kubesphere/pkg/models/resources/v1alpha3/node/nodes_test.go

/*
Copyright 2019 The KubeSphere Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package node

import (
	"github.com/google/go-cmp/cmp"
	corev1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/api/resource"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/informers"
	"k8s.io/client-go/kubernetes/fake"
	"kubesphere.io/kubesphere/pkg/api"
	"kubesphere.io/kubesphere/pkg/apiserver/query"
	"kubesphere.io/kubesphere/pkg/models/resources/v1alpha3"
	"strconv"
	"testing"
)

// mergeResourceLists will merge resoure lists. When two lists have the same resourece, the value from
// the last list will be present in the result
func mergeResourceLists(resourceLists ...corev1.ResourceList) corev1.ResourceList {
	result := corev1.ResourceList{}
	for _, rl := range resourceLists {
		for resource, quantity := range rl {
			result[resource] = quantity
		}
	}
	return result
}

func getResourceList(cpu, memory string) corev1.ResourceList {
	res := corev1.ResourceList{}
	if cpu != "" {
		res[corev1.ResourceCPU] = resource.MustParse(cpu)
	}
	if memory != "" {
		res[corev1.ResourceMemory] = resource.MustParse(memory)
	}
	return res
}

var nodeAllocatable = mergeResourceLists(getResourceList("4", "12Gi"))
var node = &corev1.Node{
	ObjectMeta: metav1.ObjectMeta{
		Name: "foo",
	},
	Status: corev1.NodeStatus{
		Allocatable: nodeAllocatable,
	},
}

var pods = []*corev1.Pod{
	{
		ObjectMeta: metav1.ObjectMeta{
			Namespace: "foo",
			Name:      "pod-with-resources",
		},
		TypeMeta: metav1.TypeMeta{
			Kind: "Pod",
		},
		Spec: corev1.PodSpec{
			NodeName: node.Name,
			Containers: []corev1.Container{
				{
					Name:  "cpu-mem",
					Image: "image:latest",
					Resources: corev1.ResourceRequirements{
						Requests: getResourceList("1", "1Gi"),
						Limits:   getResourceList("2", "2Gi"),
					},
				},
			},
		},
		Status: corev1.PodStatus{
			Phase: corev1.PodRunning,
		},
	},
	{
		ObjectMeta: metav1.ObjectMeta{
			Namespace: "foo2",
			Name:      "pod-with-resources",
		},
		TypeMeta: metav1.TypeMeta{
			Kind: "Pod",
		},
		Spec: corev1.PodSpec{
			NodeName: node.Name,
			Containers: []corev1.Container{
				{
					Name:  "cpu-mem",
					Image: "image:latest",
					Resources: corev1.ResourceRequirements{
						Requests: getResourceList("1", "1Gi"),
						Limits:   getResourceList("2", "2Gi"),
					},
				},
			},
		},
		Status: corev1.PodStatus{
			Phase: corev1.PodRunning,
		},
	},
}

var expectedAnnotations = map[string]string{
	nodeCPURequests:            "2",
	nodeCPULimits:              "4",
	nodeCPURequestsFraction:    "50%",
	nodeCPULimitsFraction:      "100%",
	nodeMemoryRequests:         "2Gi",
	nodeMemoryLimits:           "4Gi",
	nodeMemoryRequestsFraction: "16%",
	nodeMemoryLimitsFraction:   "33%",
}

func TestNodesGetterGet(t *testing.T) {
	fake := fake.NewSimpleClientset(node, pods[0], pods[1])

	informer := informers.NewSharedInformerFactory(fake, 0)
	informer.Core().V1().Nodes().Informer().GetIndexer().Add(node)
	for _, pod := range pods {
		informer.Core().V1().Pods().Informer().GetIndexer().Add(pod)
	}

	nodeGetter := New(informer)
	got, err := nodeGetter.Get("", node.Name)
	if err != nil {
		t.Fatal(err)
	}
	nodeGot := got.(*corev1.Node)

	if diff := cmp.Diff(nodeGot.Annotations, expectedAnnotations); len(diff) != 0 {
		t.Errorf("%T, diff(-got, +expected), %v", expectedAnnotations, nodeGot.Annotations)
	}

}

func TestListNodes(t *testing.T) {
	tests := []struct {
		query    *query.Query
		expected *api.ListResult
	}{
		{
			&query.Query{
				Pagination: &query.Pagination{
					Limit:  1,
					Offset: 0,
				},
				SortBy:    query.FieldName,
				Ascending: false,
				Filters:   map[query.Field]query.Value{query.FieldName: query.Value(node2.Name)},
			},
			&api.ListResult{
				Items: []interface{}{
					node2,
				},
				TotalItems: 1,
			},
		},
		{
			&query.Query{
				Pagination: &query.Pagination{
					Limit:  1,
					Offset: 0,
				},
				SortBy:    query.FieldName,
				Ascending: false,
				Filters:   map[query.Field]query.Value{query.FieldStatus: query.Value(statusUnschedulable)},
			},
			&api.ListResult{
				Items: []interface{}{
					node1,
				},
				TotalItems: 1,
			},
		},
		{
			&query.Query{
				Pagination: &query.Pagination{
					Limit:  1,
					Offset: 0,
				},
				SortBy:    query.FieldName,
				Ascending: false,
				Filters:   map[query.Field]query.Value{query.FieldStatus: query.Value(statusRunning)},
			},
			&api.ListResult{
				Items: []interface{}{
					node2,
				},
				TotalItems: 1,
			},
		},
	}

	getter := prepare()

	for index, test := range tests {
		t.Run(strconv.Itoa(index), func(t *testing.T) {

			got, err := getter.List("", test.query)

			if err != nil {
				t.Error(err)
			}

			if diff := cmp.Diff(got, test.expected); diff != "" {
				t.Errorf("%T differ (-got, +want): %s", test.expected, diff)
			}
		})
	}

}

var (
	node1 = &corev1.Node{
		ObjectMeta: metav1.ObjectMeta{
			Name: "node1",
		},
		Spec: corev1.NodeSpec{
			Unschedulable: true,
		},
	}
	node2 = &corev1.Node{
		ObjectMeta: metav1.ObjectMeta{
			Name: "node2",
		},
		Spec: corev1.NodeSpec{
			Unschedulable: false,
		},
	}
	nodes = []*corev1.Node{node1, node2}
)

func prepare() v1alpha3.Interface {

	fake := fake.NewSimpleClientset(node1, node2)

	informer := informers.NewSharedInformerFactory(fake, 0)
	for _, node := range nodes {
		informer.Core().V1().Nodes().Informer().GetIndexer().Add(node)
	}

	return New(informer)
}