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Pass limit param as hint to storage.Querier

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Signed-off-by: 🌲 Harry 🌊 John 🏔 <johrry@amazon.com>
This commit is contained in:
🌲 Harry 🌊 John 🏔 2024-05-15 11:39:54 -07:00
parent f9ca6c4ae6
commit d5f6887294
15 changed files with 103 additions and 54 deletions
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6
docs/querying/api.md
View file

@ -256,7 +256,7 @@ URL query parameters:
series to return. At least one `match[]` argument must be provided.
- `start=<rfc3339 | unix_timestamp>`: Start timestamp.
- `end=<rfc3339 | unix_timestamp>`: End timestamp.
- `limit=<number>`: Maximum number of returned series. Optional.
- `limit=<number>`: Maximum number of returned series. Optional. 0 means disabled.
You can URL-encode these parameters directly in the request body by using the `POST` method and
`Content-Type: application/x-www-form-urlencoded` header. This is useful when specifying a large
@ -307,7 +307,7 @@ URL query parameters:
- `end=<rfc3339 | unix_timestamp>`: End timestamp. Optional.
- `match[]=<series_selector>`: Repeated series selector argument that selects the
series from which to read the label names. Optional.
- `limit=<number>`: Maximum number of returned series. Optional.
- `limit=<number>`: Maximum number of returned series. Optional. 0 means disabled.
The `data` section of the JSON response is a list of string label names.
@ -358,7 +358,7 @@ URL query parameters:
- `end=<rfc3339 | unix_timestamp>`: End timestamp. Optional.
- `match[]=<series_selector>`: Repeated series selector argument that selects the
series from which to read the label values. Optional.
- `limit=<number>`: Maximum number of returned series. Optional.
- `limit=<number>`: Maximum number of returned series. Optional. 0 means disabled.
The `data` section of the JSON response is a list of string label values.

4
promql/engine_test.go
View file

@ -236,11 +236,11 @@ func (q *errQuerier) Select(context.Context, bool, *storage.SelectHints, ...*lab
return errSeriesSet{err: q.err}
}
func (*errQuerier) LabelValues(context.Context, string, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (*errQuerier) LabelValues(context.Context, string, *storage.LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
return nil, nil, nil
}
func (*errQuerier) LabelNames(context.Context, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (*errQuerier) LabelNames(context.Context, *storage.LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
return nil, nil, nil
}
func (*errQuerier) Close() error { return nil }

4
storage/fanout_test.go
View file

@ -236,11 +236,11 @@ func (errQuerier) Select(context.Context, bool, *storage.SelectHints, ...*labels
return storage.ErrSeriesSet(errSelect)
}
func (errQuerier) LabelValues(context.Context, string, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (errQuerier) LabelValues(context.Context, string, *storage.LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
return nil, nil, errors.New("label values error")
}
func (errQuerier) LabelNames(context.Context, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (errQuerier) LabelNames(context.Context, *storage.LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
return nil, nil, errors.New("label names error")
}

