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feat(otel): Add OpenTelemetry Native Metrics Support (#3637)
* First draft. One metric - command duration. Signed-off-by: Elena Kolevska <elena@kolevska.com> * Adds connection state metrics Signed-off-by: Elena Kolevska <elena@kolevska.com> * wip Signed-off-by: Elena Kolevska <elena@kolevska.com> * Add phase 1 metrics * Add client api configurations * remove redundent code * refactor: move otel-metrics example to separate module * refactor: move otel-metrics example to separate module * remove internal test * Resolve merge conflicts with upstream/master * Fix linting issues * Fix pool idle connection counter bug * Add OTel performance benchmarking suite * Improve perf compatison script * Add phase 2,3 metrics * Remove local benchmark tests * Add new fields to tests * Change db.client.connection.count and db.client.connection.pending_request metric type from UpAndDownCounter to Async gauge. * fix golangci lint * Add piplined commands metrics support * Redesign otel init method * Address comments * Fix golangci-lint errors * Fix passing nil pointer * Add metric prefix to callbacks and atomic batch registration * Add unique name for pool.name attr * Fix unique pool name for pubsub * Refactor all hardcoded OTel attribute strings to use constants * Refactor all hardcoded OTel attribute strings to use constants * extract metric names and pool names as constants, improve error handling --------- Signed-off-by: Elena Kolevska <elena@kolevska.com> Co-authored-by: Elena Kolevska <elena@kolevska.com>
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‎.gitignore‎

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.vscode
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tmp/*
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*.test
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extra/redisotel-native/metrics-collector-app/
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# maintenanceNotifications upgrade documentation (temporary)
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maintenanceNotifications/docs/
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‎example/cluster-mget/go.mod‎

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require (
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github.com/cespare/xxhash/v2 v2.3.0 // indirect
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github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
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go.uber.org/atomic v1.11.0 // indirect
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)

‎example/cluster-mget/go.sum‎

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‎example/del-keys-without-ttl/go.sum‎

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‎example/hll/go.sum‎

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‎example/hset-struct/go.sum‎

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‎example/lua-scripting/go.sum‎

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‎example/maintnotifiations-pubsub/go.sum‎

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‎example/otel-metrics/README.md‎

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# OpenTelemetry Metrics Example
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This example demonstrates how to enable OpenTelemetry metrics for Redis operations using the `extra/redisotel-native` package.
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## Features
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- ✅ OTLP exporter configuration
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- ✅ Periodic metric export (every 10 seconds)
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- ✅ Concurrent Redis operations
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- ✅ Automatic metric collection for:
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- Operation duration
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- Connection metrics
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- Error tracking
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## Prerequisites
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- Go 1.23.0 or later
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- Redis server running on `localhost:6379`
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- OTLP collector running on `localhost:4317` (optional)
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## Running the Example
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```bash
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# Start Redis (if not already running)
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redis-server
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# Optional: Start OTLP collector
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# See: https://opentelemetry.io/docs/collector/
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# Run the example
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go run main.go
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```
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## What It Does
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1. Creates an OTLP exporter that sends metrics to a collector
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2. Sets up a meter provider with periodic export (every 10 seconds)
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3. Initializes Redis client with OTel instrumentation
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4. Executes concurrent Redis operations (SET commands)
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5. Waits for metrics to be exported
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## Metrics Collected
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The example automatically collects:
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- **db.client.operation.duration** - Operation latency histogram
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- **db.client.connection.create_time** - Connection creation time
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- **db.client.connection.count** - Active connection count
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- **db.client.errors** - Error counter with error type classification
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## Configuration
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To use with a production OTLP collector:
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```go
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exporter, err := otlpmetricgrpc.New(ctx,
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otlpmetricgrpc.WithEndpoint("your-collector:4317"),
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otlpmetricgrpc.WithTLSCredentials(credentials.NewClientTLSFromCert(certPool, "")),
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)
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```
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## See Also
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- [OpenTelemetry Go SDK](https://opentelemetry.io/docs/languages/go/)
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- [OTLP Exporter Documentation](https://opentelemetry.io/docs/specs/otlp/)
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- [Redis OTel Native Package](../../extra/redisotel-native/)
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‎example/otel-metrics/go.mod‎

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module github.com/redis/go-redis/example/otel-metrics
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go 1.24.0
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toolchain go1.24.4
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replace github.com/redis/go-redis/v9 => ../..
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replace github.com/redis/go-redis/extra/redisotel-native/v9 => ../../extra/redisotel-native
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require (
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github.com/redis/go-redis/extra/redisotel-native/v9 v9.0.0-00010101000000-000000000000
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github.com/redis/go-redis/v9 v9.7.0
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go.opentelemetry.io/otel v1.39.0
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go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.38.0
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go.opentelemetry.io/otel/sdk/metric v1.39.0
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)
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require (
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github.com/cenkalti/backoff/v5 v5.0.3 // indirect
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github.com/cespare/xxhash/v2 v2.3.0 // indirect
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github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
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github.com/go-logr/logr v1.4.3 // indirect
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github.com/go-logr/stdr v1.2.2 // indirect
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github.com/google/uuid v1.6.0 // indirect
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github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2 // indirect
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go.opentelemetry.io/auto/sdk v1.2.1 // indirect
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go.opentelemetry.io/otel/metric v1.39.0 // indirect
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go.opentelemetry.io/otel/sdk v1.39.0 // indirect
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go.opentelemetry.io/otel/trace v1.39.0 // indirect
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go.opentelemetry.io/proto/otlp v1.7.1 // indirect
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go.uber.org/atomic v1.11.0 // indirect
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golang.org/x/net v0.43.0 // indirect
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golang.org/x/sys v0.39.0 // indirect
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golang.org/x/text v0.28.0 // indirect
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google.golang.org/genproto/googleapis/api v0.0.0-20250825161204-c5933d9347a5 // indirect
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google.golang.org/genproto/googleapis/rpc v0.0.0-20250825161204-c5933d9347a5 // indirect
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google.golang.org/grpc v1.75.0 // indirect
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google.golang.org/protobuf v1.36.8 // indirect
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)

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