feat: kubesphere 4.0 (#6115)

* feat: kubesphere 4.0

Signed-off-by: ci-bot <ci-bot@kubesphere.io>

* feat: kubesphere 4.0

Signed-off-by: ci-bot <ci-bot@kubesphere.io>

---------

Signed-off-by: ci-bot <ci-bot@kubesphere.io>
Co-authored-by: ks-ci-bot <ks-ci-bot@example.com>
Co-authored-by: joyceliu <joyceliu@yunify.com>

pkg/controller/k8sapplication/condition.go

@@ -0,0 +1,72 @@
+// Copyright 2020 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package k8sapplication
+
+import (
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	appv1beta1 "sigs.k8s.io/application/api/v1beta1"
+)
+
+func setReadyCondition(appStatus *appv1beta1.ApplicationStatus, reason, message string) {
+	setCondition(appStatus, appv1beta1.Ready, corev1.ConditionTrue, reason, message)
+}
+
+// NotReady - shortcut to set ready condition to false
+func setNotReadyCondition(appStatus *appv1beta1.ApplicationStatus, reason, message string) {
+	setCondition(appStatus, appv1beta1.Ready, corev1.ConditionFalse, reason, message)
+}
+
+// Unknown - shortcut to set ready condition to unknown
+func setReadyUnknownCondition(appStatus *appv1beta1.ApplicationStatus, reason, message string) {
+	setCondition(appStatus, appv1beta1.Ready, corev1.ConditionUnknown, reason, message)
+}
+
+// setErrorCondition - shortcut to set error condition
+func setErrorCondition(appStatus *appv1beta1.ApplicationStatus, reason, message string) {
+	setCondition(appStatus, appv1beta1.Error, corev1.ConditionTrue, reason, message)
+}
+
+// clearErrorCondition - shortcut to set error condition
+func clearErrorCondition(appStatus *appv1beta1.ApplicationStatus) {
+	setCondition(appStatus, appv1beta1.Error, corev1.ConditionFalse, "NoError", "No error seen")
+}
+
+func setCondition(appStatus *appv1beta1.ApplicationStatus, ctype appv1beta1.ConditionType, status corev1.ConditionStatus, reason, message string) {
+	var c *appv1beta1.Condition
+	for i := range appStatus.Conditions {
+		if appStatus.Conditions[i].Type == ctype {
+			c = &appStatus.Conditions[i]
+		}
+	}
+	if c == nil {
+		addCondition(appStatus, ctype, status, reason, message)
+	} else {
+		// check message ?
+		if c.Status == status && c.Reason == reason && c.Message == message {
+			return
+		}
+		now := metav1.Now()
+		c.LastUpdateTime = now
+		if c.Status != status {
+			c.LastTransitionTime = now
+		}
+		c.Status = status
+		c.Reason = reason
+		c.Message = message
+	}
+}
+
+func addCondition(appStatus *appv1beta1.ApplicationStatus, ctype appv1beta1.ConditionType, status corev1.ConditionStatus, reason, message string) {
+	now := metav1.Now()
+	c := appv1beta1.Condition{
+		Type:               ctype,
+		LastUpdateTime:     now,
+		LastTransitionTime: now,
+		Status:             status,
+		Reason:             reason,
+		Message:            message,
+	}
+	appStatus.Conditions = append(appStatus.Conditions, c)
+}

