Amehlem/opentelemetry

[AMehlem]

Implemented sending metrics via OpenTelemetry protocol.

[AMehlem]

@microsoft-github-policy-service agree company="Element44 GmbH"

[Copilot]

Pull request overview

This pull request implements OpenTelemetry metrics export functionality for the Garnet server, enabling observability through the OTLP (OpenTelemetry Protocol) by exposing server-level, session-level, and latency metrics via the OpenTelemetry SDK.

Changes:

• Added OpenTelemetry SDK integration with configurable endpoint, protocol, timeout, and interval settings
• Exposed server connection metrics (active, received, disposed), session metrics (commands, network I/O, cache lookups), and latency metrics (command processing time, bytes/ops per call) as OpenTelemetry instruments
• Added comprehensive configuration options in GarnetServerOptions and command-line interface

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
Directory.Packages.props	Added OpenTelemetry and OpenTelemetry.Exporter.OpenTelemetryProtocol package dependencies (version 1.13.1)
libs/server/Garnet.server.csproj	Referenced OpenTelemetry.Exporter.OpenTelemetryProtocol package
libs/server/Servers/GarnetServerOptions.cs	Added OpenTelemetry configuration properties and validation logic
libs/server/StoreWrapper.cs	Integrated GarnetOpenTelemetryServerMonitor lifecycle management
libs/server/Metrics/GarnetOpenTelemetryServerMonitor.cs	Central coordinator for OpenTelemetry metrics registration and OTLP exporter configuration
libs/server/Metrics/GarnetOpenTelemetryServerMetrics.cs	Exposes server connection metrics as OpenTelemetry instruments
libs/server/Metrics/GarnetOpenTelemetrySessionMetrics.cs	Exposes session-level metrics (commands, network, cache) as OpenTelemetry instruments
libs/server/Metrics/Latency/GarnetOpenTelemetryLatencyMetrics.cs	Provides latency metrics using histograms for command processing time and per-call metrics
libs/server/Metrics/Latency/GarnetLatencyMetricsSession.cs	Integrated OpenTelemetry latency recording into existing latency tracking
libs/server/Metrics/Info/GarnetInfoMetrics.cs	Added OpenTelemetry endpoint and export status to INFO command output
libs/host/Configuration/Options.cs	Added command-line options for OpenTelemetry configuration
libs/host/defaults.conf	Added default OpenTelemetry configuration values
test/Garnet.test/TestUtils.cs	Added enableOpenTelemetry parameter to test server creation
test/Garnet.test/OpenTelemetryTests.cs	Added comprehensive tests for OpenTelemetry functionality including disabled, invalid, and enabled scenarios

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