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https://github.com/VictoriaMetrics/VictoriaMetrics.git
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f57d0461c7
More key concept tests - Verify how the time range points are calculated - Vefify that a range query is equivalent to many instant queries Fix docs accordingly. ### Checklist The following checks are **mandatory**: - [x] My change adheres [VictoriaMetrics contributing guidelines](https://docs.victoriametrics.com/contributing/). Signed-off-by: Artem Fetishev <rtm@victoriametrics.com>
234 lines
10 KiB
Go
234 lines
10 KiB
Go
package tests
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import (
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"testing"
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"time"
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"github.com/VictoriaMetrics/VictoriaMetrics/apptest"
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"github.com/google/go-cmp/cmp"
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"github.com/google/go-cmp/cmp/cmpopts"
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)
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// Data used in examples in
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// https://docs.victoriametrics.com/keyconcepts/#instant-query and
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// https://docs.victoriametrics.com/keyconcepts/#range-query
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var docData = []string{
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"foo_bar 1.00 1652169600000", // 2022-05-10T08:00:00Z
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"foo_bar 2.00 1652169660000", // 2022-05-10T08:01:00Z
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"foo_bar 3.00 1652169720000", // 2022-05-10T08:02:00Z
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"foo_bar 5.00 1652169840000", // 2022-05-10T08:04:00Z, one point missed
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"foo_bar 5.50 1652169960000", // 2022-05-10T08:06:00Z, one point missed
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"foo_bar 5.50 1652170020000", // 2022-05-10T08:07:00Z
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"foo_bar 4.00 1652170080000", // 2022-05-10T08:08:00Z
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"foo_bar 3.50 1652170260000", // 2022-05-10T08:11:00Z, two points missed
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"foo_bar 3.25 1652170320000", // 2022-05-10T08:12:00Z
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"foo_bar 3.00 1652170380000", // 2022-05-10T08:13:00Z
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"foo_bar 2.00 1652170440000", // 2022-05-10T08:14:00Z
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"foo_bar 1.00 1652170500000", // 2022-05-10T08:15:00Z
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"foo_bar 4.00 1652170560000", // 2022-05-10T08:16:00Z
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}
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// TestSingleKeyConceptsQuery verifies cases from https://docs.victoriametrics.com/keyconcepts/#query-data
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func TestSingleKeyConceptsQuery(t *testing.T) {
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tc := apptest.NewTestCase(t)
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defer tc.Stop()
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vmsingle := tc.MustStartVmsingle("vmsingle", []string{
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"-storageDataPath=" + tc.Dir() + "/vmstorage",
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"-retentionPeriod=100y",
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})
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opts := apptest.QueryOpts{Timeout: "5s"}
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// Insert example data from documentation.
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vmsingle.PrometheusAPIV1ImportPrometheus(t, docData, opts)
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vmsingle.ForceFlush(t)
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testInstantQuery(t, vmsingle, opts)
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testRangeQuery(t, vmsingle, opts)
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testRangeQueryIsEquivalentToManyInstantQueries(t, vmsingle, opts)
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}
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// TestClusterKeyConceptsQuery verifies cases from https://docs.victoriametrics.com/keyconcepts/#query-data
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func TestClusterKeyConceptsQuery(t *testing.T) {
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tc := apptest.NewTestCase(t)
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defer tc.Stop()
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// Set up the following cluster configuration:
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//
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// - two vmstorage instances
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// - vminsert points to the two vmstorages, its replication setting
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// is off which means it will only shard the incoming data across the two
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// vmstorages.
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// - vmselect points to the two vmstorages and is expected to query both
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// vmstorages and build the full result out of the two partial results.
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vmstorage1 := tc.MustStartVmstorage("vmstorage-1", []string{
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"-storageDataPath=" + tc.Dir() + "/vmstorage-1",
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"-retentionPeriod=100y",
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})
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vmstorage2 := tc.MustStartVmstorage("vmstorage-2", []string{
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"-storageDataPath=" + tc.Dir() + "/vmstorage-2",
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"-retentionPeriod=100y",
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})
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vminsert := tc.MustStartVminsert("vminsert", []string{
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"-storageNode=" + vmstorage1.VminsertAddr() + "," + vmstorage2.VminsertAddr(),
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})
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vmselect := tc.MustStartVmselect("vmselect", []string{
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"-storageNode=" + vmstorage1.VmselectAddr() + "," + vmstorage2.VmselectAddr(),
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})
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opts := apptest.QueryOpts{Timeout: "5s", Tenant: "0"}
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// Insert example data from documentation.
