mirror of
https://github.com/k3s-io/kubernetes.git
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347 lines
12 KiB
Go
347 lines
12 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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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 node
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import (
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"encoding/json"
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"fmt"
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"reflect"
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"sort"
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"testing"
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"github.com/stretchr/testify/assert"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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)
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func TestDeleteEdges_locked(t *testing.T) {
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cases := []struct {
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desc string
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fromType vertexType
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toType vertexType
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toNamespace string
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toName string
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start *Graph
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expect *Graph
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}{
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{
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// single edge from a configmap to a node, will delete edge and orphaned configmap
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desc: "edges and source orphans are deleted, destination orphans are preserved",
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fromType: configMapVertexType,
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toType: nodeVertexType,
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toNamespace: "",
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toName: "node1",
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start: func() *Graph {
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g := NewGraph()
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g.getOrCreateVertex_locked(configMapVertexType, "namespace1", "configmap2")
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nodeVertex := g.getOrCreateVertex_locked(nodeVertexType, "", "node1")
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configmapVertex := g.getOrCreateVertex_locked(configMapVertexType, "namespace1", "configmap1")
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g.graph.SetEdge(newDestinationEdge(configmapVertex, nodeVertex, nodeVertex))
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return g
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}(),
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expect: func() *Graph {
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g := NewGraph()
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g.getOrCreateVertex_locked(configMapVertexType, "namespace1", "configmap2")
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g.getOrCreateVertex_locked(nodeVertexType, "", "node1")
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return g
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}(),
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},
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{
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// two edges from the same configmap to distinct nodes, will delete one of the edges
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desc: "edges are deleted, non-orphans and destination orphans are preserved",
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fromType: configMapVertexType,
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toType: nodeVertexType,
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toNamespace: "",
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toName: "node2",
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start: func() *Graph {
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g := NewGraph()
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nodeVertex1 := g.getOrCreateVertex_locked(nodeVertexType, "", "node1")
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nodeVertex2 := g.getOrCreateVertex_locked(nodeVertexType, "", "node2")
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configmapVertex := g.getOrCreateVertex_locked(configMapVertexType, "namespace1", "configmap1")
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g.graph.SetEdge(newDestinationEdge(configmapVertex, nodeVertex1, nodeVertex1))
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g.graph.SetEdge(newDestinationEdge(configmapVertex, nodeVertex2, nodeVertex2))
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return g
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}(),
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expect: func() *Graph {
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g := NewGraph()
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nodeVertex1 := g.getOrCreateVertex_locked(nodeVertexType, "", "node1")
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g.getOrCreateVertex_locked(nodeVertexType, "", "node2")
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configmapVertex := g.getOrCreateVertex_locked(configMapVertexType, "namespace1", "configmap1")
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g.graph.SetEdge(newDestinationEdge(configmapVertex, nodeVertex1, nodeVertex1))
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return g
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}(),
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},
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{
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desc: "no edges to delete",
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fromType: configMapVertexType,
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toType: nodeVertexType,
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toNamespace: "",
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toName: "node1",
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start: func() *Graph {
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g := NewGraph()
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g.getOrCreateVertex_locked(nodeVertexType, "", "node1")
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g.getOrCreateVertex_locked(configMapVertexType, "namespace1", "configmap1")
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return g
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}(),
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expect: func() *Graph {
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g := NewGraph()
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g.getOrCreateVertex_locked(nodeVertexType, "", "node1")
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g.getOrCreateVertex_locked(configMapVertexType, "namespace1", "configmap1")
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return g
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}(),
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},
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{
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desc: "destination vertex does not exist",
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fromType: configMapVertexType,
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toType: nodeVertexType,
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toNamespace: "",
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toName: "node1",
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start: func() *Graph {
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g := NewGraph()
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g.getOrCreateVertex_locked(configMapVertexType, "namespace1", "configmap1")
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return g
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}(),
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expect: func() *Graph {
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g := NewGraph()
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g.getOrCreateVertex_locked(configMapVertexType, "namespace1", "configmap1")
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return g
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}(),
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},
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{
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desc: "source vertex type doesn't exist",
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fromType: configMapVertexType,
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toType: nodeVertexType,
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toNamespace: "",
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toName: "node1",
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start: func() *Graph {
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g := NewGraph()
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g.getOrCreateVertex_locked(nodeVertexType, "", "node1")
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return g
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}(),
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expect: func() *Graph {
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g := NewGraph()
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g.getOrCreateVertex_locked(nodeVertexType, "", "node1")
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return g
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}(),
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},
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}
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for _, c := range cases {
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t.Run(c.desc, func(t *testing.T) {
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c.start.deleteEdges_locked(c.fromType, c.toType, c.toNamespace, c.toName)
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// Note: We assert on substructures (graph.Nodes(), graph.Edges()) because the graph tracks
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// freed IDs for reuse, which results in an irrelevant inequality between start and expect.
