Add tests for index information export (#2412)

* Add tests for index information export

* Add comments

internal/k8s/client/client.go

@@ -181,24 +181,30 @@ func (*client) LabelSelector(key string, op selection.Operator, vals []string) (
 	return labels.NewSelector().Add(*requirements), nil
 }
 
-type Patcher struct {
+// Patcher is an interface for patching resources with controller-runtime client.
+type Patcher interface {
+	// ApplyPodAnnotations applies the given annotations to the agent pod with server-side apply.
+	ApplyPodAnnotations(ctx context.Context, name, namespace string, entries map[string]string) error
+}
+
+type patcher struct {
 	client       Client
 	fieldManager string
 }
 
 func NewPatcher(fieldManager string) (Patcher, error) {
 	client, err := New()
 	if err != nil {
-		return Patcher{}, err
+		return nil, err
 	}
 
-	return Patcher{
+	return &patcher{
 		client:       client,
 		fieldManager: fieldManager,
 	}, nil
 }
 
-func (s *Patcher) ApplyPodAnnotations(ctx context.Context, name, namespace string, entries map[string]string) error {
+func (s *patcher) ApplyPodAnnotations(ctx context.Context, name, namespace string, entries map[string]string) error {
 	var podList corev1.PodList
 	if err := s.client.List(ctx, &podList, &cli.ListOptions{
 		Namespace:     namespace,

internal/test/mock/k8s/client.go

@@ -69,3 +69,14 @@ func (m *ValdK8sClientMock) LabelSelector(key string, op selection.Operator, val
 	args := m.Called(key, op, vals)
 	return args.Get(0).(labels.Selector), args.Error(1)
 }
+
+type PatcherMock struct {
+	mock.Mock
+}
+
+var _ client.Patcher = (*PatcherMock)(nil)
+
+func (m *PatcherMock) ApplyPodAnnotations(ctx context.Context, name, namespace string, entries map[string]string) error {
+	args := m.Called(ctx, name, namespace, entries)
+	return args.Error(0)
+}

pkg/agent/core/ngt/service/export_test.go

@@ -0,0 +1,19 @@
+//
+// Copyright (C) 2019-2024 vdaas.org vald team <[email protected]>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// You may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package service
+
+var ExportMetricsOnTick = (*ngt).exportMetricsOnTick

pkg/agent/core/ngt/service/ngt.go

@@ -51,6 +51,8 @@ import (
 	"github.com/vdaas/vald/pkg/agent/internal/vqueue"
 )
 
+type contextSaveIndexTimeKey string
+
 type NGT interface {
 	Start(ctx context.Context) <-chan error
 	Search(ctx context.Context, vec []float32, size uint32, epsilon, radius float32) (*payload.Search_Response, error)
@@ -161,12 +163,14 @@ const (
 	originIndexDirName = "origin"
 	brokenIndexDirName = "broken"
 
-	fieldManager                                 = "vald-agent-index-controller"
 	uncommittedAnnotationsKey                    = "vald.vdaas.org/uncommitted"
 	unsavedProcessedVqAnnotationsKey             = "vald.vdaas.org/unsaved-processed-vq"
 	unsavedCreateIndexExecutionNumAnnotationsKey = "vald.vdaas.org/unsaved-create-index-execution"
 	lastTimeSaveIndexTimestampAnnotationsKey     = "vald.vdaas.org/last-time-save-index-timestamp"
 	indexCountAnnotationsKey                     = "vald.vdaas.org/index-count"
+
+	// use this only for tests. usually just leave the ctx value empty and let time.Now() be used
+	saveIndexTimeKey contextSaveIndexTimeKey = "saveIndexTimeKey"
 )
 
 func New(cfg *config.NGT, opts ...Option) (nn NGT, err error) {
@@ -233,14 +237,6 @@ func New(cfg *config.NGT, opts ...Option) (nn NGT, err error) {
 	n.indexing.Store(false)
 	n.saving.Store(false)
 