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vminsert.PrometheusAPIV1ImportPrometheus(t, docData, opts)
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time.Sleep(2 * time.Second)
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vmstorage1.ForceFlush(t)
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vmstorage2.ForceFlush(t)
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testInstantQuery(t, vmselect, opts)
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testRangeQuery(t, vmselect, opts)
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testRangeQueryIsEquivalentToManyInstantQueries(t, vmselect, opts)
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}
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// testInstantQuery verifies the statements made in the `Instant query` section
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// of the VictoriaMetrics documentation. See:
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// https://docs.victoriametrics.com/keyconcepts/#instant-query
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func testInstantQuery(t *testing.T, q apptest.PrometheusQuerier, opts apptest.QueryOpts) {
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// Get the value of the foo_bar time series at 2022-05-10T08:03:00Z with the
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// step of 5m and timeout 5s. There is no sample at exactly this timestamp.
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// Therefore, VictoriaMetrics will search for the nearest sample within the
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// [time-5m..time] interval.
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got := q.PrometheusAPIV1Query(t, "foo_bar", "2022-05-10T08:03:00.000Z", "5m", opts)
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want := apptest.NewPrometheusAPIV1QueryResponse(t, `{"data":{"result":[{"metric":{"__name__":"foo_bar"},"value":[1652169780,"3"]}]}}`)
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opt := cmpopts.IgnoreFields(apptest.PrometheusAPIV1QueryResponse{}, "Status", "Data.ResultType")
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if diff := cmp.Diff(want, got, opt); diff != "" {
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t.Errorf("unexpected response (-want, +got):\n%s", diff)
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}
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// Get the value of the foo_bar time series at 2022-05-10T08:18:00Z with the
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// step of 1m and timeout 5s. There is no sample at this timestamp.
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// Therefore, VictoriaMetrics will search for the nearest sample within the
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// [time-1m..time] interval. Since the nearest sample is 2m away and the
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// step is 1m, then the VictoriaMetrics must return empty response.
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got = q.PrometheusAPIV1Query(t, "foo_bar", "2022-05-10T08:18:00.000Z", "1m", opts)
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if len(got.Data.Result) > 0 {
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t.Errorf("unexpected response: got non-empty result, want empty result:\n%v", got)
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}
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}
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// testRangeQuery verifies the statements made in the `Range query` section of
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// the VictoriaMetrics documentation. See:
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// https://docs.victoriametrics.com/keyconcepts/#range-query
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func testRangeQuery(t *testing.T, q apptest.PrometheusQuerier, opts apptest.QueryOpts) {
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f := func(start, end, step string, wantSamples []*apptest.Sample) {
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t.Helper()
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got := q.PrometheusAPIV1QueryRange(t, "foo_bar", start, end, step, opts)
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want := apptest.NewPrometheusAPIV1QueryResponse(t, `{"data": {"result": [{"metric": {"__name__": "foo_bar"}, "values": []}]}}`)
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want.Data.Result[0].Samples = wantSamples
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opt := cmpopts.IgnoreFields(apptest.PrometheusAPIV1QueryResponse{}, "Status", "Data.ResultType")
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if diff := cmp.Diff(want, got, opt); diff != "" {
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t.Errorf("unexpected response (-want, +got):\n%s", diff)
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}
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}
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// Verify the statement that the query result for
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// [2022-05-10T07:59:00Z..2022-05-10T08:17:00Z] time range and 1m step will
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// contain 17 points.
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f("2022-05-10T07:59:00.000Z", "2022-05-10T08:17:00.000Z", "1m", []*apptest.Sample{
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// Sample for 2022-05-10T07:59:00Z is missing because the time series has
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// samples only starting from 8:00.
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apptest.NewSample(t, "2022-05-10T08:00:00Z", 1),
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apptest.NewSample(t, "2022-05-10T08:01:00Z", 2),
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apptest.NewSample(t, "2022-05-10T08:02:00Z", 3),
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apptest.NewSample(t, "2022-05-10T08:03:00Z", 3),
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apptest.NewSample(t, "2022-05-10T08:04:00Z", 5),
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apptest.NewSample(t, "2022-05-10T08:05:00Z", 5),
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apptest.NewSample(t, "2022-05-10T08:06:00Z", 5.5),
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apptest.NewSample(t, "2022-05-10T08:07:00Z", 5.5),
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apptest.NewSample(t, "2022-05-10T08:08:00Z", 4),
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apptest.NewSample(t, "2022-05-10T08:09:00Z", 4),
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// Sample for 2022-05-10T08:10:00Z is missing because there is no sample
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// within the [8:10 - 1m .. 8:10] interval.
