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Runtime metrics plugin (#9)
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* stub runtime go func metrics

* stub more runtime metrics

* fix go mod path

* bump 1.14, remove procstats stub

* cleanup go runtime metrics

* add rwmutex

* Update plugins/metrics/runtime/example/main.go

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>

* Update plugins/metrics/runtime/runtime_test.go

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>

* Update plugins/metrics/runtime/runtime.go

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>

* add doc.go, pr feedback

* plugins/metrics/runtime -> plugins/runtime

Co-authored-by: Anthony Mirabella <a9@aneurysm9.com>
Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
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18 changes: 18 additions & 0 deletions plugins/runtime/doc.go
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// package runtime implements the work-in-progress conventional runtime metrics specified by OpenTelemetry.
//
// The metrics produced are:
// runtime.go.cgo.calls - Number of cgo calls made by the current process
// runtime.go.gc.count - Number of completed garbage collection cycles
// runtime.go.gc.pause_ns (ns) Amount of nanoseconds in GC stop-the-world pauses
// runtime.go.gc.pause_total_ns (ns) Cumulative nanoseconds in GC stop-the-world pauses since the program started
// runtime.go.goroutines - Number of goroutines that currently exist
// runtime.go.lookups - Number of pointer lookups performed by the runtime
// runtime.go.mem.heap_alloc (bytes) Bytes of allocated heap objects
// runtime.go.mem.heap_idle (bytes) Bytes in idle (unused) spans
// runtime.go.mem.heap_inuse (bytes) Bytes in in-use spans
// runtime.go.mem.heap_objects - Number of allocated heap objects
// runtime.go.mem.heap_released (bytes) Bytes of idle spans whose physical memory has been returned to the OS
// runtime.go.mem.heap_sys (bytes) Bytes of heap memory obtained from the OS
// runtime.go.mem.live_objects - Number of live objects is the number of cumulative Mallocs - Frees
// runtime.uptime (ms) Milliseconds since application was initialized
package runtime
59 changes: 59 additions & 0 deletions plugins/runtime/example/main.go
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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.

package main

import (
"log"
"os"
"os/signal"
"syscall"
"time"

"go.opentelemetry.io/otel/api/global"
metricstdout "go.opentelemetry.io/otel/exporters/metric/stdout"
"go.opentelemetry.io/otel/sdk/metric/controller/push"

"go.opentelemetry.io/contrib/plugins/runtime"
)

func initMeter() *push.Controller {
pusher, err := metricstdout.NewExportPipeline(metricstdout.Config{
Quantiles: []float64{0.5},
PrettyPrint: true,
}, 10*time.Second)
if err != nil {
log.Panicf("failed to initialize metric stdout exporter %v", err)
}
global.SetMeterProvider(pusher)
return pusher
}

func main() {
defer initMeter().Stop()

meter := global.Meter("runtime")

r := runtime.New(meter, time.Second)
err := r.Start()
if err != nil {
panic(err)
}

stopChan := make(chan os.Signal, 1)
signal.Notify(stopChan, syscall.SIGTERM, syscall.SIGINT)
<-stopChan

r.Stop()
}
8 changes: 8 additions & 0 deletions plugins/runtime/go.mod
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module go.opentelemetry.io/contrib/plugins/runtime

go 1.14

require (
github.com/stretchr/testify v1.4.0
go.opentelemetry.io/otel v0.4.3
)
77 changes: 77 additions & 0 deletions plugins/runtime/go.sum
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