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[chore] Add Go runtime and host metrics (#4137)

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Daenney is a dummy and forgot to add these when he revamped the OTEL stuff.

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4137
Co-authored-by: Daenney <daenney@noreply.codeberg.org>
Co-committed-by: Daenney <daenney@noreply.codeberg.org>
This commit is contained in:
Daenney
2025-05-06 08:18:05 +00:00
committed by tobi
parent 4a6b357501
commit 90a5425fe9
14 changed files with 1124 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
go.mod
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@@ -73,6 +73,7 @@ require (
github.com/wagslane/go-password-validator v0.3.0 github.com/wagslane/go-password-validator v0.3.0
github.com/yuin/goldmark v1.7.11 github.com/yuin/goldmark v1.7.11
go.opentelemetry.io/contrib/exporters/autoexport v0.60.0 go.opentelemetry.io/contrib/exporters/autoexport v0.60.0
go.opentelemetry.io/contrib/instrumentation/runtime v0.60.0
go.opentelemetry.io/otel v1.35.0 go.opentelemetry.io/otel v1.35.0
go.opentelemetry.io/otel/metric v1.35.0 go.opentelemetry.io/otel/metric v1.35.0
go.opentelemetry.io/otel/sdk v1.35.0 go.opentelemetry.io/otel/sdk v1.35.0

2
go.sum generated
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@@ -495,6 +495,8 @@ go.opentelemetry.io/contrib/bridges/prometheus v0.60.0 h1:x7sPooQCwSg27SjtQee8Gy
go.opentelemetry.io/contrib/bridges/prometheus v0.60.0/go.mod h1:4K5UXgiHxV484efGs42ejD7E2J/sIlepYgdGoPXe7hE= go.opentelemetry.io/contrib/bridges/prometheus v0.60.0/go.mod h1:4K5UXgiHxV484efGs42ejD7E2J/sIlepYgdGoPXe7hE=
go.opentelemetry.io/contrib/exporters/autoexport v0.60.0 h1:GuQXpvSXNjpswpweIem84U9BNauqHHi2w1GtNAalvpM= go.opentelemetry.io/contrib/exporters/autoexport v0.60.0 h1:GuQXpvSXNjpswpweIem84U9BNauqHHi2w1GtNAalvpM=
go.opentelemetry.io/contrib/exporters/autoexport v0.60.0/go.mod h1:CkmxekdHco4d7thFJNPQ7Mby4jMBgZUclnrxT4e+ryk= go.opentelemetry.io/contrib/exporters/autoexport v0.60.0/go.mod h1:CkmxekdHco4d7thFJNPQ7Mby4jMBgZUclnrxT4e+ryk=
go.opentelemetry.io/contrib/instrumentation/runtime v0.60.0 h1:0NgN/3SYkqYJ9NBlDfl/2lzVlwos/YQLvi8sUrzJRBE=
go.opentelemetry.io/contrib/instrumentation/runtime v0.60.0/go.mod h1:oxpUfhTkhgQaYIjtBt3T3w135dLoxq//qo3WPlPIKkE=
go.opentelemetry.io/otel v1.35.0 h1:xKWKPxrxB6OtMCbmMY021CqC45J+3Onta9MqjhnusiQ= go.opentelemetry.io/otel v1.35.0 h1:xKWKPxrxB6OtMCbmMY021CqC45J+3Onta9MqjhnusiQ=
go.opentelemetry.io/otel v1.35.0/go.mod h1:UEqy8Zp11hpkUrL73gSlELM0DupHoiq72dR+Zqel/+Y= go.opentelemetry.io/otel v1.35.0/go.mod h1:UEqy8Zp11hpkUrL73gSlELM0DupHoiq72dR+Zqel/+Y=
go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.11.0 h1:HMUytBT3uGhPKYY/u/G5MR9itrlSO2SMOsSD3Tk3k7A= go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.11.0 h1:HMUytBT3uGhPKYY/u/G5MR9itrlSO2SMOsSD3Tk3k7A=

7
internal/observability/metrics.go
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@@ -29,6 +29,7 @@ import (
"github.com/gin-gonic/gin" "github.com/gin-gonic/gin"
"github.com/technologize/otel-go-contrib/otelginmetrics" "github.com/technologize/otel-go-contrib/otelginmetrics"
"go.opentelemetry.io/contrib/exporters/autoexport" "go.opentelemetry.io/contrib/exporters/autoexport"
"go.opentelemetry.io/contrib/instrumentation/runtime"
"go.opentelemetry.io/otel" "go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/metric" "go.opentelemetry.io/otel/metric"
sdk "go.opentelemetry.io/otel/sdk/metric" sdk "go.opentelemetry.io/otel/sdk/metric"
@@ -59,6 +60,12 @@ func InitializeMetrics(ctx context.Context, db db.DB) error {
otel.SetMeterProvider(meterProvider) otel.SetMeterProvider(meterProvider)
if err := runtime.Start(
runtime.WithMeterProvider(meterProvider),
); err != nil {
return err
}
meter := meterProvider.Meter(serviceName) meter := meterProvider.Meter(serviceName)
thisInstance := config.GetHost() thisInstance := config.GetHost()

201
vendor/go.opentelemetry.io/contrib/instrumentation/runtime/LICENSE generated vendored Normal file
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@@ -0,0 +1,201 @@
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34
vendor/go.opentelemetry.io/contrib/instrumentation/runtime/doc.go generated vendored Normal file
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@@ -0,0 +1,34 @@
// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
// Package runtime implements the conventional runtime metrics specified by OpenTelemetry.
