4.20, as it's meant as a stop-gap
+// for customers to go through a lengthy process to update their workloads to handle this change.
+// Owners: @haircommander
+func OpenShiftEnableCPUQuotaWithExclusiveCPUsOverride() {
+	overrideVariable := "OCP_4_20_SUPPORT_EXCEPTION_ENABLE_CPU_QUOTA_WITH_EXCLUSIVE_CPUS"
+	_, enabled := os.LookupEnv(overrideVariable)
+	if enabled {
+		klog.Infof("Environment variable %s is set, setting feature gate %s to false", overrideVariable, string(DisableCPUQuotaWithExclusiveCPUs))
+		fg := map[string]bool{string(DisableCPUQuotaWithExclusiveCPUs): false}
+		runtime.Must(utilfeature.DefaultMutableFeatureGate.SetFromMap(fg))
+	}
+}
+
+func init() {
+	OpenShiftEnableCPUQuotaWithExclusiveCPUsOverride()
+}