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Code Issues Releases Activity

Combine the Push and Pull metric controllers (#1378)

Browse Source 
* Push->basic

* Repackage

* Rename away from push

* Make exporter optional; export from a separate goroutine

* Move pull_test into controller_test

* Precommit pass

* New OTLP/Prom example

* Precommit

* Fix the example

* Shorten the example

* Test starting controller w/o exporter

* Test export timeout

* Remove ancient example & lint

* go.mod revert & tidy

* Comments

* Tidy a diff

* Tidy a diff

* Move export kind selector in the new example

* Split this test into its original parts

* Reduce diff size

* Changelog

* Remove extra Add/Done pair

* Remove unused stopCh param; document the Stop behavior

* Typo

* Use ctx

* Missed v0.15

* Apply PR feedback

* Precommit pass

* 0.14 -> 0.15 in new file

* Remove diff chunk markers

* Fix OTLP example

* Upstream

* dashpole comments

* aneurysm9 feedback

* Tidy go.sum
This commit is contained in:
Joshua MacDonald
2021-01-13 14:07:44 -08:00
committed by GitHub
parent 74deeddd26
commit dfece3d2b9
29 changed files with 1510 additions and 674 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
.github/dependabot.yml vendored
View File

@@ -48,7 +48,7 @@ updates:
interval: weekly
-
package-ecosystem: gomod
directory: /example/basic
directory: /example/prom-collector
labels:
- dependencies
- go

6
.gitignore vendored
View File

@@ -10,10 +10,14 @@ coverage.*
gen/
/example/basic/basic
/example/grpc/client/client
/example/grpc/server/server
/example/http/client/client
/example/http/server/server
/example/jaeger/jaeger
/example/namedtracer/namedtracer
/example/opencensus/opencensus
/example/prometheus/prometheus
/example/prom-collector/prom-collector
/example/zipkin/zipkin
/example/otel-collector/otel-collector

5
CHANGELOG.md
View File

@@ -36,6 +36,10 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
- `SamplingResult` now passed a `Tracestate` from the parent `SpanContext` (#1432)
- Moved gRPC driver for OTLP exporter to `exporters/otlp/otlpgrpc`. (#1420)
- The `TraceContext` propagator now correctly propagates `TraceState` through the `SpanContext`. (#1447)
- Metric Push and Pull Controller components are combined into a single "basic" Controller:
- `WithExporter()` and `Start()` to configure Push behavior
- `Start()` is optional; use `Collect()` and `ForEach()` for Pull behavior
- `Start()` and `Stop()` accept Context. (#1378)
### Removed
@@ -58,7 +62,6 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
- Bump `github.com/google/go-cmp` from 0.5.3 to 0.5.4 (#1374)
- Bump `github.com/golangci/golangci-lint` in `/internal/tools` (#1375)
### Fixed
- Metric SDK `SumObserver` and `UpDownSumObserver` instruments correctness fixes. (#1381)

15
example/basic/go.mod
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@@ -1,15 +0,0 @@
module go.opentelemetry.io/otel/example/basic
go 1.14
replace (
go.opentelemetry.io/otel => ../..
go.opentelemetry.io/otel/exporters/stdout => ../../exporters/stdout
go.opentelemetry.io/otel/sdk => ../../sdk
)
require (
go.opentelemetry.io/otel v0.15.0
go.opentelemetry.io/otel/exporters/stdout v0.15.0
go.opentelemetry.io/otel/sdk v0.15.0
)

17
example/basic/go.sum
View File

@@ -1,17 +0,0 @@
github.com/benbjohnson/clock v1.0.3 h1:vkLuvpK4fmtSCuo60+yC63p7y0BmQ8gm5ZXGuBCJyXg=
github.com/benbjohnson/clock v1.0.3/go.mod h1:bGMdMPoPVvcYyt1gHDf4J2KE153Yf9BuiUKYMaxlTDM=
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/google/go-cmp v0.5.4 h1:L8R9j+yAqZuZjsqh/z+F1NCffTKKLShY6zXTItVIZ8M=
github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

117
example/basic/main.go
View File

@@ -1,117 +0,0 @@
// 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.
package main
import (
"context"
"log"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/baggage"
"go.opentelemetry.io/otel/exporters/stdout"
"go.opentelemetry.io/otel/label"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/sdk/metric/controller/push"
"go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/selector/simple"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/trace"
)
var (
fooKey = label.Key("ex.com/foo")
barKey = label.Key("ex.com/bar")
lemonsKey = label.Key("ex.com/lemons")
anotherKey = label.Key("ex.com/another")
)
func main() {
exporter, err := stdout.NewExporter([]stdout.Option{
stdout.WithPrettyPrint(),
}...)
if err != nil {
log.Fatalf("failed to initialize stdout export pipeline: %v", err)
}
bsp := sdktrace.NewBatchSpanProcessor(exporter)
tp := sdktrace.NewTracerProvider(sdktrace.WithSpanProcessor(bsp))
defer func() { _ = tp.Shutdown(context.Background()) }()
pusher := push.New(
basic.New(
simple.NewWithExactDistribution(),
exporter,
),
exporter,
)
pusher.Start()
defer pusher.Stop()
otel.SetTracerProvider(tp)
otel.SetMeterProvider(pusher.MeterProvider())
// set global propagator to baggage (the default is no-op).
otel.SetTextMapPropagator(propagation.Baggage{})
tracer := otel.Tracer("ex.com/basic")
meter := otel.Meter("ex.com/basic")
commonLabels := []label.KeyValue{lemonsKey.Int(10), label.String("A", "1"), label.String("B", "2"), label.String("C", "3")}
oneMetricCB := func(_ context.Context, result metric.Float64ObserverResult) {
result.Observe(1, commonLabels...)
}
_ = metric.Must(meter).NewFloat64ValueObserver("ex.com.one", oneMetricCB,
metric.WithDescription("A ValueObserver set to 1.0"),
)
valuerecorderTwo := metric.Must(meter).NewFloat64ValueRecorder("ex.com.two")
ctx := context.Background()
ctx = baggage.ContextWithValues(ctx, fooKey.String("foo1"), barKey.String("bar1"))
valuerecorder := valuerecorderTwo.Bind(commonLabels...)
defer valuerecorder.Unbind()
err = func(ctx context.Context) error {
var span trace.Span
ctx, span = tracer.Start(ctx, "operation")
defer span.End()
span.AddEvent("Nice operation!", trace.WithAttributes(label.Int("bogons", 100)))
span.SetAttributes(anotherKey.String("yes"))
meter.RecordBatch(
// Note: call-site variables added as context Entries:
baggage.ContextWithValues(ctx, anotherKey.String("xyz")),
commonLabels,
valuerecorderTwo.Measurement(2.0),
)
return func(ctx context.Context) error {
var span trace.Span
ctx, span = tracer.Start(ctx, "Sub operation...")
defer span.End()
span.SetAttributes(lemonsKey.String("five"))
span.AddEvent("Sub span event")
valuerecorder.Record(ctx, 1.3)
return nil
}(ctx)
}(ctx)
if err != nil {
panic(err)
}
}

19
example/otel-collector/main.go
View File

@@ -31,8 +31,8 @@ import (
"go.opentelemetry.io/otel/label"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/sdk/metric/controller/push"
"go.opentelemetry.io/otel/sdk/metric/processor/basic"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/selector/simple"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
@@ -73,28 +73,27 @@ func initProvider() func() {
sdktrace.WithSpanProcessor(bsp),
)
pusher := push.New(
basic.New(
cont := controller.New(
processor.New(
simple.NewWithExactDistribution(),
exp,
),
exp,
push.WithPeriod(2*time.Second),
controller.WithPusher(exp),
controller.WithCollectPeriod(2*time.Second),
)
// set global propagator to tracecontext (the default is no-op).
otel.SetTextMapPropagator(propagation.TraceContext{})
otel.SetTracerProvider(tracerProvider)
otel.SetMeterProvider(pusher.MeterProvider())
pusher.Start()
otel.SetMeterProvider(cont.MeterProvider())
handleErr(cont.Start(context.Background()), "failed to start controller")
return func() {
// Shutdown will flush any remaining spans.
handleErr(tracerProvider.Shutdown(ctx), "failed to shutdown TracerProvider")
// Push any last metric events to the exporter.
pusher.Stop()
handleErr(exp.Shutdown(ctx), "failed to stop exporter")
handleErr(cont.Stop(context.Background()), "failed to stop controller")
}
}

3
example/prom-collector/README.md Normal file
View File

@@ -0,0 +1,3 @@
This example demonstrates a metrics export pipeline that supports
Prometheus (pull) and simultaneously exports OTLP to an OpenTelemetry
endpoint (push).