//
// The metric events 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
//
// When the OTEL_GO_X_DEPRECATED_RUNTIME_METRICS environment variable is set to
// false, the metrics produced are:
//
// go.memory.used By Memory used by the Go runtime.
// go.memory.limit By Go runtime memory limit configured by the user, if a limit exists.
// go.memory.allocated By Memory allocated to the heap by the application.
// go.memory.allocations {allocation} Count of allocations to the heap by the application.
// go.memory.gc.goal By Heap size target for the end of the GC cycle.
// go.goroutine.count {goroutine} Count of live goroutines.
// go.processor.limit {thread} The number of OS threads that can execute user-level Go code simultaneously.
// go.config.gogc % Heap size target percentage configured by the user, otherwise 100.
package runtime // import "go.opentelemetry.io/contrib/instrumentation/runtime"

22
vendor/go.opentelemetry.io/contrib/instrumentation/runtime/internal/deprecatedruntime/doc.go generated vendored Normal file
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@@ -0,0 +1,22 @@
// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
// Package deprecatedruntime implements the deprecated runtime metrics for OpenTelemetry.
//
// The metric events 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 deprecatedruntime // import "go.opentelemetry.io/contrib/instrumentation/runtime/internal/deprecatedruntime"

296
vendor/go.opentelemetry.io/contrib/instrumentation/runtime/internal/deprecatedruntime/runtime.go generated vendored Normal file
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@@ -0,0 +1,296 @@
// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package deprecatedruntime // import "go.opentelemetry.io/contrib/instrumentation/runtime/internal/deprecatedruntime"
import (
"context"
"math"
goruntime "runtime"
"sync"
"time"
"go.opentelemetry.io/otel/metric"
)
// Runtime reports the work-in-progress conventional runtime metrics specified by OpenTelemetry.
type runtime struct {
minimumReadMemStatsInterval time.Duration
meter metric.Meter
}
// Start initializes reporting of runtime metrics using the supplied config.
func Start(meter metric.Meter, minimumReadMemStatsInterval time.Duration) error {
r := &runtime{
meter: meter,
minimumReadMemStatsInterval: minimumReadMemStatsInterval,
}
return r.register()
}
func (r *runtime) register() error {
startTime := time.Now()
uptime, err := r.meter.Int64ObservableCounter(
"runtime.uptime",
metric.WithUnit("ms"),
metric.WithDescription("Milliseconds since application was initialized"),
)
if err != nil {
return err
}
goroutines, err := r.meter.Int64ObservableUpDownCounter(
"process.runtime.go.goroutines",
metric.WithDescription("Number of goroutines that currently exist"),
)
if err != nil {
return err
}
cgoCalls, err := r.meter.Int64ObservableUpDownCounter(
"process.runtime.go.cgo.calls",
metric.WithDescription("Number of cgo calls made by the current process"),
)
if err != nil {
return err
}
_, err = r.meter.RegisterCallback(
func(ctx context.Context, o metric.Observer) error {
o.ObserveInt64(uptime, time.Since(startTime).Milliseconds())
o.ObserveInt64(goroutines, int64(goruntime.NumGoroutine()))
o.ObserveInt64(cgoCalls, goruntime.NumCgoCall())
return nil
},
uptime,
goroutines,
cgoCalls,
)
if err != nil {
return err
}
return r.registerMemStats()
}
func (r *runtime) registerMemStats() error {
var (
err error
heapAlloc metric.Int64ObservableUpDownCounter
heapIdle metric.Int64ObservableUpDownCounter
heapInuse metric.Int64ObservableUpDownCounter
heapObjects metric.Int64ObservableUpDownCounter
heapReleased metric.Int64ObservableUpDownCounter
heapSys metric.Int64ObservableUpDownCounter
liveObjects metric.Int64ObservableUpDownCounter
// TODO: is ptrLookups useful? I've not seen a value
// other than zero.
