Add requests to nodes (#2078)

* add requests and limits to nodes

* add requests and limits to nodes

go.mod

@@ -98,6 +98,7 @@ require (
 	k8s.io/gengo v0.0.0-20191120174120-e74f70b9b27e // indirect
 	k8s.io/klog v1.0.0
 	k8s.io/kube-openapi v0.0.0-20191107075043-30be4d16710a
+	k8s.io/kubectl v0.17.3
 	kubesphere.io/im v0.1.0 // indirect
 	openpitrix.io/iam v0.1.0 // indirect
 	openpitrix.io/openpitrix v0.4.1-0.20190920134345-4d2be6e4965c

pkg/kapis/resources/v1alpha3/register.go

@@ -32,6 +32,7 @@ import (
 const (
 	GroupName = "resources.kubesphere.io"
 
+	tagClusteredResource  = "Clustered Resource"
 	tagComponentStatus    = "Component Status"
 	tagNamespacedResource = "Namespaced Resource"
 
@@ -47,7 +48,7 @@ func AddToContainer(c *restful.Container, informerFactory informers.InformerFact
 
 	webservice.Route(webservice.GET("/{resources}").
 		To(handler.handleListResources).
-		Metadata(restfulspec.KeyOpenAPITags, []string{tagNamespacedResource}).
+		Metadata(restfulspec.KeyOpenAPITags, []string{tagClusteredResource}).
 		Doc("Cluster level resources").
 		Param(webservice.PathParameter("resources", "cluster level resource type, e.g. pods,jobs,configmaps,services.")).
 		Param(webservice.QueryParameter(query.ParameterName, "name used to do filtering").Required(false)).
@@ -57,6 +58,14 @@ func AddToContainer(c *restful.Container, informerFactory informers.InformerFact
 		Param(webservice.QueryParameter(query.ParameterOrderBy, "sort parameters, e.g. orderBy=createTime")).
 		Returns(http.StatusOK, ok, api.ListResult{}))
 
+	webservice.Route(webservice.GET("/{resources}/{name}").
+		To(handler.handleGetResources).
+		Metadata(restfulspec.KeyOpenAPITags, []string{tagClusteredResource}).
+		Doc("Cluster level resource").
+		Param(webservice.PathParameter("resources", "cluster level resource type, e.g. pods,jobs,configmaps,services.")).
+		Param(webservice.PathParameter("name", "the name of the clustered resources")).
+		Returns(http.StatusOK, api.StatusOK, nil))
+
 	webservice.Route(webservice.GET("/namespaces/{namespace}/{resources}").
 		To(handler.handleListResources).
 		Metadata(restfulspec.KeyOpenAPITags, []string{tagNamespacedResource}).