18
storage/interface.go
View file

@ -122,11 +122,11 @@ type MockQuerier struct {
SelectMockFunction func(sortSeries bool, hints *SelectHints, matchers ...*labels.Matcher) SeriesSet
}
func (q *MockQuerier) LabelValues(context.Context, string, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (q *MockQuerier) LabelValues(context.Context, string, *LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
return nil, nil, nil
}
func (q *MockQuerier) LabelNames(context.Context, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (q *MockQuerier) LabelNames(context.Context, *LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
return nil, nil, nil
}
@ -161,12 +161,12 @@ type LabelQuerier interface {
// It is not safe to use the strings beyond the lifetime of the querier.
// If matchers are specified the returned result set is reduced
// to label values of metrics matching the matchers.
LabelValues(ctx context.Context, name string, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error)
LabelValues(ctx context.Context, name string, hints *LabelHints, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error)
// LabelNames returns all the unique label names present in the block in sorted order.
// If matchers are specified the returned result set is reduced
// to label names of metrics matching the matchers.
LabelNames(ctx context.Context, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error)
LabelNames(ctx context.Context, hints *LabelHints, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error)
// Close releases the resources of the Querier.
Close() error
@ -190,6 +190,9 @@ type SelectHints struct {
Start int64 // Start time in milliseconds for this select.
End int64 // End time in milliseconds for this select.
// Maximum number of results returned. Use a value of 0 to disable.
Limit int
Step int64 // Query step size in milliseconds.
Func string // String representation of surrounding function or aggregation.
@ -217,6 +220,13 @@ type SelectHints struct {
DisableTrimming bool
}
// LabelHints specifies hints passed for label reads.
// This is used only as an option for implementation to use.
type LabelHints struct {
// Maximum number of results returned. Use a value of 0 to disable.
Limit int
}
// TODO(bwplotka): Move to promql/engine_test.go?
// QueryableFunc is an adapter to allow the use of ordinary functions as
// Queryables. It follows the idea of http.HandlerFunc.

16
storage/merge.go
View file

@ -161,8 +161,8 @@ func (l labelGenericQueriers) SplitByHalf() (labelGenericQueriers, labelGenericQ
// LabelValues returns all potential values for a label name.
// If matchers are specified the returned result set is reduced
// to label values of metrics matching the matchers.
func (q *mergeGenericQuerier) LabelValues(ctx context.Context, name string, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
res, ws, err := q.lvals(ctx, q.queriers, name, matchers...)
func (q *mergeGenericQuerier) LabelValues(ctx context.Context, name string, hints *LabelHints, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
res, ws, err := q.lvals(ctx, q.queriers, name, hints, matchers...)
if err != nil {
return nil, nil, fmt.Errorf("LabelValues() from merge generic querier for label %s: %w", name, err)
}
@ -170,22 +170,22 @@ func (q *mergeGenericQuerier) LabelValues(ctx context.Context, name string, matc
}
// lvals performs merge sort for LabelValues from multiple queriers.
func (q *mergeGenericQuerier) lvals(ctx context.Context, lq labelGenericQueriers, n string, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (q *mergeGenericQuerier) lvals(ctx context.Context, lq labelGenericQueriers, n string, hints *LabelHints, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
if lq.Len() == 0 {
return nil, nil, nil
}
if lq.Len() == 1 {
return lq.Get(0).LabelValues(ctx, n, matchers...)
return lq.Get(0).LabelValues(ctx, n, hints, matchers...)
}
a, b := lq.SplitByHalf()
var ws annotations.Annotations
s1, w, err := q.lvals(ctx, a, n, matchers...)
s1, w, err := q.lvals(ctx, a, n, hints, matchers...)
ws.Merge(w)
if err != nil {
return nil, ws, err
}
s2, ws, err := q.lvals(ctx, b, n, matchers...)
s2, ws, err := q.lvals(ctx, b, n, hints, matchers...)
ws.Merge(w)
if err != nil {
return nil, ws, err
@ -221,13 +221,13 @@ func mergeStrings(a, b []string) []string {
}
// LabelNames returns all the unique label names present in all queriers in sorted order.
func (q *mergeGenericQuerier) LabelNames(ctx context.Context, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (q *mergeGenericQuerier) LabelNames(ctx context.Context, hints *LabelHints, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
var (
labelNamesMap = make(map[string]struct{})
warnings annotations.Annotations
)
for _, querier := range q.queriers {
names, wrn, err := querier.LabelNames(ctx, matchers...)
names, wrn, err := querier.LabelNames(ctx, hints, matchers...)
if wrn != nil {
// TODO(bwplotka): We could potentially wrap warnings.
warnings.Merge(wrn)

