forked from rook/rook
rohan47
0876a20e7c
when a node fails some pods remains in terminating while other manage to be rescheduled on another node successfully. this commit adds code to clean up all the Rook and CSI pods that are stuck in terminating state on a failed node. Signed-off-by: rohan47 <rohgupta@redhat.com>
497 lines
15 KiB
Go
497 lines
15 KiB
Go
/*
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Copyright 2018 The Rook 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 k8sutil for Kubernetes helpers.
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package k8sutil
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import (
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"context"
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"reflect"
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"testing"
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rookv1 "github.com/rook/rook/pkg/apis/rook.io/v1"
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optest "github.com/rook/rook/pkg/operator/test"
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"github.com/stretchr/testify/assert"
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corev1 "k8s.io/api/core/v1"
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes/fake"
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)
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func createNode(nodeName string, condition v1.NodeConditionType, clientset *fake.Clientset) error {
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ctx := context.TODO()
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node := &v1.Node{
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ObjectMeta: metav1.ObjectMeta{
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Name: nodeName,
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},
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Status: v1.NodeStatus{
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Conditions: []v1.NodeCondition{
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{
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Type: condition, Status: v1.ConditionTrue,
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},
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},
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},
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}
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_, err := clientset.CoreV1().Nodes().Create(ctx, node, metav1.CreateOptions{})
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return err
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}
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func TestValidNode(t *testing.T) {
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nodeA := "nodeA"
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nodeB := "nodeB"
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storage := rookv1.StorageScopeSpec{
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Nodes: []rookv1.Node{
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{
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Name: nodeA,
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},
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{
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Name: nodeB,
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},
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},
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}
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var placement rookv1.Placement
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// set up a fake k8s client set and watcher to generate events that the operator will listen to
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clientset := fake.NewSimpleClientset()
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nodeErr := createNode(nodeA, v1.NodeReady, clientset)
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assert.Nil(t, nodeErr)
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nodeErr = createNode(nodeB, v1.NodeNetworkUnavailable, clientset)
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assert.Nil(t, nodeErr)
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validNodes := GetValidNodes(storage, clientset, placement)
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assert.Equal(t, len(validNodes), 1)
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}
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func testNode(taints []v1.Taint) v1.Node {
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n := v1.Node{}
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n.Spec.Taints = append(n.Spec.Taints, taints...)
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return n
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}
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func taintReservedForRook() v1.Taint {
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return v1.Taint{Key: "reservedForRook", Effect: v1.TaintEffectNoSchedule}
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}
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func taintReservedForOther() v1.Taint {
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return v1.Taint{Key: "reservedForNOTRook", Effect: v1.TaintEffectNoSchedule}
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}
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func taintAllWellKnown() []v1.Taint {
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taints := []v1.Taint{}
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for _, t := range WellKnownTaints {
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taints = append(taints, v1.Taint{
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// assume the "worst" with NoExecute
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Key: t, Effect: v1.TaintEffectNoExecute,
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})
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}
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return taints
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}
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func taints(taints ...v1.Taint) []v1.Taint {
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list := []v1.Taint{}
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for _, t := range taints {
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list = append(taints, t)
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}
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return list
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}
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func tolerateRook() []v1.Toleration {
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return []v1.Toleration{{Key: "reservedForRook"}}
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}
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func TestNodeIsTolerable(t *testing.T) {
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type args struct {
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node v1.Node
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tolerations []v1.Toleration
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ignoreWellKnownTaints bool
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}
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tests := []struct {
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name string
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args args
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want bool
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}{
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{name: "tolerate node w/o taints", args: args{
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node: v1.Node{},
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tolerations: tolerateRook(),
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ignoreWellKnownTaints: false,
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}, want: true},
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{name: "tolerate node w/ rook taint", args: args{
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node: testNode(taints(taintReservedForRook())),
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tolerations: tolerateRook(),
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ignoreWellKnownTaints: false,
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}, want: true},
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{name: "do not tolerate rook taint", args: args{
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node: testNode(taints(taintReservedForRook())),
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tolerations: nil,