18
example/prom-collector/go.mod Normal file
View File

@@ -0,0 +1,18 @@
module go.opentelemetry.io/otel/example/prom-collector
go 1.14
replace (
go.opentelemetry.io/otel => ../..
go.opentelemetry.io/otel/exporters/metric/prometheus => ../../exporters/metric/prometheus
go.opentelemetry.io/otel/exporters/otlp => ../../exporters/otlp
go.opentelemetry.io/otel/sdk => ../../sdk
)
require (
go.opentelemetry.io/otel v0.15.0
go.opentelemetry.io/otel/exporters/metric/prometheus v0.15.0
go.opentelemetry.io/otel/exporters/otlp v0.15.0
go.opentelemetry.io/otel/sdk v0.15.0
google.golang.org/grpc v1.34.0
)

443
example/prom-collector/go.sum Normal file
View File

@@ -0,0 +1,443 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
github.com/VividCortex/gohistogram v1.0.0/go.mod h1:Pf5mBqqDxYaXu3hDrrU+w6nw50o/4+TcAqDqk/vUH7g=
github.com/afex/hystrix-go v0.0.0-20180502004556-fa1af6a1f4f5/go.mod h1:SkGFH1ia65gfNATL8TAiHDNxPzPdmEL5uirI2Uyuz6c=
github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
github.com/apache/thrift v0.13.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a/go.mod h1:DAHtR1m6lCRdSC2Tm3DSWRPvIPr6xNKyeHdqDQSQT+A=
github.com/aws/aws-lambda-go v1.13.3/go.mod h1:4UKl9IzQMoD+QF79YdCuzCwp8VbmG4VAQwij/eHl5CU=
github.com/aws/aws-sdk-go v1.27.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=
github.com/benbjohnson/clock v1.0.3 h1:vkLuvpK4fmtSCuo60+yC63p7y0BmQ8gm5ZXGuBCJyXg=
github.com/benbjohnson/clock v1.0.3/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/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
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/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
github.com/casbin/casbin/v2 v2.1.2/go.mod h1:YcPU1XXisHhLzuxH9coDNf2FbKpjGlbCg3n9yuLkIJQ=
github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/clbanning/x2j v0.0.0-20191024224557-825249438eec/go.mod h1:jMjuTZXRI4dUb/I5gc9Hdhagfvm9+RyrPryS/auMzxE=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
github.com/cncf/udpa/go v0.0.0-20200629203442-efcf912fb354/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:zn76sxSg3SzpJ0PPJaLDCu+Bu0Lg3sKTORVIj19EIF8=
github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
github.com/coreos/pkg v0.0.0-20160727233714-3ac0863d7acf/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5mFgVsvEsIPBvNs=
github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
github.com/envoyproxy/go-control-plane v0.6.9/go.mod h1:SBwIajubJHhxtWwsL9s8ss4safvEdbitLhGGK48rN6g=
github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
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gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=

123
example/prom-collector/main.go Normal file
View File

@@ -0,0 +1,123 @@
// 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.
package main
import (
"context"
"log"
"math/rand"
"net/http"
"time"
"google.golang.org/grpc"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/exporters/metric/prometheus"
"go.opentelemetry.io/otel/exporters/otlp"
"go.opentelemetry.io/otel/exporters/otlp/otlpgrpc"
"go.opentelemetry.io/otel/label"
"go.opentelemetry.io/otel/metric"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/selector/simple"
"go.opentelemetry.io/otel/sdk/resource"
)
func initMeter() {
ctx := context.Background()
res, err := resource.New(
ctx,
resource.WithAttributes(label.String("R", "V")),
)
if err != nil {
log.Fatal("could not initialize resource:", err)
}
driver := otlpgrpc.NewDriver(
otlpgrpc.WithInsecure(),
otlpgrpc.WithEndpoint("localhost:30080"),
otlpgrpc.WithDialOption(grpc.WithBlock()), // useful for testing
)
otlpExporter, err := otlp.NewExporter(ctx, driver)
if err != nil {
log.Fatal("could not initialize OTLP:", err)
}
cont := controller.New(
processor.New(
simple.NewWithHistogramDistribution([]float64{
0.001, 0.01, 0.1, 1, 10, 100, 1000,
}),
otlpExporter, // otlpExporter is an ExportKindSelector
processor.WithMemory(true),
),
controller.WithResource(res),
controller.WithPusher(otlpExporter),
)
if err := cont.Start(context.Background()); err != nil {
log.Fatal("could not start controller:", err)
}
promExporter, err := prometheus.NewExporter(prometheus.Config{}, cont)
if err != nil {
log.Fatal("could not initialize prometheus:", err)
}
http.HandleFunc("/", promExporter.ServeHTTP)
go func() {
log.Fatal(http.ListenAndServe(":17000", nil))
}()
otel.SetMeterProvider(cont.MeterProvider())
log.Println("Prometheus server running on :17000")
log.Println("Exporting OTLP to :30080")
}
func main() {
initMeter()
labels := []label.KeyValue{
label.String("label1", "value1"),
}
meter := otel.Meter("ex.com/prom-collector")
_ = metric.Must(meter).NewFloat64ValueObserver(
"randval",
func(_ context.Context, result metric.Float64ObserverResult) {
result.Observe(
rand.Float64(),
labels...,
)
},
metric.WithDescription("A random value"),
)
temperature := metric.Must(meter).NewFloat64ValueRecorder("temperature")
interrupts := metric.Must(meter).NewInt64Counter("interrupts")
ctx := context.Background()
log.Println("Example is running, please visit :17000")
for {
temperature.Record(ctx, 100+10*rand.NormFloat64(), labels...)
interrupts.Add(ctx, int64(rand.Intn(100)), labels...)
time.Sleep(time.Second * time.Duration(rand.Intn(10)))
}
}

4
exporters/metric/prometheus/example_test.go
View File

@@ -25,7 +25,7 @@ import (
"go.opentelemetry.io/otel/exporters/metric/prometheus"
"go.opentelemetry.io/otel/label"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/sdk/metric/controller/pull"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
"go.opentelemetry.io/otel/sdk/resource"
)
@@ -50,7 +50,7 @@ func ExampleNewExportPipeline() {
// Create a meter
exporter, err := prometheus.NewExportPipeline(
prometheus.Config{},
pull.WithResource(res),
controller.WithResource(res),
)
if err != nil {
panic(err)