ptrLookups metric.Int64ObservableCounter
gcCount metric.Int64ObservableCounter
pauseTotalNs metric.Int64ObservableCounter
gcPauseNs metric.Int64Histogram
lastNumGC uint32
lastMemStats time.Time
memStats goruntime.MemStats
// lock prevents a race between batch observer and instrument registration.
lock sync.Mutex
)
lock.Lock()
defer lock.Unlock()
if heapAlloc, err = r.meter.Int64ObservableUpDownCounter(
"process.runtime.go.mem.heap_alloc",
metric.WithUnit("By"),
metric.WithDescription("Bytes of allocated heap objects"),
); err != nil {
return err
}
if heapIdle, err = r.meter.Int64ObservableUpDownCounter(
"process.runtime.go.mem.heap_idle",
metric.WithUnit("By"),
metric.WithDescription("Bytes in idle (unused) spans"),
); err != nil {
return err
}
if heapInuse, err = r.meter.Int64ObservableUpDownCounter(
"process.runtime.go.mem.heap_inuse",
metric.WithUnit("By"),
metric.WithDescription("Bytes in in-use spans"),
); err != nil {
return err
}
if heapObjects, err = r.meter.Int64ObservableUpDownCounter(
"process.runtime.go.mem.heap_objects",
metric.WithDescription("Number of allocated heap objects"),
); err != nil {
return err
}
// FYI see https://github.com/golang/go/issues/32284 to help
// understand the meaning of this value.
if heapReleased, err = r.meter.Int64ObservableUpDownCounter(
"process.runtime.go.mem.heap_released",
metric.WithUnit("By"),
metric.WithDescription("Bytes of idle spans whose physical memory has been returned to the OS"),
); err != nil {
return err
}
if heapSys, err = r.meter.Int64ObservableUpDownCounter(
"process.runtime.go.mem.heap_sys",
metric.WithUnit("By"),
metric.WithDescription("Bytes of heap memory obtained from the OS"),
); err != nil {
return err
}
if ptrLookups, err = r.meter.Int64ObservableCounter(
"process.runtime.go.mem.lookups",
metric.WithDescription("Number of pointer lookups performed by the runtime"),
); err != nil {
return err
}
if liveObjects, err = r.meter.Int64ObservableUpDownCounter(
"process.runtime.go.mem.live_objects",
metric.WithDescription("Number of live objects is the number of cumulative Mallocs - Frees"),
); err != nil {
return err
}
if gcCount, err = r.meter.Int64ObservableCounter(
"process.runtime.go.gc.count",
metric.WithDescription("Number of completed garbage collection cycles"),
); err != nil {
return err
}
// Note that the following could be derived as a sum of
// individual pauses, but we may lose individual pauses if the
// observation interval is too slow.