-	if n.enableExportIndexInfo {
-		patcher, err := client.NewPatcher(fieldManager)
-		if err != nil {
-			return nil, fmt.Errorf("failed to create pacher: %w", err)
-		}
-		n.patcher = patcher
-	}
-
 	return n, nil
 }
 
@@ -1864,9 +1860,8 @@ func (n *ngt) unsavedNumberOfCreateIndexExecutionEntry() (k, v string) {
 	return unsavedCreateIndexExecutionNumAnnotationsKey, strconv.FormatUint(num, 10)
 }
 
-func (n *ngt) lastTimeSaveIndexTimestampEntry() (k, v string) {
-	timestamp := time.Now().UTC().Format(time.RFC3339)
-	return lastTimeSaveIndexTimestampAnnotationsKey, timestamp
+func (n *ngt) lastTimeSaveIndexTimestampEntry(timestamp time.Time) (k, v string) {
+	return lastTimeSaveIndexTimestampAnnotationsKey, timestamp.UTC().Format(time.RFC3339)
 }
 
 func (n *ngt) indexCountEntry() (k, v string) {
@@ -1904,7 +1899,13 @@ func (n *ngt) exportMetricsOnCreateIndex(ctx context.Context) error {
 func (n *ngt) exportMetricsOnSaveIndex(ctx context.Context) error {
 	entries := make(map[string]string)
 
-	k, v := n.lastTimeSaveIndexTimestampEntry()
+	val := ctx.Value(saveIndexTimeKey)
+	t, ok := val.(time.Time)
+	if !ok {
+		t = time.Now()
+	}
+
+	k, v := n.lastTimeSaveIndexTimestampEntry(t)
 	entries[k] = v
 
 	k, v = n.unsavedNumberOfCreateIndexExecutionEntry()

pkg/agent/core/ngt/service/ngt_test.go

@@ -44,6 +44,8 @@ import (
 	testdata "github.com/vdaas/vald/internal/test"
 	"github.com/vdaas/vald/internal/test/data/vector"
 	"github.com/vdaas/vald/internal/test/goleak"
+	"github.com/vdaas/vald/internal/test/mock/k8s"
+	"github.com/vdaas/vald/internal/test/testify"
 	"github.com/vdaas/vald/pkg/agent/internal/kvs"
 	"github.com/vdaas/vald/pkg/agent/internal/metadata"
 	"github.com/vdaas/vald/pkg/agent/internal/vqueue"
@@ -1126,6 +1128,241 @@ func Test_ngt_Close(t *testing.T) {
 	}
 }
 
