mirror of https://github.com/k3s-io/k3s
381 lines
9.8 KiB
Go
381 lines
9.8 KiB
Go
/*
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Copyright 2015 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 configmap
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path"
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"reflect"
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"strings"
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"testing"
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"k8s.io/kubernetes/pkg/api"
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clientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
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"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
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"k8s.io/kubernetes/pkg/types"
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"k8s.io/kubernetes/pkg/volume"
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"k8s.io/kubernetes/pkg/volume/empty_dir"
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"k8s.io/kubernetes/pkg/volume/util"
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)
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func TestMakePayload(t *testing.T) {
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cases := []struct {
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name string
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mappings []api.KeyToPath
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configMap *api.ConfigMap
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payload map[string][]byte
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success bool
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}{
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{
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name: "no overrides",
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configMap: &api.ConfigMap{
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Data: map[string]string{
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"foo": "foo",
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"bar": "bar",
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},
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},
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payload: map[string][]byte{
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"foo": []byte("foo"),
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"bar": []byte("bar"),
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},
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success: true,
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},
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{
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name: "basic 1",
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mappings: []api.KeyToPath{
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{
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Key: "foo",
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Path: "path/to/foo.txt",
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},
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},
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configMap: &api.ConfigMap{
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Data: map[string]string{
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"foo": "foo",
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"bar": "bar",
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},
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},
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payload: map[string][]byte{
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"path/to/foo.txt": []byte("foo"),
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},
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success: true,
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},
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{
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name: "subdirs",
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mappings: []api.KeyToPath{
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{
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Key: "foo",
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Path: "path/to/1/2/3/foo.txt",
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},
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},
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configMap: &api.ConfigMap{
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Data: map[string]string{
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"foo": "foo",
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"bar": "bar",
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},
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},
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payload: map[string][]byte{
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"path/to/1/2/3/foo.txt": []byte("foo"),
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},
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success: true,
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},
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{
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name: "subdirs 2",
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mappings: []api.KeyToPath{
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{
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Key: "foo",
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Path: "path/to/1/2/3/foo.txt",
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},
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},
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configMap: &api.ConfigMap{
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Data: map[string]string{
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"foo": "foo",
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"bar": "bar",
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},
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},
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payload: map[string][]byte{
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"path/to/1/2/3/foo.txt": []byte("foo"),
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},
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success: true,
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},
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{
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name: "subdirs 3",
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mappings: []api.KeyToPath{
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{
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Key: "foo",
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Path: "path/to/1/2/3/foo.txt",
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},
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{
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Key: "bar",
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Path: "another/path/to/the/esteemed/bar.bin",
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},
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},
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configMap: &api.ConfigMap{
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Data: map[string]string{
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"foo": "foo",
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"bar": "bar",
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},
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},
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payload: map[string][]byte{
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"path/to/1/2/3/foo.txt": []byte("foo"),
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"another/path/to/the/esteemed/bar.bin": []byte("bar"),
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},
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success: true,
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},
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{
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name: "non existent key",
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mappings: []api.KeyToPath{
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{
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Key: "zab",
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Path: "path/to/foo.txt",
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},
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},
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configMap: &api.ConfigMap{
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Data: map[string]string{
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"foo": "foo",
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"bar": "bar",
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},
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},
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success: false,
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},
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}
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for _, tc := range cases {
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actualPayload, err := makePayload(tc.mappings, tc.configMap)
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if err != nil && tc.success {
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t.Errorf("%v: unexpected failure making payload: %v", tc.name, err)
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continue
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}
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if err == nil && !tc.success {
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t.Errorf("%v: unexpected success making payload", tc.name)
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continue
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}
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if !tc.success {
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continue
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}
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if e, a := tc.payload, actualPayload; !reflect.DeepEqual(e, a) {
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t.Errorf("%v: expected and actual payload do not match", tc.name)
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}
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}
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}
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func newTestHost(t *testing.T, clientset clientset.Interface) (string, volume.VolumeHost) {
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tempDir, err := ioutil.TempDir("/tmp", "configmap_volume_test.")
