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Metrics stdout export pipeline (#265)

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* Add MetricAggregator.Merge() implementations

* Update from feedback

* Type

* Ckpt

* Ckpt

* Add push controller

* Ckpt

* Add aggregator interfaces, stdout encoder

* Modify basic main.go

* Main is working

* Batch stdout output

* Sum udpate

* Rename stdout

* Add stateless/stateful Batcher options

* Undo a for-loop in the example, remove a done TODO

* Update imports

* Add note

* Rename defaultkeys

* Support variable label encoder to speed OpenMetrics/Statsd export

* Lint

* Doc

* Precommit/lint

* Simplify Aggregator API

* Record->Identifier

* Remove export.Record a.k.a. Identifier

* Checkpoint

* Propagate errors to the SDK, remove a bunch of 'TODO warn'

* Checkpoint

* Introduce export.Labels

* Comments in export/metric.go

* Comment

* More merge

* More doc

* Complete example

* Lint fixes

* Add a testable example

* Lint

* Let Export return an error

* add a basic stdout exporter test

* Add measure test; fix aggregator APIs

* Use JSON numbers, not strings

* Test stdout exporter error

* Add a test for the call to RangeTest

* Add error handler API to improve correctness test; return errors from RecordOne

* Undo the previous -- do not expose errors

* Add simple selector variations, test

* Repair examples

* Test push controller error handling

* Add SDK label encoder tests

* Add a defaultkeys batcher test

* Add an ungrouped batcher test

* Lint new tests

* Respond to krnowak's feedback

* Undo comment

* Use concrete receivers for export records and labels, since the constructors return structs not pointers

* Bug fix for stateful batchers; clone an aggregator for long term storage

* Remove TODO addressed in #318

* Add errors to all aggregator interfaces

* Handle ErrNoLastValue case in stdout exporter

* Move aggregator API into sdk/export/metric/aggregator

* Update all aggregator exported-method comments

* Document the aggregator APIs

* More aggregator comments

* Add multiple updates to the ungrouped test

* Fixes for feedback from Gustavo and Liz

* Producer->CheckpointSet; add FinishedCollection

* Process takes an export.Record

* ReadCheckpoint->CheckpointSet

* EncodeLabels->Encode

* Format a better inconsistent type error; add more aggregator API tests

* More RangeTest test coverage

* Make benbjohnson/clock a test-only dependency

* Handle ErrNoLastValue in stress_test
This commit is contained in:
Joshua MacDonald
2019-11-15 13:01:20 -08:00
committed by rghetia
parent c3d5b7b16d
commit 9878f3b700
48 changed files with 3312 additions and 491 deletions
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39
example/basic/main.go
View File

@ -17,13 +17,19 @@ package main
import (
"context"
"log"
"time"
"go.opentelemetry.io/otel/api/distributedcontext"
"go.opentelemetry.io/otel/api/key"
"go.opentelemetry.io/otel/api/metric"
"go.opentelemetry.io/otel/api/trace"
"go.opentelemetry.io/otel/exporter/trace/stdout"
metricstdout "go.opentelemetry.io/otel/exporter/metric/stdout"
tracestdout "go.opentelemetry.io/otel/exporter/trace/stdout"
"go.opentelemetry.io/otel/global"
metricsdk "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"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
)
@ -37,23 +43,44 @@ var (
// initTracer creates and registers trace provider instance.
func initTracer() {
var err error
exp, err := stdout.NewExporter(stdout.Options{PrettyPrint: false})
exp, err := tracestdout.NewExporter(tracestdout.Options{PrettyPrint: false})
if err != nil {
log.Panicf("failed to initialize stdout exporter %v\n", err)
log.Panicf("failed to initialize trace stdout exporter %v", err)
return
}
tp, err := sdktrace.NewProvider(sdktrace.WithSyncer(exp),
sdktrace.WithConfig(sdktrace.Config{DefaultSampler: sdktrace.AlwaysSample()}))
if err != nil {
log.Panicf("failed to initialize trace provider %v\n", err)
log.Panicf("failed to initialize trace provider %v", err)
}
global.SetTraceProvider(tp)
}
func initMeter() *push.Controller {
selector := simple.NewWithExactMeasure()
exporter, err := metricstdout.New(metricstdout.Options{
Quantiles: []float64{0.5, 0.9, 0.99},
PrettyPrint: false,
})
if err != nil {
log.Panicf("failed to initialize metric stdout exporter %v", err)
}
batcher := defaultkeys.New(selector, metricsdk.DefaultLabelEncoder(), true)
pusher := push.New(batcher, exporter, time.Second)
pusher.Start()
global.SetMeterProvider(pusher)
return pusher
}
func main() {
defer initMeter().Stop()
initTracer()
// Note: Have to get the meter and tracer after the global is
// initialized. See OTEP 0005.
tracer := global.TraceProvider().GetTracer("ex.com/basic")
// TODO: Meter doesn't work yet, check if resources to be shared afterwards.
meter := global.MeterProvider().GetMeter("ex.com/basic")
oneMetric := meter.NewFloat64Gauge("ex.com.one",
@ -70,7 +97,7 @@ func main() {
barKey.String("bar1"),
)
commonLabels := meter.Labels(lemonsKey.Int(10))
commonLabels := meter.Labels(lemonsKey.Int(10), key.String("A", "1"), key.String("B", "2"), key.String("C", "3"))
gauge := oneMetric.AcquireHandle(commonLabels)
defer gauge.Release()