10
storage/merge_test.go
View file

@ -1361,7 +1361,7 @@ func (m *mockGenericQuerier) Select(_ context.Context, b bool, _ *SelectHints, _
return &mockGenericSeriesSet{resp: m.resp, warnings: m.warnings, err: m.err}
}
func (m *mockGenericQuerier) LabelValues(_ context.Context, name string, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (m *mockGenericQuerier) LabelValues(_ context.Context, name string, hints *LabelHints, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
m.mtx.Lock()
m.labelNamesRequested = append(m.labelNamesRequested, labelNameRequest{
name: name,
@ -1371,7 +1371,7 @@ func (m *mockGenericQuerier) LabelValues(_ context.Context, name string, matcher
return m.resp, m.warnings, m.err
}
func (m *mockGenericQuerier) LabelNames(context.Context, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (m *mockGenericQuerier) LabelNames(context.Context, *LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
m.mtx.Lock()
m.labelNamesCalls++
m.mtx.Unlock()
@ -1560,7 +1560,7 @@ func TestMergeGenericQuerierWithSecondaries_ErrorHandling(t *testing.T) {
}
})
t.Run("LabelNames", func(t *testing.T) {
res, w, err := q.LabelNames(ctx)
res, w, err := q.LabelNames(ctx, nil)
require.Subset(t, tcase.expectedWarnings, w)
require.ErrorIs(t, err, tcase.expectedErrs[1], "expected error doesn't match")
require.Equal(t, tcase.expectedLabels, res)
@ -1575,7 +1575,7 @@ func TestMergeGenericQuerierWithSecondaries_ErrorHandling(t *testing.T) {
}
})
t.Run("LabelValues", func(t *testing.T) {
res, w, err := q.LabelValues(ctx, "test")
res, w, err := q.LabelValues(ctx, "test", nil)
require.Subset(t, tcase.expectedWarnings, w)
require.ErrorIs(t, err, tcase.expectedErrs[2], "expected error doesn't match")
require.Equal(t, tcase.expectedLabels, res)
@ -1591,7 +1591,7 @@ func TestMergeGenericQuerierWithSecondaries_ErrorHandling(t *testing.T) {
})
t.Run("LabelValuesWithMatchers", func(t *testing.T) {
matcher := labels.MustNewMatcher(labels.MatchEqual, "otherLabel", "someValue")
res, w, err := q.LabelValues(ctx, "test2", matcher)
res, w, err := q.LabelValues(ctx, "test2", nil, matcher)
require.Subset(t, tcase.expectedWarnings, w)
require.ErrorIs(t, err, tcase.expectedErrs[3], "expected error doesn't match")
require.Equal(t, tcase.expectedLabels, res)

8
storage/noop.go
View file

@ -31,11 +31,11 @@ func (noopQuerier) Select(context.Context, bool, *SelectHints, ...*labels.Matche
return NoopSeriesSet()
}
func (noopQuerier) LabelValues(context.Context, string, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (noopQuerier) LabelValues(context.Context, string, *LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
return nil, nil, nil
}
func (noopQuerier) LabelNames(context.Context, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (noopQuerier) LabelNames(context.Context, *LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
return nil, nil, nil
}
@ -54,11 +54,11 @@ func (noopChunkQuerier) Select(context.Context, bool, *SelectHints, ...*labels.M
return NoopChunkedSeriesSet()
}
func (noopChunkQuerier) LabelValues(context.Context, string, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (noopChunkQuerier) LabelValues(context.Context, string, *LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
return nil, nil, nil
}
func (noopChunkQuerier) LabelNames(context.Context, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (noopChunkQuerier) LabelNames(context.Context, *LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
return nil, nil, nil
}

4
storage/remote/read.go
View file

@ -210,13 +210,13 @@ func (q querier) addExternalLabels(ms []*labels.Matcher) ([]*labels.Matcher, []s
}
// LabelValues implements storage.Querier and is a noop.
func (q *querier) LabelValues(context.Context, string, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (q *querier) LabelValues(context.Context, string, *storage.LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
// TODO: Implement: https://github.com/prometheus/prometheus/issues/3351
return nil, nil, errors.New("not implemented")
}
// LabelNames implements storage.Querier and is a noop.
func (q *querier) LabelNames(context.Context, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (q *querier) LabelNames(context.Context, *storage.LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
// TODO: Implement: https://github.com/prometheus/prometheus/issues/3351
return nil, nil, errors.New("not implemented")
}

