Add prometheus bridge #4227
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| Original file line number | Diff line number | Diff line change |
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| # Prometheus Bridge | ||
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| Status: Experimental | ||
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| The Prometheus Bridge allows using the Prometheus Golang client library | ||
| (github.com/prometheus/client_golang) with the OpenTelemetry SDK. | ||
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| ## Usage | ||
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| ```golang | ||
| // Make a Promethes bridge "Metric Producer" that adds metrics from the | ||
| // Prometheus DefaultGatherer. Add the WithGatherer(registry) option to add | ||
| // metrics from other registries. | ||
| bridge := prometheus.NewMetricProducer() | ||
| // Make a Periodic Reader to periodically gather metrics from the bridge, and | ||
| // push to an OpenTelemetry exporter. | ||
| reader := metric.NewPeriodicReader(otelExporter, metric.WithProducer(bridge)) | ||
| // Create an OTel MeterProvider with our reader. Metrics from OpenTelemetry | ||
| // instruments are combined with metrics from Prometheus instruments in | ||
| // exported batches of metrics. | ||
| mp := metric.NewMeterProvider(metric.WithReader(reader)) | ||
| ``` | ||
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There was a problem hiding this comment. We can make a "testable example" in |
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| ## Limitations | ||
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| * Summary metrics are dropped by the bridge. | ||
| * Start times for histograms and counters are set to the process start time. | ||
| * It does not currently support exponential histograms. | ||
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| // Copyright The 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. | ||
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| package prometheus // import "go.opentelemetry.io/contrib/bridges/prometheus" | ||
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| import ( | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
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| // config contains options for the producer. | ||
| type config struct { | ||
| gatherers []prometheus.Gatherer | ||
| } | ||
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| // newConfig creates a validated config configured with options. | ||
| func newConfig(opts ...Option) config { | ||
| cfg := config{} | ||
| for _, opt := range opts { | ||
| cfg = opt.apply(cfg) | ||
| } | ||
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| if len(cfg.gatherers) == 0 { | ||
| cfg.gatherers = []prometheus.Gatherer{prometheus.DefaultGatherer} | ||
| } | ||
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| return cfg | ||
| } | ||
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| // Option sets producer option values. | ||
| type Option interface { | ||
| apply(config) config | ||
| } | ||
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| type optionFunc func(config) config | ||
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| func (fn optionFunc) apply(cfg config) config { | ||
| return fn(cfg) | ||
| } | ||
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| // WithGatherer configures which prometheus Gatherer the Bridge will gather | ||
| // from. If no registerer is used the prometheus DefaultGatherer is used. | ||
| func WithGatherer(gatherer prometheus.Gatherer) Option { | ||
| return optionFunc(func(cfg config) config { | ||
| cfg.gatherers = append(cfg.gatherers, gatherer) | ||
| return cfg | ||
| }) | ||
| } |
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| // Copyright The 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. | ||
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| package prometheus // import "go.opentelemetry.io/contrib/bridges/prometheus" | ||
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| import ( | ||
| "testing" | ||
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| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
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| func TestNewConfig(t *testing.T) { | ||
| otherRegistry := prometheus.NewRegistry() | ||
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| testCases := []struct { | ||
| name string | ||
| options []Option | ||
| wantConfig config | ||
| }{ | ||
| { | ||
| name: "Default", | ||
| options: nil, | ||
| wantConfig: config{ | ||
| gatherers: []prometheus.Gatherer{prometheus.DefaultGatherer}, | ||
| }, | ||
| }, | ||
| { | ||
| name: "With a different gatherer", | ||
| options: []Option{WithGatherer(otherRegistry)}, | ||
| wantConfig: config{ | ||
| gatherers: []prometheus.Gatherer{otherRegistry}, | ||
| }, | ||
| }, | ||
| { | ||
| name: "Multiple gatherers", | ||
| options: []Option{WithGatherer(otherRegistry), WithGatherer(prometheus.DefaultGatherer)}, | ||
| wantConfig: config{ | ||
| gatherers: []prometheus.Gatherer{otherRegistry, prometheus.DefaultGatherer}, | ||
| }, | ||
| }, | ||
| } | ||
| for _, tt := range testCases { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| cfg := newConfig(tt.options...) | ||
| assert.Equal(t, tt.wantConfig, cfg) | ||
| }) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| // Copyright The 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. | ||
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| // Package prometheus provides a bridge from Prometheus to OpenTelemetry. | ||
| package prometheus // import "go.opentelemetry.io/contrib/bridges/prometheus" |
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| module go.opentelemetry.io/contrib/bridges/prometheus | ||
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| go 1.19 | ||
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| require ( | ||