if pauseTotalNs, err = r.meter.Int64ObservableCounter(
"process.runtime.go.gc.pause_total_ns",
// TODO: nanoseconds units
metric.WithDescription("Cumulative nanoseconds in GC stop-the-world pauses since the program started"),
); err != nil {
return err
}
if gcPauseNs, err = r.meter.Int64Histogram(
"process.runtime.go.gc.pause_ns",
// TODO: nanoseconds units
metric.WithDescription("Amount of nanoseconds in GC stop-the-world pauses"),
); err != nil {
return err
}
_, err = r.meter.RegisterCallback(
func(ctx context.Context, o metric.Observer) error {
lock.Lock()
defer lock.Unlock()
now := time.Now()
if now.Sub(lastMemStats) >= r.minimumReadMemStatsInterval {
goruntime.ReadMemStats(&memStats)
lastMemStats = now
}
o.ObserveInt64(heapAlloc, clampUint64(memStats.HeapAlloc))
o.ObserveInt64(heapIdle, clampUint64(memStats.HeapIdle))
o.ObserveInt64(heapInuse, clampUint64(memStats.HeapInuse))
o.ObserveInt64(heapObjects, clampUint64(memStats.HeapObjects))
o.ObserveInt64(heapReleased, clampUint64(memStats.HeapReleased))
o.ObserveInt64(heapSys, clampUint64(memStats.HeapSys))
o.ObserveInt64(liveObjects, clampUint64(memStats.Mallocs-memStats.Frees))
o.ObserveInt64(ptrLookups, clampUint64(memStats.Lookups))
o.ObserveInt64(gcCount, int64(memStats.NumGC))
o.ObserveInt64(pauseTotalNs, clampUint64(memStats.PauseTotalNs))
computeGCPauses(ctx, gcPauseNs, memStats.PauseNs[:], lastNumGC, memStats.NumGC)
lastNumGC = memStats.NumGC
return nil
},
heapAlloc,
heapIdle,
heapInuse,
heapObjects,
heapReleased,
heapSys,
liveObjects,
ptrLookups,
gcCount,
pauseTotalNs,
)
if err != nil {
return err
}
return nil
}
func clampUint64(v uint64) int64 {
if v > math.MaxInt64 {
return math.MaxInt64
}
return int64(v) // nolint: gosec // Overflow checked above.
}
func computeGCPauses(
ctx context.Context,
recorder metric.Int64Histogram,
circular []uint64,
lastNumGC, currentNumGC uint32,
) {
delta := int(int64(currentNumGC) - int64(lastNumGC))
if delta == 0 {
return
}
if delta >= len(circular) {
// There were > 256 collections, some may have been lost.
recordGCPauses(ctx, recorder, circular)
return
}
n := len(circular)
if n < 0 {
// Only the case in error situations.
return
}
length := uint64(n) // nolint: gosec // n >= 0
i := uint64(lastNumGC) % length
j := uint64(currentNumGC) % length
if j < i { // wrap around the circular buffer
recordGCPauses(ctx, recorder, circular[i:])
recordGCPauses(ctx, recorder, circular[:j])
return
}
recordGCPauses(ctx, recorder, circular[i:j])
}
func recordGCPauses(
ctx context.Context,
recorder metric.Int64Histogram,
pauses []uint64,
) {
for _, pause := range pauses {
recorder.Record(ctx, clampUint64(pause))
}
}

38
vendor/go.opentelemetry.io/contrib/instrumentation/runtime/internal/x/README.md generated vendored Normal file
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@@ -0,0 +1,38 @@
# Feature Gates
The runtime package contains a feature gate used to ease the migration
from the [previous runtime metrics conventions] to the new [OpenTelemetry Go
Runtime conventions].
Note that the new runtime metrics conventions are still experimental, and may
change in backwards incompatible ways as feedback is applied.
## Features
- [Include Deprecated Metrics](#include-deprecated-metrics)
### Include Deprecated Metrics
Once new experimental runtime metrics are added, they will be produced
**in addition to** the existing runtime metrics. Users that migrate right away
can disable the old runtime metrics:
```console
export OTEL_GO_X_DEPRECATED_RUNTIME_METRICS=false
```
In a later release, the deprecated runtime metrics will stop being produced by
default. To temporarily re-enable the deprecated metrics:
```console
export OTEL_GO_X_DEPRECATED_RUNTIME_METRICS=true
```
After two additional releases, the deprecated runtime metrics will be removed,
and setting the environment variable will no longer have any effect.
The value set must be the case-insensitive string of `"true"` to enable the
feature, and `"false"` to disable the feature. All other values are ignored.
[previous runtime metrics conventions]: https://pkg.go.dev/go.opentelemetry.io/contrib/instrumentation/runtime@v0.52.0
[OpenTelemetry Go Runtime conventions]: https://github.com/open-telemetry/semantic-conventions/blob/main/docs/runtime/go-metrics.md

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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
// Package x contains support for OTel runtime instrumentation experimental features.
//
// This package should only be used for features defined in the specification.