8
storage/secondary.go
View file

@ -49,16 +49,16 @@ func newSecondaryQuerierFromChunk(cq ChunkQuerier) genericQuerier {
return &secondaryQuerier{genericQuerier: newGenericQuerierFromChunk(cq)}
}
func (s *secondaryQuerier) LabelValues(ctx context.Context, name string, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
vals, w, err := s.genericQuerier.LabelValues(ctx, name, matchers...)
func (s *secondaryQuerier) LabelValues(ctx context.Context, name string, hints *LabelHints, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
vals, w, err := s.genericQuerier.LabelValues(ctx, name, hints, matchers...)
if err != nil {
return nil, w.Add(err), nil
}
return vals, w, nil
}
func (s *secondaryQuerier) LabelNames(ctx context.Context, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
names, w, err := s.genericQuerier.LabelNames(ctx, matchers...)
func (s *secondaryQuerier) LabelNames(ctx context.Context, hints *LabelHints, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
names, w, err := s.genericQuerier.LabelNames(ctx, hints, matchers...)
if err != nil {
return nil, w.Add(err), nil
}

6
tsdb/db_test.go
View file

@ -1001,7 +1001,7 @@ func TestWALFlushedOnDBClose(t *testing.T) {
q, err := db.Querier(0, 1)
require.NoError(t, err)
values, ws, err := q.LabelValues(ctx, "labelname")
values, ws, err := q.LabelValues(ctx, "labelname", nil)
require.NoError(t, err)
require.Empty(t, ws)
require.Equal(t, []string{"labelvalue"}, values)
@ -1976,7 +1976,7 @@ func TestQuerierWithBoundaryChunks(t *testing.T) {
defer q.Close()
// The requested interval covers 2 blocks, so the querier's label values for blockID should give us 2 values, one from each block.
b, ws, err := q.LabelValues(ctx, "blockID")
b, ws, err := q.LabelValues(ctx, "blockID", nil)
require.NoError(t, err)
var nilAnnotations annotations.Annotations
require.Equal(t, nilAnnotations, ws)
@ -2288,7 +2288,7 @@ func TestDB_LabelNames(t *testing.T) {
q, err := db.Querier(math.MinInt64, math.MaxInt64)
require.NoError(t, err)
var ws annotations.Annotations
labelNames, ws, err = q.LabelNames(ctx)
labelNames, ws, err = q.LabelNames(ctx, nil)
require.NoError(t, err)
require.Empty(t, ws)
require.NoError(t, q.Close())

4
tsdb/querier.go
View file

@ -77,12 +77,12 @@ func newBlockBaseQuerier(b BlockReader, mint, maxt int64) (*blockBaseQuerier, er
}, nil
}
func (q *blockBaseQuerier) LabelValues(ctx context.Context, name string, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (q *blockBaseQuerier) LabelValues(ctx context.Context, name string, hints *storage.LabelHints, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
res, err := q.index.SortedLabelValues(ctx, name, matchers...)
return res, nil, err
}
func (q *blockBaseQuerier) LabelNames(ctx context.Context, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (q *blockBaseQuerier) LabelNames(ctx context.Context, hints *storage.LabelHints, matchers ...*labels.Matcher) ([]string, annotations.Annotations, error) {
res, err := q.index.LabelNames(ctx, matchers...)
return res, nil, err
}

2
tsdb/querier_test.go
View file

@ -3022,7 +3022,7 @@ func TestQuerierIndexQueriesRace(t *testing.T) {
q, err := db.Querier(math.MinInt64, math.MaxInt64)
require.NoError(t, err)
values, _, err := q.LabelValues(ctx, "seq", c.matchers...)
values, _, err := q.LabelValues(ctx, "seq", nil, c.matchers...)
require.NoError(t, err)
require.Emptyf(t, values, `label values for label "seq" should be empty`)

