From 3d78564d2ff2706b7af22be043f322d5154ed90c Mon Sep 17 00:00:00 2001 From: Gustavo Silva Paiva Date: Tue, 26 Nov 2019 15:47:15 -0400 Subject: [PATCH] Prometheus exporter (#334) * Prom exporter structure * update prometheus exporter with master and add example. * remove distributedcontext from prometheus example * docs and interface checker * make precommit * make precommit & remove "OnRegisterError" * coerce values to float * return register errors and maybe fix precommit? * add option to specify a prometheus.Registry * make exporter implement http.Handler interface * fix map keys bugs * remove unused const * fix modules dependencies. * add support for histogram * get metrics with labels values only instead of a labels map * make exporter implements label encoder interface * encode labels if the encoder is different. * split metrics on several files and encapsulate them in structs * make pre commit * unexport 'sanitize' * remove 'AllValues' in favor of 'Points' and change to 'NewDefaultLabelEncoder' * add prometheus tests * remove newlines on struct declaration * formatting * rewording * imports * add todo on labelValues * blame myself for todo (: * add todos on sanitize * add support for summaries. custom remove label encoder. * imports * imports * update with upstream --- example/basic/go.sum | 4 +- example/http-stackdriver/go.sum | 2 - example/http/go.sum | 4 +- example/jaeger/go.sum | 4 +- example/namedtracer/go.sum | 4 +- example/prometheus/go.mod | 14 + example/prometheus/go.sum | 309 ++++++++++++++++++ example/prometheus/main.go | 105 ++++++ exporter/metric/internal/statsd/conn_test.go | 44 +-- exporter/metric/prometheus/README.md | 8 + exporter/metric/prometheus/counter.go | 94 ++++++ exporter/metric/prometheus/gauge.go | 94 ++++++ exporter/metric/prometheus/go.mod | 11 + exporter/metric/prometheus/go.sum | 305 +++++++++++++++++ exporter/metric/prometheus/histogram.go | 98 ++++++ exporter/metric/prometheus/prometheus.go | 184 +++++++++++ exporter/metric/prometheus/prometheus_test.go | 148 +++++++++ exporter/metric/prometheus/sanitize.go | 50 +++ exporter/metric/prometheus/sanitize_test.go | 61 ++++ exporter/metric/prometheus/summary.go | 98 ++++++ exporter/metric/test/test.go | 36 ++ exporter/trace/jaeger/go.sum | 4 +- exporter/trace/stackdriver/go.sum | 1 - go.mod | 2 +- go.sum | 10 +- sdk/metric/aggregator/array/array_test.go | 7 + sdk/metric/aggregator/test/test.go | 4 + 27 files changed, 1650 insertions(+), 55 deletions(-) create mode 100644 example/prometheus/go.mod create mode 100644 example/prometheus/go.sum create mode 100644 example/prometheus/main.go create mode 100644 exporter/metric/prometheus/README.md create mode 100644 exporter/metric/prometheus/counter.go create mode 100644 exporter/metric/prometheus/gauge.go create mode 100644 exporter/metric/prometheus/go.mod create mode 100644 exporter/metric/prometheus/go.sum create mode 100644 exporter/metric/prometheus/histogram.go create mode 100644 exporter/metric/prometheus/prometheus.go create mode 100644 exporter/metric/prometheus/prometheus_test.go create mode 100644 exporter/metric/prometheus/sanitize.go create mode 100644 exporter/metric/prometheus/sanitize_test.go create mode 100644 exporter/metric/prometheus/summary.go diff --git a/example/basic/go.sum b/example/basic/go.sum index ea2c8158d..ee2fea89a 100644 --- a/example/basic/go.sum +++ b/example/basic/go.sum @@ -272,8 +272,8 @@ google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9Ywl google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8 h1:Nw54tB0rB7hY/N0NQvRW8DG4Yk3Q6T9cu9RcFQDu1tc= google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb h1:KyQ8P4ITs8M0jBWofeXBAlng8kJVbXKyliNX5w2w/ng= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= +google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03 h1:4HYDjxeNXAOTv3o1N2tjo8UUSlhQgAD52FVkwxnWgM8= +google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= google.golang.org/grpc v1.24.0 h1:vb/1TCsVn3DcJlQ0Gs1yB1pKI6Do2/QNwxdKqmc/b0s= diff --git a/example/http-stackdriver/go.sum b/example/http-stackdriver/go.sum index 98fa8cc22..77fd64936 100644 --- a/example/http-stackdriver/go.sum +++ b/example/http-stackdriver/go.sum @@ -359,8 +359,6 @@ google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRn google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc= google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc= google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb h1:KyQ8P4ITs8M0jBWofeXBAlng8kJVbXKyliNX5w2w/ng= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03 h1:4HYDjxeNXAOTv3o1N2tjo8UUSlhQgAD52FVkwxnWgM8= google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= diff --git a/example/http/go.sum b/example/http/go.sum index 8b6c7745e..5dfc209f5 100644 --- a/example/http/go.sum +++ b/example/http/go.sum @@ -275,8 +275,8 @@ google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9Ywl google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8 h1:Nw54tB0rB7hY/N0NQvRW8DG4Yk3Q6T9cu9RcFQDu1tc= google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb h1:KyQ8P4ITs8M0jBWofeXBAlng8kJVbXKyliNX5w2w/ng= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= +google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03 h1:4HYDjxeNXAOTv3o1N2tjo8UUSlhQgAD52FVkwxnWgM8= +google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= google.golang.org/grpc v1.24.0 h1:vb/1TCsVn3DcJlQ0Gs1yB1pKI6Do2/QNwxdKqmc/b0s= diff --git a/example/jaeger/go.sum b/example/jaeger/go.sum index 869da5449..f8788f8a8 100644 --- a/example/jaeger/go.sum +++ b/example/jaeger/go.sum @@ -300,8 +300,8 @@ google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoA google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb h1:KyQ8P4ITs8M0jBWofeXBAlng8kJVbXKyliNX5w2w/ng= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= +google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03 h1:4HYDjxeNXAOTv3o1N2tjo8UUSlhQgAD52FVkwxnWgM8= +google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38= google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= diff --git a/example/namedtracer/go.sum b/example/namedtracer/go.sum index d80bfd22f..69a0e4af9 100644 --- a/example/namedtracer/go.sum +++ b/example/namedtracer/go.sum @@ -269,8 +269,8 @@ google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9Ywl google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8 h1:Nw54tB0rB7hY/N0NQvRW8DG4Yk3Q6T9cu9RcFQDu1tc= google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb h1:KyQ8P4ITs8M0jBWofeXBAlng8kJVbXKyliNX5w2w/ng= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= +google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03 h1:4HYDjxeNXAOTv3o1N2tjo8UUSlhQgAD52FVkwxnWgM8= +google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= google.golang.org/grpc v1.24.0 h1:vb/1TCsVn3DcJlQ0Gs1yB1pKI6Do2/QNwxdKqmc/b0s= diff --git a/example/prometheus/go.mod b/example/prometheus/go.mod new file mode 100644 index 000000000..dcad5d513 --- /dev/null +++ b/example/prometheus/go.mod @@ -0,0 +1,14 @@ +module go.opentelemetry.io/otel/example/prometheus + +go 1.13 + +replace ( + go.opentelemetry.io/otel => ../.. + go.opentelemetry.io/otel/exporter/metric/prometheus => ../../exporter/metric/prometheus +) + +require ( + go.opentelemetry.io/otel v0.1.2 + go.opentelemetry.io/otel/exporter/metric/prometheus v0.0.0 + +) diff --git a/example/prometheus/go.sum b/example/prometheus/go.sum new file mode 100644 index 000000000..34e41077b --- /dev/null +++ b/example/prometheus/go.sum @@ -0,0 +1,309 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/DataDog/sketches-go v0.0.0-20190923095040-43f19ad77ff7 h1:qELHH0AWCvf98Yf+CNIJx9vOZOfHFDDzgDRYsnNk/vs= +github.com/DataDog/sketches-go v0.0.0-20190923095040-43f19ad77ff7/go.mod h1:Q5DbzQ+3AkgGwymQO7aZFNP7ns2lZKGtvRBzRXfdi60= +github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU= +github.com/OpenPeeDeeP/depguard v1.0.1/go.mod 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+mvdan.cc/unparam v0.0.0-20190720180237-d51796306d8f/go.mod h1:4G1h5nDURzA3bwVMZIVpwbkw+04kSxk3rAtzlimaUJw= +mvdan.cc/unparam v0.0.0-20190917161559-b83a221c10a2/go.mod h1:rCqoQrfAmpTX/h2APczwM7UymU/uvaOluiVPIYCSY/k= +sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0= +sourcegraph.com/sqs/pbtypes v1.0.0/go.mod h1:3AciMUv4qUuRHRHhOG4TZOB+72GdPVz5k+c648qsFS4= diff --git a/example/prometheus/main.go b/example/prometheus/main.go new file mode 100644 index 000000000..07a57385b --- /dev/null +++ b/example/prometheus/main.go @@ -0,0 +1,105 @@ +// Copyright 2019, OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package main + +import ( + "context" + "log" + "net/http" + "time" + + "go.opentelemetry.io/otel/api/global" + "go.opentelemetry.io/otel/api/key" + "go.opentelemetry.io/otel/api/metric" + "go.opentelemetry.io/otel/exporter/metric/prometheus" + sdkmetric "go.opentelemetry.io/otel/sdk/metric" + "go.opentelemetry.io/otel/sdk/metric/batcher/defaultkeys" + "go.opentelemetry.io/otel/sdk/metric/controller/push" + "go.opentelemetry.io/otel/sdk/metric/selector/simple" +) + +var ( + fooKey = key.New("ex.com/foo") + barKey = key.New("ex.com/bar") + lemonsKey = key.New("ex.com/lemons") +) + +func initMeter() *push.Controller { + selector := simple.NewWithExactMeasure() + exporter, err := prometheus.NewExporter(prometheus.Options{ + DefaultHistogramBuckets: []float64{0., 10., 15., 20.}, + }) + + if err != nil { + log.Panicf("failed to initialize metric stdout exporter %v", err) + } + batcher := defaultkeys.New(selector, sdkmetric.NewDefaultLabelEncoder(), false) + pusher := push.New(batcher, exporter, time.Second) + pusher.Start() + + go func() { + _ = http.ListenAndServe(":2222", exporter) + }() + + global.SetMeterProvider(pusher) + return pusher +} + +func main() { + defer initMeter().Stop() + + meter := global.MeterProvider().Meter("ex.com/basic") + + oneMetric := meter.NewFloat64Gauge("ex.com.one", + metric.WithKeys(fooKey, barKey, lemonsKey), + metric.WithDescription("A gauge set to 1.0"), + ) + + measureTwo := meter.NewFloat64Measure("ex.com.two", metric.WithKeys(key.New("A"))) + measureThree := meter.NewFloat64Counter("ex.com.three") + + commonLabels := meter.Labels(lemonsKey.Int(10), key.String("A", "1"), key.String("B", "2"), key.String("C", "3")) + notSoCommonLabels := meter.Labels(lemonsKey.Int(13)) + + ctx := context.Background() + + meter.RecordBatch( + ctx, + commonLabels, + oneMetric.Measurement(1.0), + measureTwo.Measurement(2.0), + measureThree.Measurement(12.0), + ) + + meter.RecordBatch( + ctx, + notSoCommonLabels, + oneMetric.Measurement(1.0), + measureTwo.Measurement(2.0), + measureThree.Measurement(22.0), + ) + + time.Sleep(5 * time.Second) + + meter.RecordBatch( + ctx, + commonLabels, + oneMetric.Measurement(13.0), + measureTwo.Measurement(12.0), + measureThree.Measurement(13.0), + ) + + time.Sleep(100 * time.Second) +} diff --git a/exporter/metric/internal/statsd/conn_test.go b/exporter/metric/internal/statsd/conn_test.go index 4bb3d419a..67198eb6e 100644 --- a/exporter/metric/internal/statsd/conn_test.go +++ b/exporter/metric/internal/statsd/conn_test.go @@ -31,9 +31,6 @@ import ( "go.opentelemetry.io/otel/exporter/metric/test" export "go.opentelemetry.io/otel/sdk/export/metric" sdk "go.opentelemetry.io/otel/sdk/metric" - "go.opentelemetry.io/otel/sdk/metric/aggregator/array" - "go.opentelemetry.io/otel/sdk/metric/aggregator/counter" - "go.opentelemetry.io/otel/sdk/metric/aggregator/gauge" ) // withTagsAdapter tests a dogstatsd-style statsd exporter. @@ -86,37 +83,6 @@ func (w *testWriter) Write(b []byte) (int, error) { return len(b), nil } -func testNumber(desc *export.Descriptor, v float64) core.Number { - if desc.NumberKind() == core.Float64NumberKind { - return core.NewFloat64Number(v) - } - return core.NewInt64Number(int64(v)) -} - -func gaugeAgg(desc *export.Descriptor, v float64) export.Aggregator { - ctx := context.Background() - gagg := gauge.New() - _ = gagg.Update(ctx, testNumber(desc, v), desc) - gagg.Checkpoint(ctx, desc) - return gagg -} - -func counterAgg(desc *export.Descriptor, v float64) export.Aggregator { - ctx := context.Background() - cagg := counter.New() - _ = cagg.Update(ctx, testNumber(desc, v), desc) - cagg.Checkpoint(ctx, desc) - return cagg -} - -func measureAgg(desc *export.Descriptor, v float64) export.Aggregator { - ctx := context.Background() - magg := array.New() - _ = magg.Update(ctx, testNumber(desc, v), desc) - magg.Checkpoint(ctx, desc) - return magg -} - func TestBasicFormat(t *testing.T) { type adapterOutput struct { adapter statsd.Adapter @@ -172,10 +138,10 @@ timer.B.D:%s|ms } const value = 123.456 - checkpointSet.Add(cdesc, counterAgg(cdesc, value), labels...) - checkpointSet.Add(gdesc, gaugeAgg(gdesc, value), labels...) - checkpointSet.Add(mdesc, measureAgg(mdesc, value), labels...) - checkpointSet.Add(tdesc, measureAgg(tdesc, value), labels...) + checkpointSet.AddCounter(cdesc, value, labels...) + checkpointSet.AddGauge(gdesc, value, labels...) + checkpointSet.AddMeasure(mdesc, value, labels...) + checkpointSet.AddMeasure(tdesc, value, labels...) err = exp.Export(ctx, checkpointSet) require.Nil(t, err) @@ -329,7 +295,7 @@ func TestPacketSplit(t *testing.T) { offset += nkeys expect := fmt.Sprint("counter:100|c", adapter.LabelEncoder.Encode(labels), "\n") expected = append(expected, expect) - checkpointSet.Add(desc, counterAgg(desc, 100), labels...) + checkpointSet.AddCounter(desc, 100, labels...) }) err = exp.Export(ctx, checkpointSet) diff --git a/exporter/metric/prometheus/README.md b/exporter/metric/prometheus/README.md new file mode 100644 index 000000000..7d8837416 --- /dev/null +++ b/exporter/metric/prometheus/README.md @@ -0,0 +1,8 @@ +# OpenTelemetry-Go Prometheus Exporter + +OpenTelemetry Prometheus exporter + +## Installation +``` +go get -u go.opentelemetry.io/exporter/metric/prometheus +``` \ No newline at end of file diff --git a/exporter/metric/prometheus/counter.go b/exporter/metric/prometheus/counter.go new file mode 100644 index 000000000..e75c891de --- /dev/null +++ b/exporter/metric/prometheus/counter.go @@ -0,0 +1,94 @@ +// Copyright 2019, OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "github.com/prometheus/client_golang/prometheus" + + export "go.opentelemetry.io/otel/sdk/export/metric" + "go.opentelemetry.io/otel/sdk/export/metric/aggregator" +) + +type counters struct { + registerer prometheus.Registerer + counters map[metricKey]prometheus.Counter + counterVecs map[*export.Descriptor]*prometheus.CounterVec +} + +func newCounters(registerer prometheus.Registerer) counters { + return counters{ + registerer: registerer, + counters: make(map[metricKey]prometheus.Counter), + counterVecs: make(map[*export.Descriptor]*prometheus.CounterVec), + } +} + +func (co *counters) export(sum aggregator.Sum, record export.Record, mKey metricKey) error { + value, err := sum.Sum() + if err != nil { + return err + } + + c, err := co.getCounter(record, mKey) + if err != nil { + return err + } + + desc := record.Descriptor() + c.Add(value.CoerceToFloat64(desc.NumberKind())) + + return nil +} + +func (co *counters) getCounter(record export.Record, mKey metricKey) (prometheus.Counter, error) { + if c, ok := co.counters[mKey]; ok { + return c, nil + } + + desc := record.Descriptor() + counterVec, err := co.getCounterVec(desc, record.Labels()) + if err != nil { + return nil, err + } + + counter, err := counterVec.GetMetricWithLabelValues(labelValues(record.Labels())...) + if err != nil { + return nil, err + } + + co.counters[mKey] = counter + return counter, nil +} + +func (co *counters) getCounterVec(desc *export.Descriptor, labels export.Labels) (*prometheus.CounterVec, error) { + if c, ok := co.counterVecs[desc]; ok { + return c, nil + } + + c := prometheus.NewCounterVec( + prometheus.CounterOpts{ + Name: sanitize(desc.Name()), + Help: desc.Description(), + }, + labelsKeys(labels.Ordered()), + ) + + if err := co.registerer.Register(c); err != nil { + return nil, err + } + + co.counterVecs[desc] = c + return c, nil +} diff --git a/exporter/metric/prometheus/gauge.go b/exporter/metric/prometheus/gauge.go new file mode 100644 index 000000000..81463c6a8 --- /dev/null +++ b/exporter/metric/prometheus/gauge.go @@ -0,0 +1,94 @@ +// Copyright 2019, OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "github.com/prometheus/client_golang/prometheus" + + export "go.opentelemetry.io/otel/sdk/export/metric" + "go.opentelemetry.io/otel/sdk/export/metric/aggregator" +) + +type gauges struct { + registerer prometheus.Registerer + gauges map[metricKey]prometheus.Gauge + gaugeVecs map[*export.Descriptor]*prometheus.GaugeVec +} + +func newGauges(registerer prometheus.Registerer) gauges { + return gauges{ + registerer: registerer, + gauges: make(map[metricKey]prometheus.Gauge), + gaugeVecs: make(map[*export.Descriptor]*prometheus.GaugeVec), + } +} + +func (ga *gauges) export(gauge aggregator.LastValue, record export.Record, mKey metricKey) error { + lv, _, err := gauge.LastValue() + if err != nil { + return err + } + + g, err := ga.getGauge(record, mKey) + if err != nil { + return err + } + + desc := record.Descriptor() + g.Set(lv.CoerceToFloat64(desc.NumberKind())) + + return nil +} + +func (ga *gauges) getGauge(record export.Record, mKey metricKey) (prometheus.Gauge, error) { + if c, ok := ga.gauges[mKey]; ok { + return c, nil + } + + desc := record.Descriptor() + gaugeVec, err := ga.getGaugeVec(desc, record.Labels()) + if err != nil { + return nil, err + } + + gauge, err := gaugeVec.GetMetricWithLabelValues(labelValues(record.Labels())...) + if err != nil { + return nil, err + } + + ga.gauges[mKey] = gauge + return gauge, nil +} + +func (ga *gauges) getGaugeVec(desc *export.Descriptor, labels export.Labels) (*prometheus.GaugeVec, error) { + if gv, ok := ga.gaugeVecs[desc]; ok { + return gv, nil + } + + g := prometheus.NewGaugeVec( + prometheus.GaugeOpts{ + Name: sanitize(desc.Name()), + Help: desc.Description(), + }, + labelsKeys(labels.Ordered()), + ) + + if err := ga.registerer.Register(g); err != nil { + return nil, err + } + + ga.gaugeVecs[desc] = g + return g, nil +} diff --git a/exporter/metric/prometheus/go.mod b/exporter/metric/prometheus/go.mod new file mode 100644 index 000000000..5ba53abda --- /dev/null +++ b/exporter/metric/prometheus/go.mod @@ -0,0 +1,11 @@ +module go.opentelemetry.io/otel/exporter/metric/prometheus + +go 1.13 + +replace go.opentelemetry.io/otel => ../../.. + +require ( + github.com/prometheus/client_golang v0.9.3 + github.com/stretchr/testify v1.4.0 + go.opentelemetry.io/otel v0.1.0 +) diff --git a/exporter/metric/prometheus/go.sum b/exporter/metric/prometheus/go.sum new file mode 100644 index 000000000..bac20f55c --- /dev/null +++ b/exporter/metric/prometheus/go.sum @@ -0,0 +1,305 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/DataDog/sketches-go v0.0.0-20190923095040-43f19ad77ff7 h1:qELHH0AWCvf98Yf+CNIJx9vOZOfHFDDzgDRYsnNk/vs= +github.com/DataDog/sketches-go 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h1:rCqoQrfAmpTX/h2APczwM7UymU/uvaOluiVPIYCSY/k= +sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0= +sourcegraph.com/sqs/pbtypes v1.0.0/go.mod h1:3AciMUv4qUuRHRHhOG4TZOB+72GdPVz5k+c648qsFS4= diff --git a/exporter/metric/prometheus/histogram.go b/exporter/metric/prometheus/histogram.go new file mode 100644 index 000000000..e680fdef1 --- /dev/null +++ b/exporter/metric/prometheus/histogram.go @@ -0,0 +1,98 @@ +// Copyright 2019, OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "github.com/prometheus/client_golang/prometheus" + + export "go.opentelemetry.io/otel/sdk/export/metric" + "go.opentelemetry.io/otel/sdk/export/metric/aggregator" +) + +type histograms struct { + defaultHistogramBuckets []float64 + registerer prometheus.Registerer + histogram map[metricKey]prometheus.Observer + histogramVecs map[*export.Descriptor]*prometheus.HistogramVec +} + +func newHistograms(registerer prometheus.Registerer, defaultHistogramBuckets []float64) histograms { + return histograms{ + registerer: registerer, + histogram: make(map[metricKey]prometheus.Observer), + histogramVecs: make(map[*export.Descriptor]*prometheus.HistogramVec), + defaultHistogramBuckets: defaultHistogramBuckets, + } +} + +func (hi *histograms) export(points aggregator.Points, record export.Record, mKey metricKey) error { + values, err := points.Points() + if err != nil { + return err + } + + obs, err := hi.getHistogram(record, mKey) + if err != nil { + return err + } + + desc := record.Descriptor() + for _, v := range values { + obs.Observe(v.CoerceToFloat64(desc.NumberKind())) + } + return nil +} + +func (hi *histograms) getHistogram(record export.Record, mKey metricKey) (prometheus.Observer, error) { + if c, ok := hi.histogram[mKey]; ok { + return c, nil + } + + desc := record.Descriptor() + histogramVec, err := hi.getHistogramVec(desc, record.Labels()) + if err != nil { + return nil, err + } + + obs, err := histogramVec.GetMetricWithLabelValues(labelValues(record.Labels())...) + if err != nil { + return nil, err + } + + hi.histogram[mKey] = obs + return obs, nil +} + +func (hi *histograms) getHistogramVec(desc *export.Descriptor, labels export.Labels) (*prometheus.HistogramVec, error) { + if gv, ok := hi.histogramVecs[desc]; ok { + return gv, nil + } + + g := prometheus.NewHistogramVec( + prometheus.HistogramOpts{ + Name: sanitize(desc.Name()), + Help: desc.Description(), + Buckets: hi.defaultHistogramBuckets, + }, + labelsKeys(labels.Ordered()), + ) + + if err := hi.registerer.Register(g); err != nil { + return nil, err + } + + hi.histogramVecs[desc] = g + return g, nil +} diff --git a/exporter/metric/prometheus/prometheus.go b/exporter/metric/prometheus/prometheus.go new file mode 100644 index 000000000..5bc593f66 --- /dev/null +++ b/exporter/metric/prometheus/prometheus.go @@ -0,0 +1,184 @@ +// Copyright 2019, OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "context" + "net/http" + + "github.com/prometheus/client_golang/prometheus" + "github.com/prometheus/client_golang/prometheus/promhttp" + + "go.opentelemetry.io/otel/api/core" + export "go.opentelemetry.io/otel/sdk/export/metric" + "go.opentelemetry.io/otel/sdk/export/metric/aggregator" +) + +type metricKey struct { + desc *export.Descriptor + encoded string +} + +// Exporter is an implementation of metric.Exporter that sends metrics to +// Prometheus. +type Exporter struct { + handler http.Handler + + registerer prometheus.Registerer + gatherer prometheus.Gatherer + + counters counters + gauges gauges + histograms histograms + summaries summaries + measureAggregation MeasureAggregation +} + +var _ export.Exporter = &Exporter{} +var _ http.Handler = &Exporter{} + +// Options is a set of options for the tally reporter. +type Options struct { + // Registry is the prometheus registry that will be used as the default Registerer and + // Gatherer if these are not specified. + // + // If not set a new empty Registry is created. + Registry *prometheus.Registry + + // Registerer is the prometheus registerer to register + // metrics with. + // + // If not specified the Registry will be used as default. + Registerer prometheus.Registerer + + // Gatherer is the prometheus gatherer to gather + // metrics with. + // + // If not specified the Registry will be used as default. + Gatherer prometheus.Gatherer + + // DefaultHistogramBuckets is the default histogram buckets + // to use. Use nil to specify the system-default histogram buckets. + DefaultHistogramBuckets []float64 + + // DefaultSummaryObjectives is the default summary objectives + // to use. Use nil to specify the system-default summary objectives. + DefaultSummaryObjectives map[float64]float64 + + // MeasureAggregation defines how metric.Measure are exported. + // Possible values are 'Histogram' or 'Summary'. + // The default export representation for measures is Histograms. + MeasureAggregation MeasureAggregation +} + +type MeasureAggregation int + +const ( + Histogram MeasureAggregation = iota + Summary +) + +// NewExporter returns a new prometheus exporter for prometheus metrics. +func NewExporter(opts Options) (*Exporter, error) { + if opts.Registry == nil { + opts.Registry = prometheus.NewRegistry() + } + + if opts.Registerer == nil { + opts.Registerer = opts.Registry + } + + if opts.Gatherer == nil { + opts.Gatherer = opts.Registry + } + + return &Exporter{ + registerer: opts.Registerer, + gatherer: opts.Gatherer, + handler: promhttp.HandlerFor(opts.Gatherer, promhttp.HandlerOpts{}), + measureAggregation: opts.MeasureAggregation, + + counters: newCounters(opts.Registerer), + gauges: newGauges(opts.Registerer), + histograms: newHistograms(opts.Registerer, opts.DefaultHistogramBuckets), + summaries: newSummaries(opts.Registerer, opts.DefaultSummaryObjectives), + }, nil +} + +// Export exports the provide metric record to prometheus. +func (e *Exporter) Export(_ context.Context, checkpointSet export.CheckpointSet) error { + var forEachError error + checkpointSet.ForEach(func(record export.Record) { + agg := record.Aggregator() + + mKey := metricKey{ + desc: record.Descriptor(), + encoded: record.Labels().Encoded(), + } + + if points, ok := agg.(aggregator.Points); ok { + observerExporter := e.histograms.export + if e.measureAggregation == Summary { + observerExporter = e.summaries.export + } + + err := observerExporter(points, record, mKey) + if err != nil { + forEachError = err + } + return + } + + if sum, ok := agg.(aggregator.Sum); ok { + err := e.counters.export(sum, record, mKey) + if err != nil { + forEachError = err + } + return + } + + if gauge, ok := agg.(aggregator.LastValue); ok { + err := e.gauges.export(gauge, record, mKey) + if err != nil { + forEachError = err + } + return + } + }) + + return forEachError +} + +func (e *Exporter) ServeHTTP(w http.ResponseWriter, r *http.Request) { + e.handler.ServeHTTP(w, r) +} + +func labelsKeys(kvs []core.KeyValue) []string { + keys := make([]string, 0, len(kvs)) + for _, kv := range kvs { + keys = append(keys, sanitize(string(kv.Key))) + } + return keys +} + +func labelValues(labels export.Labels) []string { + // TODO(paivagustavo): parse the labels.Encoded() instead of calling `Emit()` directly + // this would avoid unnecessary allocations. + values := make([]string, 0, labels.Len()) + for _, label := range labels.Ordered() { + values = append(values, label.Value.Emit()) + } + return values +} diff --git a/exporter/metric/prometheus/prometheus_test.go b/exporter/metric/prometheus/prometheus_test.go new file mode 100644 index 000000000..1cbd252d1 --- /dev/null +++ b/exporter/metric/prometheus/prometheus_test.go @@ -0,0 +1,148 @@ +package prometheus_test + +import ( + "context" + "log" + "net/http/httptest" + "sort" + "strings" + "testing" + + "github.com/stretchr/testify/require" + + "go.opentelemetry.io/otel/api/core" + "go.opentelemetry.io/otel/api/key" + "go.opentelemetry.io/otel/exporter/metric/prometheus" + "go.opentelemetry.io/otel/exporter/metric/test" + export "go.opentelemetry.io/otel/sdk/export/metric" + "go.opentelemetry.io/otel/sdk/metric" +) + +func TestPrometheusExporter(t *testing.T) { + exporter, err := prometheus.NewExporter(prometheus.Options{ + DefaultHistogramBuckets: []float64{0., 10., 15., 20.