feat(nas): automatic CNFS switching when mounting NAS volumes #1262
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,202 @@ | ||
| package nas | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "net" | ||
| "testing" | ||
|
|
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| "github.com/container-storage-interface/spec/lib/go/csi" | ||
| "github.com/kubernetes-sigs/alibaba-cloud-csi-driver/pkg/cnfs/v1beta1" | ||
| "github.com/kubernetes-sigs/alibaba-cloud-csi-driver/pkg/nas/internal" | ||
| "github.com/kubernetes-sigs/alibaba-cloud-csi-driver/pkg/utils" | ||
| "github.com/stretchr/testify/assert" | ||
| v1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/client-go/kubernetes/fake" | ||
| "k8s.io/client-go/tools/record" | ||
| ) | ||
|
|
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| type fakeCNFSGetter struct { | ||
| cnfsMap map[string]*v1beta1.ContainerNetworkFileSystem | ||
| } | ||
|
|
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| func newFakeCNFSGetter(cnfsList ...*v1beta1.ContainerNetworkFileSystem) *fakeCNFSGetter { | ||
| cnfsMap := make(map[string]*v1beta1.ContainerNetworkFileSystem) | ||
| for _, cnfs := range cnfsList { | ||
| if cnfs != nil { | ||
| cnfsMap[cnfs.Name] = cnfs | ||
| } | ||
| } | ||
| return &fakeCNFSGetter{cnfsMap} | ||
| } | ||
|
|
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| func (f *fakeCNFSGetter) GetCNFS(_ context.Context, name string) (*v1beta1.ContainerNetworkFileSystem, error) { | ||
| if cnfs, ok := f.cnfsMap[name]; ok { | ||
| return cnfs, nil | ||
| } | ||
| return nil, fmt.Errorf("CNFS %s not found", name) | ||
| } | ||
|
|
||
| func startListeningFor(addr string) { | ||
| listener, err := net.Listen("tcp", addr) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| defer listener.Close() | ||
|
|
||
| for { | ||
| conn, _ := listener.Accept() | ||
| if conn != nil { | ||
| conn.Close() | ||
| } | ||
| } | ||
|
Comment on lines
+48
to
+53
There was a problem hiding this comment. This will not terminate after the test case finishes. How about making use of |
||
| } | ||
|
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| func fakeCNFS(name, status, server, fallbackName string, fallbackStrategy v1beta1.FallbackStrategy) *v1beta1.ContainerNetworkFileSystem { | ||
| return &v1beta1.ContainerNetworkFileSystem{ | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Name: name, | ||
| }, | ||
| Status: v1beta1.ContainerNetworkFileSystemStatus{ | ||
| Status: status, | ||
| }, | ||
| Spec: v1beta1.ContainerNetworkFileSystemSpec{ | ||
| Fallback: v1beta1.Fallback{ | ||
| Name: fallbackName, | ||
| Strategy: fallbackStrategy, | ||
| }, | ||
| Parameters: v1beta1.Parameters{ | ||
| Server: server, | ||
| }, | ||
| }, | ||
| } | ||
| } | ||
|
|
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| func TestCNFSNeedsFallback(t *testing.T) { | ||
| tests := []struct { | ||
| name string | ||
| cnfs *v1beta1.ContainerNetworkFileSystem | ||
| expected bool | ||
| }{ | ||
| { | ||
| name: "Nil CNFS", | ||
| cnfs: nil, | ||
| expected: false, | ||
| }, | ||
| { | ||
| name: "Always fallback strategy", | ||
| cnfs: fakeCNFS("", "", "", "", v1beta1.FallbackStrategyAlways), | ||
| expected: true, | ||
| }, | ||
| { | ||
| name: "IfConnectFailed fallback strategy-server reachable", | ||
| cnfs: fakeCNFS("", "", "localhost", "", v1beta1.FallbackStrategyIfConnectFailed), | ||
| expected: false, | ||
| }, | ||
| { | ||
| name: "IfMountTargetUnhealthy fallback strategy-status Available", | ||
| cnfs: fakeCNFS("", v1beta1.StatusAvailable, "", "", v1beta1.FallbackStrategyIfMountTargetUnhealthy), | ||
| expected: false, | ||
| }, | ||
| { | ||
| name: "IfMountTargetUnhealthy fallback strategy-status Unavailable", | ||
| cnfs: fakeCNFS("", v1beta1.StatusUnavailable, "", "", v1beta1.FallbackStrategyIfMountTargetUnhealthy), | ||
| expected: true, | ||
| }, | ||
| } | ||
|
|
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| go startListeningFor("localhost:2049") | ||