// It should not be used for experiments or new project ideas.
package x // import "go.opentelemetry.io/contrib/instrumentation/runtime/internal/x"
import (
"os"
"strings"
)
// DeprecatedRuntimeMetrics is an experimental feature flag that defines if the deprecated
// runtime metrics should be produced. During development of the new
// conventions, it is enabled by default.
//
// To disable this feature set the OTEL_GO_X_DEPRECATED_RUNTIME_METRICS environment variable
// to the case-insensitive string value of "false" (i.e. "False" and "FALSE"
// will also enable this).
var DeprecatedRuntimeMetrics = newFeature("DEPRECATED_RUNTIME_METRICS", true)
// BoolFeature is an experimental feature control flag. It provides a uniform way
// to interact with these feature flags and parse their values.
type BoolFeature struct {
key string
defaultVal bool
}
func newFeature(suffix string, defaultVal bool) BoolFeature {
const envKeyRoot = "OTEL_GO_X_"
return BoolFeature{
key: envKeyRoot + suffix,
defaultVal: defaultVal,
}
}
// Key returns the environment variable key that needs to be set to enable the
// feature.
func (f BoolFeature) Key() string { return f.key }
// Enabled returns if the feature is enabled.
func (f BoolFeature) Enabled() bool {
v := os.Getenv(f.key)
if strings.ToLower(v) == "false" {
return false
}
if strings.ToLower(v) == "true" {
return true
}
return f.defaultVal
}

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vendor/go.opentelemetry.io/contrib/instrumentation/runtime/options.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package runtime // import "go.opentelemetry.io/contrib/instrumentation/runtime"
import (
"time"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/metric"
)
// config contains optional settings for reporting runtime metrics.
type config struct {
// MinimumReadMemStatsInterval sets the minimum interval
// between calls to runtime.ReadMemStats(). Negative values
// are ignored.
MinimumReadMemStatsInterval time.Duration
// MeterProvider sets the metric.MeterProvider. If nil, the global
// Provider will be used.
MeterProvider metric.MeterProvider
}
// Option supports configuring optional settings for runtime metrics.
type Option interface {
apply(*config)
}
// ProducerOption supports configuring optional settings for runtime metrics using a
// metric producer in addition to standard instrumentation.
type ProducerOption interface {
Option
applyProducer(*config)
}
// DefaultMinimumReadMemStatsInterval is the default minimum interval
// between calls to runtime.ReadMemStats(). Use the
// WithMinimumReadMemStatsInterval() option to modify this setting in
// Start().
const DefaultMinimumReadMemStatsInterval time.Duration = 15 * time.Second
// WithMinimumReadMemStatsInterval sets a minimum interval between calls to
// runtime.ReadMemStats(), which is a relatively expensive call to make
// frequently. This setting is ignored when `d` is negative.
func WithMinimumReadMemStatsInterval(d time.Duration) Option {
return minimumReadMemStatsIntervalOption(d)
}
type minimumReadMemStatsIntervalOption time.Duration
func (o minimumReadMemStatsIntervalOption) apply(c *config) {
if o >= 0 {
c.MinimumReadMemStatsInterval = time.Duration(o)
}
}
func (o minimumReadMemStatsIntervalOption) applyProducer(c *config) { o.apply(c) }
// WithMeterProvider sets the Metric implementation to use for
// reporting. If this option is not used, the global metric.MeterProvider
// will be used. `provider` must be non-nil.
func WithMeterProvider(provider metric.MeterProvider) Option {
return metricProviderOption{provider}
}
type metricProviderOption struct{ metric.MeterProvider }
func (o metricProviderOption) apply(c *config) {
if o.MeterProvider != nil {
c.MeterProvider = o.MeterProvider
}
}
// newConfig computes a config from the supplied Options.
func newConfig(opts ...Option) config {
c := config{
MeterProvider: otel.GetMeterProvider(),
}
for _, opt := range opts {
opt.apply(&c)
}
if c.MinimumReadMemStatsInterval <= 0 {
c.MinimumReadMemStatsInterval = DefaultMinimumReadMemStatsInterval
}
return c
}
// newConfig computes a config from the supplied ProducerOptions.