| github.com/prometheus/client_golang v1.16.0 | ||
| github.com/prometheus/client_model v0.4.1-0.20230719122841-95a0733b38a0 | ||
| github.com/stretchr/testify v1.8.4 | ||
| go.opentelemetry.io/otel v1.16.0 | ||
| go.opentelemetry.io/otel/sdk v1.16.0 | ||
| go.opentelemetry.io/otel/sdk/metric v0.39.0 | ||
| ) | ||
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| require ( | ||
| github.com/beorn7/perks v1.0.1 // indirect | ||
| github.com/cespare/xxhash/v2 v2.2.0 // indirect | ||
| github.com/davecgh/go-spew v1.1.1 // indirect | ||
| github.com/go-logr/logr v1.2.4 // indirect | ||
| github.com/go-logr/stdr v1.2.2 // indirect | ||
| github.com/golang/protobuf v1.5.3 // indirect | ||
| github.com/kr/text v0.2.0 // indirect | ||
| github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect | ||
| github.com/pmezard/go-difflib v1.0.0 // indirect | ||
| github.com/prometheus/common v0.42.0 // indirect | ||
| github.com/prometheus/procfs v0.10.1 // indirect | ||
| github.com/rogpeppe/go-internal v1.11.0 // indirect | ||
| go.opentelemetry.io/otel/metric v1.16.0 // indirect | ||
| go.opentelemetry.io/otel/trace v1.16.0 // indirect | ||
| golang.org/x/sys v0.10.0 // indirect | ||
| google.golang.org/protobuf v1.30.0 // indirect | ||
| gopkg.in/yaml.v3 v3.0.1 // indirect | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM= | ||
| github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw= | ||
| github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44= | ||
| github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= | ||
| github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= | ||
| github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= | ||
| github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= | ||
| github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A= | ||
| github.com/go-logr/logr v1.2.4 h1:g01GSCwiDw2xSZfjJ2/T9M+S6pFdcNtFYsp+Y43HYDQ= | ||
| github.com/go-logr/logr v1.2.4/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A= | ||
| github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag= | ||
| github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE= | ||
| github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U= | ||
| github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk= | ||
| github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg= | ||
| github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY= | ||
| github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= | ||
| github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38= | ||
| github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE= | ||
| github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY= | ||
| github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE= | ||
| github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo= | ||
| github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4= | ||
| 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 v1.16.0 h1:yk/hx9hDbrGHovbci4BY+pRMfSuuat626eFsHb7tmT8= | ||
| github.com/prometheus/client_golang v1.16.0/go.mod h1:Zsulrv/L9oM40tJ7T815tM89lFEugiJ9HzIqaAx4LKc= | ||
| github.com/prometheus/client_model v0.4.1-0.20230719122841-95a0733b38a0 h1:0+/NUBQSANv2NUdj4G9gW+2gy10v89mZB5WMa9/fWPs= | ||
| github.com/prometheus/client_model v0.4.1-0.20230719122841-95a0733b38a0/go.mod h1:oMQmHW1/JoDwqLtg57MGgP/Fb1CJEYF2imWWhWtMkYU= | ||
| github.com/prometheus/common v0.42.0 h1:EKsfXEYo4JpWMHH5cg+KOUWeuJSov1Id8zGR8eeI1YM= | ||
| github.com/prometheus/common v0.42.0/go.mod h1:xBwqVerjNdUDjgODMpudtOMwlOwf2SaTr1yjz4b7Zbc= | ||
| github.com/prometheus/procfs v0.10.1 h1:kYK1Va/YMlutzCGazswoHKo//tZVlFpKYh+PymziUAg= | ||
| github.com/prometheus/procfs v0.10.1/go.mod h1:nwNm2aOCAYw8uTR/9bWRREkZFxAUcWzPHWJq+XBB/FM= | ||
| github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDNXVBh4M= | ||
| github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA= | ||
| github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk= | ||
| github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo= | ||
| go.opentelemetry.io/otel v1.16.0 h1:Z7GVAX/UkAXPKsy94IU+i6thsQS4nb7LviLpnaNeW8s= | ||
| go.opentelemetry.io/otel v1.16.0/go.mod h1:vl0h9NUa1D5s1nv3A5vZOYWn8av4K8Ml6JDeHrT/bx4= | ||
| go.opentelemetry.io/otel/metric v1.16.0 h1:RbrpwVG1Hfv85LgnZ7+txXioPDoh6EdbZHo26Q3hqOo= | ||
| go.opentelemetry.io/otel/metric v1.16.0/go.mod h1:QE47cpOmkwipPiefDwo2wDzwJrlfxxNYodqc4xnGCo4= | ||
| go.opentelemetry.io/otel/sdk v1.16.0 h1:Z1Ok1YsijYL0CSJpHt4cS3wDDh7p572grzNrBMiMWgE= | ||
| go.opentelemetry.io/otel/sdk v1.16.0/go.mod h1:tMsIuKXuuIWPBAOrH+eHtvhTL+SntFtXF9QD68aP6p4= | ||
| go.opentelemetry.io/otel/sdk/metric v0.39.0 h1:Kun8i1eYf48kHH83RucG93ffz0zGV1sh46FAScOTuDI= | ||
| go.opentelemetry.io/otel/sdk/metric v0.39.0/go.mod h1:piDIRgjcK7u0HCL5pCA4e74qpK/jk3NiUoAHATVAmiI= | ||
| go.opentelemetry.io/otel/trace v1.16.0 h1:8JRpaObFoW0pxuVPapkgH8UhHQj+bJW8jJsCZEu5MQs= | ||
| go.opentelemetry.io/otel/trace v1.16.0/go.mod h1:Yt9vYq1SdNz3xdjZZK7wcXv1qv2pwLkqr2QVwea0ef0= | ||
| golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= | ||
| golang.org/x/sys v0.10.0 h1:SqMFp9UcQJZa+pmYuAKjd9xq1f0j5rLcDIk0mj4qAsA= | ||
| golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= | ||
| golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= | ||
| google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw= | ||
| google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc= | ||
| google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng= | ||
| google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I= | ||
| gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= | ||
| gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk= | ||
| gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= | ||
| gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= |
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I think we can get rid of this file in favor of
doc.goandexample_test.go.