42
exporters/metric/prometheus/prometheus.go
View File

@@ -32,8 +32,8 @@ import (
"go.opentelemetry.io/otel/metric/number"
export "go.opentelemetry.io/otel/sdk/export/metric"
"go.opentelemetry.io/otel/sdk/export/metric/aggregation"
"go.opentelemetry.io/otel/sdk/metric/controller/pull"
"go.opentelemetry.io/otel/sdk/metric/processor/basic"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/selector/simple"
)
@@ -51,7 +51,7 @@ type Exporter struct {
// struct allows the exporter to potentially support multiple
// controllers (e.g., with different resources).
lock sync.RWMutex
controller *pull.Controller
controller *controller.Controller
defaultHistogramBoundaries []float64
}
@@ -87,9 +87,9 @@ type Config struct {
DefaultHistogramBoundaries []float64
}
// NewExportPipeline sets up a complete export pipeline with the recommended setup,
// using the recommended selector and standard processor. See the pull.Options.
func NewExportPipeline(config Config, options ...pull.Option) (*Exporter, error) {
// NewExporter returns a new Prometheus exporter using the configured
// metric controller. See controller.New().
func NewExporter(config Config, controller *controller.Controller) (*Exporter, error) {
if config.Registry == nil {
config.Registry = prometheus.NewRegistry()
}
@@ -106,20 +106,25 @@ func NewExportPipeline(config Config, options ...pull.Option) (*Exporter, error)
handler: promhttp.HandlerFor(config.Gatherer, promhttp.HandlerOpts{}),
registerer: config.Registerer,
gatherer: config.Gatherer,
controller: controller,
defaultHistogramBoundaries: config.DefaultHistogramBoundaries,
}
c := &collector{
exp: e,
}
e.SetController(config, options...)
if err := config.Registerer.Register(c); err != nil {
return nil, fmt.Errorf("cannot register the collector: %w", err)
}
return e, nil
}
// NewExportPipeline sets up a complete export pipeline with the recommended setup,
// using the recommended selector and standard processor. See the controller.Options.
func NewExportPipeline(config Config, options ...controller.Option) (*Exporter, error) {
return NewExporter(config, defaultController(config, options...))
}
// InstallNewPipeline instantiates a NewExportPipeline and registers it globally.
// Typically called as:
//
@@ -131,7 +136,7 @@ func NewExportPipeline(config Config, options ...pull.Option) (*Exporter, error)
// http.HandleFunc("/metrics", hf)
// defer pipeline.Stop()
// ... Done
func InstallNewPipeline(config Config, options ...pull.Option) (*Exporter, error) {
func InstallNewPipeline(config Config, options ...controller.Option) (*Exporter, error) {
exp, err := NewExportPipeline(config, options...)
if err != nil {
return nil, err
@@ -140,17 +145,14 @@ func InstallNewPipeline(config Config, options ...pull.Option) (*Exporter, error
return exp, nil
}
// SetController sets up a standard *pull.Controller as the metric provider
// for this exporter.
func (e *Exporter) SetController(config Config, options ...pull.Option) {
e.lock.Lock()
defer e.lock.Unlock()
e.controller = pull.New(
basic.New(
// defaultController returns a standard *controller.Controller for use
// with Prometheus.
func defaultController(config Config, options ...controller.Option) *controller.Controller {
return controller.New(
processor.New(
simple.NewWithHistogramDistribution(config.DefaultHistogramBoundaries),
e,
basic.WithMemory(true),
export.CumulativeExportKindSelector(),
processor.WithMemory(true),
),
options...,
)
@@ -162,7 +164,7 @@ func (e *Exporter) MeterProvider() metric.MeterProvider {
}
// Controller returns the controller object that coordinates collection for the SDK.
func (e *Exporter) Controller() *pull.Controller {
func (e *Exporter) Controller() *controller.Controller {
e.lock.RLock()
defer e.lock.RUnlock()
return e.controller

8
exporters/metric/prometheus/prometheus_test.go
View File

@@ -29,7 +29,7 @@ import (
"go.opentelemetry.io/otel/exporters/metric/prometheus"
"go.opentelemetry.io/otel/label"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/sdk/metric/controller/pull"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
"go.opentelemetry.io/otel/sdk/resource"
)
@@ -42,8 +42,8 @@ func TestPrometheusExporter(t *testing.T) {
prometheus.Config{
DefaultHistogramBoundaries: []float64{-0.5, 1},
},
pull.WithCachePeriod(0),
pull.WithResource(resource.NewWithAttributes(label.String("R", "V"))),
controller.WithCollectPeriod(0),
controller.WithResource(resource.NewWithAttributes(label.String("R", "V"))),
)
require.NoError(t, err)
@@ -116,7 +116,7 @@ func TestPrometheusStatefulness(t *testing.T) {
// Create a meter
exporter, err := prometheus.NewExportPipeline(
prometheus.Config{},
pull.WithCachePeriod(0),
controller.WithCollectPeriod(0),
)
require.NoError(t, err)

11
exporters/otlp/internal/otlptest/otlptest.go
View File

@@ -21,6 +21,7 @@ import (
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/otel/exporters/otlp"
commonpb "go.opentelemetry.io/otel/exporters/otlp/internal/opentelemetry-proto-gen/common/v1"
@@ -28,7 +29,7 @@ import (
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/number"
exportmetric "go.opentelemetry.io/otel/sdk/export/metric"
"go.opentelemetry.io/otel/sdk/metric/controller/push"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/selector/simple"
"go.opentelemetry.io/otel/sdk/resource"
@@ -75,10 +76,10 @@ func RunEndToEndTest(ctx context.Context, t *testing.T, exp *otlp.Exporter, mcTr
selector := simple.NewWithInexpensiveDistribution()
processor := processor.New(selector, exportmetric.StatelessExportKindSelector())
pusher := push.New(processor, exp)
pusher.Start()
cont := controller.New(processor, controller.WithPusher(exp))
require.NoError(t, cont.Start(ctx))
meter := pusher.MeterProvider().Meter("test-meter")
meter := cont.MeterProvider().Meter("test-meter")
labels := []label.KeyValue{label.Bool("test", true)}
type data struct {
@@ -137,7 +138,7 @@ func RunEndToEndTest(ctx context.Context, t *testing.T, exp *otlp.Exporter, mcTr
}
// Flush and close.
pusher.Stop()
require.NoError(t, cont.Stop(ctx))
func() {
ctx, cancel := context.WithTimeout(ctx, 10*time.Second)
defer cancel()

29
exporters/otlp/otlpgrpc/example_test.go
View File

@@ -26,8 +26,8 @@ import (
"go.opentelemetry.io/otel/exporters/otlp"
"go.opentelemetry.io/otel/exporters/otlp/otlpgrpc"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/sdk/metric/controller/push"
"go.opentelemetry.io/otel/sdk/metric/processor/basic"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/selector/simple"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
)
@@ -179,24 +179,33 @@ func Example_withDifferentSignalCollectors() {
}()
otel.SetTracerProvider(tp)
pusher := push.New(
basic.New(
pusher := controller.New(
processor.New(
simple.NewWithExactDistribution(),
exp,
),
exp,
push.WithPeriod(2*time.Second),
controller.WithPusher(exp),
controller.WithCollectPeriod(2*time.Second),
)
otel.SetMeterProvider(pusher.MeterProvider())
pusher.Start()
defer pusher.Stop() // pushes any last exports to the receiver
if err := pusher.Start(ctx); err != nil {
log.Fatalf("could not start metric controoler: %v", err)
}
defer func() {
ctx, cancel := context.WithTimeout(ctx, time.Second)
defer cancel()
// pushes any last exports to the receiver
if err := pusher.Stop(ctx); err != nil {
otel.Handle(err)
}
}()
tracer := otel.Tracer("test-tracer")
meter := otel.Meter("test-meter")
// Recorder metric example
valuerecorder := metric.Must(meter).
counter := metric.Must(meter).
NewFloat64Counter(
"an_important_metric",
metric.WithDescription("Measures the cumulative epicness of the app"),
@@ -210,7 +219,7 @@ func Example_withDifferentSignalCollectors() {
for i := 0; i < 10; i++ {
_, iSpan := tracer.Start(ctx, fmt.Sprintf("Sample-%d", i))
log.Printf("Doing really hard work (%d / 10)\n", i+1)
valuerecorder.Add(ctx, 1.0)
counter.Add(ctx, 1.0)
<-time.After(time.Second)
iSpan.End()