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apptest.NewSample(t, "2022-05-10T08:11:00Z", 3.5),
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apptest.NewSample(t, "2022-05-10T08:12:00Z", 3.25),
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apptest.NewSample(t, "2022-05-10T08:13:00Z", 3),
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apptest.NewSample(t, "2022-05-10T08:14:00Z", 2),
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apptest.NewSample(t, "2022-05-10T08:15:00Z", 1),
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apptest.NewSample(t, "2022-05-10T08:16:00Z", 4),
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apptest.NewSample(t, "2022-05-10T08:17:00Z", 4),
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})
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// Verify the statement that a query is executed at start, start+step,
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// start+2*step, …, step+N*step timestamps, where N is the whole number
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// of steps that fit between start and end.
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f("2022-05-10T08:00:01.000Z", "2022-05-10T08:02:00.000Z", "1m", []*apptest.Sample{
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apptest.NewSample(t, "2022-05-10T08:00:01Z", 1),
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apptest.NewSample(t, "2022-05-10T08:01:01Z", 2),
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})
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// Verify the statement that a query is executed at start, start+step,
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// start+2*step, …, end timestamps, when end = start + N*step.
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f("2022-05-10T08:00:00.000Z", "2022-05-10T08:02:00.000Z", "1m", []*apptest.Sample{
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apptest.NewSample(t, "2022-05-10T08:00:00Z", 1),
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apptest.NewSample(t, "2022-05-10T08:01:00Z", 2),
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apptest.NewSample(t, "2022-05-10T08:02:00Z", 3),
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})
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// If the step isn’t set, then it defaults to 5m (5 minutes).
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f("2022-05-10T07:59:00.000Z", "2022-05-10T08:17:00.000Z", "", []*apptest.Sample{
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// Sample for 2022-05-10T07:59:00Z is missing because the time series has
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// samples only starting from 8:00.
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apptest.NewSample(t, "2022-05-10T08:04:00Z", 5),
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apptest.NewSample(t, "2022-05-10T08:09:00Z", 4),
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apptest.NewSample(t, "2022-05-10T08:14:00Z", 2),
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})
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}
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// testRangeQueryIsEquivalentToManyInstantQueries verifies the statement made in
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// the `Range query` section of the VictoriaMetrics documentation that a range
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// query is actually an instant query executed 1 + (start-end)/step times on the
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// time range from start to end. See:
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// https://docs.victoriametrics.com/keyconcepts/#range-query
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func testRangeQueryIsEquivalentToManyInstantQueries(t *testing.T, q apptest.PrometheusQuerier, opts apptest.QueryOpts) {
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f := func(timestamp string, want *apptest.Sample) {
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t.Helper()
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gotInstant := q.PrometheusAPIV1Query(t, "foo_bar", timestamp, "1m", opts)
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if want == nil {
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if got, want := len(gotInstant.Data.Result), 0; got != want {
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t.Errorf("unexpected instant result size: got %d, want %d", got, want)
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}
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} else {
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got := gotInstant.Data.Result[0].Sample
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if diff := cmp.Diff(want, got); diff != "" {
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t.Errorf("unexpected instant sample (-want, +got):\n%s", diff)
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}
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}
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}
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rangeRes := q.PrometheusAPIV1QueryRange(t, "foo_bar", "2022-05-10T07:59:00.000Z", "2022-05-10T08:17:00.000Z", "1m", opts)
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rangeSamples := rangeRes.Data.Result[0].Samples
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f("2022-05-10T07:59:00.000Z", nil)
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f("2022-05-10T08:00:00.000Z", rangeSamples[0])
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f("2022-05-10T08:01:00.000Z", rangeSamples[1])
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f("2022-05-10T08:02:00.000Z", rangeSamples[2])
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f("2022-05-10T08:03:00.000Z", rangeSamples[3])
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f("2022-05-10T08:04:00.000Z", rangeSamples[4])
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f("2022-05-10T08:05:00.000Z", rangeSamples[5])
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f("2022-05-10T08:06:00.000Z", rangeSamples[6])
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f("2022-05-10T08:07:00.000Z", rangeSamples[7])
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f("2022-05-10T08:08:00.000Z", rangeSamples[8])
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f("2022-05-10T08:09:00.000Z", rangeSamples[9])
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f("2022-05-10T08:10:00.000Z", nil)
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f("2022-05-10T08:11:00.000Z", rangeSamples[10])
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f("2022-05-10T08:12:00.000Z", rangeSamples[11])
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f("2022-05-10T08:13:00.000Z", rangeSamples[12])
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f("2022-05-10T08:14:00.000Z", rangeSamples[13])
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f("2022-05-10T08:15:00.000Z", rangeSamples[14])
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f("2022-05-10T08:16:00.000Z", rangeSamples[15])
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f("2022-05-10T08:17:00.000Z", rangeSamples[16])
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}
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