+func TestExportIndexInfo(t *testing.T) {
+	t.Parallel()
+	config := defaultConfig
+	config.Dimension = 3
+	config.EnableExportIndexInfoToK8s = true
+	config.PodName = "test-pod"
+
+	type test struct {
+		name     string
+		testfunc func(t *testing.T)
+	}
+
+	tests := []test{
+		{
+			"export after create index one vector",
+			func(t *testing.T) {
+				mock := &k8s.PatcherMock{}
+				mock.On("ApplyPodAnnotations",
+					testify.Anything,
+					testify.Anything,
+					testify.Anything,
+					testify.Anything,
+				).Return(nil)
+
+				ngt, err := New(&config, WithPatcher(mock))
+				require.NoError(t, err)
+
+				now := time.Now().UnixNano()
+				err = ngt.InsertWithTime("test-uuid", []float32{1.0, 2.0, 3.0}, now)
+				require.NoError(t, err)
+
+				err = ngt.CreateIndex(context.Background(), 10)
+				require.NoError(t, err)
+
+				// expected entries
+				expected := map[string]string{
+					indexCountAnnotationsKey:                     "1",
+					uncommittedAnnotationsKey:                    "0",
+					unsavedCreateIndexExecutionNumAnnotationsKey: "1",
+					unsavedProcessedVqAnnotationsKey:             "1",
+				}
+				// check mock called result
+				mock.AssertExpectations(t)
+				mock.AssertNumberOfCalls(t, "ApplyPodAnnotations", 1)
+				mock.AssertCalled(t, "ApplyPodAnnotations", testify.Anything, config.PodName, config.PodNamespace, expected)
+			},
+		},
+		{
+			"export after create index multiple vectors",
+			func(t *testing.T) {
+				mock := &k8s.PatcherMock{}
+				mock.On("ApplyPodAnnotations",
+					testify.Anything,
+					testify.Anything,
+					testify.Anything,
+					testify.Anything,
+				).Return(nil)
+
+				ngt, err := New(&config, WithPatcher(mock))
+				require.NoError(t, err)
+
+				time1 := time.Now().UnixNano()
+				err = ngt.InsertWithTime("test-uuid", []float32{1.0, 2.0, 3.0}, time1)
+				require.NoError(t, err)
+
+				time2 := time.Now().UnixNano()
+				err = ngt.InsertWithTime("test-uuid2", []float32{1.0, 2.0, 3.0}, time2)
+				require.NoError(t, err)
+
+				err = ngt.CreateIndex(context.Background(), 10)
+				require.NoError(t, err)
+
+				// expected entries
+				expected := map[string]string{
+					indexCountAnnotationsKey:                     "2",
+					uncommittedAnnotationsKey:                    "0",
+					unsavedCreateIndexExecutionNumAnnotationsKey: "1",
+					unsavedProcessedVqAnnotationsKey:             "2",
+				}
+				// check mock called result
+				mock.AssertExpectations(t)
+				mock.AssertNumberOfCalls(t, "ApplyPodAnnotations", 1)
+				mock.AssertCalled(t, "ApplyPodAnnotations", testify.Anything, config.PodName, config.PodNamespace, expected)
+			},
+		},
+		{
+			"export after create index multiple times",
+			func(t *testing.T) {
+				mock := &k8s.PatcherMock{}
+				mock.On("ApplyPodAnnotations",
+					testify.Anything,
+					testify.Anything,
+					testify.Anything,
+					testify.Anything,
+				).Return(nil)
+
+				ngt, err := New(&config, WithPatcher(mock))
+				require.NoError(t, err)
+
+				time1 := time.Now().UnixNano()
+				err = ngt.InsertWithTime("test-uuid", []float32{1.0, 2.0, 3.0}, time1)
+				require.NoError(t, err)
+
+				err = ngt.CreateIndex(context.Background(), 10)
+				require.NoError(t, err)
+
+				time2 := time.Now().UnixNano()
+				err = ngt.InsertWithTime("test-uuid2", []float32{1.0, 2.0, 3.0}, time2)
+				require.NoError(t, err)
+
+				err = ngt.CreateIndex(context.Background(), 10)
+				require.NoError(t, err)
+
+				// expected entries
+				expected := map[string]string{
+					indexCountAnnotationsKey:                     "2",
+					uncommittedAnnotationsKey:                    "0",
+					unsavedCreateIndexExecutionNumAnnotationsKey: "2",
+					unsavedProcessedVqAnnotationsKey:             "2",
+				}
+				// check mock called result