func newProducerConfig(opts ...ProducerOption) config {
c := config{}
for _, opt := range opts {
opt.applyProducer(&c)
}
if c.MinimumReadMemStatsInterval <= 0 {
c.MinimumReadMemStatsInterval = DefaultMinimumReadMemStatsInterval
}
return c
}

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vendor/go.opentelemetry.io/contrib/instrumentation/runtime/producer.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package runtime // import "go.opentelemetry.io/contrib/instrumentation/runtime"
import (
"context"
"errors"
"math"
"runtime/metrics"
"sync"
"time"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/sdk/instrumentation"
"go.opentelemetry.io/otel/sdk/metric"
"go.opentelemetry.io/otel/sdk/metric/metricdata"
)
var startTime time.Time
func init() {
startTime = time.Now()
}
var histogramMetrics = []string{goSchedLatencies}
// Producer is a metric.Producer, which provides precomputed histogram metrics from the go runtime.
type Producer struct {
lock sync.Mutex
collector *goCollector
}
var _ metric.Producer = (*Producer)(nil)
// NewProducer creates a Producer which provides precomputed histogram metrics from the go runtime.
func NewProducer(opts ...ProducerOption) *Producer {
c := newProducerConfig(opts...)
return &Producer{
collector: newCollector(c.MinimumReadMemStatsInterval, histogramMetrics),
}
}
// Produce returns precomputed histogram metrics from the go runtime, or an error if unsuccessful.
func (p *Producer) Produce(context.Context) ([]metricdata.ScopeMetrics, error) {
p.lock.Lock()
p.collector.refresh()
schedHist := p.collector.getHistogram(goSchedLatencies)
p.lock.Unlock()
// Use the last collection time (which may or may not be now) for the timestamp.
histDp := convertRuntimeHistogram(schedHist, p.collector.lastCollect)
if len(histDp) == 0 {
return nil, errors.New("unable to obtain go.schedule.duration metric from the runtime")
}
return []metricdata.ScopeMetrics{
{
Scope: instrumentation.Scope{
Name: ScopeName,
Version: Version(),
},
Metrics: []metricdata.Metrics{
{
Name: "go.schedule.duration",
Description: "The time goroutines have spent in the scheduler in a runnable state before actually running.",
Unit: "s",
Data: metricdata.Histogram[float64]{
Temporality: metricdata.CumulativeTemporality,
DataPoints: histDp,
},
},
},
},
}, nil
}
var emptySet = attribute.EmptySet()
func convertRuntimeHistogram(runtimeHist *metrics.Float64Histogram, ts time.Time) []metricdata.HistogramDataPoint[float64] {
if runtimeHist == nil {
return nil
}
bounds := runtimeHist.Buckets
counts := runtimeHist.Counts
if len(bounds) < 2 {
// runtime histograms are guaranteed to have at least two bucket boundaries.
return nil
}
// trim the first bucket since it is a lower bound. OTel histogram boundaries only have an upper bound.
bounds = bounds[1:]
if bounds[len(bounds)-1] == math.Inf(1) {
// trim the last bucket if it is +Inf, since the +Inf boundary is implicit in OTel.
bounds = bounds[:len(bounds)-1]
} else {
// if the last bucket is not +Inf, append an extra zero count since
// the implicit +Inf bucket won't have any observations.
counts = append(counts, 0)
}
count := uint64(0)
sum := float64(0)
for i, c := range counts {
count += c
// This computed sum is an underestimate, since it assumes each
// observation happens at the bucket's lower bound.
if i > 0 && count != 0 {
sum += bounds[i-1] * float64(count)
}
}
return []metricdata.HistogramDataPoint[float64]{
{
StartTime: startTime,
Count: count,
Sum: sum,
Time: ts,
Bounds: bounds,
BucketCounts: counts,
Attributes: *emptySet,
},
}
}

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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package runtime // import "go.opentelemetry.io/contrib/instrumentation/runtime"
import (
"context"
"math"
"runtime/metrics"
"sync"
"time"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/contrib/instrumentation/runtime/internal/deprecatedruntime"
"go.opentelemetry.io/contrib/instrumentation/runtime/internal/x"
)
// ScopeName is the instrumentation scope name.
const ScopeName = "go.opentelemetry.io/contrib/instrumentation/runtime"
const (
goTotalMemory = "/memory/classes/total:bytes"
goMemoryReleased = "/memory/classes/heap/released:bytes"
goHeapMemory = "/memory/classes/heap/stacks:bytes"
goMemoryLimit = "/gc/gomemlimit:bytes"
goMemoryAllocated = "/gc/heap/allocs:bytes"
goMemoryAllocations = "/gc/heap/allocs:objects"
goMemoryGoal = "/gc/heap/goal:bytes"
goGoroutines = "/sched/goroutines:goroutines"
goMaxProcs = "/sched/gomaxprocs:threads"
goConfigGC = "/gc/gogc:percent"
goSchedLatencies = "/sched/latencies:seconds"
)
// Start initializes reporting of runtime metrics using the supplied config.