pkg/controller/k8sapplication/k8sapplication_controller.go

@@ -0,0 +1,310 @@
+/*
+ * Please refer to the LICENSE file in the root directory of the project.
+ * https://github.com/kubesphere/kubesphere/blob/master/LICENSE
+ */
+
+package k8sapplication
+
+import (
+	"context"
+	"fmt"
+
+	v1 "k8s.io/api/apps/v1"
+	corev1 "k8s.io/api/core/v1"
+	networkv1 "k8s.io/api/networking/v1"
+	"k8s.io/apimachinery/pkg/api/equality"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/api/meta"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apimachinery/pkg/types"
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
+	"k8s.io/client-go/util/retry"
+	"k8s.io/klog/v2"
+
+	appv1beta1 "sigs.k8s.io/application/api/v1beta1"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/event"
+	"sigs.k8s.io/controller-runtime/pkg/handler"
+	"sigs.k8s.io/controller-runtime/pkg/predicate"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+	"sigs.k8s.io/controller-runtime/pkg/source"
+
+	kscontroller "kubesphere.io/kubesphere/pkg/controller"
+)
+
+const controllerName = "k8sapplication"
+
+var _ kscontroller.Controller = &Reconciler{}
+var _ reconcile.Reconciler = &Reconciler{}
+
+// Reconciler reconciles a Application object
+type Reconciler struct {
+	client.Client
+	Mapper              meta.RESTMapper
+	Scheme              *runtime.Scheme
+	ApplicationSelector labels.Selector
+}
+
+func (r *Reconciler) Name() string {
+	return controllerName
+}
+
+func (r *Reconciler) SetupWithManager(mgr *kscontroller.Manager) error {
+	r.Client = mgr.GetClient()
+	r.Mapper = mgr.GetRESTMapper()
+	r.Scheme = mgr.GetScheme()
+
+	selector, err := labels.Parse(mgr.Options.ComposedAppOptions.AppSelector)
+	if err != nil {
+		return err
+	}
+	r.ApplicationSelector = selector
+
+	c, err := ctrl.NewControllerManagedBy(mgr).
+		For(&appv1beta1.Application{}).
+		Build(r)
+
+	if err != nil {
+		return err
+	}
+
+	sources := []client.Object{
+		&v1.Deployment{},
+		&corev1.Service{},
+		&v1.StatefulSet{},
+		&networkv1.Ingress{},
+	}
+
+	for _, s := range sources {
+		// Watch for changes to Application
+		err = c.Watch(
+			source.Kind(mgr.GetCache(), s),
+			handler.EnqueueRequestsFromMapFunc(
+				func(ctx context.Context, obj client.Object) []reconcile.Request {
+					return []reconcile.Request{{NamespacedName: types.NamespacedName{
+						Name:      GetApplictionName(obj.GetLabels()),
+						Namespace: obj.GetNamespace()}}}
+				}),
+			predicate.Funcs{
+				UpdateFunc: func(e event.UpdateEvent) bool {
+					return isApp(e.ObjectOld, e.ObjectOld)
+				},
+				CreateFunc: func(e event.CreateEvent) bool {
+					return isApp(e.Object)
+				},
+				DeleteFunc: func(e event.DeleteEvent) bool {
+					return isApp(e.Object)
+				},
+			})
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (r *Reconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
+	var app appv1beta1.Application
+	err := r.Get(ctx, req.NamespacedName, &app)
+	if err != nil {
+		if apierrors.IsNotFound(err) {
+			return ctrl.Result{}, nil
+		}
+		return ctrl.Result{}, err
+	}
+
+	// If label selector were given, only reconcile matched applications
+	// match annotations and labels
+	if !r.ApplicationSelector.Empty() {