+				mock.AssertExpectations(t)
+				mock.AssertNumberOfCalls(t, "ApplyPodAnnotations", 2)
+				mock.AssertCalled(t, "ApplyPodAnnotations", testify.Anything, config.PodName, config.PodNamespace, expected)
+			},
+		},
+		{
+			"export after create index multiple vectors and save index",
+			func(t *testing.T) {
+				mock := &k8s.PatcherMock{}
+				mock.On("ApplyPodAnnotations",
+					testify.Anything,
+					testify.Anything,
+					testify.Anything,
+					testify.Anything,
+				).Return(nil)
+
+				tmpdir := t.TempDir()
+
+				ngt, err := New(&config,
+					WithIndexPath(tmpdir),
+					WithPatcher(mock),
+				)
+				require.NoError(t, err)
+
+				time1 := time.Now().UnixNano()
+				err = ngt.InsertWithTime("test-uuid", []float32{1.0, 2.0, 3.0}, time1)
+				require.NoError(t, err)
+
+				time2 := time.Now().UnixNano()
+				err = ngt.InsertWithTime("test-uuid2", []float32{1.0, 2.0, 3.0}, time2)
+				require.NoError(t, err)
+
+				ctx := context.Background()
+				err = ngt.CreateIndex(ctx, 10)
+				require.NoError(t, err)
+
+				// set time in context for testing
+				saveIndexTime := time.Now()
+				ctx = context.WithValue(ctx, saveIndexTimeKey, saveIndexTime)
+
+				err = ngt.SaveIndex(ctx)
+				require.NoError(t, err)
+
+				// expected entries
+				expectedAfterCreate := map[string]string{
+					indexCountAnnotationsKey:                     "2",
+					uncommittedAnnotationsKey:                    "0",
+					unsavedCreateIndexExecutionNumAnnotationsKey: "1",
+					unsavedProcessedVqAnnotationsKey:             "2",
+				}
+				expectedAfterSave := map[string]string{
+					lastTimeSaveIndexTimestampAnnotationsKey:     saveIndexTime.UTC().Format(time.RFC3339),
+					unsavedCreateIndexExecutionNumAnnotationsKey: "0",
+					unsavedProcessedVqAnnotationsKey:             "0",
+				}
+				// check mock called result
+				mock.AssertExpectations(t)
+				mock.AssertNumberOfCalls(t, "ApplyPodAnnotations", 2)
+				mock.AssertCalled(t, "ApplyPodAnnotations", testify.Anything, config.PodName, config.PodNamespace, expectedAfterCreate)
+				mock.AssertCalled(t, "ApplyPodAnnotations", testify.Anything, config.PodName, config.PodNamespace, expectedAfterSave)
+			},
+		},
+		{
+			"export after inserting vectors",
+			func(t *testing.T) {
+				mock := &k8s.PatcherMock{}
+				mock.On("ApplyPodAnnotations",
+					testify.Anything,
+					testify.Anything,
+					testify.Anything,
+					testify.Anything,
+				).Return(nil)
+
+				tmpdir := t.TempDir()
+
+				n, err := New(&config,
+					WithIndexPath(tmpdir),
+					WithPatcher(mock),
+				)
+				require.NoError(t, err)
+
+				time1 := time.Now().UnixNano()
+				err = n.InsertWithTime("test-uuid", []float32{1.0, 2.0, 3.0}, time1)
+				require.NoError(t, err)
+
+				time2 := time.Now().UnixNano()
+				err = n.InsertWithTime("test-uuid2", []float32{1.0, 2.0, 3.0}, time2)
+				require.NoError(t, err)
+
+				ctx := context.Background()
+				ExportMetricsOnTick(n.(*ngt), ctx)
+
+				// expected entries
+				expectedAfterInsert := map[string]string{
+					indexCountAnnotationsKey:  "0",
+					uncommittedAnnotationsKey: "2",
+				}
+				// check mock called result
+				mock.AssertExpectations(t)
+				mock.AssertNumberOfCalls(t, "ApplyPodAnnotations", 1)
+				mock.AssertCalled(t, "ApplyPodAnnotations", testify.Anything, config.PodName, config.PodNamespace, expectedAfterInsert)
+			},
+		},
+	}
+	for _, tc := range tests {
+		test := tc
+		t.Run(test.name, func(tt *testing.T) {
+			tt.Parallel()
+			defer goleak.VerifyNone(tt, goleak.IgnoreCurrent())
+			test.testfunc(tt)
+		})
+	}
+}
+
 func Test_ngt_InsertUpsert(t *testing.T) {
 	if testing.Short() {
 		t.Skip("The execution of this test takes a lot of time, so it is not performed during the short test\ttest: Test_ngt_InsertUpsert")