Block upgrade for openshift-sdn

This commit updates network cluster operator status condition with Upgradable
to False when networking plugin is with openshift-sdn. This would help CVO to
block cluster upgrade into 4.17 when it sees Upgradable=False from Cluster
Operator.

Signed-off-by: Periyasamy Palanisamy <pepalani@redhat.com>

pkg/controller/operconfig/operconfig_controller.go

@@ -375,6 +375,11 @@ func (r *ReconcileOperConfig) Reconcile(ctx context.Context, request reconcile.R
 		r.status.UnsetProgressing(statusmanager.OperatorRender)
 	}
 
+	if operConfig.Spec.DefaultNetwork.OpenShiftSDNConfig != nil {
+		r.status.SetNotUpgradable(statusmanager.OperatorConfig, "UpdateOperatorConfig",
+			"OpenShiftSDN Upgrade won't be supported, consider migrating into OVN-Kubernetes")
+	}
+
 	// The first object we create should be the record of our applied configuration. The last object we create is config.openshift.io/v1/Network.Status
 	app, err := AppliedConfiguration(operConfig)
 	if err != nil {

pkg/controller/statusmanager/status_manager.go

@@ -569,6 +569,39 @@ func (status *StatusManager) UnsetProgressing(statusLevel StatusLevel) {
 	status.unsetProgressing(statusLevel)
 }
 
+// syncNotUpgradable syncs the current Upgradable status
+func (status *StatusManager) syncNotUpgradable() {
+	for _, c := range status.failing {
+		if c != nil && c.Type == operv1.OperatorStatusTypeUpgradeable {
+			status.set(false, *c)
+			return
+		}
+	}
+	status.set(
+		false,
+		operv1.OperatorCondition{
+			Type:   operv1.OperatorStatusTypeUpgradeable,
+			Status: operv1.ConditionFalse,
+		},
+	)
+}
+
+func (status *StatusManager) setNotUpgradable(statusLevel StatusLevel, reason, message string) {
+	status.failing[statusLevel] = &operv1.OperatorCondition{
+		Type:    operv1.OperatorStatusTypeUpgradeable,
+		Status:  operv1.ConditionFalse,
+		Reason:  reason,
+		Message: message,
+	}
+	status.syncNotUpgradable()
+}
+
+func (status *StatusManager) SetNotUpgradable(statusLevel StatusLevel, reason, message string) {
+	status.Lock()
+	defer status.Unlock()
+	status.setNotUpgradable(statusLevel, reason, message)
+}
+
 func (status *StatusManager) SetRelatedObjects(relatedObjects []configv1.ObjectReference) {
 	status.Lock()
 	defer status.Unlock()