+		if !r.ApplicationSelector.Matches(labels.Set(app.Labels)) &&
+			!r.ApplicationSelector.Matches(labels.Set(app.Annotations)) {
+			return ctrl.Result{}, err
+		}
+	}
+
+	// Application is in the process of being deleted, so no need to do anything.
+	if app.DeletionTimestamp != nil {
+		return ctrl.Result{}, nil
+	}
+
+	resources, errs := r.updateComponents(ctx, &app)
+	newApplicationStatus := r.getNewApplicationStatus(ctx, &app, resources, &errs)
+
+	newApplicationStatus.ObservedGeneration = app.Generation
+	if equality.Semantic.DeepEqual(newApplicationStatus, &app.Status) {
+		return ctrl.Result{}, nil
+	}
+
+	err = r.updateApplicationStatus(ctx, req.NamespacedName, newApplicationStatus)
+	return ctrl.Result{}, err
+}
+
+func (r *Reconciler) updateComponents(ctx context.Context, app *appv1beta1.Application) ([]*unstructured.Unstructured, []error) {
+	var errs []error
+	resources := r.fetchComponentListResources(ctx, app.Spec.ComponentGroupKinds, app.Spec.Selector, app.Namespace, &errs)
+
+	if app.Spec.AddOwnerRef {
+		ownerRef := metav1.NewControllerRef(app, appv1beta1.GroupVersion.WithKind("Application"))
+		*ownerRef.Controller = false
+		if err := r.setOwnerRefForResources(ctx, *ownerRef, resources); err != nil {
+			errs = append(errs, err)
+		}
+	}
+	return resources, errs
+}
+
+func (r *Reconciler) getNewApplicationStatus(ctx context.Context, app *appv1beta1.Application, resources []*unstructured.Unstructured, errList *[]error) *appv1beta1.ApplicationStatus {
+	objectStatuses := r.objectStatuses(ctx, resources, errList)
+	errs := utilerrors.NewAggregate(*errList)
+
+	aggReady, countReady := aggregateReady(objectStatuses)
+
+	newApplicationStatus := app.Status.DeepCopy()
+	newApplicationStatus.ComponentList = appv1beta1.ComponentList{
+		Objects: objectStatuses,
+	}
+	newApplicationStatus.ComponentsReady = fmt.Sprintf("%d/%d", countReady, len(objectStatuses))
+	if errs != nil {
+		setReadyUnknownCondition(newApplicationStatus, "ComponentsReadyUnknown", "failed to aggregate all components' statuses, check the Error condition for details")
+	} else if aggReady {
+		setReadyCondition(newApplicationStatus, "ComponentsReady", "all components ready")
+	} else {
+		setNotReadyCondition(newApplicationStatus, "ComponentsNotReady", fmt.Sprintf("%d components not ready", len(objectStatuses)-countReady))
+	}
+
+	if errs != nil {
+		setErrorCondition(newApplicationStatus, "ErrorSeen", errs.Error())
+	} else {
+		clearErrorCondition(newApplicationStatus)
+	}
+
+	return newApplicationStatus
+}
+
+func (r *Reconciler) fetchComponentListResources(ctx context.Context, groupKinds []metav1.GroupKind, selector *metav1.LabelSelector, namespace string, errs *[]error) []*unstructured.Unstructured {
+	var resources []*unstructured.Unstructured
+
+	if selector == nil {
+		klog.V(2).Info("No selector is specified")
+		return resources
+	}
+
+	for _, gk := range groupKinds {
+		mapping, err := r.Mapper.RESTMapping(schema.GroupKind{
+			Group: appv1beta1.StripVersion(gk.Group),
+			Kind:  gk.Kind,
+		})
+		if err != nil {
+			klog.V(2).Info("NoMappingForGK", "gk", gk.String())
+			continue
+		}
+
+		list := &unstructured.UnstructuredList{}
+		list.SetGroupVersionKind(mapping.GroupVersionKind)