7
exporters/stdout/example_test.go
View File

@@ -84,8 +84,11 @@ func Example() {
if err != nil {
log.Fatal("Could not initialize stdout exporter:", err)
}
defer pusher.Stop()
ctx := context.Background()
log.Println("the answer is", add(ctx, multiply(ctx, multiply(ctx, 2, 2), 10), 2))
if err := pusher.Stop(ctx); err != nil {
log.Fatal("Could not stop stdout exporter:", err)
}
}

24
exporters/stdout/exporter.go
View File

@@ -15,11 +15,13 @@
package stdout // import "go.opentelemetry.io/otel/exporters/stdout"
import (
"context"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/sdk/export/metric"
exporttrace "go.opentelemetry.io/otel/sdk/export/trace"
"go.opentelemetry.io/otel/sdk/metric/controller/push"
"go.opentelemetry.io/otel/sdk/metric/processor/basic"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/selector/simple"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/trace"
@@ -50,24 +52,26 @@ func NewExporter(options ...Option) (*Exporter, error) {
// NewExportPipeline creates a complete export pipeline with the default
// selectors, processors, and trace registration. It is the responsibility
// of the caller to stop the returned push Controller.
func NewExportPipeline(exportOpts []Option, pushOpts []push.Option) (trace.TracerProvider, *push.Controller, error) {
func NewExportPipeline(exportOpts []Option, pushOpts []controller.Option) (trace.TracerProvider, *controller.Controller, error) {
exporter, err := NewExporter(exportOpts...)
if err != nil {
return nil, nil, err
}
tp := sdktrace.NewTracerProvider(sdktrace.WithBatcher(exporter))
pusher := push.New(
basic.New(
pusher := controller.New(
processor.New(
simple.NewWithInexpensiveDistribution(),
exporter,
),
exporter,
pushOpts...,
append(
pushOpts,
controller.WithPusher(exporter),
)...,
)
pusher.Start()
err = pusher.Start(context.Background())
return tp, pusher, nil
return tp, pusher, err
}
// InstallNewPipeline creates a complete export pipelines with defaults and
@@ -82,7 +86,7 @@ func NewExportPipeline(exportOpts []Option, pushOpts []push.Option) (trace.Trace
// }
// defer pipeline.Stop()
// ... Done
func InstallNewPipeline(exportOpts []Option, pushOpts []push.Option) (*push.Controller, error) {
func InstallNewPipeline(exportOpts []Option, pushOpts []controller.Option) (*controller.Controller, error) {
tracerProvider, controller, err := NewExportPipeline(exportOpts, pushOpts)
if err != nil {
return controller, err

120
sdk/metric/controller/basic/config.go Normal file
View File

@@ -0,0 +1,120 @@
// 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.
package basic // import "go.opentelemetry.io/otel/sdk/metric/controller/basic"
import (
"time"
export "go.opentelemetry.io/otel/sdk/export/metric"
"go.opentelemetry.io/otel/sdk/resource"
)
// Config contains configuration for a basic Controller.
type Config struct {
// Resource is the OpenTelemetry resource associated with all Meters
// created by the Controller.
Resource *resource.Resource
// CollectPeriod is the interval between calls to Collect a
// checkpoint.
//
// When pulling metrics and not exporting, this is the minimum
// time between calls to Collect. In a pull-only
// configuration, collection is performed on demand; set
// CollectPeriod to 0 always recompute the export record set.
//
// When exporting metrics, this must be > 0.
//
// Default value is 10s.
CollectPeriod time.Duration
// CollectTimeout is the timeout of the Context passed to
// Collect() and subsequently to Observer instrument callbacks.
//
// Default value is 10s. If zero, no Collect timeout is applied.
CollectTimeout time.Duration
// Pusher is used for exporting metric data.
//
// Note: Exporters such as Prometheus that pull data do not implement
// export.Exporter. These will directly call Collect() and ForEach().
Pusher export.Exporter
// PushTimeout is the timeout of the Context when a Pusher is configured.
//
// Default value is 10s. If zero, no Export timeout is applied.
PushTimeout time.Duration
}
// Option is the interface that applies the value to a configuration option.
type Option interface {
// Apply sets the Option value of a Config.
Apply(*Config)
}
// WithResource sets the Resource configuration option of a Config.
func WithResource(r *resource.Resource) Option {
return resourceOption{r}
}
type resourceOption struct{ *resource.Resource }
func (o resourceOption) Apply(config *Config) {
config.Resource = o.Resource
}
// WithCollectPeriod sets the CollectPeriod configuration option of a Config.
func WithCollectPeriod(period time.Duration) Option {
return collectPeriodOption(period)
}
type collectPeriodOption time.Duration
func (o collectPeriodOption) Apply(config *Config) {
config.CollectPeriod = time.Duration(o)
}
// WithCollectTimeout sets the CollectTimeout configuration option of a Config.
func WithCollectTimeout(timeout time.Duration) Option {
return collectTimeoutOption(timeout)
}
type collectTimeoutOption time.Duration
func (o collectTimeoutOption) Apply(config *Config) {
config.CollectTimeout = time.Duration(o)
}
// WithPusher sets the Pusher configuration option of a Config.
func WithPusher(pusher export.Exporter) Option {
return pusherOption{pusher}
}
type pusherOption struct{ pusher export.Exporter }
func (o pusherOption) Apply(config *Config) {
config.Pusher = o.pusher
}
// WithPushTimeout sets the PushTimeout configuration option of a Config.
func WithPushTimeout(timeout time.Duration) Option {
return pushTimeoutOption(timeout)
}
type pushTimeoutOption time.Duration
func (o pushTimeoutOption) Apply(config *Config) {
config.PushTimeout = time.Duration(o)
}

2
sdk/metric/controller/push/config_test.go → sdk/metric/controller/basic/config_test.go
View File

@@ -12,7 +12,7 @@
// See the License for the specific language governing permissions and
// limitations under the License.
package push
package basic
import (
"testing"

