elsa-core/src/modules/Elsa.Diagnostics.OpenTelemetry/README.md

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[codex] Fix console log metadata and type resolution (#7542) * Avoid null endpoint DTO metadata in tests * Enforce console logs hub read permission * Remove unused console logs hub import * Support mapped endpoint metadata in auth tests * Reduce console log capture throughput impact * Address Copilot console logs review * Refactor task scheduling to support tenant-level background work and enhance logging functionality. * Introduce ConsoleStreamHook for stdout/stderr tee and enhance logging validation. Adjust test cases and startup warnings for distributed lock provider usage. * Refactor console logging pipeline with capture optimization and new ConsoleLogsHost; update tests accordingly. * Add Ansi SGR parser for console logs and associated unit tests * Remove ANSI color renderings and parsers; integrate ConsoleLogScopeAccessor for improved logging context with workflow instance ID support. * Address console logs code quality feedback * Address PR review feedback * Preserve console logs extension points * Stabilize console logs host lifecycle * Address final automated review comments * Tighten console log capture shutdown * Address console log review feedback * Address follow-up review feedback * Cover final review feedback * Avoid recursive console provider initialization * Guard console host lease shutdown * Preserve console log scope and provider lifetime * Correlate console log scope fallback * Tighten console scope correlation * Expose host services during provider construction * Redact ANSI-normalized console lines * Add OpenTelemetry diagnostics backend foundation * Add OTLP HTTP ingestion parsing * Document OpenTelemetry diagnostics setup * Enforce OpenTelemetry hub permissions * Remove `ConsoleCaptureTee` and related services and tests * Add OpenTelemetry HTTP ingestion integration test * Use pipeline contributors for console log context * Update CShells package versions to 0.0.24-preview.132 * Add OpenTelemetry ingestion security tests * Add OpenTelemetry API authorization tests * Filter live console logs by workflow instance * Add OpenTelemetry hub tests * Add OpenTelemetry gRPC metadata hook * Assert OpenTelemetry workflow tags survive ingestion * Mark OpenTelemetry core build verified * Enhance console logging with activity execution metadata and extend test coverage. * Address console logs stream consumption comment * Wire OpenTelemetry diagnostics into core sample * Address Core diagnostics review feedback * Address Core Copilot follow-up feedback * Add OpenTelemetry metric instrument names * Address Core Copilot provider feedback * Address Core Copilot diagnostics follow-up * Address Core Copilot live feed feedback * Address Core Copilot store feedback * Integrate OpenTelemetry for logging, tracing, and metrics in ModularServer and update launch settings and docker-compose configuration. * Refactor to replace `ConsoleLogStream.Core` with `ConsoleLogStreaming.Core` across codebase and update `ConsoleStreamHook` installation. * Add diagnostics OpenTelemetry backend * Fix OpenTelemetry live hub subscription * Fix modular OpenTelemetry exporter endpoints * Add CShells logging configuration in appsettings.json * Remove obsolete unit tests and helper classes * Restore default activity exception handling * Simplify type serialization and alias management This commit refactors the internal type serialization and alias management system to reduce boilerplate, improve robustness, and simplify the developer experience: - Removed numerous explicit `ExpressionOptions` type alias registrations across various modules. - Updated `TypeJsonConverter` and polymorphic serialization to reliably handle types using assembly-qualified names when a short alias is not explicitly registered. - Streamlined `ExcludeFromHashConverter` to strictly adhere to `ExcludeFromHashAttribute` for hash calculations, removing complex `JsonIgnoreCondition` logic. - Eliminated several helper classes (`WorkflowJsonTypeResolver`, `WorkflowTypeValidator`, `IWorkflowTypeRegistry`, `WorkflowFactoryDictionary`, `JavaScriptExceptionTypeAliasRegistrar`, `WorkflowRuntimeTypeAliasRegistrar`) and their associated unit tests, simplifying the codebase. Additionally, this commit introduces a comprehensive markdown document (`product-website-feature-source.md`) outlining Elsa's core features, Studio capabilities, extension ecosystem, and architectural selling points, intended as source material for the product website. * Refine type serialization for improved robustness and alias handling This commit further enhances the type serialization and deserialization mechanisms: * Centralizes type resolution and alias management through `IWellKnownTypeRegistry` and `WorkflowJsonTypeResolver`. * Prioritizes registered type aliases when serializing type metadata in `PolymorphicObjectConverter`, resulting in more concise JSON output. * Enhances deserialization in `PolymorphicObjectConverter` and `VariableMapper` to gracefully handle unknown or non-instantiable types, providing fallbacks and logging warnings. * Simplifies `TypeJsonConverter` by delegating complex type resolution logic to the `WorkflowJsonTypeResolver`. * Adds `JsonArray` to the well-known type aliases for direct recognition. * Fix console logs packaging and workflow type resolution * Fix console log metadata and type resolution * Address Copilot review feedback * Enhance type resolution, improve console log handling, and update tests - Streamlined `WorkflowDictionaryExtensions` for better workflow registration validation. - Refined `ConsoleLogsAuthorizationTests` with the new `SetJsonRequest` helper to improve test requests handling. - Updated `OrderDefinition` to ignore JSON serialization for `KeySelector`. - Enhanced `WorkflowRuntimeFeature` for improved workflow registration and type alias configuration. - Added tests to ensure `ConsoleLogProvider` metadata filtration in various scenarios. - Improved type serialization logic in `WorkflowJsonTypeResolver`. - Updated README to fix references related to diagnostics. - Optimized `ExcludeFromHashConverter` for property serialization conditions. - Modified `TriggerIndexer` for streamlined trigger management. - Tested payload checks in `PublishEventTests`. - Adjusted `Endpoint` in `ConsoleLogs` for automatic JSON request handling. - Ensured registration of workflow type aliases in `WorkflowsFeature`. * Restore CLR workflow registration compatibility * Align JSON island serialization fixtures * Add Console Logs Services and Enhance Endpoint Handling - Introduced `ActivityExecutionsEndpointTests` to validate route exposure. - Added `ConsoleLogCaptureHostedService` for console log streaming. - Implemented `ConsoleStreamJsonConverter` for JSON conversion of console streams. - Developed `ElsaConsoleLogRecentBuffer` to handle recent log buffering. - Updated `ConsoleLogsAuthorizationTests` with new test cases for stream filter mapping. - Consolidated console log provider dependencies and registration, including recent buffering. - Enhanced `ElsaConsoleLogProvider` to use recent buffer for filtering. - Adjusted `Program.cs` for streamlined logging service setup. * Enhance type resolution and test coverage; streamline console log integration - Added `ConsoleStreamHook` for streamlined log streaming. - Updated `WorkflowJsonTypeResolverTests` to improve type resolution and test new scenarios. - Simplified type resolution by removing trusted assembly checks. * Fix CI smoke and package restore failures * Fix Docker smoke image project paths * Fix Docker Python runtime packages * Fix Docker CA smoke teardown * Refresh Elsa roadmap * Implement background processors and mediation coordination - Added `BackgroundCommandProcessor`, `BackgroundJobProcessor`, and `BackgroundNotificationProcessor` classes for handling commands, jobs, and notifications, respectively. - Introduced `MediatorBackgroundProcessingCoordinator` to coordinate the execution of all background processors. - Implemented `MediatorBackgroundTask` for wrapping `MediatorBackgroundProcessingCoordinator` in `BackgroundTask`. - Added unit tests for `MediatorBackgroundTask` to ensure proper start and stop behavior. - Refactored `BackgroundCommandSenderHostedService` to utilize `BackgroundCommandProcessor`. - Introduced 'elsa-roadmap-refresh' skill configuration for roadmap updates. * Address workflow type resolution review feedback * Address follow-up review feedback * Restore recent console logs execute path * Address Copilot follow-up review * Decouple workflow JSON aliases from expressions * Fix workflow management unit test setup * Fix console logs recent endpoint handler shape * Respect workflow JSON strict type aliases * Remove unused console log contracts reference * Address Copilot review feedback * Address Copilot follow-up comments * Synchronize ring buffer dropped count * Address background processor strategy replay
2026-05-30 20:52:01 +00:00
# Elsa Diagnostics OpenTelemetry
Provides the OpenTelemetry diagnostics collector surface for Elsa hosts.
This module owns the Core-side OTEL contracts, HTTP/protobuf ingestion, bounded in-memory diagnostics store, feature registration, permissions, read APIs, live update hub, and collector metadata that Studio consumes.
## Scope
`Elsa.Diagnostics.OpenTelemetry` is collector/read-side diagnostics infrastructure. It does not create workflow spans, mutate `Activity.Current`, export telemetry to vendors, or provide durable OpenTelemetry persistence. Workflow telemetry production remains owned by existing `Elsa.Workflows` `ActivitySource` and `Meter` instrumentation.
The historical `Elsa.OpenTelemetry` module from `elsa-extensions` is intentionally not ported into this feature. It is producer-side workflow tracing middleware, duplicates current `Elsa.Workflows` instrumentation, and mutates `Activity.Current`; this module is collector/read-side diagnostics infrastructure.
## Routes
OTLP HTTP/protobuf ingestion is exposed under `OpenTelemetryDiagnosticsOptions.HttpEndpointPath`, which defaults to `/elsa/otlp/v1`:
- `POST /elsa/otlp/v1/traces`
- `POST /elsa/otlp/v1/metrics`
- `POST /elsa/otlp/v1/logs`
Diagnostics read APIs are exposed through Elsa API endpoints:
- `POST /diagnostics/opentelemetry/resources/search`
- `POST /diagnostics/opentelemetry/traces/search`
- `GET /diagnostics/opentelemetry/traces/{traceId}`
- `POST /diagnostics/opentelemetry/metrics/search`
- `POST /diagnostics/opentelemetry/logs/search`
- `GET /diagnostics/opentelemetry/storage`
- `GET /diagnostics/opentelemetry/collector-configuration`
Live updates are exposed through SignalR at `OpenTelemetryDiagnosticsOptions.HubRoute`, which defaults to `/elsa/hubs/diagnostics/opentelemetry`.
## Security
All diagnostics read APIs require the OpenTelemetry diagnostics read permission. OTLP ingestion allows unauthenticated loopback traffic by default for local development only when no API key is configured. When `OpenTelemetryDiagnosticsOptions.ApiKey` is set, every sender must provide the configured API key header, including loopback senders.
Collector configuration returns endpoint and required-header names only. It never returns secret header values.
## Storage
The default provider is bounded in-memory storage. Capacity options cover traces, spans, metric points, OTLP log records, and live subscriber queues. When a buffer exceeds capacity, the oldest item for that signal is dropped and diagnostics counters are incremented.