// For goroutine scheduling metrics, additionally see [NewProducer].
func Start(opts ...Option) error {
c := newConfig(opts...)
meter := c.MeterProvider.Meter(
ScopeName,
metric.WithInstrumentationVersion(Version()),
)
if x.DeprecatedRuntimeMetrics.Enabled() {
return deprecatedruntime.Start(meter, c.MinimumReadMemStatsInterval)
}
memoryUsedInstrument, err := meter.Int64ObservableUpDownCounter(
"go.memory.used",
metric.WithUnit("By"),
metric.WithDescription("Memory used by the Go runtime."),
)
if err != nil {
return err
}
memoryLimitInstrument, err := meter.Int64ObservableUpDownCounter(
"go.memory.limit",
metric.WithUnit("By"),
metric.WithDescription("Go runtime memory limit configured by the user, if a limit exists."),
)
if err != nil {
return err
}
memoryAllocatedInstrument, err := meter.Int64ObservableCounter(
"go.memory.allocated",
metric.WithUnit("By"),
metric.WithDescription("Memory allocated to the heap by the application."),
)
if err != nil {
return err
}
memoryAllocationsInstrument, err := meter.Int64ObservableCounter(
"go.memory.allocations",
metric.WithUnit("{allocation}"),
metric.WithDescription("Count of allocations to the heap by the application."),
)
if err != nil {
return err
}
memoryGCGoalInstrument, err := meter.Int64ObservableUpDownCounter(
"go.memory.gc.goal",
metric.WithUnit("By"),
metric.WithDescription("Heap size target for the end of the GC cycle."),
)
if err != nil {
return err
}
goroutineCountInstrument, err := meter.Int64ObservableUpDownCounter(
"go.goroutine.count",
metric.WithUnit("{goroutine}"),
metric.WithDescription("Count of live goroutines."),
)
if err != nil {
return err
}
processorLimitInstrument, err := meter.Int64ObservableUpDownCounter(
"go.processor.limit",
metric.WithUnit("{thread}"),
metric.WithDescription("The number of OS threads that can execute user-level Go code simultaneously."),
)
if err != nil {
return err
}
gogcConfigInstrument, err := meter.Int64ObservableUpDownCounter(
"go.config.gogc",
metric.WithUnit("%"),
metric.WithDescription("Heap size target percentage configured by the user, otherwise 100."),
)
if err != nil {
return err
}
otherMemoryOpt := metric.WithAttributeSet(
attribute.NewSet(attribute.String("go.memory.type", "other")),
)
stackMemoryOpt := metric.WithAttributeSet(
attribute.NewSet(attribute.String("go.memory.type", "stack")),
)
collector := newCollector(c.MinimumReadMemStatsInterval, runtimeMetrics)
var lock sync.Mutex
_, err = meter.RegisterCallback(
func(ctx context.Context, o metric.Observer) error {
lock.Lock()
defer lock.Unlock()
collector.refresh()
stackMemory := collector.getInt(goHeapMemory)
o.ObserveInt64(memoryUsedInstrument, stackMemory, stackMemoryOpt)
totalMemory := collector.getInt(goTotalMemory) - collector.getInt(goMemoryReleased)
otherMemory := totalMemory - stackMemory
o.ObserveInt64(memoryUsedInstrument, otherMemory, otherMemoryOpt)
// Only observe the limit metric if a limit exists
if limit := collector.getInt(goMemoryLimit); limit != math.MaxInt64 {
o.ObserveInt64(memoryLimitInstrument, limit)
}
o.ObserveInt64(memoryAllocatedInstrument, collector.getInt(goMemoryAllocated))
o.ObserveInt64(memoryAllocationsInstrument, collector.getInt(goMemoryAllocations))
o.ObserveInt64(memoryGCGoalInstrument, collector.getInt(goMemoryGoal))
o.ObserveInt64(goroutineCountInstrument, collector.getInt(goGoroutines))
o.ObserveInt64(processorLimitInstrument, collector.getInt(goMaxProcs))
o.ObserveInt64(gogcConfigInstrument, collector.getInt(goConfigGC))
return nil
},
memoryUsedInstrument,
memoryLimitInstrument,
memoryAllocatedInstrument,
memoryAllocationsInstrument,
memoryGCGoalInstrument,
goroutineCountInstrument,
processorLimitInstrument,
gogcConfigInstrument,
)
if err != nil {
return err
}
return nil
}
// These are the metrics we actually fetch from the go runtime.
