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Merge pull request #14416 from prometheus/prw2.0-nhcb

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writev2: Add basic support for nhcb.
This commit is contained in:
Bartlomiej Plotka 2024-07-09 08:54:49 +02:00 committed by GitHub
commit 5646c315bd
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GPG Key ID: B5690EEEBB952194
2 changed files with 35 additions and 16 deletions
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7
prompb/io/prometheus/write/v2/codec.go
View File

@ -86,7 +86,6 @@ func (h Histogram) IsFloatHistogram() bool {
// ToIntHistogram returns integer Prometheus histogram from the remote implementation
// of integer histogram. If it's a float histogram, the method returns nil.
// TODO(bwplotka): Add support for incoming NHCB.
func (h Histogram) ToIntHistogram() *histogram.Histogram {
if h.IsFloatHistogram() {
return nil
@ -102,13 +101,13 @@ func (h Histogram) ToIntHistogram() *histogram.Histogram {
PositiveBuckets: h.GetPositiveDeltas(),
NegativeSpans: spansProtoToSpans(h.GetNegativeSpans()),
NegativeBuckets: h.GetNegativeDeltas(),
CustomValues: h.GetCustomValues(),
}
}
// ToFloatHistogram returns float Prometheus histogram from the remote implementation
// of float histogram. If the underlying implementation is an integer histogram, a
// conversion is performed.
// TODO(bwplotka): Add support for incoming NHCB.
func (h Histogram) ToFloatHistogram() *histogram.FloatHistogram {
if h.IsFloatHistogram() {
return &histogram.FloatHistogram{
@ -122,6 +121,7 @@ func (h Histogram) ToFloatHistogram() *histogram.FloatHistogram {
PositiveBuckets: h.GetPositiveCounts(),
NegativeSpans: spansProtoToSpans(h.GetNegativeSpans()),
NegativeBuckets: h.GetNegativeCounts(),
CustomValues: h.GetCustomValues(),
}
}
// Conversion from integer histogram.
@ -136,6 +136,7 @@ func (h Histogram) ToFloatHistogram() *histogram.FloatHistogram {
PositiveBuckets: deltasToCounts(h.GetPositiveDeltas()),
NegativeSpans: spansProtoToSpans(h.GetNegativeSpans()),
NegativeBuckets: deltasToCounts(h.GetNegativeDeltas()),
CustomValues: h.GetCustomValues(),
}
}
@ -171,6 +172,7 @@ func FromIntHistogram(timestamp int64, h *histogram.Histogram) Histogram {
PositiveSpans: spansToSpansProto(h.PositiveSpans),
PositiveDeltas: h.PositiveBuckets,
ResetHint: Histogram_ResetHint(h.CounterResetHint),
CustomValues: h.CustomValues,
Timestamp: timestamp,
}
}
@ -188,6 +190,7 @@ func FromFloatHistogram(timestamp int64, fh *histogram.FloatHistogram) Histogram
PositiveSpans: spansToSpansProto(fh.PositiveSpans),
PositiveCounts: fh.PositiveBuckets,
ResetHint: Histogram_ResetHint(fh.CounterResetHint),
CustomValues: fh.CustomValues,
Timestamp: timestamp,
}
}

44
prompb/rwcommon/codec_test.go
View File

@ -144,10 +144,12 @@ func TestToHistogram_Empty(t *testing.T) {
})
}
// NOTE(bwplotka): This is technically not a valid histogram, but it represents
// important cases to test when copying or converting to/from int/float histograms.
func testIntHistogram() histogram.Histogram {
return histogram.Histogram{
CounterResetHint: histogram.GaugeType,
Schema: 0,
Schema: 1,
Count: 19,
Sum: 2.7,
ZeroThreshold: 1e-128,
@ -163,13 +165,16 @@ func testIntHistogram() histogram.Histogram {
{Offset: 0, Length: 1},
},
NegativeBuckets: []int64{1, 2, -2, 1, -1, 0},
CustomValues: []float64{21421, 523},
}
}
// NOTE(bwplotka): This is technically not a valid histogram, but it represents
// important cases to test when copying or converting to/from int/float histograms.
func testFloatHistogram() histogram.FloatHistogram {
return histogram.FloatHistogram{
CounterResetHint: histogram.GaugeType,
Schema: 0,
Schema: 1,
Count: 19,
Sum: 2.7,
ZeroThreshold: 1e-128,
@ -185,22 +190,29 @@ func testFloatHistogram() histogram.FloatHistogram {
{Offset: 0, Length: 1},
},
NegativeBuckets: []float64{1, 3, 1, 2, 1, 1},
CustomValues: []float64{21421, 523},
}
}
func TestFromIntToFloatOrIntHistogram(t *testing.T) {
testIntHist := testIntHistogram()
testFloatHist := testFloatHistogram()
t.Run("v1", func(t *testing.T) {
h := prompb.FromIntHistogram(123, testIntHist.Copy())
// v1 does not support nhcb.
testIntHistWithoutNHCB := testIntHistogram()
testIntHistWithoutNHCB.CustomValues = nil
testFloatHistWithoutNHCB := testFloatHistogram()
testFloatHistWithoutNHCB.CustomValues = nil
h := prompb.FromIntHistogram(123, &testIntHistWithoutNHCB)
require.False(t, h.IsFloatHistogram())
require.Equal(t, int64(123), h.Timestamp)
require.Equal(t, testIntHist, *h.ToIntHistogram())
require.Equal(t, testFloatHist, *h.ToFloatHistogram())
require.Equal(t, testIntHistWithoutNHCB, *h.ToIntHistogram())
require.Equal(t, testFloatHistWithoutNHCB, *h.ToFloatHistogram())
})
t.Run("v2", func(t *testing.T) {
h := writev2.FromIntHistogram(123, testIntHist.Copy())
testIntHist := testIntHistogram()
testFloatHist := testFloatHistogram()
h := writev2.FromIntHistogram(123, &testIntHist)
require.False(t, h.IsFloatHistogram())
require.Equal(t, int64(123), h.Timestamp)
require.Equal(t, testIntHist, *h.ToIntHistogram())
@ -209,17 +221,21 @@ func TestFromIntToFloatOrIntHistogram(t *testing.T) {
}
func TestFromFloatToFloatHistogram(t *testing.T) {
testFloatHist := testFloatHistogram()
t.Run("v1", func(t *testing.T) {
h := prompb.FromFloatHistogram(123, testFloatHist.Copy())
// v1 does not support nhcb.
testFloatHistWithoutNHCB := testFloatHistogram()
testFloatHistWithoutNHCB.CustomValues = nil
h := prompb.FromFloatHistogram(123, &testFloatHistWithoutNHCB)
require.True(t, h.IsFloatHistogram())
require.Equal(t, int64(123), h.Timestamp)
require.Nil(t, h.ToIntHistogram())
require.Equal(t, testFloatHist, *h.ToFloatHistogram())
require.Equal(t, testFloatHistWithoutNHCB, *h.ToFloatHistogram())
})
t.Run("v2", func(t *testing.T) {
h := writev2.FromFloatHistogram(123, testFloatHist.Copy())
testFloatHist := testFloatHistogram()
h := writev2.FromFloatHistogram(123, &testFloatHist)
require.True(t, h.IsFloatHistogram())
require.Equal(t, int64(123), h.Timestamp)
require.Nil(t, h.ToIntHistogram())