feat: integrate grafana loki#61
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Dejmenek merged 5 commits intoMay 15, 2026
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Expanded README to include Loki as part of the observability stack alongside Prometheus and Grafana. Clarified that the API exports logs to Loki via Serilog's OpenTelemetry sink. Updated Docker Compose service list and Grafana setup instructions to include Loki as a data source.
Added a complete loki.yml for deploying Loki with filesystem-based storage. Config disables authentication, enables structured metadata, sets server to listen on port 3100, uses in-memory ring for single-instance mode, and configures TSDB schema with local directories for index and chunk storage under /tmp/loki.
Added Serilog.AspNetCore, Serilog.Extensions.Logging, and Serilog.Sinks.OpenTelemetry to project dependencies for enhanced logging and OpenTelemetry export support. Updated packages.lock.json with all required transitive dependencies. No packages were removed or downgraded.
Added a Loki service using the grafana/loki:latest image to docker-compose.yml. The service exposes port 3100, mounts configuration and data volumes, and uses a custom config file. Also introduced a named Docker volume for Loki data persistence.
Switched to .CreateBootstrapLogger() for early logging during startup. Integrated Serilog.Sinks.OpenTelemetry to export logs to an OTLP endpoint (http://localhost:3100/otlp) using HTTP Protobuf protocol. Set the service name to "TournamentAPI" for log resource attributes. Added the required using statement for Serilog.Sinks.OpenTelemetry.
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Summary
This PR adds Loki to the observability stack and configures the API to export logs to Loki via Serilog's OpenTelemetry sink. Documentation is updated to reflect these changes.
Changes
docker-compose.ymland newloki.yml: Add and configure Loki service for log aggregation.Program.cs: Configure Serilog to export logs to Loki using the OTLP protocol.TournamentAPI.csprojand central package files: Add Serilog OpenTelemetry sink and related dependencies.README.md: Update instructions and documentation for Loki integration and Grafana data sources.