Add api for ingress resource

cmd/api/app/api.go

@@ -22,6 +22,7 @@ import (
 	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/cronjob"
 	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/daemonset"
 	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/deployment"
+	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/ingress"
 	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/job"
 	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/namespace"
 	_ "github.com/karmada-io/dashboard/cmd/api/app/routes/overview"

cmd/api/app/routes/ingress/handler.go

@@ -0,0 +1,40 @@
+package ingress
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/karmada-io/dashboard/cmd/api/app/router"
+	"github.com/karmada-io/dashboard/cmd/api/app/types/common"
+	"github.com/karmada-io/dashboard/pkg/client"
+	"github.com/karmada-io/dashboard/pkg/resource/ingress"
+)
+
+func handleGetIngress(c *gin.Context) {
+	k8sClient := client.InClusterClientForKarmadaApiServer()
+	dataSelect := common.ParseDataSelectPathParameter(c)
+	nsQuery := common.ParseNamespacePathParameter(c)
+	result, err := ingress.GetIngressList(k8sClient, nsQuery, dataSelect)
+	if err != nil {
+		common.Fail(c, err)
+		return
+	}
+	common.Success(c, result)
+}
+
+func handleGetIngressDetail(c *gin.Context) {
+	k8sClient := client.InClusterClientForKarmadaApiServer()
+	namespace := c.Param("namespace")
+	name := c.Param("service")
+	result, err := ingress.GetIngressDetail(k8sClient, namespace, name)
+	if err != nil {
+		common.Fail(c, err)
+		return
+	}
+	common.Success(c, result)
+}
+
+func init() {
+	r := router.V1()
+	r.GET("/ingress", handleGetIngress)
+	r.GET("/ingress/:namespace", handleGetIngress)
+	r.GET("/ingress/:namespace/:service", handleGetIngressDetail)
+}

pkg/resource/ingress/common.go

@@ -0,0 +1,40 @@
+package ingress
+
+import (
+	"github.com/karmada-io/dashboard/pkg/dataselect"
+	v1 "k8s.io/api/networking/v1"
+)
+
+// The code below allows to perform complex data section on []extensions.Ingress
+
+type IngressCell v1.Ingress
+
+func (self IngressCell) GetProperty(name dataselect.PropertyName) dataselect.ComparableValue {
+	switch name {
+	case dataselect.NameProperty:
+		return dataselect.StdComparableString(self.ObjectMeta.Name)
+	case dataselect.CreationTimestampProperty:
+		return dataselect.StdComparableTime(self.ObjectMeta.CreationTimestamp.Time)
+	case dataselect.NamespaceProperty:
+		return dataselect.StdComparableString(self.ObjectMeta.Namespace)
+	default:
+		// if name is not supported then just return a constant dummy value, sort will have no effect.
+		return nil
+	}
+}
+
+func toCells(std []v1.Ingress) []dataselect.DataCell {
+	cells := make([]dataselect.DataCell, len(std))
+	for i := range std {
+		cells[i] = IngressCell(std[i])
+	}
+	return cells
+}
+
+func fromCells(cells []dataselect.DataCell) []v1.Ingress {
+	std := make([]v1.Ingress, len(cells))
+	for i := range std {
+		std[i] = v1.Ingress(cells[i].(IngressCell))
+	}
+	return std
+}

pkg/resource/ingress/detail.go

@@ -0,0 +1,47 @@
+package ingress
+
+import (
+	"context"
+	"log"
+
+	v1 "k8s.io/api/networking/v1"
+	metaV1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	client "k8s.io/client-go/kubernetes"
+)
+
+// IngressDetail API resource provides mechanisms to inject containers with configuration data while keeping
+// containers agnostic of Kubernetes
+type IngressDetail struct {
+	// Extends list item structure.
+	Ingress `json:",inline"`
+
+	// Spec is the desired state of the Ingress.
+	Spec v1.IngressSpec `json:"spec"`
+
+	// Status is the current state of the Ingress.
+	Status v1.IngressStatus `json:"status"`
+
+	// List of non-critical errors, that occurred during resource retrieval.
+	Errors []error `json:"errors"`
+}
+
+// GetIngressDetail returns detailed information about an ingress
+func GetIngressDetail(client client.Interface, namespace, name string) (*IngressDetail, error) {
+	log.Printf("Getting details of %s ingress in %s namespace", name, namespace)
+
+	rawIngress, err := client.NetworkingV1().Ingresses(namespace).Get(context.TODO(), name, metaV1.GetOptions{})
+
+	if err != nil {
+		return nil, err
+	}
+
+	return getIngressDetail(rawIngress), nil
+}
+
+func getIngressDetail(i *v1.Ingress) *IngressDetail {
+	return &IngressDetail{
+		Ingress: toIngress(i),
+		Spec:    i.Spec,
+		Status:  i.Status,
+	}
+}