pkg/models/resources/v1alpha3/node/nodes.go

@@ -0,0 +1,164 @@
+package node
+
+import (
+	"fmt"
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
+	resourceheper "k8s.io/kubectl/pkg/util/resource"
+	"kubesphere.io/kubesphere/pkg/api"
+	clusterv1alpha1 "kubesphere.io/kubesphere/pkg/apis/cluster/v1alpha1"
+	"kubesphere.io/kubesphere/pkg/apiserver/query"
+	"kubesphere.io/kubesphere/pkg/models/resources/v1alpha3"
+)
+
+// Those annotations were added to node only for display purposes
+const (
+	nodeCPURequests            = "node.kubesphere.io/cpu-requests"
+	nodeMemoryRequests         = "node.kubesphere.io/memory-requests"
+	nodeCPULimits              = "node.kubesphere.io/cpu-limits"
+	nodeMemoryLimits           = "node.kubesphere.io/memory-limits"
+	nodeCPURequestsFraction    = "node.kubesphere.io/cpu-requests-fraction"
+	nodeCPULimitsFraction      = "node.kubesphere.io/cpu-limits-fraction"
+	nodeMemoryRequestsFraction = "node.kubesphere.io/memory-requests-fraction"
+	nodeMemoryLimitsFraction   = "node.kubesphere.io/memory-limits-fraction"
+)
+
+type nodesGetter struct {
+	informers informers.SharedInformerFactory
+}
+
+func New(informers informers.SharedInformerFactory) v1alpha3.Interface {
+	return &nodesGetter{
+		informers: informers,
+	}
+}
+
+func (c nodesGetter) Get(_, name string) (runtime.Object, error) {
+	node, err := c.informers.Core().V1().Nodes().Lister().Get(name)
+	if err != nil {
+		return nil, err
+	}
+
+	// ignore the error, skip annotating process if error happened
+	pods, _ := c.informers.Core().V1().Pods().Lister().Pods("").List(labels.Everything())
+	c.annotateNode(node, pods)
+
+	return node, nil
+}
+
+func (c nodesGetter) List(_ string, query *query.Query) (*api.ListResult, error) {
+	nodes, err := c.informers.Core().V1().Nodes().Lister().List(query.Selector())
+	if err != nil {
+		return nil, err
+	}
+
+	// ignore the error, skip annotating process if error happened
+	pods, _ := c.informers.Core().V1().Pods().Lister().Pods("").List(labels.Everything())
+	var nonTerminatedPodsList []*v1.Pod
+	for _, pod := range pods {
+		if pod.Status.Phase != v1.PodSucceeded && pod.Status.Phase != v1.PodFailed {
+			nonTerminatedPodsList = append(nonTerminatedPodsList, pod)
+		}
+	}
+
+	var result []runtime.Object
+	for _, node := range nodes {
+		c.annotateNode(node, nonTerminatedPodsList)
+		result = append(result, node)
+	}
+
+	return v1alpha3.DefaultList(result, query, c.compare, c.filter), nil
+}
+
+func (c nodesGetter) compare(left runtime.Object, right runtime.Object, field query.Field) bool {
+	leftNode, ok := left.(*v1.Node)
+	if !ok {
+		return false
+	}
+
+	rightNode, ok := right.(*v1.Node)
+	if !ok {
+		return false
+	}
+
+	return v1alpha3.DefaultObjectMetaCompare(leftNode.ObjectMeta, rightNode.ObjectMeta, field)
+}
+
+func (c nodesGetter) filter(object runtime.Object, filter query.Filter) bool {
+	cluster, ok := object.(*clusterv1alpha1.Cluster)
+	if !ok {
+		return false
+	}
+
+	return v1alpha3.DefaultObjectMetaFilter(cluster.ObjectMeta, filter)
+}
+
+// annotateNode adds cpu/memory requests usage data to node's annotations
+func (c nodesGetter) annotateNode(node *v1.Node, pods []*v1.Pod) {
+	if len(pods) == 0 {
+		return
+	}
+
+	var nodePods []*v1.Pod
+	for _, pod := range pods {
+		if pod.Spec.NodeName == node.Name {
+			nodePods = append(nodePods, pod)
+		}
+	}
+
+	reqs, limits := c.getPodsTotalRequestAndLimits(nodePods)
+
+	if node.Annotations == nil {
+		node.Annotations = make(map[string]string)
+	}
+
+	cpuReqs, cpuLimits, memoryReqs, memoryLimits := reqs[v1.ResourceCPU], limits[v1.ResourceCPU], reqs[v1.ResourceMemory], limits[v1.ResourceMemory]
+	node.Annotations[nodeCPURequests] = cpuReqs.String()
+	node.Annotations[nodeCPULimits] = cpuLimits.String()
+	node.Annotations[nodeMemoryRequests] = memoryReqs.String()
+	node.Annotations[nodeMemoryLimits] = memoryLimits.String()
+
+	fractionCpuReqs, fractionCpuLimits := float64(0), float64(0)
+	allocatable := node.Status.Allocatable
+	if allocatable.Cpu().MilliValue() != 0 {
+		fractionCpuReqs = float64(cpuReqs.MilliValue()) / float64(allocatable.Cpu().MilliValue()) * 100
+		fractionCpuLimits = float64(cpuLimits.MilliValue()) / float64(allocatable.Cpu().MilliValue()) * 100
+	}
+	fractionMemoryReqs, fractionMemoryLimits := float64(0), float64(0)
+	if allocatable.Memory().Value() != 0 {
+		fractionMemoryReqs = float64(memoryReqs.Value()) / float64(allocatable.Memory().Value()) * 100
+		fractionMemoryLimits = float64(memoryLimits.Value()) / float64(allocatable.Memory().Value()) * 100
+	}
+
+	node.Annotations[nodeCPURequestsFraction] = fmt.Sprintf("%d%%", int(fractionCpuReqs))
+	node.Annotations[nodeCPULimitsFraction] = fmt.Sprintf("%d%%", int(fractionCpuLimits))
+	node.Annotations[nodeMemoryRequestsFraction] = fmt.Sprintf("%d%%", int(fractionMemoryReqs))
+	node.Annotations[nodeMemoryLimitsFraction] = fmt.Sprintf("%d%%", int(fractionMemoryLimits))
+}
+
+func (c nodesGetter) getPodsTotalRequestAndLimits(pods []*v1.Pod) (reqs map[v1.ResourceName]resource.Quantity, limits map[v1.ResourceName]resource.Quantity) {
+	reqs, limits = map[v1.ResourceName]resource.Quantity{}, map[v1.ResourceName]resource.Quantity{}
+	for _, pod := range pods {
+		podReqs, podLimits := resourceheper.PodRequestsAndLimits(pod)
+		for podReqName, podReqValue := range podReqs {
+			if value, ok := reqs[podReqName]; !ok {
+				reqs[podReqName] = podReqValue.DeepCopy()
+			} else {
+				value.Add(podReqValue)
+				reqs[podReqName] = value
+			}
+		}
+		for podLimitName, podLimitValue := range podLimits {
+			if value, ok := limits[podLimitName]; !ok {
+				limits[podLimitName] = podLimitValue.DeepCopy()
+			} else {
+				value.Add(podLimitValue)
+				limits[podLimitName] = value
+			}
+		}
+	}
+	return
+}