| for _, tt := range tests { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| actual := cnfsNeedsFallback(tt.cnfs) | ||
| assert.Equal(t, tt.expected, actual) | ||
| }) | ||
| } | ||
| } | ||
|
|
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| func TestFallbackCNFSAndRecord(t *testing.T) { | ||
| client := fake.NewSimpleClientset(&v1.Pod{ | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Name: "pod1", | ||
| Namespace: "default", | ||
| }, | ||
| }) | ||
| req := &csi.NodePublishVolumeRequest{ | ||
| VolumeContext: map[string]string{ | ||
| utils.PodNameKey: "pod1", | ||
| utils.PodNamespaceKey: "default", | ||
| }, | ||
| } | ||
| eventRecorder := record.NewFakeRecorder(5) | ||
| ctx, _ := utils.WithPodInfo(context.Background(), client, req) | ||
|
|
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| primaryCNFSName, fallbackCNFSName := "primary", "fallback" | ||
| tests := []struct { | ||
| name string | ||
| primaryCNFS *v1beta1.ContainerNetworkFileSystem | ||
| fallbackCNFS *v1beta1.ContainerNetworkFileSystem | ||
| expectFallback bool | ||
| expectErr bool | ||
| }{ | ||
| { | ||
| name: "Always fallback strategy", | ||
| primaryCNFS: fakeCNFS(primaryCNFSName, "", "", fallbackCNFSName, v1beta1.FallbackStrategyAlways), | ||
| fallbackCNFS: fakeCNFS(fallbackCNFSName, "", "", "", ""), | ||
| expectFallback: true, | ||
| }, | ||
| { | ||
| name: "IfConnectFailed fallback strategy", | ||
| primaryCNFS: fakeCNFS(primaryCNFSName, "", "", fallbackCNFSName, v1beta1.FallbackStrategyIfConnectFailed), | ||
| fallbackCNFS: fakeCNFS(fallbackCNFSName, "", "", "", ""), | ||
| expectFallback: true, | ||
| }, | ||
| { | ||
| name: "IfMountTargetUnhealthy fallback strategy", | ||
| primaryCNFS: fakeCNFS(primaryCNFSName, v1beta1.StatusUnavailable, "", fallbackCNFSName, v1beta1.FallbackStrategyIfMountTargetUnhealthy), | ||
| fallbackCNFS: fakeCNFS(fallbackCNFSName, "", "", "", ""), | ||
| expectFallback: true, | ||
| }, | ||
| { | ||
| name: "Non-existent fallback CNFS", | ||
| primaryCNFS: fakeCNFS("primary", "", "", "non-existent-cnfs", ""), | ||
| fallbackCNFS: fakeCNFS(fallbackCNFSName, "", "", "", ""), | ||
| expectErr: true, | ||
| }, | ||
| } | ||
|
|
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| for _, tt := range tests { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| cnfsGetter := newFakeCNFSGetter(tt.fallbackCNFS) | ||
| server := nodeServer{ | ||
| config: &internal.NodeConfig{ | ||
| KubeClient: client, | ||
| CNFSGetter: cnfsGetter, | ||
| }, | ||
| recorder: eventRecorder, | ||
| } | ||
| actual, err := server.fallbackCNFSAndRecord(ctx, req, tt.primaryCNFS) | ||
| if tt.expectErr { | ||
| assert.Error(t, err) | ||
| } else { | ||
| if tt.expectFallback { | ||
| assert.Equal(t, *tt.fallbackCNFS, *actual) | ||
| assert.Len(t, eventRecorder.Events, 1) | ||
|
|
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| oldCNFSName, newCNFSName := tt.primaryCNFS.Name, tt.fallbackCNFS.Name | ||
| msg := <-eventRecorder.Events | ||
| switch tt.primaryCNFS.Spec.Fallback.Strategy { | ||
| case v1beta1.FallbackStrategyAlways: | ||
| assert.Contains(t, msg, fmt.Sprintf(cnfsAlwaysFallbackEventTmpl, oldCNFSName, newCNFSName)) | ||
| case v1beta1.FallbackStrategyIfConnectFailed: | ||
| assert.Contains(t, msg, fmt.Sprintf(cnfsIfConnectFailedFallbackEventTmpl, oldCNFSName, newCNFSName)) | ||
| case v1beta1.FallbackStrategyIfMountTargetUnhealthy: | ||
| assert.Contains(t, msg, fmt.Sprintf(cnfsIfMountTargetUnhealthyFallbackEventTmpl, oldCNFSName, newCNFSName)) | ||
| } | ||
|
Comment on lines
+188
to
+195
There was a problem hiding this comment. How about add a expectedEvent field to |
||
| } else { | ||
| assert.Equal(t, *tt.primaryCNFS, *actual) | ||
| } | ||
| } | ||
| }) | ||
| } | ||
| } | ||
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Better to use
DialContextand explicitly close the returned conn object.