308
sdk/metric/controller/basic/controller.go Normal file
View File

@@ -0,0 +1,308 @@
// 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.
package basic // import "go.opentelemetry.io/otel/sdk/metric/controller/basic"
import (
"context"
"fmt"
"sync"
"time"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/registry"
export "go.opentelemetry.io/otel/sdk/export/metric"
sdk "go.opentelemetry.io/otel/sdk/metric"
controllerTime "go.opentelemetry.io/otel/sdk/metric/controller/time"
)
// DefaultPeriod is used for:
//
// - the minimum time between calls to Collect()
// - the timeout for Export()
// - the timeout for Collect().
const DefaultPeriod = 10 * time.Second
// ErrControllerStarted indicates that a controller was started more
// than once.
var ErrControllerStarted = fmt.Errorf("controller already started")
// Controller organizes and synchronizes collection of metric data in
// both "pull" and "push" configurations. This supports two distinct
// modes:
//
// - Push and Pull: Start() must be called to begin calling the pusher;
// Collect() is called periodically by a background thread after starting
// the controller.
// - Pull-Only: Start() is optional in this case, to call Collect periodically.
// If Start() is not called, Collect() can be called manually to initiate
// collection
//
// The controller supports mixing push and pull access to metric data
// using the export.CheckpointSet RWLock interface. Collection will
// be blocked by a pull request in the basic controller.
type Controller struct {
lock sync.Mutex
accumulator *sdk.Accumulator
provider *registry.MeterProvider
checkpointer export.Checkpointer
pusher export.Exporter
wg sync.WaitGroup
stopCh chan struct{}
clock controllerTime.Clock
ticker controllerTime.Ticker
collectPeriod time.Duration
collectTimeout time.Duration
pushTimeout time.Duration
// collectedTime is used only in configurations with no
// pusher, when ticker != nil.
collectedTime time.Time
}
// New constructs a Controller using the provided checkpointer and
// options (including optional Pusher) to configure a metric
// export pipeline.
func New(checkpointer export.Checkpointer, opts ...Option) *Controller {
c := &Config{
CollectPeriod: DefaultPeriod,
CollectTimeout: DefaultPeriod,
PushTimeout: DefaultPeriod,
}
for _, opt := range opts {
opt.Apply(c)
}
impl := sdk.NewAccumulator(
checkpointer,
c.Resource,
)
return &Controller{
provider: registry.NewMeterProvider(impl),
accumulator: impl,
checkpointer: checkpointer,
pusher: c.Pusher,
stopCh: nil,
clock: controllerTime.RealClock{},
collectPeriod: c.CollectPeriod,
collectTimeout: c.CollectTimeout,
pushTimeout: c.PushTimeout,
}
}
// SetClock supports setting a mock clock for testing. This must be
// called before Start().
func (c *Controller) SetClock(clock controllerTime.Clock) {
c.lock.Lock()
defer c.lock.Unlock()
c.clock = clock
}
// MeterProvider returns a MeterProvider instance for this controller.
func (c *Controller) MeterProvider() metric.MeterProvider {
return c.provider
}
// Start begins a ticker that periodically collects and exports
// metrics with the configured interval. This is required for calling
// a configured Exporter (see WithExporter) and is otherwise optional
// when only pulling metric data.
//
// The passed context is passed to Collect() and subsequently to
// asynchronous instrument callbacks. Returns an error when the
// controller was already started.
//
// Note that it is not necessary to Start a controller when only
// pulling data; use the Collect() and ForEach() methods directly in
// this case.
func (c *Controller) Start(ctx context.Context) error {
c.lock.Lock()
defer c.lock.Unlock()
if c.stopCh != nil {
return ErrControllerStarted
}
c.wg.Add(1)
c.stopCh = make(chan struct{})
c.ticker = c.clock.Ticker(c.collectPeriod)
go c.runTicker(ctx, c.stopCh)
return nil
}
// Stop waits for the background goroutine to return and then collects
// and exports metrics one last time before returning. The passed
// context is passed to the final Collect() and subsequently to the
// final asynchronous instruments.
//
// Note that Stop() will not cancel an ongoing collection or export.
func (c *Controller) Stop(ctx context.Context) error {
c.lock.Lock()
defer c.lock.Unlock()
if c.stopCh == nil {
return nil
}
close(c.stopCh)
c.stopCh = nil
c.wg.Wait()
c.ticker.Stop()
c.ticker = nil
return c.collect(ctx)
}
// runTicker collection on ticker events until the stop channel is closed.
func (c *Controller) runTicker(ctx context.Context, stopCh chan struct{}) {
defer c.wg.Done()
for {
select {
case <-stopCh:
return
case <-c.ticker.C():
if err := c.collect(ctx); err != nil {
otel.Handle(err)
}
}
}
}
// collect computes a checkpoint and optionally exports it.
func (c *Controller) collect(ctx context.Context) error {
if err := c.checkpoint(ctx, func() bool {
return true
}); err != nil {
return err
}
if c.pusher == nil {
return nil
}
// Note: this is not subject to collectTimeout. This blocks the next
// collection despite collectTimeout because it holds a lock.
if err := c.export(ctx); err != nil {
return err
}
return nil
}
// checkpoint calls the Accumulator and Checkpointer interfaces to
// compute the CheckpointSet. This applies the configured collection
// timeout. Note that this does not try to cancel a Collect or Export
// when Stop() is called.
func (c *Controller) checkpoint(ctx context.Context, cond func() bool) error {
ckpt := c.checkpointer.CheckpointSet()
ckpt.Lock()
defer ckpt.Unlock()
if !cond() {
return nil
}
c.checkpointer.StartCollection()
if c.collectTimeout > 0 {
var cancel context.CancelFunc
ctx, cancel = context.WithTimeout(ctx, c.collectTimeout)
defer cancel()
}
_ = c.accumulator.Collect(ctx)
var err error
select {
case <-ctx.Done():
err = ctx.Err()
default:
// The context wasn't done, ok.
}
// Finish the checkpoint whether the accumulator timed out or not.
if cerr := c.checkpointer.FinishCollection(); cerr != nil {
if err == nil {
err = cerr
} else {
err = fmt.Errorf("%s: %w", cerr.Error(), err)
}
}
return err
}
// export calls the exporter with a read lock on the CheckpointSet,
// applying the configured export timeout.
func (c *Controller) export(ctx context.Context) error {
ckpt := c.checkpointer.CheckpointSet()
ckpt.RLock()
defer ckpt.RUnlock()
if c.pushTimeout > 0 {
var cancel context.CancelFunc
ctx, cancel = context.WithTimeout(ctx, c.pushTimeout)
defer cancel()
}
return c.pusher.Export(ctx, ckpt)
}
// Foreach gives the caller read-locked access to the current
// export.CheckpointSet.
func (c *Controller) ForEach(ks export.ExportKindSelector, f func(export.Record) error) error {
ckpt := c.checkpointer.CheckpointSet()
ckpt.RLock()
defer ckpt.RUnlock()
return ckpt.ForEach(ks, f)
}
// IsRunning returns true if the controller was started via Start(),
// indicating that the current export.CheckpointSet is being kept
// up-to-date.
func (c *Controller) IsRunning() bool {
c.lock.Lock()
defer c.lock.Unlock()
return c.ticker != nil
}
// Collect requests a collection. The collection will be skipped if
// the last collection is aged less than the configured collection
// period.
func (c *Controller) Collect(ctx context.Context) error {
if c.IsRunning() {
// When there's a non-nil ticker, there's a goroutine
// computing checkpoints with the collection period.
return ErrControllerStarted
}
return c.checkpoint(ctx, c.shouldCollect)
}
// shouldCollect returns true if the collector should collect now,
// based on the timestamp, the last collection time, and the
// configured period.
func (c *Controller) shouldCollect() bool {
// This is called with the CheckpointSet exclusive
// lock held.
if c.collectPeriod == 0 {
return true
}
now := c.clock.Now()
if now.Sub(c.collectedTime) < c.collectPeriod {
return false
}
c.collectedTime = now
return true
}