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

@@ -0,0 +1,130 @@
+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"
+	"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{
+	&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,
+		},
+	},
+	&corev1.Pod{
+		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)
+	}
+
+}

pkg/models/resources/v1alpha3/resource/resource.go

@@ -39,6 +39,7 @@ import (
 	"kubesphere.io/kubesphere/pkg/models/resources/v1alpha3/globalrole"
 	"kubesphere.io/kubesphere/pkg/models/resources/v1alpha3/namespace"
 	"kubesphere.io/kubesphere/pkg/models/resources/v1alpha3/networkpolicy"
+	"kubesphere.io/kubesphere/pkg/models/resources/v1alpha3/node"
 	"kubesphere.io/kubesphere/pkg/models/resources/v1alpha3/persistentvolumeclaim"
 	"kubesphere.io/kubesphere/pkg/models/resources/v1alpha3/pod"
 	"kubesphere.io/kubesphere/pkg/models/resources/v1alpha3/role"
@@ -61,6 +62,7 @@ func NewResourceGetter(factory informers.InformerFactory) *ResourceGetter {
 	getters[schema.GroupVersionResource{Group: "", Version: "v1", Resource: "namespaces"}] = namespace.New(factory.KubernetesSharedInformerFactory())
 	getters[schema.GroupVersionResource{Group: "", Version: "v1", Resource: "configmaps"}] = configmap.New(factory.KubernetesSharedInformerFactory())
 	getters[schema.GroupVersionResource{Group: "", Version: "v1", Resource: "pods"}] = pod.New(factory.KubernetesSharedInformerFactory())
+	getters[schema.GroupVersionResource{Group: "", Version: "v1", Resource: "nodes"}] = node.New(factory.KubernetesSharedInformerFactory())
 	getters[schema.GroupVersionResource{Group: "app.k8s.io", Version: "v1beta1", Resource: "applications"}] = application.New(factory.ApplicationSharedInformerFactory())
 	getters[schema.GroupVersionResource{Group: "networking.k8s.io", Version: "v1", Resource: "networkpolicies"}] = networkpolicy.New(factory.KubernetesSharedInformerFactory())
 	getters[tenantv1alpha1.SchemeGroupVersion.WithResource(tenantv1alpha1.ResourcePluralWorkspace)] = workspace.New(factory.KubeSphereSharedInformerFactory())

vendor/k8s.io/kubectl/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright {yyyy} {name of copyright owner}
+
+   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.

