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https://github.com/k3s-io/kubernetes.git
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implement taints and tolerations
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Kevin
299
pkg/kubectl/cmd/taint_test.go
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299
pkg/kubectl/cmd/taint_test.go
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/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cmd
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import (
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"bytes"
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"encoding/json"
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"io/ioutil"
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"net/http"
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"reflect"
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"testing"
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"time"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/unversioned"
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"k8s.io/kubernetes/pkg/client/unversioned/fake"
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"k8s.io/kubernetes/pkg/conversion"
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cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
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"k8s.io/kubernetes/pkg/runtime"
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)
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func generateNodeAndTaintedNode(oldTaints []api.Taint, newTaints []api.Taint) (*api.Node, *api.Node) {
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var taintedNode *api.Node
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oldTaintsData, _ := json.Marshal(oldTaints)
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// Create a node.
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node := &api.Node{
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ObjectMeta: api.ObjectMeta{
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Name: "node-name",
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CreationTimestamp: unversioned.Time{Time: time.Now()},
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Annotations: map[string]string{
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api.TaintsAnnotationKey: string(oldTaintsData),
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},
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},
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Spec: api.NodeSpec{
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ExternalID: "node-name",
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},
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Status: api.NodeStatus{},
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}
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clone, _ := conversion.NewCloner().DeepCopy(node)
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newTaintsData, _ := json.Marshal(newTaints)
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// A copy of the same node, but tainted.
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taintedNode = clone.(*api.Node)
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taintedNode.Annotations = map[string]string{
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api.TaintsAnnotationKey: string(newTaintsData),
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}
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return node, taintedNode
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}
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func AnnotationsHaveEqualTaints(annotationA map[string]string, annotationB map[string]string) bool {
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taintsA, err := api.GetTaintsFromNodeAnnotations(annotationA)
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if err != nil {
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return false
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}
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taintsB, err := api.GetTaintsFromNodeAnnotations(annotationB)
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if err != nil {
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return false
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}
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if len(taintsA) != len(taintsB) {
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return false
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}
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for _, taintA := range taintsA {
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found := false
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for _, taintB := range taintsB {
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if reflect.DeepEqual(taintA, taintB) {
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found = true
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break
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}
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}
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if !found {
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return false
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}
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}
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return true
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}
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func TestTaint(t *testing.T) {
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tests := []struct {
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description string
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oldTaints []api.Taint
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newTaints []api.Taint
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args []string
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expectFatal bool
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expectTaint bool
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}{
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// success cases
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{
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description: "taints a node with effect NoSchedule",
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newTaints: []api.Taint{{
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Key: "foo",
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Value: "bar",
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Effect: "NoSchedule",
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}},
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args: []string{"node", "node-name", "foo=bar:NoSchedule"},
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expectFatal: false,
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expectTaint: true,
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},
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{
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description: "taints a node with effect PreferNoSchedule",
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newTaints: []api.Taint{{
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Key: "foo",
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Value: "bar",
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Effect: "PreferNoSchedule",
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}},
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args: []string{"node", "node-name", "foo=bar:PreferNoSchedule"},
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expectFatal: false,
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expectTaint: true,
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},
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{
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description: "update an existing taint on the node, change the effect from NoSchedule to PreferNoSchedule",
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oldTaints: []api.Taint{{
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Key: "foo",
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Value: "bar",
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Effect: "NoSchedule",
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}},
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newTaints: []api.Taint{{
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Key: "foo",
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Value: "bar",
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Effect: "PreferNoSchedule",
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}},
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args: []string{"node", "node-name", "foo=bar:PreferNoSchedule", "--overwrite"},
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expectFatal: false,
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expectTaint: true,
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},
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{
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description: "taints a node with two taints",
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newTaints: []api.Taint{{
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Key: "dedicated",
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Value: "namespaceA",
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Effect: "NoSchedule",
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}, {
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Key: "foo",
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Value: "bar",
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Effect: "PreferNoSchedule",
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}},
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args: []string{"node", "node-name", "dedicated=namespaceA:NoSchedule", "foo=bar:PreferNoSchedule"},
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expectFatal: false,
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expectTaint: true,
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},
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{