39
web/api/v1/api.go
View file

@ -658,6 +658,10 @@ func (api *API) labelNames(r *http.Request) apiFuncResult {
return apiFuncResult{nil, &apiError{errorBadData, err}, nil, nil}
}
hints := &storage.LabelHints{
Limit: toHintLimit(limit),
}
q, err := api.Queryable.Querier(timestamp.FromTime(start), timestamp.FromTime(end))
if err != nil {
return apiFuncResult{nil, returnAPIError(err), nil, nil}
@ -672,7 +676,7 @@ func (api *API) labelNames(r *http.Request) apiFuncResult {
labelNamesSet := make(map[string]struct{})
for _, matchers := range matcherSets {
vals, callWarnings, err := q.LabelNames(r.Context(), matchers...)
vals, callWarnings, err := q.LabelNames(r.Context(), hints, matchers...)
if err != nil {
return apiFuncResult{nil, returnAPIError(err), warnings, nil}
}
@ -694,7 +698,7 @@ func (api *API) labelNames(r *http.Request) apiFuncResult {
if len(matcherSets) == 1 {
matchers = matcherSets[0]
}
names, warnings, err = q.LabelNames(r.Context(), matchers...)
names, warnings, err = q.LabelNames(r.Context(), hints, matchers...)
if err != nil {
return apiFuncResult{nil, &apiError{errorExec, err}, warnings, nil}
}
@ -704,7 +708,7 @@ func (api *API) labelNames(r *http.Request) apiFuncResult {
names = []string{}
}
if len(names) > limit {
if limit > 0 && len(names) > limit {
names = names[:limit]
warnings = warnings.Add(errors.New("results truncated due to limit"))
}
@ -738,6 +742,10 @@ func (api *API) labelValues(r *http.Request) (result apiFuncResult) {
return apiFuncResult{nil, &apiError{errorBadData, err}, nil, nil}
}
hints := &storage.LabelHints{
Limit: toHintLimit(limit),
}
q, err := api.Queryable.Querier(timestamp.FromTime(start), timestamp.FromTime(end))
if err != nil {
return apiFuncResult{nil, &apiError{errorExec, err}, nil, nil}
@ -762,7 +770,7 @@ func (api *API) labelValues(r *http.Request) (result apiFuncResult) {
var callWarnings annotations.Annotations
labelValuesSet := make(map[string]struct{})
for _, matchers := range matcherSets {
vals, callWarnings, err = q.LabelValues(ctx, name, matchers...)
vals, callWarnings, err = q.LabelValues(ctx, name, hints, matchers...)
if err != nil {
return apiFuncResult{nil, &apiError{errorExec, err}, warnings, closer}
}
@ -781,7 +789,7 @@ func (api *API) labelValues(r *http.Request) (result apiFuncResult) {
if len(matcherSets) == 1 {
matchers = matcherSets[0]
}
vals, warnings, err = q.LabelValues(ctx, name, matchers...)
vals, warnings, err = q.LabelValues(ctx, name, hints, matchers...)
if err != nil {
return apiFuncResult{nil, &apiError{errorExec, err}, warnings, closer}
}
@ -793,7 +801,7 @@ func (api *API) labelValues(r *http.Request) (result apiFuncResult) {
slices.Sort(vals)
if len(vals) > limit {
if limit > 0 && len(vals) > limit {
vals = vals[:limit]
warnings = warnings.Add(errors.New("results truncated due to limit"))
}
@ -863,6 +871,7 @@ func (api *API) series(r *http.Request) (result apiFuncResult) {
Start: timestamp.FromTime(start),
End: timestamp.FromTime(end),
Func: "series", // There is no series function, this token is used for lookups that don't need samples.
Limit: toHintLimit(limit),
}
var set storage.SeriesSet
@ -889,7 +898,7 @@ func (api *API) series(r *http.Request) (result apiFuncResult) {
}
metrics = append(metrics, set.At().Labels())
if len(metrics) > limit {
if limit > 0 && len(metrics) > limit {
metrics = metrics[:limit]
warnings.Add(errors.New("results truncated due to limit"))
return apiFuncResult{metrics, nil, warnings, closer}
@ -1898,8 +1907,8 @@ OUTER:
return matcherSets, nil
}
// parseLimitParam returning 0 means no limit is to be applied.
func parseLimitParam(limitStr string) (limit int, err error) {
limit = math.MaxInt
if limitStr == "" {
return limit, nil
}
@ -1908,9 +1917,19 @@ func parseLimitParam(limitStr string) (limit int, err error) {
if err != nil {
return limit, err
}
if limit <= 0 {
return limit, errors.New("limit must be positive")
if limit < 0 {
return limit, errors.New("limit must be non-negative")
}
return limit, nil
}
// toHintLimit increases the API limit, as returned by parseLimitParam, by 1.
// This allows for emitting warnings when the results are truncated.
func toHintLimit(limit int) int {
// 0 means no limit and avoid int overflow
if limit > 0 && limit < math.MaxInt {
return limit + 1
}
return limit
}

