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textparse: Add gauge histogram support to protobuf parsing 

With this commit, the parser stops to see a gauge histogram (whether
native or conventional) as an unexpected metric type. It ingests it
normally, it even sets the `GaugeHistogram` type in the metadata (as
it has already done for a conventional gauge histogram scraped using
OpenMetrics), but it otherwise treats it as a normal counter-like
histogram.

Once #11783 is merged, though, it should be very easy to utilize the
type information.

Signed-off-by: beorn7 <beorn@grafana.com>
This commit is contained in:
beorn7 2023-01-05 15:39:10 +01:00
parent e9d9bb1b08
commit b5d4a94e9d
1 changed files with 13 additions and 6 deletions
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19
model/textparse/protobufparse.go
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@ -105,7 +105,7 @@ func (p *ProtobufParser) Series() ([]byte, *int64, float64) {
default:
v = s.GetQuantile()[p.fieldPos].GetValue()
}
case dto.MetricType_HISTOGRAM:
case dto.MetricType_HISTOGRAM, dto.MetricType_GAUGE_HISTOGRAM:
// This should only happen for a legacy histogram.
h := m.GetHistogram()
switch p.fieldPos {
@ -225,6 +225,8 @@ func (p *ProtobufParser) Type() ([]byte, MetricType) {
return n, MetricTypeGauge
case dto.MetricType_HISTOGRAM:
return n, MetricTypeHistogram
case dto.MetricType_GAUGE_HISTOGRAM:
return n, MetricTypeGaugeHistogram
case dto.MetricType_SUMMARY:
return n, MetricTypeSummary
}
@ -273,7 +275,7 @@ func (p *ProtobufParser) Exemplar(ex *exemplar.Exemplar) bool {
switch p.mf.GetType() {
case dto.MetricType_COUNTER:
exProto = m.GetCounter().GetExemplar()
case dto.MetricType_HISTOGRAM:
case dto.MetricType_HISTOGRAM, dto.MetricType_GAUGE_HISTOGRAM:
bb := m.GetHistogram().GetBucket()
if p.fieldPos < 0 {
if p.state == EntrySeries {
@ -343,6 +345,7 @@ func (p *ProtobufParser) Next() (Entry, error) {
case dto.MetricType_COUNTER,
dto.MetricType_GAUGE,
dto.MetricType_HISTOGRAM,
dto.MetricType_GAUGE_HISTOGRAM,
dto.MetricType_SUMMARY,
dto.MetricType_UNTYPED:
// All good.
@ -356,7 +359,8 @@ func (p *ProtobufParser) Next() (Entry, error) {
case EntryHelp:
p.state = EntryType
case EntryType:
if p.mf.GetType() == dto.MetricType_HISTOGRAM &&
t := p.mf.GetType()
if (t == dto.MetricType_HISTOGRAM || t == dto.MetricType_GAUGE_HISTOGRAM) &&
isNativeHistogram(p.mf.GetMetric()[0].GetHistogram()) {
p.state = EntryHistogram
} else {
@ -366,8 +370,11 @@ func (p *ProtobufParser) Next() (Entry, error) {
return EntryInvalid, err
}
case EntryHistogram, EntrySeries:
t := p.mf.GetType()
if p.state == EntrySeries && !p.fieldsDone &&
(p.mf.GetType() == dto.MetricType_SUMMARY || p.mf.GetType() == dto.MetricType_HISTOGRAM) {
(t == dto.MetricType_SUMMARY ||
t == dto.MetricType_HISTOGRAM ||
t == dto.MetricType_GAUGE_HISTOGRAM) {
p.fieldPos++
} else {
p.metricPos++
@ -428,7 +435,7 @@ func (p *ProtobufParser) getMagicName() string {
if p.fieldPos == -1 {
return p.mf.GetName() + "_sum"
}
if t == dto.MetricType_HISTOGRAM {
if t == dto.MetricType_HISTOGRAM || t == dto.MetricType_GAUGE_HISTOGRAM {
return p.mf.GetName() + "_bucket"
}
return p.mf.GetName()
@ -446,7 +453,7 @@ func (p *ProtobufParser) getMagicLabel() (bool, string, string) {
q := qq[p.fieldPos]
p.fieldsDone = p.fieldPos == len(qq)-1
return true, model.QuantileLabel, formatOpenMetricsFloat(q.GetQuantile())
case dto.MetricType_HISTOGRAM:
case dto.MetricType_HISTOGRAM, dto.MetricType_GAUGE_HISTOGRAM:
bb := p.mf.GetMetric()[p.metricPos].GetHistogram().GetBucket()
if p.fieldPos >= len(bb) {
p.fieldsDone = true