}, + }) + if err != nil { + log.Panicf("failed to initialize metric stdout exporter %v", err) + } + + var expected []string + checkpointSet := test.NewCheckpointSet(metric.NewDefaultLabelEncoder()) + + counter := export.NewDescriptor( + "counter", export.CounterKind, nil, "", "", core.Float64NumberKind, false) + gauge := export.NewDescriptor( + "gauge", export.GaugeKind, nil, "", "", core.Float64NumberKind, false) + measure := export.NewDescriptor( + "measure", export.MeasureKind, nil, "", "", core.Float64NumberKind, false) + + labels := []core.KeyValue{ + key.New("A").String("B"), + key.New("C").String("D"), + } + + checkpointSet.AddCounter(counter, 15.3, labels...) + expected = append(expected, `counter{A="B",C="D"} 15.3`) + + checkpointSet.AddGauge(gauge, 13.2, labels...) + expected = append(expected, `gauge{A="B",C="D"} 13.2`) + + checkpointSet.AddMeasure(measure, 13, labels...) + checkpointSet.AddMeasure(measure, 15, labels...) + checkpointSet.AddMeasure(measure, 17, labels...) + expected = append(expected, `measure_bucket{A="B",C="D",le="0"} 0`) + expected = append(expected, `measure_bucket{A="B",C="D",le="10"} 0`) + expected = append(expected, `measure_bucket{A="B",C="D",le="15"} 2`) + expected = append(expected, `measure_bucket{A="B",C="D",le="20"} 3`) + expected = append(expected, `measure_bucket{A="B",C="D",le="+Inf"} 3`) + expected = append(expected, `measure_sum{A="B",C="D"} 45`) + expected = append(expected, `measure_count{A="B",C="D"} 3`) + + missingLabels := []core.KeyValue{ + key.New("A").String("E"), + key.New("C").String(""), + } + + checkpointSet.AddCounter(counter, 12, missingLabels...) + expected = append(expected, `counter{A="E",C=""} 12`) + + checkpointSet.AddGauge(gauge, 32, missingLabels...) + expected = append(expected, `gauge{A="E",C=""} 32`) + + checkpointSet.AddMeasure(measure, 19, missingLabels...) + expected = append(expected, `measure_bucket{A="E",C="",le="+Inf"} 1`) + expected = append(expected, `measure_bucket{A="E",C="",le="0"} 0`) + expected = append(expected, `measure_bucket{A="E",C="",le="10"} 0`) + expected = append(expected, `measure_bucket{A="E",C="",le="15"} 0`) + expected = append(expected, `measure_bucket{A="E",C="",le="20"} 1`) + expected = append(expected, `measure_count{A="E",C=""} 1`) + expected = append(expected, `measure_sum{A="E",C=""} 19`) + + compareExport(t, exporter, checkpointSet, expected) +} + +func TestPrometheusExporter_Summaries(t *testing.T) { + exporter, err := prometheus.NewExporter(prometheus.Options{ + MeasureAggregation: prometheus.Summary, + }) + if err != nil { + log.Panicf("failed to initialize metric stdout exporter %v", err) + } + + var expected []string + checkpointSet := test.NewCheckpointSet(metric.NewDefaultLabelEncoder()) + + measure := export.NewDescriptor( + "measure", export.MeasureKind, nil, "", "", core.Float64NumberKind, false) + + labels := []core.KeyValue{ + key.New("A").String("B"), + key.New("C").String("D"), + } + + checkpointSet.AddMeasure(measure, 13, labels...) + checkpointSet.AddMeasure(measure, 15, labels...) + checkpointSet.AddMeasure(measure, 17, labels...) + expected = append(expected, `measure_count{A="B",C="D"} 3`) + expected = append(expected, `measure_sum{A="B",C="D"} 45`) + expected = append(expected, `measure{A="B",C="D",quantile="0.5"} 15`) + expected = append(expected, `measure{A="B",C="D",quantile="0.9"} 17`) + expected = append(expected, `measure{A="B",C="D",quantile="0.99"} 17`) + + missingLabels := []core.KeyValue{ + key.New("A").String("E"), + key.New("C").String(""), + } + + checkpointSet.AddMeasure(measure, 19, missingLabels...) + expected = append(expected, `measure{A="E",C="",quantile="0.5"} 19`) + expected = append(expected, `measure{A="E",C="",quantile="0.9"} 19`) + expected = append(expected, `measure{A="E",C="",quantile="0.99"} 19`) + expected = append(expected, `measure_count{A="E",C=""} 1`) + expected = append(expected, `measure_sum{A="E",C=""} 19`) + + compareExport(t, exporter, checkpointSet, expected) +} + +func compareExport(t *testing.T, exporter *prometheus.Exporter, checkpointSet *test.CheckpointSet, expected []string) { + err := exporter.Export(context.Background(), checkpointSet) + require.Nil(t, err) + + rec := httptest.NewRecorder() + req := httptest.NewRequest("GET", "/metrics", nil) + exporter.ServeHTTP(rec, req) + + output := rec.Body.String() + lines := strings.Split(output, "\n") + var metricsOnly []string + for _, line := range lines { + if !strings.HasPrefix(line, "#") && line != "" { + metricsOnly = append(metricsOnly, line) + } + } + + sort.Strings(metricsOnly) + sort.Strings(expected) + + require.Equal(t, strings.Join(expected, "\n"), strings.Join(metricsOnly, "\n")) +} diff --git a/exporter/metric/prometheus/sanitize.go b/exporter/metric/prometheus/sanitize.go new file mode 100644 index 000000000..8e5c1647e --- /dev/null +++ b/exporter/metric/prometheus/sanitize.go @@ -0,0 +1,50 @@ +// Copyright 2019, OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "strings" + "unicode" +) + +// TODO(paivagustavo): we should provide a more uniform and controlled way of sanitizing. +// Letting users define wether we should try or not to sanitize metric names. +// This is a copy of sdk/internal/sanitize.go + +// sanitize returns a string that is truncated to 100 characters if it's too +// long, and replaces non-alphanumeric characters to underscores. +func sanitize(s string) string { + if len(s) == 0 { + return s + } + // TODO(paivagustavo): change this to use a bytes buffer to avoid a large number of string allocations. + s = strings.Map(sanitizeRune, s) + if unicode.IsDigit(rune(s[0])) { + s = "key_" + s + } + if s[0] == '_' { + s = "key" + s + } + return s +} + +// converts anything that is not a letter or digit to an underscore +func sanitizeRune(r rune) rune { + if unicode.IsLetter(r) || unicode.IsDigit(r) { + return r + } + // Everything else turns into an underscore + return '_' +} diff --git a/exporter/metric/prometheus/sanitize_test.go b/exporter/metric/prometheus/sanitize_test.go new file mode 100644 index 000000000..fec01dbda --- /dev/null +++ b/exporter/metric/prometheus/sanitize_test.go @@ -0,0 +1,61 @@ +// Copyright 2019, OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "testing" +) + +func TestSanitize(t *testing.T) { + tests := []struct { + name string + input string + want string + }{ + { + name: "replace character", + input: "test/key-1", + want: "test_key_1", + }, + { + name: "add prefix if starting with digit", + input: "0123456789", + want: "key_0123456789", + }, + { + name: "add prefix if starting with _", + input: "_0123456789", + want: "key_0123456789", + }, + { + name: "starts with _ after sanitization", + input: "/0123456789", + want: "key_0123456789", + }, + { + name: "valid input", + input: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_0123456789", + want: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_0123456789", + }, + } + + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + if got, want := sanitize(tt.input), tt.want; got != want { + t.Errorf("sanitize() = %q; want %q", got, want) + } + }) + } +} diff --git a/exporter/metric/prometheus/summary.go b/exporter/metric/prometheus/summary.go new file mode 100644 index 000000000..7eed2f40c --- /dev/null +++ b/exporter/metric/prometheus/summary.go @@ -0,0 +1,98 @@ +// Copyright 2019, OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package prometheus + +import ( + "github.com/prometheus/client_golang/prometheus" + + export "go.opentelemetry.io/otel/sdk/export/metric" + "go.opentelemetry.io/otel/sdk/export/metric/aggregator" +) + +type summaries struct { + defaultSummaryObjectives map[float64]float64 + registerer prometheus.Registerer + summary map[metricKey]prometheus.Observer + summaryVec map[*export.Descriptor]*prometheus.SummaryVec +} + +func newSummaries(registerer prometheus.Registerer, defaultSummaryObjectives map[float64]float64) summaries { + return summaries{ + registerer: registerer, + summary: make(map[metricKey]prometheus.Observer), + summaryVec: make(map[*export.Descriptor]*prometheus.SummaryVec), + defaultSummaryObjectives: defaultSummaryObjectives, + } +} + +func (su *summaries) export(points aggregator.Points, record export.Record, mKey metricKey) error { + values, err := points.Points() + if err != nil { + return err + } + + obs, err := su.getSummary(record, mKey) + if err != nil { + return err + } + + desc := record.Descriptor() + for _, v := range values { + obs.Observe(v.CoerceToFloat64(desc.NumberKind())) + } + return nil +} + +func (su *summaries) getSummary(record export.Record, mKey metricKey) (prometheus.Observer, error) { + if c, ok := su.summary[mKey]; ok { + return c, nil + } + + desc := record.Descriptor() + histogramVec, err := su.getSummaryVec(desc, record.Labels()) + if err != nil { + return nil, err + } + + obs, err := histogramVec.GetMetricWithLabelValues(labelValues(record.Labels())...) + if err != nil { + return nil, err + } + + su.summary[mKey] = obs + return obs, nil +} + +func (su *summaries) getSummaryVec(desc *export.Descriptor, labels export.Labels) (*prometheus.SummaryVec, error) { + if gv, ok := su.summaryVec[desc]; ok { + return gv, nil + } + + g := prometheus.NewSummaryVec( + prometheus.SummaryOpts{ + Name: sanitize(desc.Name()), + Help: desc.Description(), + Objectives: su.defaultSummaryObjectives, + }, + labelsKeys(labels.Ordered()), + ) + + if err := su.registerer.Register(g); err != nil { + return nil, err + } + + su.summaryVec[desc] = g + return g, nil +} diff --git a/exporter/metric/test/test.go b/exporter/metric/test/test.go index 387be0854..7424fdf43 100644 --- a/exporter/metric/test/test.go +++ b/exporter/metric/test/test.go @@ -1,8 +1,13 @@ package test import ( + "context" + "go.opentelemetry.io/otel/api/core" export "go.opentelemetry.io/otel/sdk/export/metric" + "go.opentelemetry.io/otel/sdk/metric/aggregator/array" + "go.opentelemetry.io/otel/sdk/metric/aggregator/counter" + "go.opentelemetry.io/otel/sdk/metric/aggregator/gauge" ) type CheckpointSet struct { @@ -27,6 +32,37 @@ func (p *CheckpointSet) Add(desc *export.Descriptor, agg export.Aggregator, labe p.updates = append(p.updates, export.NewRecord(desc, elabels, agg)) } +func createNumber(desc *export.Descriptor, v float64) core.Number { + if desc.NumberKind() == core.Float64NumberKind { + return core.NewFloat64Number(v) + } + return core.NewInt64Number(int64(v)) +} + +func (p *CheckpointSet) AddGauge(desc *export.Descriptor, v float64, labels ...core.KeyValue) { + ctx := context.Background() + gagg := gauge.New() + _ = gagg.Update(ctx, createNumber(desc, v), desc) + gagg.Checkpoint(ctx, desc) + p.Add(desc, gagg, labels...) +} + +func (p *CheckpointSet) AddCounter(desc *export.Descriptor, v float64, labels ...core.KeyValue) { + ctx := context.Background() + cagg := counter.New() + _ = cagg.Update(ctx, createNumber(desc, v), desc) + cagg.Checkpoint(ctx, desc) + p.Add(desc, cagg, labels...) +} + +func (p *CheckpointSet) AddMeasure(desc *export.Descriptor, v float64, labels ...core.KeyValue) { + ctx := context.Background() + magg := array.New() + _ = magg.Update(ctx, createNumber(desc, v), desc) + magg.Checkpoint(ctx, desc) + p.Add(desc, magg, labels...) +} + func (p *CheckpointSet) ForEach(f func(export.Record)) { for _, r := range p.updates { f(r) diff --git a/exporter/trace/jaeger/go.sum b/exporter/trace/jaeger/go.sum index 7972d7be2..e6323aab2 100644 --- a/exporter/trace/jaeger/go.sum +++ b/exporter/trace/jaeger/go.sum @@ -303,8 +303,8 @@ google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoA google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb h1:KyQ8P4ITs8M0jBWofeXBAlng8kJVbXKyliNX5w2w/ng= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= +google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03 h1:4HYDjxeNXAOTv3o1N2tjo8UUSlhQgAD52FVkwxnWgM8= +google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38= google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= diff --git a/exporter/trace/stackdriver/go.sum