387 lines
10 KiB
Go
387 lines
10 KiB
Go
package hcp
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import (
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"context"
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"fmt"
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"net/url"
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"regexp"
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"strings"
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"sync"
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"testing"
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"time"
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"github.com/armon/go-metrics"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/mock"
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"github.com/stretchr/testify/require"
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"github.com/hashicorp/consul/agent/hcp/client"
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)
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const (
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testRefreshInterval = 100 * time.Millisecond
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testSinkServiceName = "test.telemetry_config_provider"
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testRaceWriteSampleCount = 100
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testRaceReadSampleCount = 5000
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)
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var (
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// Test constants to verify inmem sink metrics.
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testMetricKeyFailure = testSinkServiceName + "." + strings.Join(internalMetricRefreshFailure, ".")
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testMetricKeySuccess = testSinkServiceName + "." + strings.Join(internalMetricRefreshSuccess, ".")
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)
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type testConfig struct {
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filters string
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endpoint string
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labels map[string]string
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refreshInterval time.Duration
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}
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func TestNewTelemetryConfigProvider(t *testing.T) {
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t.Parallel()
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for name, tc := range map[string]struct {
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testInputs *testConfig
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wantErr string
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}{
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"success": {
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testInputs: &testConfig{
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refreshInterval: 1 * time.Second,
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},
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},
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"failsWithInvalidRefreshInterval": {
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testInputs: &testConfig{
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refreshInterval: 0 * time.Second,
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},
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wantErr: "invalid refresh interval",
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},
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} {
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tc := tc
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t.Run(name, func(t *testing.T) {
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t.Parallel()
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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testCfg, err := testTelemetryCfg(tc.testInputs)
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require.NoError(t, err)
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cfgProvider, err := NewHCPProvider(ctx, client.NewMockClient(t), testCfg)
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if tc.wantErr != "" {
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require.Error(t, err)
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require.Contains(t, err.Error(), tc.wantErr)
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require.Nil(t, cfgProvider)
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return
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}
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require.NotNil(t, cfgProvider)
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})
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}
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}
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func TestTelemetryConfigProviderGetUpdate(t *testing.T) {
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for name, tc := range map[string]struct {
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mockExpect func(*client.MockClient)
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metricKey string
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optsInputs *testConfig
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expected *testConfig
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}{
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"noChanges": {
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optsInputs: &testConfig{
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endpoint: "http://test.com/v1/metrics",
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filters: "test",
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labels: map[string]string{
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"test_label": "123",
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},
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refreshInterval: testRefreshInterval,
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},
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mockExpect: func(m *client.MockClient) {
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mockCfg, _ := testTelemetryCfg(&testConfig{
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endpoint: "http://test.com/v1/metrics",
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filters: "test",
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labels: map[string]string{
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"test_label": "123",
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},
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refreshInterval: testRefreshInterval,
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})
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m.EXPECT().FetchTelemetryConfig(mock.Anything).Return(mockCfg, nil)
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},
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expected: &testConfig{
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endpoint: "http://test.com/v1/metrics",
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labels: map[string]string{
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"test_label": "123",
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},
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filters: "test",
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refreshInterval: testRefreshInterval,
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},
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metricKey: testMetricKeySuccess,
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},
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"newConfig": {
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optsInputs: &testConfig{
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endpoint: "http://test.com/v1/metrics",
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filters: "test",
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labels: map[string]string{
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"test_label": "123",
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},
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refreshInterval: 2 * time.Second,
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},
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mockExpect: func(m *client.MockClient) {
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mockCfg, _ := testTelemetryCfg(&testConfig{
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endpoint: "http://newendpoint/v1/metrics",
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filters: "consul",
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labels: map[string]string{
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"new_label": "1234",
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},
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refreshInterval: 2 * time.Second,
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})
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m.EXPECT().FetchTelemetryConfig(mock.Anything).Return(mockCfg, nil)
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},