var runtimeMetrics = []string{
goTotalMemory,
goMemoryReleased,
goHeapMemory,
goMemoryLimit,
goMemoryAllocated,
goMemoryAllocations,
goMemoryGoal,
goGoroutines,
goMaxProcs,
goConfigGC,
}
type goCollector struct {
// now is used to replace the implementation of time.Now for testing
now func() time.Time
// lastCollect tracks the last time metrics were refreshed
lastCollect time.Time
// minimumInterval is the minimum amount of time between calls to metrics.Read
minimumInterval time.Duration
// sampleBuffer is populated by runtime/metrics
sampleBuffer []metrics.Sample
// sampleMap allows us to easily get the value of a single metric
sampleMap map[string]*metrics.Sample
}
func newCollector(minimumInterval time.Duration, metricNames []string) *goCollector {
g := &goCollector{
sampleBuffer: make([]metrics.Sample, 0, len(metricNames)),
sampleMap: make(map[string]*metrics.Sample, len(metricNames)),
minimumInterval: minimumInterval,
now: time.Now,
}
for _, metricName := range metricNames {
g.sampleBuffer = append(g.sampleBuffer, metrics.Sample{Name: metricName})
// sampleMap references a position in the sampleBuffer slice. If an
// element is appended to sampleBuffer, it must be added to sampleMap
// for the sample to be accessible in sampleMap.
g.sampleMap[metricName] = &g.sampleBuffer[len(g.sampleBuffer)-1]
}
return g
}
func (g *goCollector) refresh() {
now := g.now()
if now.Sub(g.lastCollect) < g.minimumInterval {
// refresh was invoked more frequently than allowed by the minimum
// interval. Do nothing.
return
}
metrics.Read(g.sampleBuffer)
g.lastCollect = now
}
func (g *goCollector) getInt(name string) int64 {
if s, ok := g.sampleMap[name]; ok && s.Value.Kind() == metrics.KindUint64 {
v := s.Value.Uint64()
if v > math.MaxInt64 {
return math.MaxInt64
}
return int64(v) // nolint: gosec // Overflow checked above.
}
return 0
}
func (g *goCollector) getHistogram(name string) *metrics.Float64Histogram {
if s, ok := g.sampleMap[name]; ok && s.Value.Kind() == metrics.KindFloat64Histogram {
return s.Value.Float64Histogram()
}
return nil
}

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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package runtime // import "go.opentelemetry.io/contrib/instrumentation/runtime"
// Version is the current release version of the runtime instrumentation.
func Version() string {
return "0.60.0"
// This string is updated by the pre_release.sh script during release
}
// SemVersion is the semantic version to be supplied to tracer/meter creation.
//
// Deprecated: Use [Version] instead.
func SemVersion() string {
return Version()
}

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vendor/modules.txt vendored
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# go.opentelemetry.io/contrib/exporters/autoexport v0.60.0 # go.opentelemetry.io/contrib/exporters/autoexport v0.60.0
## explicit; go 1.22.0 ## explicit; go 1.22.0
go.opentelemetry.io/contrib/exporters/autoexport go.opentelemetry.io/contrib/exporters/autoexport
# go.opentelemetry.io/contrib/instrumentation/runtime v0.60.0
## explicit; go 1.22.0
go.opentelemetry.io/contrib/instrumentation/runtime
go.opentelemetry.io/contrib/instrumentation/runtime/internal/deprecatedruntime
go.opentelemetry.io/contrib/instrumentation/runtime/internal/x
# go.opentelemetry.io/otel v1.35.0 # go.opentelemetry.io/otel v1.35.0
## explicit; go 1.22.0 ## explicit; go 1.22.0
go.opentelemetry.io/otel go.opentelemetry.io/otel