+		if err = r.Client.List(ctx, list, client.InNamespace(namespace), client.MatchingLabels(selector.MatchLabels)); err != nil {
+			klog.Error(err, "unable to list resources for GVK", "gvk", mapping.GroupVersionKind)
+			*errs = append(*errs, err)
+			continue
+		}
+
+		for _, u := range list.Items {
+			resource := u
+			resources = append(resources, &resource)
+		}
+	}
+	return resources
+}
+
+func (r *Reconciler) setOwnerRefForResources(ctx context.Context, ownerRef metav1.OwnerReference, resources []*unstructured.Unstructured) error {
+	for _, resource := range resources {
+		ownerRefs := resource.GetOwnerReferences()
+		ownerRefFound := false
+		for i, refs := range ownerRefs {
+			if ownerRef.Kind == refs.Kind &&
+				ownerRef.APIVersion == refs.APIVersion &&
+				ownerRef.Name == refs.Name {
+				ownerRefFound = true
+				if ownerRef.UID != refs.UID {
+					ownerRefs[i] = ownerRef
+				}
+			}
+		}
+
+		if !ownerRefFound {
+			ownerRefs = append(ownerRefs, ownerRef)
+		}
+		resource.SetOwnerReferences(ownerRefs)
+		err := r.Client.Update(ctx, resource)
+		if err != nil {
+			// We log this error, but we continue and try to set the ownerRefs on the other resources.
+			klog.Error(err, "ErrorSettingOwnerRef", "gvk", resource.GroupVersionKind().String(),
+				"namespace", resource.GetNamespace(), "name", resource.GetName())
+		}
+	}
+	return nil
+}
+
+func (r *Reconciler) objectStatuses(ctx context.Context, resources []*unstructured.Unstructured, errs *[]error) []appv1beta1.ObjectStatus {
+	var objectStatuses []appv1beta1.ObjectStatus
+	for _, resource := range resources {
+		os := appv1beta1.ObjectStatus{
+			Group: resource.GroupVersionKind().Group,
+			Kind:  resource.GetKind(),
+			Name:  resource.GetName(),
+			Link:  resource.GetSelfLink(),
+		}
+		s, err := status(resource)
+		if err != nil {
+			klog.Error(err, "unable to compute status for resource", "gvk", resource.GroupVersionKind().String(),
+				"namespace", resource.GetNamespace(), "name", resource.GetName())
+			*errs = append(*errs, err)
+		}
+		os.Status = s
+		objectStatuses = append(objectStatuses, os)
+	}
+	return objectStatuses
+}
+
+func aggregateReady(objectStatuses []appv1beta1.ObjectStatus) (bool, int) {
+	countReady := 0
+	for _, os := range objectStatuses {
+		if os.Status == StatusReady {
+			countReady++
+		}
+	}
+	if countReady == len(objectStatuses) {
+		return true, countReady
+	}
+	return false, countReady
+}
+
+func (r *Reconciler) updateApplicationStatus(ctx context.Context, nn types.NamespacedName, status *appv1beta1.ApplicationStatus) error {
+	if err := retry.RetryOnConflict(retry.DefaultRetry, func() error {
+		original := &appv1beta1.Application{}
+		if err := r.Get(ctx, nn, original); err != nil {
+			return err
+		}
+		original.Status = *status
+		if err := r.Client.Status().Update(ctx, original); err != nil {
+			return err
+		}
+		return nil
+	}); err != nil {
+		return fmt.Errorf("failed to update status of Application %s/%s: %v", nn.Namespace, nn.Name, err)
+	}
+	return nil
+}
+
+func isApp(obs ...metav1.Object) bool {
+	for _, o := range obs {
+		if o.GetLabels() != nil && IsAppComponent(o.GetLabels()) {
+			return true
+		}
+	}
+	return false
+}