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// sort the nodes by ID
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// (the slices we get back are from map iteration, where order is not guaranteed)
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expectNodes := c.expect.graph.Nodes()
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sort.Slice(expectNodes, func(i, j int) bool {
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return expectNodes[i].ID() < expectNodes[j].ID()
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})
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startNodes := c.start.graph.Nodes()
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sort.Slice(startNodes, func(i, j int) bool {
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return startNodes[i].ID() < startNodes[j].ID()
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})
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assert.Equal(t, expectNodes, startNodes)
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// sort the edges by from ID, then to ID
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// (the slices we get back are from map iteration, where order is not guaranteed)
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expectEdges := c.expect.graph.Edges()
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sort.Slice(expectEdges, func(i, j int) bool {
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if expectEdges[i].From().ID() == expectEdges[j].From().ID() {
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return expectEdges[i].To().ID() < expectEdges[j].To().ID()
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}
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return expectEdges[i].From().ID() < expectEdges[j].From().ID()
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})
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startEdges := c.start.graph.Edges()
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sort.Slice(startEdges, func(i, j int) bool {
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if startEdges[i].From().ID() == startEdges[j].From().ID() {
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return startEdges[i].To().ID() < startEdges[j].To().ID()
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}
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return startEdges[i].From().ID() < startEdges[j].From().ID()
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})
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assert.Equal(t, expectEdges, startEdges)
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// vertices is a recursive map, no need to sort
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assert.Equal(t, c.expect.vertices, c.start.vertices)
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})
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}
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}
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func TestIndex(t *testing.T) {
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g := NewGraph()
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g.destinationEdgeThreshold = 3
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a := NewAuthorizer(g, nil, nil)
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addPod := func(podNumber, nodeNumber int) {
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t.Helper()
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nodeName := fmt.Sprintf("node%d", nodeNumber)
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podName := fmt.Sprintf("pod%d", podNumber)
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pod := &corev1.Pod{
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ObjectMeta: metav1.ObjectMeta{Name: podName, Namespace: "ns", UID: types.UID(fmt.Sprintf("pod%duid1", podNumber))},
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Spec: corev1.PodSpec{
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NodeName: nodeName,
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ServiceAccountName: "sa1",
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DeprecatedServiceAccount: "sa1",
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Volumes: []corev1.Volume{
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{Name: "volume1", VolumeSource: corev1.VolumeSource{ConfigMap: &corev1.ConfigMapVolumeSource{LocalObjectReference: corev1.LocalObjectReference{Name: "cm1"}}}},
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{Name: "volume2", VolumeSource: corev1.VolumeSource{ConfigMap: &corev1.ConfigMapVolumeSource{LocalObjectReference: corev1.LocalObjectReference{Name: "cm2"}}}},
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{Name: "volume3", VolumeSource: corev1.VolumeSource{ConfigMap: &corev1.ConfigMapVolumeSource{LocalObjectReference: corev1.LocalObjectReference{Name: "cm3"}}}},
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},
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},
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}
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g.AddPod(pod)
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if ok, err := a.hasPathFrom(nodeName, configMapVertexType, "ns", "cm1"); err != nil || !ok {
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t.Errorf("expected path from %s to cm1, got %v, %v", nodeName, ok, err)
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}
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}
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toString := func(id int) string {
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for _, namespaceName := range g.vertices {
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for _, nameVertex := range namespaceName {
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for _, vertex := range nameVertex {
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if vertex.id == id {
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return vertex.String()
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}
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}
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}
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}
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return ""
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}
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expectGraph := func(expect map[string][]string) {
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t.Helper()
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actual := map[string][]string{}
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for _, node := range g.graph.Nodes() {
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sortedTo := []string{}
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for _, to := range g.graph.From(node) {
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sortedTo = append(sortedTo, toString(to.ID()))
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}
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sort.Strings(sortedTo)
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actual[toString(node.ID())] = sortedTo
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}
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if !reflect.DeepEqual(expect, actual) {
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e, _ := json.MarshalIndent(expect, "", " ")
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a, _ := json.MarshalIndent(actual, "", " ")
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t.Errorf("expected graph:\n%s\ngot:\n%s", string(e), string(a))
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}
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}
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expectIndex := func(expect map[string][]string) {
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t.Helper()
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actual := map[string][]string{}
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for from, to := range g.destinationEdgeIndex {
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sortedValues := []string{}
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for member, count := range to.members {
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sortedValues = append(sortedValues, fmt.Sprintf("%s=%d", toString(member), count))