352
sdk/metric/controller/basic/controller_test.go Normal file
View File

@@ -0,0 +1,352 @@
// 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.
package basic_test
import (
"context"
"errors"
"testing"
"time"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/otel/label"
"go.opentelemetry.io/otel/metric"
export "go.opentelemetry.io/otel/sdk/export/metric"
"go.opentelemetry.io/otel/sdk/export/metric/aggregation"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
"go.opentelemetry.io/otel/sdk/metric/controller/controllertest"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/processor/processortest"
)
func getMap(t *testing.T, cont *controller.Controller) map[string]float64 {
out := processortest.NewOutput(label.DefaultEncoder())
require.NoError(t, cont.ForEach(
export.CumulativeExportKindSelector(),
func(record export.Record) error {
return out.AddRecord(record)
},
))
return out.Map()
}
type testContextKey string
func testContext() context.Context {
ctx := context.Background()
return context.WithValue(ctx, testContextKey("A"), "B")
}
func checkTestContext(t *testing.T, ctx context.Context) {
require.Equal(t, "B", ctx.Value(testContextKey("A")))
}
func TestStartNoExporter(t *testing.T) {
cont := controller.New(
processor.New(
processortest.AggregatorSelector(),
export.CumulativeExportKindSelector(),
),
controller.WithCollectPeriod(time.Second),
)
mock := controllertest.NewMockClock()
cont.SetClock(mock)
prov := cont.MeterProvider()
calls := int64(0)
_ = metric.Must(prov.Meter("named")).NewInt64SumObserver("calls.lastvalue",
func(ctx context.Context, result metric.Int64ObserverResult) {
calls++
checkTestContext(t, ctx)
result.Observe(calls, label.String("A", "B"))
},
)
// Collect() has not been called. The controller is unstarted.
expect := map[string]float64{}
// The time advances, but doesn't change the result (not collected).
require.EqualValues(t, expect, getMap(t, cont))
mock.Add(time.Second)
require.EqualValues(t, expect, getMap(t, cont))
mock.Add(time.Second)
expect = map[string]float64{
"calls.lastvalue/A=B/": 1,
}
// Collect once
ctx := testContext()
require.NoError(t, cont.Collect(ctx))
require.EqualValues(t, expect, getMap(t, cont))
mock.Add(time.Second)
require.EqualValues(t, expect, getMap(t, cont))
mock.Add(time.Second)
// Again
expect = map[string]float64{
"calls.lastvalue/A=B/": 2,
}
require.NoError(t, cont.Collect(ctx))
require.EqualValues(t, expect, getMap(t, cont))
mock.Add(time.Second)
require.EqualValues(t, expect, getMap(t, cont))
// Start the controller
require.NoError(t, cont.Start(ctx))
for i := 1; i <= 3; i++ {
expect = map[string]float64{
"calls.lastvalue/A=B/": 2 + float64(i),
}
mock.Add(time.Second)
require.EqualValues(t, expect, getMap(t, cont))
}
}
func TestObserverCanceled(t *testing.T) {
cont := controller.New(
processor.New(
processortest.AggregatorSelector(),
export.CumulativeExportKindSelector(),
),
controller.WithCollectPeriod(0),
controller.WithCollectTimeout(time.Millisecond),
)
prov := cont.MeterProvider()
calls := int64(0)
_ = metric.Must(prov.Meter("named")).NewInt64SumObserver("done.lastvalue",
func(ctx context.Context, result metric.Int64ObserverResult) {
<-ctx.Done()
calls++
result.Observe(calls)
},
)
// This relies on the context timing out
err := cont.Collect(context.Background())
require.Error(t, err)
require.True(t, errors.Is(err, context.DeadlineExceeded))
expect := map[string]float64{
"done.lastvalue//": 1,
}
require.EqualValues(t, expect, getMap(t, cont))
}
func TestObserverContext(t *testing.T) {
cont := controller.New(
processor.New(
processortest.AggregatorSelector(),
export.CumulativeExportKindSelector(),
),
controller.WithCollectTimeout(0),
)
prov := cont.MeterProvider()
_ = metric.Must(prov.Meter("named")).NewInt64SumObserver("done.lastvalue",
func(ctx context.Context, result metric.Int64ObserverResult) {
time.Sleep(10 * time.Millisecond)
checkTestContext(t, ctx)
result.Observe(1)
},
)
ctx := testContext()
require.NoError(t, cont.Collect(ctx))
expect := map[string]float64{
"done.lastvalue//": 1,
}
require.EqualValues(t, expect, getMap(t, cont))
}
type blockingExporter struct {
calls int
exporter *processortest.Exporter
}
func newBlockingExporter() *blockingExporter {
return &blockingExporter{
exporter: processortest.NewExporter(
export.CumulativeExportKindSelector(),
label.DefaultEncoder(),
),
}
}
func (b *blockingExporter) Export(ctx context.Context, output export.CheckpointSet) error {
var err error
_ = b.exporter.Export(ctx, output)
if b.calls == 0 {
// timeout once
<-ctx.Done()
err = ctx.Err()
}
b.calls++
return err
}
func (*blockingExporter) ExportKindFor(
*metric.Descriptor,
aggregation.Kind,
) export.ExportKind {
return export.CumulativeExportKind
}
func TestExportTimeout(t *testing.T) {
exporter := newBlockingExporter()
cont := controller.New(
processor.New(
processortest.AggregatorSelector(),
export.CumulativeExportKindSelector(),
),
controller.WithCollectPeriod(time.Second),
controller.WithPushTimeout(time.Millisecond),
controller.WithPusher(exporter),
)
mock := controllertest.NewMockClock()
cont.SetClock(mock)
prov := cont.MeterProvider()
calls := int64(0)
_ = metric.Must(prov.Meter("named")).NewInt64SumObserver("one.lastvalue",
func(ctx context.Context, result metric.Int64ObserverResult) {
calls++
result.Observe(calls)
},
)
require.NoError(t, cont.Start(context.Background()))
// Initial empty state
expect := map[string]float64{}
require.EqualValues(t, expect, exporter.exporter.Values())
// Collect after 1s, timeout
mock.Add(time.Second)
err := testHandler.Flush()
require.Error(t, err)
require.True(t, errors.Is(err, context.DeadlineExceeded))
expect = map[string]float64{
"one.lastvalue//": 1,
}
require.EqualValues(t, expect, exporter.exporter.Values())
// Collect again
mock.Add(time.Second)
expect = map[string]float64{
"one.lastvalue//": 2,
}
require.EqualValues(t, expect, exporter.exporter.Values())
err = testHandler.Flush()
require.NoError(t, err)
}
func TestCollectAfterStopThenStartAgain(t *testing.T) {
exp := processortest.NewExporter(
export.CumulativeExportKindSelector(),
label.DefaultEncoder(),
)
cont := controller.New(
processor.New(
processortest.AggregatorSelector(),
exp,
),
controller.WithCollectPeriod(time.Second),
controller.WithPusher(exp),
)
mock := controllertest.NewMockClock()
cont.SetClock(mock)
prov := cont.MeterProvider()
calls := 0
_ = metric.Must(prov.Meter("named")).NewInt64SumObserver("one.lastvalue",
func(ctx context.Context, result metric.Int64ObserverResult) {
calls++
result.Observe(int64(calls))
},
)
// No collections happen (because mock clock does not advance):
require.NoError(t, cont.Start(context.Background()))
require.True(t, cont.IsRunning())
// There's one collection run by Stop():
require.NoError(t, cont.Stop(context.Background()))
require.EqualValues(t, map[string]float64{
"one.lastvalue//": 1,
}, exp.Values())
require.NoError(t, testHandler.Flush())
// Manual collect after Stop still works, subject to
// CollectPeriod.
require.NoError(t, cont.Collect(context.Background()))
require.EqualValues(t, map[string]float64{
"one.lastvalue//": 2,
}, getMap(t, cont))
require.NoError(t, testHandler.Flush())
require.False(t, cont.IsRunning())
// Start again, see that collection proceeds. However,
// explicit collection should still fail.
require.NoError(t, cont.Start(context.Background()))
require.True(t, cont.IsRunning())
err := cont.Collect(context.Background())
require.Error(t, err)
require.Equal(t, controller.ErrControllerStarted, err)
require.NoError(t, cont.Stop(context.Background()))
require.EqualValues(t, map[string]float64{
"one.lastvalue//": 3,
}, exp.Values())
require.False(t, cont.IsRunning())
// Time has not advanced yet. Now let the ticker perform
// collection:
require.NoError(t, cont.Start(context.Background()))
mock.Add(time.Second)
require.EqualValues(t, map[string]float64{
"one.lastvalue//": 4,
}, exp.Values())
mock.Add(time.Second)
require.EqualValues(t, map[string]float64{
"one.lastvalue//": 5,
}, exp.Values())
require.NoError(t, cont.Stop(context.Background()))
require.EqualValues(t, map[string]float64{
"one.lastvalue//": 6,
}, exp.Values())
}

31
sdk/metric/controller/pull/pull_test.go → sdk/metric/controller/basic/pull_test.go
View File