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expected: &testConfig{
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endpoint: "http://newendpoint/v1/metrics",
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filters: "consul",
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labels: map[string]string{
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"new_label": "1234",
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},
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refreshInterval: 2 * time.Second,
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},
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metricKey: testMetricKeySuccess,
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},
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"sameConfigInvalidRefreshInterval": {
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optsInputs: &testConfig{
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endpoint: "http://test.com/v1/metrics",
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filters: "test",
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labels: map[string]string{
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"test_label": "123",
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},
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refreshInterval: testRefreshInterval,
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},
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mockExpect: func(m *client.MockClient) {
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mockCfg, _ := testTelemetryCfg(&testConfig{
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refreshInterval: 0 * time.Second,
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})
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m.EXPECT().FetchTelemetryConfig(mock.Anything).Return(mockCfg, nil)
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},
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expected: &testConfig{
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endpoint: "http://test.com/v1/metrics",
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labels: map[string]string{
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"test_label": "123",
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},
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filters: "test",
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refreshInterval: testRefreshInterval,
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},
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metricKey: testMetricKeyFailure,
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},
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"sameConfigHCPClientFailure": {
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optsInputs: &testConfig{
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endpoint: "http://test.com/v1/metrics",
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filters: "test",
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labels: map[string]string{
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"test_label": "123",
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},
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refreshInterval: testRefreshInterval,
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},
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mockExpect: func(m *client.MockClient) {
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m.EXPECT().FetchTelemetryConfig(mock.Anything).Return(nil, fmt.Errorf("failure"))
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},
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expected: &testConfig{
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endpoint: "http://test.com/v1/metrics",
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filters: "test",
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labels: map[string]string{
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"test_label": "123",
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},
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refreshInterval: testRefreshInterval,
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},
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metricKey: testMetricKeyFailure,
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},
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} {
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t.Run(name, func(t *testing.T) {
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sink := initGlobalSink()
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mockClient := client.NewMockClient(t)
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tc.mockExpect(mockClient)
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dynamicCfg, err := testDynamicCfg(tc.optsInputs)
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require.NoError(t, err)
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provider := &hcpProviderImpl{
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hcpClient: mockClient,
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cfg: dynamicCfg,
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}
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provider.getUpdate(context.Background())
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// Verify endpoint provider returns correct config values.
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require.Equal(t, tc.expected.endpoint, provider.GetEndpoint().String())
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require.Equal(t, tc.expected.filters, provider.GetFilters().String())
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require.Equal(t, tc.expected.labels, provider.GetLabels())
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// Verify count for transform success metric.
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interval := sink.Data()[0]
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require.NotNil(t, interval, 1)
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sv := interval.Counters[tc.metricKey]
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assert.NotNil(t, sv.AggregateSample)
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require.Equal(t, sv.AggregateSample.Count, 1)
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})
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}
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}
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// mockRaceClient is a mock HCP client that fetches TelemetryConfig.
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// The mock TelemetryConfig returned can be manually updated at any time.
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// It manages concurrent read/write access to config with a sync.RWMutex.
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type mockRaceClient struct {
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client.Client
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cfg *client.TelemetryConfig
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rw sync.RWMutex
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}
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// updateCfg acquires a write lock and updates client config to a new value givent a count.
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func (m *mockRaceClient) updateCfg(count int) (*client.TelemetryConfig, error) {
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m.rw.Lock()
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defer m.rw.Unlock()
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labels := map[string]string{fmt.Sprintf("label_%d", count): fmt.Sprintf("value_%d", count)}
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filters, err := regexp.Compile(fmt.Sprintf("consul_filter_%d", count))
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if err != nil {
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return nil, err
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}
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endpoint, err := url.Parse(fmt.Sprintf("http://consul-endpoint-%d.com", count))
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if err != nil {
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return nil, err
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}
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cfg := &client.TelemetryConfig{
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MetricsConfig: &client.MetricsConfig{
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Filters: filters,
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Endpoint: endpoint,
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Labels: labels,
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},
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RefreshConfig: &client.RefreshConfig{
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RefreshInterval: testRefreshInterval,
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},
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}
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m.cfg = cfg
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return cfg, nil
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}
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// FetchTelemetryConfig returns the current config held by the mockRaceClient.
