Label Machine objects with configured OS (#924)

Signed-off-by: Artiom Diomin <[email protected]>

Author: kron4eg

pkg/admission/machines.go

@@ -88,6 +88,11 @@ func (ad *admissionData) mutateMachines(ar admissionv1.AdmissionRequest) (*admis
 		common.SetKubeletFlags(&machine, map[common.KubeletFlags]string{
 			common.ExternalCloudProviderKubeletFlag: fmt.Sprintf("%t", ad.nodeSettings.ExternalCloudProvider),
 		})
+		providerConfig, err := providerconfigtypes.GetConfig(machine.Spec.ProviderSpec)
+		if err != nil {
+			return nil, err
+		}
+		common.SetOSLabel(&machine, string(providerConfig.OperatingSystem))
 	}
 
 	return createAdmissionResponse(machineOriginal, &machine)

pkg/apis/cluster/common/consts.go

@@ -193,3 +193,17 @@ func GetKubeletFlags(metaobj metav1.Object) map[KubeletFlags]string {
 	}
 	return result
 }
+
+const OperatingSystemLabelV1 = "v1.machine-controller.kubermatic.io/operating-system"
+
+func SetOSLabel(metaobj metav1.Object, osName string) {
+	lbs := metaobj.GetLabels()
+
+	if _, found := lbs[OperatingSystemLabelV1]; !found {
+		if lbs == nil {
+			lbs = map[string]string{}
+		}
+		lbs[OperatingSystemLabelV1] = osName
+		metaobj.SetLabels(lbs)
+	}
+}