@@ -12,7 +12,7 @@
// See the License for the specific language governing permissions and
// limitations under the License.
package pull_test
package basic_test
import (
"context"
@@ -25,21 +25,20 @@ import (
"go.opentelemetry.io/otel/label"
"go.opentelemetry.io/otel/metric"
export "go.opentelemetry.io/otel/sdk/export/metric"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
"go.opentelemetry.io/otel/sdk/metric/controller/controllertest"
"go.opentelemetry.io/otel/sdk/metric/controller/pull"
"go.opentelemetry.io/otel/sdk/metric/processor/basic"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/processor/processortest"
selector "go.opentelemetry.io/otel/sdk/metric/selector/simple"
)
func TestPullNoCache(t *testing.T) {
puller := pull.New(
basic.New(
selector.NewWithExactDistribution(),
func TestPullNoCollect(t *testing.T) {
puller := controller.New(
processor.New(
processortest.AggregatorSelector(),
export.CumulativeExportKindSelector(),
basic.WithMemory(true),
processor.WithMemory(true),
),
pull.WithCachePeriod(0),
controller.WithCollectPeriod(0),
)
ctx := context.Background()
@@ -67,14 +66,14 @@ func TestPullNoCache(t *testing.T) {
}, records.Map())
}
func TestPullWithCache(t *testing.T) {
puller := pull.New(
basic.New(
selector.NewWithExactDistribution(),
func TestPullWithCollect(t *testing.T) {
puller := controller.New(
processor.New(
processortest.AggregatorSelector(),
export.CumulativeExportKindSelector(),
basic.WithMemory(true),
processor.WithMemory(true),
),
pull.WithCachePeriod(time.Second),
controller.WithCollectPeriod(time.Second),
)
mock := controllertest.NewMockClock()
puller.SetClock(mock)

65
sdk/metric/controller/push/push_test.go → sdk/metric/controller/basic/push_test.go
View File

@@ -12,10 +12,11 @@
// See the License for the specific language governing permissions and
// limitations under the License.
package push_test
package basic_test
import (
"context"
"errors"
"fmt"
"runtime"
"sync"
@@ -29,10 +30,10 @@ import (
"go.opentelemetry.io/otel/metric"
export "go.opentelemetry.io/otel/sdk/export/metric"
"go.opentelemetry.io/otel/sdk/export/metric/aggregation"
controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
"go.opentelemetry.io/otel/sdk/metric/controller/controllertest"
"go.opentelemetry.io/otel/sdk/metric/controller/push"
"go.opentelemetry.io/otel/sdk/metric/processor/basic"
processorTest "go.opentelemetry.io/otel/sdk/metric/processor/processortest"
processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
"go.opentelemetry.io/otel/sdk/metric/processor/processortest"
"go.opentelemetry.io/otel/sdk/resource"
)
@@ -64,48 +65,52 @@ func init() {
otel.SetErrorHandler(testHandler)
}
func newExporter() *processorTest.Exporter {
return processorTest.NewExporter(
func newExporter() *processortest.Exporter {
return processortest.NewExporter(
export.StatelessExportKindSelector(),
label.DefaultEncoder(),
)
}
func newCheckpointer() export.Checkpointer {
return processorTest.Checkpointer(
processorTest.NewProcessor(
processorTest.AggregatorSelector(),
return processortest.Checkpointer(
processortest.NewProcessor(
processortest.AggregatorSelector(),
label.DefaultEncoder(),
),
)
}
func TestPushDoubleStop(t *testing.T) {
ctx := context.Background()
exporter := newExporter()
checkpointer := newCheckpointer()
p := push.New(checkpointer, exporter)
p.Start()
p.Stop()
p.Stop()
p := controller.New(checkpointer, controller.WithPusher(exporter))
require.NoError(t, p.Start(ctx))
require.NoError(t, p.Stop(ctx))
require.NoError(t, p.Stop(ctx))
}
func TestPushDoubleStart(t *testing.T) {
ctx := context.Background()
exporter := newExporter()
checkpointer := newCheckpointer()
p := push.New(checkpointer, exporter)
p.Start()
p.Start()
p.Stop()
p := controller.New(checkpointer, controller.WithPusher(exporter))
require.NoError(t, p.Start(ctx))
err := p.Start(ctx)
require.Error(t, err)
require.True(t, errors.Is(err, controller.ErrControllerStarted))
require.NoError(t, p.Stop(ctx))
}
func TestPushTicker(t *testing.T) {
exporter := newExporter()
checkpointer := newCheckpointer()
p := push.New(
p := controller.New(
checkpointer,
exporter,
push.WithPeriod(time.Second),
push.WithResource(testResource),
controller.WithPusher(exporter),
controller.WithCollectPeriod(time.Second),
controller.WithResource(testResource),
)
meter := p.MeterProvider().Meter("name")
@@ -116,7 +121,7 @@ func TestPushTicker(t *testing.T) {
counter := metric.Must(meter).NewInt64Counter("counter.sum")
p.Start()
require.NoError(t, p.Start(ctx))
counter.Add(ctx, 3)
@@ -144,7 +149,7 @@ func TestPushTicker(t *testing.T) {
require.Equal(t, 1, exporter.ExportCount())
exporter.Reset()
p.Stop()
require.NoError(t, p.Stop(ctx))
}
func TestPushExportError(t *testing.T) {
@@ -180,12 +185,12 @@ func TestPushExportError(t *testing.T) {
// This test validates the error handling
// behavior of the basic Processor is honored
// by the push processor.
checkpointer := basic.New(processorTest.AggregatorSelector(), exporter)
p := push.New(
checkpointer := processor.New(processortest.AggregatorSelector(), exporter)
p := controller.New(
checkpointer,
exporter,
push.WithPeriod(time.Second),
push.WithResource(testResource),
controller.WithPusher(exporter),
controller.WithCollectPeriod(time.Second),
controller.WithResource(testResource),
)
mock := controllertest.NewMockClock()
@@ -197,7 +202,7 @@ func TestPushExportError(t *testing.T) {
counter1 := metric.Must(meter).NewInt64Counter("counter1.sum")
counter2 := metric.Must(meter).NewInt64Counter("counter2.sum")
p.Start()
require.NoError(t, p.Start(ctx))
runtime.Gosched()
counter1.Add(ctx, 3, label.String("X", "Y"))
@@ -219,7 +224,7 @@ func TestPushExportError(t *testing.T) {
require.Equal(t, tt.expectedError, err)
}
p.Stop()
require.NoError(t, p.Stop(ctx))
})
}
}

64
sdk/metric/controller/pull/config.go
View File

@@ -1,64 +0,0 @@
// 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.
package pull // import "go.opentelemetry.io/otel/sdk/metric/controller/pull"
import (
"time"
"go.opentelemetry.io/otel/sdk/resource"
)
// Config contains configuration for a pull Controller.
type Config struct {
// Resource is the OpenTelemetry resource associated with all Meters
// created by the Controller.
Resource *resource.Resource
// CachePeriod is the period which a recently-computed result
// will be returned without gathering metric data again.
//
// If the period is zero, caching of the result is disabled.
// The default value is 10 seconds.
CachePeriod time.Duration
}
// Option is the interface that applies the value to a configuration option.
type Option interface {
// Apply sets the Option value of a Config.
Apply(*Config)
}
// WithResource sets the Resource configuration option of a Config.
func WithResource(r *resource.Resource) Option {
return resourceOption{r}
}
type resourceOption struct{ *resource.Resource }
func (o resourceOption) Apply(config *Config) {
config.Resource = o.Resource
}
// WithCachePeriod sets the CachePeriod configuration option of a Config.
func WithCachePeriod(cachePeriod time.Duration) Option {
return cachePeriodOption(cachePeriod)
}
type cachePeriodOption time.Duration
func (o cachePeriodOption) Apply(config *Config) {
config.CachePeriod = time.Duration(o)
}