pkg/controller/k8sapplication/status.go

@@ -0,0 +1,301 @@
+// Copyright 2020 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package k8sapplication
+
+import (
+	"strings"
+
+	appsv1 "k8s.io/api/apps/v1"
+	batchv1 "k8s.io/api/batch/v1"
+	corev1 "k8s.io/api/core/v1"
+	policyv1beta1 "k8s.io/api/policy/v1beta1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+// Constants defining labels
+const (
+	StatusReady      = "Ready"
+	StatusInProgress = "InProgress"
+	StatusUnknown    = "Unknown"
+	StatusDisabled   = "Disabled"
+)
+
+func status(u *unstructured.Unstructured) (string, error) {
+	gk := u.GroupVersionKind().GroupKind()
+	switch gk.String() {
+	case "StatefulSet.apps":
+		return stsStatus(u)
+	case "Deployment.apps":
+		return deploymentStatus(u)
+	case "ReplicaSet.apps":
+		return replicasetStatus(u)
+	case "DaemonSet.apps":
+		return daemonsetStatus(u)
+	case "PersistentVolumeClaim":
+		return pvcStatus(u)
+	case "Service":
+		return serviceStatus(u)
+	case "Pod":
+		return podStatus(u)
+	case "PodDisruptionBudget.policy":
+		return pdbStatus(u)
+	case "ReplicationController":
+		return replicationControllerStatus(u)
+	case "Job.batch":
+		return jobStatus(u)
+	default:
+		return statusFromStandardConditions(u)
+	}
+}
+
+// Status from standard conditions
+func statusFromStandardConditions(u *unstructured.Unstructured) (string, error) {
+	condition := StatusReady
+
+	// Check Ready condition
+	_, cs, found, err := getConditionOfType(u, StatusReady)
+	if err != nil {
+		return StatusUnknown, err
+	}
+	if found && cs == corev1.ConditionFalse {
+		condition = StatusInProgress
+	}
+
+	// Check InProgress condition
+	_, cs, found, err = getConditionOfType(u, StatusInProgress)
+	if err != nil {
+		return StatusUnknown, err
+	}
+	if found && cs == corev1.ConditionTrue {
+		condition = StatusInProgress
+	}
+
+	return condition, nil
+}
+
+// Statefulset
+func stsStatus(u *unstructured.Unstructured) (string, error) {
+	sts := &appsv1.StatefulSet{}
+	if err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.Object, sts); err != nil {
+		return StatusUnknown, err
+	}
+
+	if sts.Status.ObservedGeneration == sts.Generation &&
+		sts.Status.Replicas == *sts.Spec.Replicas &&
+		sts.Status.ReadyReplicas == *sts.Spec.Replicas &&
+		sts.Status.CurrentReplicas == *sts.Spec.Replicas {
+		return StatusReady, nil
+	}
+	return StatusInProgress, nil
+}
+
+// Deployment
+func deploymentStatus(u *unstructured.Unstructured) (string, error) {
+	deployment := &appsv1.Deployment{}
+	if err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.Object, deployment); err != nil {
+		return StatusUnknown, err
+	}
+
+	replicaFailure := false
+	progressing := false
+	available := false
+
+	for _, condition := range deployment.Status.Conditions {
+		switch condition.Type {
+		case appsv1.DeploymentProgressing:
+			if condition.Status == corev1.ConditionTrue && condition.Reason == "NewReplicaSetAvailable" {
+				progressing = true
+			}
+		case appsv1.DeploymentAvailable:
+			if condition.Status == corev1.ConditionTrue {
+				available = true
+			}
+		case appsv1.DeploymentReplicaFailure:
+			if condition.Status == corev1.ConditionTrue {
+				replicaFailure = true
+				break
+			}
+		}
+	}
+
+	if deployment.Status.ObservedGeneration == deployment.Generation &&
+		deployment.Status.Replicas == *deployment.Spec.Replicas &&
+		deployment.Status.ReadyReplicas == *deployment.Spec.Replicas &&
+		deployment.Status.AvailableReplicas == *deployment.Spec.Replicas &&
+		deployment.Status.Conditions != nil && len(deployment.Status.Conditions) > 0 &&
+		(progressing || available) && !replicaFailure {
+		return StatusReady, nil
+	}
+	return StatusInProgress, nil
+}
+
+// Replicaset
+func replicasetStatus(u *unstructured.Unstructured) (string, error) {
+	rs := &appsv1.ReplicaSet{}
+	if err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.Object, rs); err != nil {
+		return StatusUnknown, err
+	}
+
+	replicaFailure := false
+	for _, condition := range rs.Status.Conditions {
+		switch condition.Type {
+		case appsv1.ReplicaSetReplicaFailure:
+			if condition.Status == corev1.ConditionTrue {
+				replicaFailure = true
+				break
+			}
+		}
+	}
+	if rs.Status.ObservedGeneration == rs.Generation &&
+		rs.Status.Replicas == *rs.Spec.Replicas &&
+		rs.Status.ReadyReplicas == *rs.Spec.Replicas &&
