karmada/pkg/resourceinterpreter/default/native/dependencies.go

package native

import (
	"fmt"

	appsv1 "k8s.io/api/apps/v1"
	batchv1 "k8s.io/api/batch/v1"
	corev1 "k8s.io/api/core/v1"
	discoveryv1 "k8s.io/api/discovery/v1"
	networkingv1 "k8s.io/api/networking/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
	"k8s.io/apimachinery/pkg/runtime/schema"
	mcsv1alpha1 "sigs.k8s.io/mcs-api/pkg/apis/v1alpha1"

	configv1alpha1 "github.com/karmada-io/karmada/pkg/apis/config/v1alpha1"
	"github.com/karmada-io/karmada/pkg/util"
	"github.com/karmada-io/karmada/pkg/util/helper"
	"github.com/karmada-io/karmada/pkg/util/lifted"
	"github.com/karmada-io/karmada/pkg/util/names"
)

type dependenciesInterpreter func(object *unstructured.Unstructured) ([]configv1alpha1.DependentObjectReference, error)

func getAllDefaultDependenciesInterpreter() map[schema.GroupVersionKind]dependenciesInterpreter {
	s := make(map[schema.GroupVersionKind]dependenciesInterpreter)
	s[appsv1.SchemeGroupVersion.WithKind(util.DeploymentKind)] = getDeploymentDependencies
	s[batchv1.SchemeGroupVersion.WithKind(util.JobKind)] = getJobDependencies
	s[batchv1.SchemeGroupVersion.WithKind(util.CronJobKind)] = getCronJobDependencies
	s[corev1.SchemeGroupVersion.WithKind(util.PodKind)] = getPodDependencies
	s[appsv1.SchemeGroupVersion.WithKind(util.DaemonSetKind)] = getDaemonSetDependencies
	s[appsv1.SchemeGroupVersion.WithKind(util.StatefulSetKind)] = getStatefulSetDependencies
	s[networkingv1.SchemeGroupVersion.WithKind(util.IngressKind)] = getIngressDependencies
	s[mcsv1alpha1.SchemeGroupVersion.WithKind(util.ServiceImportKind)] = getServiceImportDependencies
	return s
}

func getDeploymentDependencies(object *unstructured.Unstructured) ([]configv1alpha1.DependentObjectReference, error) {
	deploymentObj := &appsv1.Deployment{}
	if err := helper.ConvertToTypedObject(object, deploymentObj); err != nil {
		return nil, fmt.Errorf("failed to convert Deployment from unstructured object: %v", err)
	}

	podObj, err := lifted.GetPodFromTemplate(&deploymentObj.Spec.Template, deploymentObj, nil)
	if err != nil {
		return nil, err
	}

	return helper.GetDependenciesFromPodTemplate(podObj)
}

func getJobDependencies(object *unstructured.Unstructured) ([]configv1alpha1.DependentObjectReference, error) {
	jobObj := &batchv1.Job{}
	err := helper.ConvertToTypedObject(object, jobObj)
	if err != nil {
		return nil, fmt.Errorf("failed to convert Job from unstructured object: %v", err)
	}

	podObj, err := lifted.GetPodFromTemplate(&jobObj.Spec.Template, jobObj, nil)
	if err != nil {
		return nil, err
	}

	return helper.GetDependenciesFromPodTemplate(podObj)
}

func getCronJobDependencies(object *unstructured.Unstructured) ([]configv1alpha1.DependentObjectReference, error) {
	cronjobObj := &batchv1.CronJob{}
	err := helper.ConvertToTypedObject(object, cronjobObj)
	if err != nil {
		return nil, fmt.Errorf("failed to convert CronJob from unstructured object: %v", err)
	}

	podObj, err := lifted.GetPodFromTemplate(&cronjobObj.Spec.JobTemplate.Spec.Template, cronjobObj, nil)
	if err != nil {
		return nil, err
	}

	return helper.GetDependenciesFromPodTemplate(podObj)
}

func getPodDependencies(object *unstructured.Unstructured) ([]configv1alpha1.DependentObjectReference, error) {
	podObj := &corev1.Pod{}
	err := helper.ConvertToTypedObject(object, podObj)
	if err != nil {
		return nil, fmt.Errorf("failed to convert Pod from unstructured object: %v", err)
	}

	return helper.GetDependenciesFromPodTemplate(podObj)
}

func getDaemonSetDependencies(object *unstructured.Unstructured) ([]configv1alpha1.DependentObjectReference, error) {
	daemonSetObj := &appsv1.DaemonSet{}
	err := helper.ConvertToTypedObject(object, daemonSetObj)
	if err != nil {
		return nil, fmt.Errorf("failed to convert DaemonSet from unstructured object: %v", err)
	}

	podObj, err := lifted.GetPodFromTemplate(&daemonSetObj.Spec.Template, daemonSetObj, nil)
	if err != nil {
		return nil, err
	}

	return helper.GetDependenciesFromPodTemplate(podObj)
}

func getStatefulSetDependencies(object *unstructured.Unstructured) ([]configv1alpha1.DependentObjectReference, error) {
	statefulSetObj := &appsv1.StatefulSet{}
	err := helper.ConvertToTypedObject(object, statefulSetObj)
	if err != nil {
		return nil, fmt.Errorf("failed to convert StatefulSet from unstructured object: %v", err)
	}

	podObj, err := lifted.GetPodFromTemplate(&statefulSetObj.Spec.Template, statefulSetObj, nil)
	if err != nil {
		return nil, err
	}

	return helper.GetDependenciesFromPodTemplate(podObj)
}

func getIngressDependencies(object *unstructured.Unstructured) ([]configv1alpha1.DependentObjectReference, error) {
	ingressObj := &networkingv1.Ingress{}
	err := helper.ConvertToTypedObject(object, ingressObj)
	if err != nil {
		return nil, fmt.Errorf("failed to convert Ingress from unstructured object: %v", err)
	}
	var dependentObjectRefs []configv1alpha1.DependentObjectReference
	for _, tls := range ingressObj.Spec.TLS {
		dependentObjectRefs = append(dependentObjectRefs, configv1alpha1.DependentObjectReference{
			APIVersion: "v1",
			Kind:       "Secret",
			Namespace:  ingressObj.Namespace,
			Name:       tls.SecretName,
		})
	}
	return dependentObjectRefs, nil
}

func getServiceImportDependencies(object *unstructured.Unstructured) ([]configv1alpha1.DependentObjectReference, error) {
	svcImportObj := &mcsv1alpha1.ServiceImport{}
	err := helper.ConvertToTypedObject(object, svcImportObj)
	if err != nil {
		return nil, fmt.Errorf("failed to convert ServiceImport from unstructured object: %v", err)
	}
	derivedServiceName := names.GenerateDerivedServiceName(svcImportObj.Name)
	return []configv1alpha1.DependentObjectReference{
		{
			APIVersion: "v1",
			Kind:       util.ServiceKind,
			Namespace:  svcImportObj.Namespace,
			Name:       derivedServiceName,
		},
		{
			APIVersion: "discovery.k8s.io/v1",
			Kind:       util.EndpointSliceKind,
			Namespace:  svcImportObj.Namespace,
			LabelSelector: &metav1.LabelSelector{
				MatchLabels: map[string]string{
					discoveryv1.LabelServiceName: derivedServiceName,
				},
			},
		},
	}, nil
}