118
sdk/metric/controller/pull/pull.go
View File

@@ -1,118 +0,0 @@
// 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.
package pull // import "go.opentelemetry.io/otel/sdk/metric/controller/pull"
import (
"context"
"time"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/registry"
export "go.opentelemetry.io/otel/sdk/export/metric"
sdk "go.opentelemetry.io/otel/sdk/metric"
controllerTime "go.opentelemetry.io/otel/sdk/metric/controller/time"
"go.opentelemetry.io/otel/sdk/resource"
)
// DefaultCachePeriod determines how long a recently-computed result
// will be returned without gathering metric data again.
const DefaultCachePeriod time.Duration = 10 * time.Second
// Controller manages access to a *sdk.Accumulator and *basic.Processor. Use
// MeterProvider() for obtaining Meters. Use Foreach() for accessing current
// records.
type Controller struct {
accumulator *sdk.Accumulator
checkpointer export.Checkpointer
provider *registry.MeterProvider
period time.Duration
lastCollect time.Time
clock controllerTime.Clock
checkpoint export.CheckpointSet
}
// New returns a *Controller configured with an export.Checkpointer.
//
// Pull controllers are typically used in an environment where there
// are multiple readers. It is common, therefore, when configuring a
// basic Processor for use with this controller, to use a
// CumulativeExport strategy and the basic.WithMemory(true) option,
// which ensures that every CheckpointSet includes full state.
func New(checkpointer export.Checkpointer, options ...Option) *Controller {
config := &Config{
Resource: resource.Empty(),
CachePeriod: DefaultCachePeriod,
}
for _, opt := range options {
opt.Apply(config)
}
accum := sdk.NewAccumulator(
checkpointer,
config.Resource,
)
return &Controller{
accumulator: accum,
checkpointer: checkpointer,
provider: registry.NewMeterProvider(accum),
period: config.CachePeriod,
checkpoint: checkpointer.CheckpointSet(),
clock: controllerTime.RealClock{},
}
}
// SetClock sets the clock used for caching. For testing purposes.
func (c *Controller) SetClock(clock controllerTime.Clock) {
c.checkpointer.CheckpointSet().Lock()
defer c.checkpointer.CheckpointSet().Unlock()
c.clock = clock
}
// MeterProvider returns a MeterProvider for the implementation managed by
// this controller.
func (c *Controller) MeterProvider() metric.MeterProvider {
return c.provider
}
// Foreach gives the caller read-locked access to the current
// export.CheckpointSet.
func (c *Controller) ForEach(ks export.ExportKindSelector, f func(export.Record) error) error {
c.checkpointer.CheckpointSet().RLock()
defer c.checkpointer.CheckpointSet().RUnlock()
return c.checkpoint.ForEach(ks, f)
}
// Collect requests a collection. The collection will be skipped if
// the last collection is aged less than the CachePeriod.
func (c *Controller) Collect(ctx context.Context) error {
c.checkpointer.CheckpointSet().Lock()
defer c.checkpointer.CheckpointSet().Unlock()
if c.period > 0 {
now := c.clock.Now()
elapsed := now.Sub(c.lastCollect)
if elapsed < c.period {
return nil
}
c.lastCollect = now
}
c.checkpointer.StartCollection()
c.accumulator.Collect(ctx)
err := c.checkpointer.FinishCollection()
c.checkpoint = c.checkpointer.CheckpointSet()
return err
}

75
sdk/metric/controller/push/config.go
View File

@@ -1,75 +0,0 @@
// 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.
package push // import "go.opentelemetry.io/otel/sdk/metric/controller/push"
import (
"time"
"go.opentelemetry.io/otel/sdk/resource"
)
// Config contains configuration for a push Controller.
type Config struct {
// Resource is the OpenTelemetry resource associated with all Meters
// created by the Controller.
Resource *resource.Resource
// Period is the interval between calls to Collect a checkpoint.
Period time.Duration
// Timeout is the duration a collection (i.e. collect, accumulate,
// integrate, and export) can last before it is canceled. Defaults to
// the controller push period.
Timeout time.Duration
}
// Option is the interface that applies the value to a configuration option.
type Option interface {
// Apply sets the Option value of a Config.
Apply(*Config)
}
// WithResource sets the Resource configuration option of a Config.
func WithResource(r *resource.Resource) Option {
return resourceOption{r}
}
type resourceOption struct{ *resource.Resource }
func (o resourceOption) Apply(config *Config) {
config.Resource = o.Resource
}
// WithPeriod sets the Period configuration option of a Config.
func WithPeriod(period time.Duration) Option {
return periodOption(period)
}
type periodOption time.Duration
func (o periodOption) Apply(config *Config) {
config.Period = time.Duration(o)
}
// WithTimeout sets the Timeout configuration option of a Config.
func WithTimeout(timeout time.Duration) Option {
return timeoutOption(timeout)
}
type timeoutOption time.Duration
func (o timeoutOption) Apply(config *Config) {
config.Timeout = time.Duration(o)
}

153
sdk/metric/controller/push/push.go
View File

@@ -1,153 +0,0 @@
// 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.
package push // import "go.opentelemetry.io/otel/sdk/metric/controller/push"
import (
"context"
"sync"
"time"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/registry"
export "go.opentelemetry.io/otel/sdk/export/metric"
sdk "go.opentelemetry.io/otel/sdk/metric"
controllerTime "go.opentelemetry.io/otel/sdk/metric/controller/time"
)
// DefaultPushPeriod is the default time interval between pushes.
const DefaultPushPeriod = 10 * time.Second
// Controller organizes a periodic push of metric data.
type Controller struct {
lock sync.Mutex
accumulator *sdk.Accumulator
provider *registry.MeterProvider
checkpointer export.Checkpointer
exporter export.Exporter
wg sync.WaitGroup
ch chan struct{}
period time.Duration
timeout time.Duration
clock controllerTime.Clock
ticker controllerTime.Ticker
}
// New constructs a Controller, an implementation of MeterProvider, using the
// provided checkpointer, exporter, and options to configure an SDK with
// periodic collection.
func New(checkpointer export.Checkpointer, exporter export.Exporter, opts ...Option) *Controller {
c := &Config{
Period: DefaultPushPeriod,
}
for _, opt := range opts {
opt.Apply(c)
}
if c.Timeout == 0 {
c.Timeout = c.Period
}
impl := sdk.NewAccumulator(
checkpointer,
c.Resource,
)
return &Controller{
provider: registry.NewMeterProvider(impl),
accumulator: impl,
checkpointer: checkpointer,
exporter: exporter,
ch: make(chan struct{}),
period: c.Period,
timeout: c.Timeout,
clock: controllerTime.RealClock{},
}
}
// SetClock supports setting a mock clock for testing. This must be
// called before Start().
func (c *Controller) SetClock(clock controllerTime.Clock) {
c.lock.Lock()
defer c.lock.Unlock()
c.clock = clock
}
// MeterProvider returns a MeterProvider instance for this controller.
func (c *Controller) MeterProvider() metric.MeterProvider {
return c.provider
}
// Start begins a ticker that periodically collects and exports
// metrics with the configured interval.
func (c *Controller) Start() {
c.lock.Lock()
defer c.lock.Unlock()
if c.ticker != nil {
return
}
c.ticker = c.clock.Ticker(c.period)
c.wg.Add(1)
go c.run(c.ch)
}
// Stop waits for the background goroutine to return and then collects
// and exports metrics one last time before returning.
func (c *Controller) Stop() {
c.lock.Lock()
defer c.lock.Unlock()
if c.ch == nil {
return
}
close(c.ch)
c.ch = nil
c.wg.Wait()
c.ticker.Stop()
c.tick()
}
func (c *Controller) run(ch chan struct{}) {
for {
select {
case <-ch:
c.wg.Done()
return
case <-c.ticker.C():
c.tick()
}
}
}
func (c *Controller) tick() {
ctx, cancel := context.WithTimeout(context.Background(), c.timeout)
defer cancel()
ckpt := c.checkpointer.CheckpointSet()
ckpt.Lock()
defer ckpt.Unlock()
c.checkpointer.StartCollection()
c.accumulator.Collect(ctx)
if err := c.checkpointer.FinishCollection(); err != nil {
otel.Handle(err)
}
if err := c.exporter.Export(ctx, ckpt); err != nil {
otel.Handle(err)
}
}

3
sdk/metric/sdk.go
View File

@@ -412,8 +412,7 @@ func (m *Accumulator) observeAsyncInstruments(ctx context.Context) int {
asyncCollected := 0
// TODO: change this to `ctx` (in a separate PR, with tests)
m.asyncInstruments.Run(context.Background(), m)
m.asyncInstruments.Run(ctx, m)
for _, inst := range m.asyncInstruments.Instruments() {
if a := m.fromAsync(inst); a != nil {