+		rs.Status.AvailableReplicas == *rs.Spec.Replicas && !replicaFailure {
+		return StatusReady, nil
+	}
+	return StatusInProgress, nil
+}
+
+// Daemonset
+func daemonsetStatus(u *unstructured.Unstructured) (string, error) {
+	ds := &appsv1.DaemonSet{}
+	if err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.Object, ds); err != nil {
+		return StatusUnknown, err
+	}
+
+	if ds.Status.ObservedGeneration == ds.Generation &&
+		ds.Status.DesiredNumberScheduled == ds.Status.NumberAvailable &&
+		ds.Status.DesiredNumberScheduled == ds.Status.NumberReady {
+		return StatusReady, nil
+	}
+	return StatusInProgress, nil
+}
+
+// PVC
+func pvcStatus(u *unstructured.Unstructured) (string, error) {
+	pvc := &corev1.PersistentVolumeClaim{}
+	if err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.Object, pvc); err != nil {
+		return StatusUnknown, err
+	}
+
+	if pvc.Status.Phase == corev1.ClaimBound {
+		return StatusReady, nil
+	}
+	return StatusInProgress, nil
+}
+
+// Service
+func serviceStatus(u *unstructured.Unstructured) (string, error) {
+	service := &corev1.Service{}
+	if err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.Object, service); err != nil {
+		return StatusUnknown, err
+	}
+	stype := service.Spec.Type
+
+	if stype == corev1.ServiceTypeClusterIP || stype == corev1.ServiceTypeNodePort || stype == corev1.ServiceTypeExternalName ||
+		stype == corev1.ServiceTypeLoadBalancer && isEmpty(service.Spec.ClusterIP) &&
+			len(service.Status.LoadBalancer.Ingress) > 0 && !hasEmptyIngressIP(service.Status.LoadBalancer.Ingress) {
+		return StatusReady, nil
+	}
+	return StatusInProgress, nil
+}
+
+// Pod
+func podStatus(u *unstructured.Unstructured) (string, error) {
+	pod := &corev1.Pod{}
+	if err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.Object, pod); err != nil {
+		return StatusUnknown, err
+	}
+
+	for _, condition := range pod.Status.Conditions {
+		if condition.Type == corev1.PodReady && (condition.Reason == "PodCompleted" || condition.Status == corev1.ConditionTrue) {
+			return StatusReady, nil
+		}
+	}
+	return StatusInProgress, nil
+}
+
+// PodDisruptionBudget
+func pdbStatus(u *unstructured.Unstructured) (string, error) {
+	pdb := &policyv1beta1.PodDisruptionBudget{}
+	if err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.Object, pdb); err != nil {
+		return StatusUnknown, err
+	}
+
+	if pdb.Status.ObservedGeneration == pdb.Generation &&
+		pdb.Status.CurrentHealthy >= pdb.Status.DesiredHealthy {
+		return StatusReady, nil
+	}
+	return StatusInProgress, nil
+}
+
+func replicationControllerStatus(u *unstructured.Unstructured) (string, error) {
+	rc := &corev1.ReplicationController{}
+	if err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.Object, rc); err != nil {
+		return StatusUnknown, err
+	}
+
+	if rc.Status.ObservedGeneration == rc.Generation &&
+		rc.Status.Replicas == *rc.Spec.Replicas &&
+		rc.Status.ReadyReplicas == *rc.Spec.Replicas &&
+		rc.Status.AvailableReplicas == *rc.Spec.Replicas {
+		return StatusReady, nil
+	}
+	return StatusInProgress, nil
+}
+
+func jobStatus(u *unstructured.Unstructured) (string, error) {
+	job := &batchv1.Job{}
+
+	if err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.Object, job); err != nil {
+		return StatusUnknown, err
+	}
+
+	if job.Status.StartTime == nil {
+		return StatusInProgress, nil
+	}
+
+	return StatusReady, nil
+}
+
+func hasEmptyIngressIP(ingress []corev1.LoadBalancerIngress) bool {
+	for _, i := range ingress {
+		if isEmpty(i.IP) {
+			return true
+		}
+	}
+	return false
+}
+
+func isEmpty(s string) bool {
+	return len(strings.TrimSpace(s)) == 0
+}
+
+func getConditionOfType(u *unstructured.Unstructured, conditionType string) (string, corev1.ConditionStatus, bool, error) {
+	conditions, found, err := unstructured.NestedSlice(u.Object, "status", "conditions")
+	if err != nil || !found {
+		return "", corev1.ConditionFalse, false, err
+	}
+
+	for _, c := range conditions {
+		condition, ok := c.(map[string]interface{})
+		if !ok {
+			continue
+		}
+		t, found := condition["type"]
+		if !found {
+			continue
+		}
+		condType, ok := t.(string)
+		if !ok {
+			continue
+		}
+		if condType == conditionType {
+			reason := condition["reason"].(string)
+			conditionStatus := condition["status"].(string)
+			return reason, corev1.ConditionStatus(conditionStatus), true, nil
+		}
+	}
+	return "", corev1.ConditionFalse, false, nil
+}