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func (m *mockRaceClient) FetchTelemetryConfig(ctx context.Context) (*client.TelemetryConfig, error) {
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m.rw.RLock()
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defer m.rw.RUnlock()
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return m.cfg, nil
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}
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func TestTelemetryConfigProvider_Race(t *testing.T) {
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//todo(achooo): address flaky test
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t.Skip("TODO(flaky): This test fails often in the CI")
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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initCfg, err := testTelemetryCfg(&testConfig{
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endpoint: "test.com",
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filters: "test",
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labels: map[string]string{"test_label": "test_value"},
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refreshInterval: testRefreshInterval,
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})
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require.NoError(t, err)
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m := &mockRaceClient{
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cfg: initCfg,
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}
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// Start the provider goroutine, which fetches client TelemetryConfig every RefreshInterval.
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provider, err := NewHCPProvider(ctx, m, m.cfg)
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require.NoError(t, err)
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for count := 0; count < testRaceWriteSampleCount; count++ {
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// Force a TelemetryConfig value change in the mockRaceClient.
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newCfg, err := m.updateCfg(count)
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require.NoError(t, err)
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// Force provider to obtain new client TelemetryConfig immediately.
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// This call is necessary to guarantee TelemetryConfig changes to assert on expected values below.
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provider.getUpdate(context.Background())
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// Start goroutines to access label configuration.
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wg := &sync.WaitGroup{}
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kickOff(wg, testRaceReadSampleCount, provider, func(provider *hcpProviderImpl) {
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require.Equal(t, provider.GetLabels(), newCfg.MetricsConfig.Labels)
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})
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// Start goroutines to access endpoint configuration.
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kickOff(wg, testRaceReadSampleCount, provider, func(provider *hcpProviderImpl) {
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require.Equal(t, provider.GetFilters(), newCfg.MetricsConfig.Filters)
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})
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// Start goroutines to access filter configuration.
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kickOff(wg, testRaceReadSampleCount, provider, func(provider *hcpProviderImpl) {
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require.Equal(t, provider.GetEndpoint(), newCfg.MetricsConfig.Endpoint)
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})
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wg.Wait()
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}
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}
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func kickOff(wg *sync.WaitGroup, count int, provider *hcpProviderImpl, check func(cfgProvider *hcpProviderImpl)) {
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for i := 0; i < count; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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check(provider)
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}()
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}
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}
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// initGlobalSink is a helper function to initialize a Go metrics inmemsink.
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func initGlobalSink() *metrics.InmemSink {
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cfg := metrics.DefaultConfig(testSinkServiceName)
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cfg.EnableHostname = false
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sink := metrics.NewInmemSink(10*time.Second, 10*time.Second)
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metrics.NewGlobal(cfg, sink)
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return sink
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}
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// testDynamicCfg converts testConfig inputs to a dynamicConfig to be used in tests.
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func testDynamicCfg(testCfg *testConfig) (*dynamicConfig, error) {
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filters, err := regexp.Compile(testCfg.filters)
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if err != nil {
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return nil, err
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}
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endpoint, err := url.Parse(testCfg.endpoint)
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if err != nil {
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return nil, err
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}
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return &dynamicConfig{
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Endpoint: endpoint,
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Filters: filters,
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Labels: testCfg.labels,
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RefreshInterval: testCfg.refreshInterval,
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}, nil
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}
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// testTelemetryCfg converts testConfig inputs to a TelemetryConfig to be used in tests.
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func testTelemetryCfg(testCfg *testConfig) (*client.TelemetryConfig, error) {
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filters, err := regexp.Compile(testCfg.filters)
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if err != nil {
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return nil, err
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}
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endpoint, err := url.Parse(testCfg.endpoint)
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if err != nil {
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return nil, err
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}
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return &client.TelemetryConfig{
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MetricsConfig: &client.MetricsConfig{
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Endpoint: endpoint,
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Filters: filters,
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Labels: testCfg.labels,
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},
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RefreshConfig: &client.RefreshConfig{
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RefreshInterval: testCfg.refreshInterval,
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},
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}, nil
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}
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