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}
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sort.Strings(sortedValues)
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actual[toString(from)] = sortedValues
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}
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if !reflect.DeepEqual(expect, actual) {
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e, _ := json.MarshalIndent(expect, "", " ")
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a, _ := json.MarshalIndent(actual, "", " ")
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t.Errorf("expected index:\n%s\ngot:\n%s", string(e), string(a))
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}
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}
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for i := 1; i <= g.destinationEdgeThreshold; i++ {
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addPod(i, i)
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if i < g.destinationEdgeThreshold {
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// if we're under the threshold, no index expected
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expectIndex(map[string][]string{})
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}
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}
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expectGraph(map[string][]string{
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"node:node1": {},
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"node:node2": {},
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"node:node3": {},
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"pod:ns/pod1": {"node:node1"},
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"pod:ns/pod2": {"node:node2"},
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"pod:ns/pod3": {"node:node3"},
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"configmap:ns/cm1": {"pod:ns/pod1", "pod:ns/pod2", "pod:ns/pod3"},
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"configmap:ns/cm2": {"pod:ns/pod1", "pod:ns/pod2", "pod:ns/pod3"},
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"configmap:ns/cm3": {"pod:ns/pod1", "pod:ns/pod2", "pod:ns/pod3"},
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"serviceAccount:ns/sa1": {"pod:ns/pod1", "pod:ns/pod2", "pod:ns/pod3"},
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})
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expectIndex(map[string][]string{
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"configmap:ns/cm1": {"node:node1=1", "node:node2=1", "node:node3=1"},
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"configmap:ns/cm2": {"node:node1=1", "node:node2=1", "node:node3=1"},
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"configmap:ns/cm3": {"node:node1=1", "node:node2=1", "node:node3=1"},
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"serviceAccount:ns/sa1": {"node:node1=1", "node:node2=1", "node:node3=1"},
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})
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// delete one to drop below the threshold
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g.DeletePod("pod1", "ns")
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expectGraph(map[string][]string{
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"node:node2": {},
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"node:node3": {},
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"pod:ns/pod2": {"node:node2"},
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"pod:ns/pod3": {"node:node3"},
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"configmap:ns/cm1": {"pod:ns/pod2", "pod:ns/pod3"},
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"configmap:ns/cm2": {"pod:ns/pod2", "pod:ns/pod3"},
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"configmap:ns/cm3": {"pod:ns/pod2", "pod:ns/pod3"},
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"serviceAccount:ns/sa1": {"pod:ns/pod2", "pod:ns/pod3"},
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})
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expectIndex(map[string][]string{})
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// add two to get above the threshold
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addPod(1, 1)
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addPod(4, 1)
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expectGraph(map[string][]string{
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"node:node1": {},
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"node:node2": {},
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"node:node3": {},
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"pod:ns/pod1": {"node:node1"},
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"pod:ns/pod2": {"node:node2"},
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"pod:ns/pod3": {"node:node3"},
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"pod:ns/pod4": {"node:node1"},
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"configmap:ns/cm1": {"pod:ns/pod1", "pod:ns/pod2", "pod:ns/pod3", "pod:ns/pod4"},
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"configmap:ns/cm2": {"pod:ns/pod1", "pod:ns/pod2", "pod:ns/pod3", "pod:ns/pod4"},
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"configmap:ns/cm3": {"pod:ns/pod1", "pod:ns/pod2", "pod:ns/pod3", "pod:ns/pod4"},
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"serviceAccount:ns/sa1": {"pod:ns/pod1", "pod:ns/pod2", "pod:ns/pod3", "pod:ns/pod4"},
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})
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expectIndex(map[string][]string{
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"configmap:ns/cm1": {"node:node1=2", "node:node2=1", "node:node3=1"},
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"configmap:ns/cm2": {"node:node1=2", "node:node2=1", "node:node3=1"},
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"configmap:ns/cm3": {"node:node1=2", "node:node2=1", "node:node3=1"},
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"serviceAccount:ns/sa1": {"node:node1=2", "node:node2=1", "node:node3=1"},
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})
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// delete one to remain above the threshold
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g.DeletePod("pod1", "ns")
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expectGraph(map[string][]string{
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"node:node1": {},
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"node:node2": {},
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"node:node3": {},
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"pod:ns/pod2": {"node:node2"},
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"pod:ns/pod3": {"node:node3"},
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"pod:ns/pod4": {"node:node1"},
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"configmap:ns/cm1": {"pod:ns/pod2", "pod:ns/pod3", "pod:ns/pod4"},
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"configmap:ns/cm2": {"pod:ns/pod2", "pod:ns/pod3", "pod:ns/pod4"},
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"configmap:ns/cm3": {"pod:ns/pod2", "pod:ns/pod3", "pod:ns/pod4"},
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"serviceAccount:ns/sa1": {"pod:ns/pod2", "pod:ns/pod3", "pod:ns/pod4"},
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})
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expectIndex(map[string][]string{
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"configmap:ns/cm1": {"node:node1=1", "node:node2=1", "node:node3=1"},
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"configmap:ns/cm2": {"node:node1=1", "node:node2=1", "node:node3=1"},
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"configmap:ns/cm3": {"node:node1=1", "node:node2=1", "node:node3=1"},
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"serviceAccount:ns/sa1": {"node:node1=1", "node:node2=1", "node:node3=1"},
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})
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}
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