pkg/controller/k8sapplication/utils.go

@@ -0,0 +1,102 @@
+/*
+ * Please refer to the LICENSE file in the root directory of the project.
+ * https://github.com/kubesphere/kubesphere/blob/master/LICENSE
+ */
+
+package k8sapplication
+
+import (
+	"strings"
+
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+const (
+	AppLabel                = "app"
+	VersionLabel            = "version"
+	ApplicationNameLabel    = "app.kubernetes.io/name"
+	ApplicationVersionLabel = "app.kubernetes.io/version"
+)
+
+// resource with these following labels considered as part of servicemesh
+var ApplicationLabels = [...]string{
+	ApplicationNameLabel,
+	ApplicationVersionLabel,
+	AppLabel,
+}
+
+// resource with these following labels considered as part of kubernetes-sigs/application
+var AppLabels = [...]string{
+	ApplicationNameLabel,
+	ApplicationVersionLabel,
+}
+
+var TrimChars = [...]string{".", "_", "-"}
+
+// normalize version names
+// strip [_.-]
+func NormalizeVersionName(version string) string {
+	for _, char := range TrimChars {
+		version = strings.ReplaceAll(version, char, "")
+	}
+	return version
+}
+
+func GetApplictionName(lbs map[string]string) string {
+	if name, ok := lbs[ApplicationNameLabel]; ok {
+		return name
+	}
+	return ""
+
+}
+
+func GetComponentName(meta *v1.ObjectMeta) string {
+	if len(meta.Labels[AppLabel]) > 0 {
+		return meta.Labels[AppLabel]
+	}
+	return ""
+}
+
+func GetComponentVersion(meta *v1.ObjectMeta) string {
+	if len(meta.Labels[VersionLabel]) > 0 {
+		return meta.Labels[VersionLabel]
+	}
+	return ""
+}
+
+func ExtractApplicationLabels(meta *v1.ObjectMeta) map[string]string {
+
+	labels := make(map[string]string, len(ApplicationLabels))
+	for _, label := range ApplicationLabels {
+		if _, ok := meta.Labels[label]; !ok {
+			return nil
+		} else {
+			labels[label] = meta.Labels[label]
+		}
+	}
+
+	return labels
+}
+
+func IsApplicationComponent(lbs map[string]string) bool {
+
+	for _, label := range ApplicationLabels {
+		if _, ok := lbs[label]; !ok {
+			return false
+		}
+	}
+
+	return true
+}
+
+// Whether it belongs to kubernetes-sigs/application or not
+func IsAppComponent(lbs map[string]string) bool {
+
+	for _, label := range AppLabels {
+		if _, ok := lbs[label]; !ok {
+			return false
+		}
+	}
+
+	return true
+}