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description: "node has two taints, remove one of them",
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oldTaints: []api.Taint{{
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Key: "dedicated",
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Value: "namespaceA",
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Effect: "NoSchedule",
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}, {
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Key: "foo",
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Value: "bar",
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Effect: "PreferNoSchedule",
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}},
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newTaints: []api.Taint{{
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Key: "foo",
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Value: "bar",
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Effect: "PreferNoSchedule",
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}},
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args: []string{"node", "node-name", "dedicated-"},
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expectFatal: false,
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expectTaint: true,
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},
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{
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description: "node has two taints, update one of them and remove the other",
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oldTaints: []api.Taint{{
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Key: "dedicated",
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Value: "namespaceA",
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Effect: "NoSchedule",
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}, {
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Key: "foo",
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Value: "bar",
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Effect: "PreferNoSchedule",
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}},
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newTaints: []api.Taint{{
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Key: "foo",
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Value: "bar",
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Effect: "NoSchedule",
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}},
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args: []string{"node", "node-name", "dedicated-", "foo=bar:NoSchedule", "--overwrite"},
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expectFatal: false,
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expectTaint: true,
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},
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// error cases
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{
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description: "invalid taint key",
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args: []string{"node", "node-name", "nospecialchars^@=banana:NoSchedule"},
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expectFatal: true,
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expectTaint: false,
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},
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{
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description: "invalid taint effect",
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args: []string{"node", "node-name", "foo=bar:NoExcute"},
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expectFatal: true,
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expectTaint: false,
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},
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{
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description: "can't update existing taint on the node, since 'overwrite' flag is not set",
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oldTaints: []api.Taint{{
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Key: "foo",
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Value: "bar",
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Effect: "NoSchedule",
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}},
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newTaints: []api.Taint{{
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Key: "foo",
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Value: "bar",
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Effect: "NoSchedule",
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}},
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args: []string{"node", "node-name", "foo=bar:PreferNoSchedule"},
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expectFatal: true,
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expectTaint: false,
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},
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}
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for _, test := range tests {
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oldNode, expectNewNode := generateNodeAndTaintedNode(test.oldTaints, test.newTaints)
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new_node := &api.Node{}
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tainted := false
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f, tf, codec := NewAPIFactory()
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tf.Client = &fake.RESTClient{
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Codec: codec,
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Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
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m := &MyReq{req}
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switch {
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case m.isFor("GET", "/nodes/node-name"):
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return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, oldNode)}, nil
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case m.isFor("PATCH", "/nodes/node-name"), m.isFor("PUT", "/nodes/node-name"):
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tainted = true
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data, err := ioutil.ReadAll(req.Body)
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if err != nil {
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t.Fatalf("%s: unexpected error: %v", test.description, err)
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}
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defer req.Body.Close()
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if err := runtime.DecodeInto(codec, data, new_node); err != nil {
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t.Fatalf("%s: unexpected error: %v", test.description, err)
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}
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if !AnnotationsHaveEqualTaints(expectNewNode.Annotations, new_node.Annotations) {
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t.Fatalf("%s: expected:\n%v\nsaw:\n%v\n", test.description, expectNewNode.Annotations, new_node.Annotations)
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}
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return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, new_node)}, nil
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default:
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t.Fatalf("%s: unexpected request: %v %#v\n%#v", test.description, req.Method, req.URL, req)
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return nil, nil
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}
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}),
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}
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tf.ClientConfig = defaultClientConfig()
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buf := bytes.NewBuffer([]byte{})
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cmd := NewCmdTaint(f, buf)
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saw_fatal := false
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func() {
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defer func() {
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// Recover from the panic below.
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_ = recover()
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// Restore cmdutil behavior
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cmdutil.DefaultBehaviorOnFatal()
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}()
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cmdutil.BehaviorOnFatal(func(e string) { saw_fatal = true; panic(e) })
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cmd.SetArgs(test.args)
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cmd.Execute()
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}()
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if test.expectFatal {
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if !saw_fatal {
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t.Fatalf("%s: unexpected non-error", test.description)
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}
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}
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if test.expectTaint {
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if !tainted {
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t.Fatalf("%s: node not tainted", test.description)
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}
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}
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if !test.expectTaint {
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if tainted {
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t.Fatalf("%s: unexpected taint", test.description)
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}
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}
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}
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}
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