24
web/api/v1/api_test.go
View file

@ -739,13 +739,16 @@ func TestLabelNames(t *testing.T) {
api := &API{
Queryable: storage,
}
request := func(method string, matchers ...string) (*http.Request, error) {
request := func(method, limit string, matchers ...string) (*http.Request, error) {
u, err := url.Parse("http://example.com")
require.NoError(t, err)
q := u.Query()
for _, matcher := range matchers {
q.Add("match[]", matcher)
}
if limit != "" {
q.Add("limit", limit)
}
u.RawQuery = q.Encode()
r, err := http.NewRequest(method, u.String(), nil)
@ -759,6 +762,7 @@ func TestLabelNames(t *testing.T) {
name string
api *API
matchers []string
limit string
expected []string
expectedErrorType errorType
}{
@ -773,6 +777,13 @@ func TestLabelNames(t *testing.T) {
expected: []string{"__name__", "abc", "foo", "xyz"},
api: api,
},
{
name: "non empty label matcher with limit",
matchers: []string{`{foo=~".+"}`},
expected: []string{"__name__", "abc"},
limit: "2",
api: api,
},
{
name: "exact label matcher",
matchers: []string{`{foo="boo"}`},
@ -805,7 +816,7 @@ func TestLabelNames(t *testing.T) {
t.Run(tc.name, func(t *testing.T) {
for _, method := range []string{http.MethodGet, http.MethodPost} {
ctx := context.Background()
req, err := request(method, tc.matchers...)
req, err := request(method, tc.limit, tc.matchers...)
require.NoError(t, err)
res := tc.api.labelNames(req.WithContext(ctx))
assertAPIError(t, res.err, tc.expectedErrorType)
@ -1430,6 +1441,15 @@ func testEndpoints(t *testing.T, api *API, tr *testTargetRetriever, es storage.E
responseLen: 2, // API does not specify which particular value will come back.
warningsCount: 0, // No warnings if limit isn't exceeded.
},
{
endpoint: api.series,
query: url.Values{
"match[]": []string{"test_metric1"},
"limit": []string{"0"},
},
responseLen: 2, // API does not specify which particular value will come back.
warningsCount: 0, // No warnings if limit isn't exceeded.
},
// Missing match[] query params in series requests.
{
endpoint: api.series,

4
web/api/v1/errors_test.go
View file

@ -170,11 +170,11 @@ type errorTestQuerier struct {
err error
}
func (t errorTestQuerier) LabelValues(context.Context, string, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (t errorTestQuerier) LabelValues(context.Context, string, *storage.LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
return nil, nil, t.err
}
func (t errorTestQuerier) LabelNames(context.Context, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
func (t errorTestQuerier) LabelNames(context.Context, *storage.LabelHints, ...*labels.Matcher) ([]string, annotations.Annotations, error) {
return nil, nil, t.err
}