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if err != nil {
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t.Fatalf("can't make a temp rootdir: %v", err)
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}
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return tempDir, volume.NewFakeVolumeHost(tempDir, clientset, empty_dir.ProbeVolumePlugins())
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}
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func TestCanSupport(t *testing.T) {
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pluginMgr := volume.VolumePluginMgr{}
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_, host := newTestHost(t, nil)
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pluginMgr.InitPlugins(ProbeVolumePlugins(), host)
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plugin, err := pluginMgr.FindPluginByName(configMapPluginName)
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if err != nil {
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t.Errorf("Can't find the plugin by name")
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}
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if plugin.Name() != configMapPluginName {
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t.Errorf("Wrong name: %s", plugin.Name())
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}
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if !plugin.CanSupport(&volume.Spec{Volume: &api.Volume{VolumeSource: api.VolumeSource{ConfigMap: &api.ConfigMapVolumeSource{LocalObjectReference: api.LocalObjectReference{""}}}}}) {
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t.Errorf("Expected true")
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}
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if plugin.CanSupport(&volume.Spec{}) {
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t.Errorf("Expected false")
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}
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}
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func TestPlugin(t *testing.T) {
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var (
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testPodUID = types.UID("test_pod_uid")
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testVolumeName = "test_volume_name"
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testNamespace = "test_configmap_namespace"
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testName = "test_configmap_name"
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volumeSpec = volumeSpec(testVolumeName, testName)
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configMap = configMap(testNamespace, testName)
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client = fake.NewSimpleClientset(&configMap)
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pluginMgr = volume.VolumePluginMgr{}
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_, host = newTestHost(t, client)
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)
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pluginMgr.InitPlugins(ProbeVolumePlugins(), host)
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plugin, err := pluginMgr.FindPluginByName(configMapPluginName)
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if err != nil {
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t.Errorf("Can't find the plugin by name")
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}
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pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: testPodUID}}
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builder, err := plugin.NewBuilder(volume.NewSpecFromVolume(volumeSpec), pod, volume.VolumeOptions{})
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if err != nil {
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t.Errorf("Failed to make a new Builder: %v", err)
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}
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if builder == nil {
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t.Errorf("Got a nil Builder")
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}
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volumePath := builder.GetPath()
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if !strings.HasSuffix(volumePath, fmt.Sprintf("pods/test_pod_uid/volumes/kubernetes.io~configmap/test_volume_name")) {
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t.Errorf("Got unexpected path: %s", volumePath)
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}
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fsGroup := int64(1001)
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err = builder.SetUp(&fsGroup)
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if err != nil {
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t.Errorf("Failed to setup volume: %v", err)
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}
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if _, err := os.Stat(volumePath); err != nil {
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if os.IsNotExist(err) {
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t.Errorf("SetUp() failed, volume path not created: %s", volumePath)
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} else {
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t.Errorf("SetUp() failed: %v", err)
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}
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}
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doTestConfigMapDataInVolume(volumePath, configMap, t)
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doTestCleanAndTeardown(plugin, testPodUID, testVolumeName, volumePath, t)
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}
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// Test the case where the plugin's ready file exists, but the volume dir is not a
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// mountpoint, which is the state the system will be in after reboot. The dir
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// should be mounter and the configMap data written to it.