b/exporter/trace/stackdriver/go.sum index e546f288f..4f8cc4681 100644 --- a/exporter/trace/stackdriver/go.sum +++ b/exporter/trace/stackdriver/go.sum @@ -356,7 +356,6 @@ google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRn google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc= google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc= google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03 h1:4HYDjxeNXAOTv3o1N2tjo8UUSlhQgAD52FVkwxnWgM8= google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= diff --git a/go.mod b/go.mod index 91920154d..7e86c814e 100644 --- a/go.mod +++ b/go.mod @@ -25,7 +25,7 @@ require ( github.com/uudashr/gocognit v1.0.0 // indirect golang.org/x/sys v0.0.0-20191010194322-b09406accb47 // indirect golang.org/x/tools v0.0.0-20191025174333-e96d959c4788 - google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb // indirect + google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03 // indirect google.golang.org/grpc v1.24.0 mvdan.cc/unparam v0.0.0-20190917161559-b83a221c10a2 // indirect sourcegraph.com/sqs/pbtypes v1.0.0 // indirect diff --git a/go.sum b/go.sum index bd06911d7..1af693095 100644 --- a/go.sum +++ b/go.sum @@ -13,6 +13,7 @@ github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5 github.com/benbjohnson/clock v1.0.0 h1:78Jk/r6m4wCi6sndMpty7A//t4dw/RW5fV4ZgDVfX1w= github.com/benbjohnson/clock v1.0.0/go.mod h1:bGMdMPoPVvcYyt1gHDf4J2KE153Yf9BuiUKYMaxlTDM= github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q= +github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0= github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8= github.com/bombsimon/wsl v1.2.5 h1:9gTOkIwVtoDZywvX802SDHokeX4kW1cKnV8ZTVAPkRs= github.com/bombsimon/wsl v1.2.5/go.mod h1:43lEF/i0kpXbLCeDXL9LMT8c92HyBywXb0AsgMHYngM= @@ -175,6 +176,7 @@ github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hd github.com/mattn/go-isatty v0.0.10 h1:qxFzApOv4WsAL965uUPIsXzAKCZxN2p9UqdhFS4ZW10= github.com/mattn/go-isatty v0.0.10/go.mod h1:qgIWMr58cqv1PHHyhnkY9lrL7etaEgOFcMEpPG5Rm84= github.com/mattn/goveralls v0.0.2/go.mod h1:8d1ZMHsd7fW6IRPKQh46F2WRpyib5/X4FOpevwGNQEw= +github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0jegS5sx/RkqARlsWZ6pIwiU= github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0= github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y= github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0= @@ -203,12 +205,16 @@ github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw= +github.com/prometheus/client_golang v0.9.3 h1:9iH4JKXLzFbOAdtqv/a+j8aewx2Y8lAjAydhbaScPF8= github.com/prometheus/client_golang v0.9.3/go.mod h1:/TN21ttK/J9q6uSwhBd54HahCDft0ttaMvbicHlPoso= github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo= +github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90 h1:S/YWwWx/RA8rT8tKFRuGUZhuA90OyIBpPCXkcbwU8DE= github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA= github.com/prometheus/common v0.0.0-20181113130724-41aa239b4cce/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro= +github.com/prometheus/common v0.4.0 h1:7etb9YClo3a6HjLzfl6rIQaU+FDfi0VSX39io3aQ+DM= github.com/prometheus/common v0.4.0/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4= github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk= +github.com/prometheus/procfs v0.0.0-20190507164030-5867b95ac084 h1:sofwID9zm4tzrgykg80hfFph1mryUeLRsUfoocVVmRY= github.com/prometheus/procfs v0.0.0-20190507164030-5867b95ac084/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA= github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU= github.com/quasilyte/go-consistent v0.0.0-20190521200055-c6f3937de18c/go.mod h1:5STLWrekHfjyYwxBRVRXNOSewLJ3PWfDJd1VyTS21fI= @@ -353,8 +359,8 @@ golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8T google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM= google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4= google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb h1:KyQ8P4ITs8M0jBWofeXBAlng8kJVbXKyliNX5w2w/ng= -google.golang.org/genproto v0.0.0-20190925194540-b8fbc687dcfb/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8= +google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03 h1:4HYDjxeNXAOTv3o1N2tjo8UUSlhQgAD52FVkwxnWgM8= +google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= google.golang.org/grpc v1.24.0 h1:vb/1TCsVn3DcJlQ0Gs1yB1pKI6Do2/QNwxdKqmc/b0s= diff --git a/sdk/metric/aggregator/array/array_test.go b/sdk/metric/aggregator/array/array_test.go index bbb56d985..a63b995cc 100644 --- a/sdk/metric/aggregator/array/array_test.go +++ b/sdk/metric/aggregator/array/array_test.go @@ -305,6 +305,13 @@ func TestArrayFloat64(t *testing.T) { qx, err := agg.Quantile(0.5) require.Nil(t, err) require.Equal(t, all.Median(), qx, "Same median") + + po, err := agg.Points() + require.Nil(t, err) + require.Equal(t, all.Len(), len(po), "Points() must have same length of updates") + for i := 0; i < len(po); i++ { + require.Equal(t, all.Points()[i], po[i], "Wrong point at position %d", i) + } }) } } diff --git a/sdk/metric/aggregator/test/test.go b/sdk/metric/aggregator/test/test.go index b1cb2025a..3bd484c81 100644 --- a/sdk/metric/aggregator/test/test.go +++ b/sdk/metric/aggregator/test/test.go @@ -124,6 +124,10 @@ func (n *Numbers) Median() core.Number { return n.numbers[len(n.numbers)/2] } +func (n *Numbers) Points() []core.Number { + return n.numbers +} + // Performs the same range test the SDK does on behalf of the aggregator. func CheckedUpdate(t *testing.T, agg export.Aggregator, number core.Number, descriptor *export.Descriptor) { ctx := context.Background()