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ignoreWellKnownTaints: false,
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}, want: false},
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{name: "do not tolerate other taint", args: args{
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node: testNode(taints(taintReservedForRook(), taintReservedForOther())),
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tolerations: tolerateRook(),
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ignoreWellKnownTaints: false,
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}, want: false},
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{name: "do not tolerate node w/ known taints", args: args{
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node: testNode(taintAllWellKnown()),
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tolerations: nil,
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ignoreWellKnownTaints: false,
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}, want: false},
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{name: "do not tolerate node w/ known taints 2", args: args{
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node: testNode(taintAllWellKnown()),
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tolerations: tolerateRook(),
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ignoreWellKnownTaints: false,
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}, want: false},
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{name: "tolerate node w/ known taints and rook taint", args: args{
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node: testNode(taintAllWellKnown()),
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tolerations: tolerateRook(),
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ignoreWellKnownTaints: true,
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}, want: true},
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{name: "do not tolerate node w/ known taints and rook taint", args: args{
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node: testNode(append(taintAllWellKnown(), taintReservedForRook())),
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tolerations: nil,
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ignoreWellKnownTaints: true,
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}, want: false},
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{name: "tolerate node w/ known taints and rook taint", args: args{
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node: testNode(append(taintAllWellKnown(), taintReservedForRook())),
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tolerations: tolerateRook(),
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ignoreWellKnownTaints: true,
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}, want: true},
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{name: "do not tolerate node w/ known and other taints", args: args{
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node: testNode(append(taintAllWellKnown(), taintReservedForRook(), taintReservedForOther())),
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tolerations: tolerateRook(),
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ignoreWellKnownTaints: true,
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}, want: false},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := NodeIsTolerable(tt.args.node, tt.args.tolerations, tt.args.ignoreWellKnownTaints); got != tt.want {
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t.Errorf("NodeIsTolerable() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestNodeIsReady(t *testing.T) {
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assert.True(t, NodeIsReady(v1.Node{Status: v1.NodeStatus{Conditions: []v1.NodeCondition{
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{Type: v1.NodeReady, Status: v1.ConditionTrue},
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}}}))
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assert.False(t, NodeIsReady(v1.Node{Status: v1.NodeStatus{Conditions: []v1.NodeCondition{
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{Type: v1.NodeReady, Status: v1.ConditionFalse},
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}}}))
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assert.False(t, NodeIsReady(v1.Node{Status: v1.NodeStatus{Conditions: []v1.NodeCondition{
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{Type: v1.NodeReady, Status: v1.ConditionUnknown},
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}}}))
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// if `Ready` condition does not exist, must assume that node is not ready
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assert.False(t, NodeIsReady(v1.Node{Status: v1.NodeStatus{Conditions: []v1.NodeCondition{
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{Type: v1.NodeDiskPressure, Status: v1.ConditionTrue},
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}}}))
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// if `Ready` condition is not accompanied by a status, must assume that node is not ready
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assert.False(t, NodeIsReady(v1.Node{Status: v1.NodeStatus{Conditions: []v1.NodeCondition{
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{Type: v1.NodeDiskPressure},
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}}}))
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}
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func TestGetRookNodesMatchingKubernetesNodes(t *testing.T) {
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ctx := context.TODO()
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clientset := optest.New(t, 3) // create nodes 0, 1, and 2
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rookNodes := []rookv1.Node{}
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getNode := func(name string) v1.Node {
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n, err := clientset.CoreV1().Nodes().Get(ctx, name, metav1.GetOptions{})
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assert.NoError(t, err)
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return *n
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}
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// no rook nodes specified
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nodes, err := GetKubernetesNodesMatchingRookNodes(rookNodes, clientset)
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assert.NoError(t, err)
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assert.Empty(t, nodes)
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// more rook nodes specified than nodes exist
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rookNodes = []rookv1.Node{
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{Name: "node0"},
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{Name: "node2"},
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{Name: "node5"}}
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nodes, err = GetKubernetesNodesMatchingRookNodes(rookNodes, clientset)
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assert.NoError(t, err)
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assert.Len(t, nodes, 2)
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assert.Contains(t, nodes, getNode("node0"))
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assert.Contains(t, nodes, getNode("node2"))
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// rook nodes match k8s nodes
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rookNodes = []rookv1.Node{
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{Name: "node0"},
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{Name: "node1"},
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{Name: "node2"}}
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nodes, err = GetKubernetesNodesMatchingRookNodes(rookNodes, clientset)
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assert.NoError(t, err)
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assert.Len(t, nodes, 3)
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assert.Contains(t, nodes, getNode("node0"))
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assert.Contains(t, nodes, getNode("node1"))
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assert.Contains(t, nodes, getNode("node2"))
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// no k8s nodes exist
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clientset = optest.New(t, 0)
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nodes, err = GetKubernetesNodesMatchingRookNodes(rookNodes, clientset)