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func TestPluginReboot(t *testing.T) {
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var (
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testPodUID = types.UID("test_pod_uid3")
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testVolumeName = "test_volume_name"
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testNamespace = "test_configmap_namespace"
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testName = "test_configmap_name"
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volumeSpec = volumeSpec(testVolumeName, testName)
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configMap = configMap(testNamespace, testName)
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client = fake.NewSimpleClientset(&configMap)
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pluginMgr = volume.VolumePluginMgr{}
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rootDir, host = newTestHost(t, client)
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)
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pluginMgr.InitPlugins(ProbeVolumePlugins(), host)
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plugin, err := pluginMgr.FindPluginByName(configMapPluginName)
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if err != nil {
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t.Errorf("Can't find the plugin by name")
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}
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pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: testPodUID}}
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builder, err := plugin.NewBuilder(volume.NewSpecFromVolume(volumeSpec), pod, volume.VolumeOptions{})
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if err != nil {
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t.Errorf("Failed to make a new Builder: %v", err)
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}
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if builder == nil {
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t.Errorf("Got a nil Builder")
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}
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podMetadataDir := fmt.Sprintf("%v/pods/test_pod_uid3/plugins/kubernetes.io~configmap/test_volume_name", rootDir)
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util.SetReady(podMetadataDir)
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volumePath := builder.GetPath()
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if !strings.HasSuffix(volumePath, fmt.Sprintf("pods/test_pod_uid3/volumes/kubernetes.io~configmap/test_volume_name")) {
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t.Errorf("Got unexpected path: %s", volumePath)
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}
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fsGroup := int64(1001)
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err = builder.SetUp(&fsGroup)
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if err != nil {
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t.Errorf("Failed to setup volume: %v", err)
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}
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if _, err := os.Stat(volumePath); err != nil {
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if os.IsNotExist(err) {
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t.Errorf("SetUp() failed, volume path not created: %s", volumePath)
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} else {
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t.Errorf("SetUp() failed: %v", err)
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}
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}
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doTestConfigMapDataInVolume(volumePath, configMap, t)
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doTestCleanAndTeardown(plugin, testPodUID, testVolumeName, volumePath, t)
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}
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func volumeSpec(volumeName, configMapName string) *api.Volume {
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return &api.Volume{
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Name: volumeName,
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VolumeSource: api.VolumeSource{
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ConfigMap: &api.ConfigMapVolumeSource{
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LocalObjectReference: api.LocalObjectReference{
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Name: configMapName,
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},
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},
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},
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}
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}
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func configMap(namespace, name string) api.ConfigMap {
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return api.ConfigMap{
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ObjectMeta: api.ObjectMeta{
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Namespace: namespace,
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Name: name,
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},
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Data: map[string]string{
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"data-1": "value-1",
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"data-2": "value-2",
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"data-3": "value-3",
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},
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}
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}
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func doTestConfigMapDataInVolume(volumePath string, configMap api.ConfigMap, t *testing.T) {
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for key, value := range configMap.Data {
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configMapDataHostPath := path.Join(volumePath, key)
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if _, err := os.Stat(configMapDataHostPath); err != nil {
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t.Fatalf("SetUp() failed, couldn't find configMap data on disk: %v", configMapDataHostPath)
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} else {
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actualValue, err := ioutil.ReadFile(configMapDataHostPath)
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if err != nil {
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t.Fatalf("Couldn't read configMap data from: %v", configMapDataHostPath)
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}
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if value != string(actualValue) {
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t.Errorf("Unexpected value; expected %q, got %q", value, actualValue)
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}
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}
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}
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}
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func doTestCleanAndTeardown(plugin volume.VolumePlugin, podUID types.UID, testVolumeName, volumePath string, t *testing.T) {
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cleaner, err := plugin.NewCleaner(testVolumeName, podUID)
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if err != nil {
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t.Errorf("Failed to make a new Cleaner: %v", err)
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}
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if cleaner == nil {
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t.Errorf("Got a nil Cleaner")
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}
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if err := cleaner.TearDown(); err != nil {
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t.Errorf("Expected success, got: %v", err)
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}
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if _, err := os.Stat(volumePath); err == nil {
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t.Errorf("TearDown() failed, volume path still exists: %s", volumePath)
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} else if !os.IsNotExist(err) {
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t.Errorf("SetUp() failed: %v", err)
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}
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}
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