vendor/k8s.io/kubectl/pkg/util/resource/resource.go

@@ -0,0 +1,152 @@
+/*
+Copyright 2018 The Kubernetes 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 resource
+
+import (
+	"fmt"
+	"math"
+	"strconv"
+	"strings"
+
+	corev1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
+	"k8s.io/apimachinery/pkg/util/sets"
+)
+
+// PodRequestsAndLimits returns a dictionary of all defined resources summed up for all
+// containers of the pod. If pod overhead is non-nil, the pod overhead is added to the
+// total container resource requests and to the total container limits which have a
+// non-zero quantity.
+func PodRequestsAndLimits(pod *corev1.Pod) (reqs, limits corev1.ResourceList) {
+	reqs, limits = corev1.ResourceList{}, corev1.ResourceList{}
+	for _, container := range pod.Spec.Containers {
+		addResourceList(reqs, container.Resources.Requests)
+		addResourceList(limits, container.Resources.Limits)
+	}
+	// init containers define the minimum of any resource
+	for _, container := range pod.Spec.InitContainers {
+		maxResourceList(reqs, container.Resources.Requests)
+		maxResourceList(limits, container.Resources.Limits)
+	}
+
+	// Add overhead for running a pod to the sum of requests and to non-zero limits:
+	if pod.Spec.Overhead != nil {
+		addResourceList(reqs, pod.Spec.Overhead)
+
+		for name, quantity := range pod.Spec.Overhead {
+			if value, ok := limits[name]; ok && !value.IsZero() {
+				value.Add(quantity)
+				limits[name] = value
+			}
+		}
+	}
+	return
+}
+
+// addResourceList adds the resources in newList to list
+func addResourceList(list, new corev1.ResourceList) {
+	for name, quantity := range new {
+		if value, ok := list[name]; !ok {
+			list[name] = quantity.DeepCopy()
+		} else {
+			value.Add(quantity)
+			list[name] = value
+		}
+	}
+}
+
+// maxResourceList sets list to the greater of list/newList for every resource
+// either list
+func maxResourceList(list, new corev1.ResourceList) {
+	for name, quantity := range new {
+		if value, ok := list[name]; !ok {
+			list[name] = quantity.DeepCopy()
+			continue
+		} else {
+			if quantity.Cmp(value) > 0 {
+				list[name] = quantity.DeepCopy()
+			}
+		}
+	}
+}
+
+// ExtractContainerResourceValue extracts the value of a resource
+// in an already known container
+func ExtractContainerResourceValue(fs *corev1.ResourceFieldSelector, container *corev1.Container) (string, error) {
+	divisor := resource.Quantity{}
+	if divisor.Cmp(fs.Divisor) == 0 {
+		divisor = resource.MustParse("1")
+	} else {
+		divisor = fs.Divisor
+	}
+
+	switch fs.Resource {
+	case "limits.cpu":
+		return convertResourceCPUToString(container.Resources.Limits.Cpu(), divisor)
+	case "limits.memory":
+		return convertResourceMemoryToString(container.Resources.Limits.Memory(), divisor)
+	case "limits.ephemeral-storage":
+		return convertResourceEphemeralStorageToString(container.Resources.Limits.StorageEphemeral(), divisor)
+	case "requests.cpu":
+		return convertResourceCPUToString(container.Resources.Requests.Cpu(), divisor)
+	case "requests.memory":
+		return convertResourceMemoryToString(container.Resources.Requests.Memory(), divisor)
+	case "requests.ephemeral-storage":
+		return convertResourceEphemeralStorageToString(container.Resources.Requests.StorageEphemeral(), divisor)
+	}
+
+	return "", fmt.Errorf("Unsupported container resource : %v", fs.Resource)
+}
+
+// convertResourceCPUToString converts cpu value to the format of divisor and returns
+// ceiling of the value.
+func convertResourceCPUToString(cpu *resource.Quantity, divisor resource.Quantity) (string, error) {
+	c := int64(math.Ceil(float64(cpu.MilliValue()) / float64(divisor.MilliValue())))
+	return strconv.FormatInt(c, 10), nil
+}
+
+// convertResourceMemoryToString converts memory value to the format of divisor and returns
+// ceiling of the value.
+func convertResourceMemoryToString(memory *resource.Quantity, divisor resource.Quantity) (string, error) {
+	m := int64(math.Ceil(float64(memory.Value()) / float64(divisor.Value())))
+	return strconv.FormatInt(m, 10), nil
+}
+
+// convertResourceEphemeralStorageToString converts ephemeral storage value to the format of divisor and returns
+// ceiling of the value.
+func convertResourceEphemeralStorageToString(ephemeralStorage *resource.Quantity, divisor resource.Quantity) (string, error) {
+	m := int64(math.Ceil(float64(ephemeralStorage.Value()) / float64(divisor.Value())))
+	return strconv.FormatInt(m, 10), nil
+}
+
+var standardContainerResources = sets.NewString(
+	string(corev1.ResourceCPU),
+	string(corev1.ResourceMemory),
+	string(corev1.ResourceEphemeralStorage),
+)
+
+// IsStandardContainerResourceName returns true if the container can make a resource request
+// for the specified resource
+func IsStandardContainerResourceName(str string) bool {
+	return standardContainerResources.Has(str) || IsHugePageResourceName(corev1.ResourceName(str))
+}
+
+// IsHugePageResourceName returns true if the resource name has the huge page
+// resource prefix.
+func IsHugePageResourceName(name corev1.ResourceName) bool {
+	return strings.HasPrefix(string(name), corev1.ResourceHugePagesPrefix)
+}

vendor/modules.txt

@@ -1332,6 +1332,8 @@ k8s.io/kube-openapi/pkg/schemaconv
 k8s.io/kube-openapi/pkg/util
 k8s.io/kube-openapi/pkg/util/proto
 k8s.io/kube-openapi/pkg/util/sets
+# k8s.io/kubectl v0.17.3 => k8s.io/kubectl v0.17.3
+k8s.io/kubectl/pkg/util/resource
 # k8s.io/utils v0.0.0-20191114184206-e782cd3c129f => k8s.io/utils v0.0.0-20191114184206-e782cd3c129f
 k8s.io/utils/buffer
 k8s.io/utils/integer