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assert.NoError(t, err)
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assert.Len(t, nodes, 0)
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}
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func TestRookNodesMatchingKubernetesNodes(t *testing.T) {
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ctx := context.TODO()
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clientset := optest.New(t, 3) // create nodes 0, 1, and 2
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getNode := func(name string) v1.Node {
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n, err := clientset.CoreV1().Nodes().Get(ctx, name, metav1.GetOptions{})
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assert.NoError(t, err)
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return *n
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}
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n0 := getNode("node0")
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n0.Labels = map[string]string{v1.LabelHostname: "node0-hostname"}
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n1 := getNode("node1")
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n2 := getNode("node2")
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n2.Labels = map[string]string{v1.LabelHostname: "node2"}
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k8sNodes := []v1.Node{n0, n1, n2}
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// no rook nodes specified for input
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rookStorage := rookv1.StorageScopeSpec{
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Nodes: []rookv1.Node{},
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}
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retNodes := RookNodesMatchingKubernetesNodes(rookStorage, k8sNodes)
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assert.Len(t, retNodes, 0)
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// all rook nodes specified
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rookStorage.Nodes = []rookv1.Node{
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{Name: "node0"},
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{Name: "node1"},
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{Name: "node2"}}
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retNodes = RookNodesMatchingKubernetesNodes(rookStorage, k8sNodes)
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assert.Len(t, retNodes, 3)
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// this should return nodes named by hostname if that is available
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assert.Contains(t, retNodes, rookv1.Node{Name: "node0-hostname"})
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assert.Contains(t, retNodes, rookv1.Node{Name: "node1"})
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assert.Contains(t, retNodes, rookv1.Node{Name: "node2"})
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// more rook nodes specified than exist
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rookStorage.Nodes = []rookv1.Node{
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{Name: "node0-hostname"},
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{Name: "node2"},
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{Name: "node5"}}
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retNodes = RookNodesMatchingKubernetesNodes(rookStorage, k8sNodes)
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assert.Len(t, retNodes, 2)
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assert.Contains(t, retNodes, rookv1.Node{Name: "node0-hostname"})
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assert.Contains(t, retNodes, rookv1.Node{Name: "node2"})
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// no k8s nodes specified
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retNodes = RookNodesMatchingKubernetesNodes(rookStorage, []v1.Node{})
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assert.Len(t, retNodes, 0)
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}
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func TestGenerateNodeAffinity(t *testing.T) {
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type args struct {
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nodeAffinity string
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}
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tests := []struct {
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name string
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args args
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want *v1.NodeAffinity
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wantErr bool
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}{
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{
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name: "GenerateNodeAffinity",
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args: args{
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nodeAffinity: "rook.io/ceph=true",
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},
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want: &v1.NodeAffinity{
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RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
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NodeSelectorTerms: []v1.NodeSelectorTerm{
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{
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MatchExpressions: []v1.NodeSelectorRequirement{
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{
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Key: "rook.io/ceph",
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Operator: v1.NodeSelectorOpIn,
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Values: []string{"true"},
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},
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},
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},
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},
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},
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},
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wantErr: false,
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},
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{
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name: "FailGenerateNodeAffinity",
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args: args{
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nodeAffinity: "rook.io/ceph,cassandra=true",
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},
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want: nil,
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wantErr: true,
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},
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{
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name: "GenerateNodeAffinityWithKeyOnly",
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args: args{
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nodeAffinity: "rook.io/ceph",
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},
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want: &v1.NodeAffinity{
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RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
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NodeSelectorTerms: []v1.NodeSelectorTerm{
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{
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MatchExpressions: []v1.NodeSelectorRequirement{
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{
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Key: "rook.io/ceph",
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Operator: v1.NodeSelectorOpExists,
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},
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},
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},
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},
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},
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},
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wantErr: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got, err := GenerateNodeAffinity(tt.args.nodeAffinity)
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if (err != nil) != tt.wantErr {
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t.Errorf("GenerateNodeAffinity() error = %v, wantErr %v", err, tt.wantErr)
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return