pkg/resource/ingress/filter.go

@@ -0,0 +1,50 @@
+package ingress
+
+import (
+	"github.com/karmada-io/dashboard/pkg/common/types"
+	networkingv1 "k8s.io/api/networking/v1"
+)
+
+func FilterIngressByService(ingresses []networkingv1.Ingress, serviceName string) []networkingv1.Ingress {
+	var matchingIngresses []networkingv1.Ingress
+	for _, ingress := range ingresses {
+		if ingressMatchesServiceName(ingress, serviceName) {
+			matchingIngresses = append(matchingIngresses, ingress)
+		}
+	}
+	return matchingIngresses
+}
+
+func ingressMatchesServiceName(ingress networkingv1.Ingress, serviceName string) bool {
+	spec := ingress.Spec
+	if ingressBackendMatchesServiceName(spec.DefaultBackend, serviceName) {
+		return true
+	}
+
+	for _, rule := range spec.Rules {
+		if rule.IngressRuleValue.HTTP == nil {
+			continue
+		}
+		for _, path := range rule.IngressRuleValue.HTTP.Paths {
+			if ingressBackendMatchesServiceName(&path.Backend, serviceName) {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func ingressBackendMatchesServiceName(ingressBackend *networkingv1.IngressBackend, serviceName string) bool {
+	if ingressBackend == nil {
+		return false
+	}
+
+	if ingressBackend.Service != nil && ingressBackend.Service.Name == serviceName {
+		return true
+	}
+
+	if ingressBackend.Resource != nil && ingressBackend.Resource.Kind == types.ResourceKindService && ingressBackend.Resource.Name == serviceName {
+		return true
+	}
+	return false
+}

pkg/resource/ingress/list.go

@@ -0,0 +1,104 @@
+package ingress
+
+import (
+	"context"
+	"github.com/karmada-io/dashboard/pkg/common/errors"
+	"github.com/karmada-io/dashboard/pkg/common/helpers"
+	"github.com/karmada-io/dashboard/pkg/common/types"
+	"github.com/karmada-io/dashboard/pkg/dataselect"
+	"github.com/karmada-io/dashboard/pkg/resource/common"
+	v1 "k8s.io/api/networking/v1"
+	client "k8s.io/client-go/kubernetes"
+)
+
+// Ingress - a single ingress returned to the frontend.
+type Ingress struct {
+	types.ObjectMeta `json:"objectMeta"`
+	types.TypeMeta   `json:"typeMeta"`
+
+	// External endpoints of this ingress.
+	Endpoints []common.Endpoint `json:"endpoints"`
+	Hosts     []string          `json:"hosts"`
+}
+
+// IngressList - response structure for a queried ingress list.
+type IngressList struct {
+	types.ListMeta `json:"listMeta"`
+
+	// Unordered list of Ingresss.
+	Items []Ingress `json:"items"`
+
+	// List of non-critical errors, that occurred during resource retrieval.
+	Errors []error `json:"errors"`
+}
+
+// GetIngressList returns all ingresses in the given namespace.
+func GetIngressList(client client.Interface, namespace *common.NamespaceQuery,
+	dsQuery *dataselect.DataSelectQuery) (*IngressList, error) {
+	ingressList, err := client.NetworkingV1().Ingresses(namespace.ToRequestParam()).List(context.TODO(), helpers.ListEverything)
+
+	nonCriticalErrors, criticalError := errors.ExtractErrors(err)
+	if criticalError != nil {
+		return nil, criticalError
+	}
+
+	return ToIngressList(ingressList.Items, nonCriticalErrors, dsQuery), nil
+}
+
+func getEndpoints(ingress *v1.Ingress) []common.Endpoint {
+	endpoints := make([]common.Endpoint, 0)
+	if len(ingress.Status.LoadBalancer.Ingress) > 0 {
+		for _, status := range ingress.Status.LoadBalancer.Ingress {
+			endpoint := common.Endpoint{}
+			if status.Hostname != "" {
+				endpoint.Host = status.Hostname
+			} else if status.IP != "" {
+				endpoint.Host = status.IP
+			}
+			endpoints = append(endpoints, endpoint)
+		}
+	}
+	return endpoints
+}
+
+func getHosts(ingress *v1.Ingress) []string {
+	hosts := make([]string, 0)
+	set := make(map[string]struct{})
+
+	for _, rule := range ingress.Spec.Rules {
+		if _, exists := set[rule.Host]; !exists && len(rule.Host) > 0 {
+			hosts = append(hosts, rule.Host)
+		}
+
+		set[rule.Host] = struct{}{}
+	}
+
+	return hosts
+}
+
+func toIngress(ingress *v1.Ingress) Ingress {
+	return Ingress{
+		ObjectMeta: types.NewObjectMeta(ingress.ObjectMeta),
+		TypeMeta:   types.NewTypeMeta(types.ResourceKindIngress),
+		Endpoints:  getEndpoints(ingress),
+		Hosts:      getHosts(ingress),
+	}
+}
+
+func ToIngressList(ingresses []v1.Ingress, nonCriticalErrors []error, dsQuery *dataselect.DataSelectQuery) *IngressList {
+	newIngressList := &IngressList{
+		ListMeta: types.ListMeta{TotalItems: len(ingresses)},
+		Items:    make([]Ingress, 0),
+		Errors:   nonCriticalErrors,
+	}
+
+	ingresCells, filteredTotal := dataselect.GenericDataSelectWithFilter(toCells(ingresses), dsQuery)
+	ingresses = fromCells(ingresCells)
+	newIngressList.ListMeta = types.ListMeta{TotalItems: filteredTotal}
+
+	for _, ingress := range ingresses {
+		newIngressList.Items = append(newIngressList.Items, toIngress(&ingress))
+	}
+
+	return newIngressList
+}