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}
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if !reflect.DeepEqual(got, tt.want) {
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t.Errorf("GenerateNodeAffinity() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestTopologyLabels(t *testing.T) {
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additionalTopologyLabels := []string{
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"rack", "row", "datacenter",
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}
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nodeLabels := map[string]string{}
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topology := ExtractTopologyFromLabels(nodeLabels, additionalTopologyLabels)
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assert.Equal(t, 0, len(topology))
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// invalid non-namespaced zone and region labels are simply ignored
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nodeLabels = map[string]string{
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"region": "badregion",
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"zone": "badzone",
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}
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topology = ExtractTopologyFromLabels(nodeLabels, additionalTopologyLabels)
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assert.Equal(t, 0, len(topology))
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// invalid zone and region labels are simply ignored
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nodeLabels = map[string]string{
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"topology.rook.io/region": "r1",
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"topology.rook.io/zone": "z1",
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}
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topology = ExtractTopologyFromLabels(nodeLabels, additionalTopologyLabels)
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assert.Equal(t, 0, len(topology))
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// load all the expected labels
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nodeLabels = map[string]string{
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corev1.LabelZoneRegionStable: "r1",
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corev1.LabelZoneFailureDomainStable: "z1",
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"kubernetes.io/hostname": "myhost",
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"topology.rook.io/rack": "rack1",
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"topology.rook.io/row": "row1",
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"topology.rook.io/datacenter": "d1",
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}
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topology = ExtractTopologyFromLabels(nodeLabels, additionalTopologyLabels)
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assert.Equal(t, 6, len(topology))
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assert.Equal(t, "r1", topology["region"])
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assert.Equal(t, "z1", topology["zone"])
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assert.Equal(t, "myhost", topology["host"])
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assert.Equal(t, "rack1", topology["rack"])
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assert.Equal(t, "row1", topology["row"])
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assert.Equal(t, "d1", topology["datacenter"])
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// ensure deprecated k8s labels are loaded
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nodeLabels = map[string]string{
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corev1.LabelZoneRegion: "r1",
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corev1.LabelZoneFailureDomain: "z1",
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}
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topology = ExtractTopologyFromLabels(nodeLabels, additionalTopologyLabels)
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assert.Equal(t, 2, len(topology))
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assert.Equal(t, "r1", topology["region"])
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assert.Equal(t, "z1", topology["zone"])
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// ensure deprecated k8s labels are overridden
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nodeLabels = map[string]string{
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corev1.LabelZoneRegionStable: "r1",
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corev1.LabelZoneFailureDomainStable: "z1",
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corev1.LabelZoneRegion: "oldregion",
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corev1.LabelZoneFailureDomain: "oldzone",
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}
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topology = ExtractTopologyFromLabels(nodeLabels, additionalTopologyLabels)
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assert.Equal(t, 2, len(topology))
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assert.Equal(t, "r1", topology["region"])
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assert.Equal(t, "z1", topology["zone"])
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// invalid labels under topology.rook.io return an error
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nodeLabels = map[string]string{
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"topology.rook.io/row/bad": "r1",
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}
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topology = ExtractTopologyFromLabels(nodeLabels, additionalTopologyLabels)
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assert.Equal(t, 0, len(topology))
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}
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func TestGetNotReadyKubernetesNodes(t *testing.T) {
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ctx := context.TODO()
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clientset := optest.New(t, 0)
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//when there is no node
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nodes, err := GetNotReadyKubernetesNodes(clientset)
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assert.NoError(t, err)
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assert.Equal(t, 0, len(nodes))
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//when all the nodes are in ready state
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clientset = optest.New(t, 2)
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nodes, err = GetNotReadyKubernetesNodes(clientset)
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assert.NoError(t, err)
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assert.Equal(t, 0, len(nodes))
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//when there is a not ready node
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node := &v1.Node{
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ObjectMeta: metav1.ObjectMeta{
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Name: "failed",
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},
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Status: v1.NodeStatus{
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Conditions: []v1.NodeCondition{
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{
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Type: v1.NodeReady, Status: v1.ConditionFalse,
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},
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},
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},
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|
}
|
|
_, err = clientset.CoreV1().Nodes().Create(ctx, node, metav1.CreateOptions{})
|
|
assert.NoError(t, err)
|
|
nodes, err = GetNotReadyKubernetesNodes(clientset)
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, 1, len(nodes))
|
|
|
|
// when all the nodes are not ready
|
|
allNodes, err := clientset.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
|
|
assert.NoError(t, err)
|
|
for _, n := range allNodes.Items {
|
|
n.Status.Conditions[0].Status = v1.ConditionFalse
|
|
updateNode := n
|
|
_, err := clientset.CoreV1().Nodes().Update(ctx, &updateNode, metav1.UpdateOptions{})
|
|
assert.NoError(t, err)
|
|
}
|
|
nodes, err = GetNotReadyKubernetesNodes(clientset)
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, 3, len(nodes))
|
|
}
|