Prepare otel-collector and grafana with loki

[n0str]

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[Copilot]

Pull request overview

This PR adds a local Loki + Grafana + OpenTelemetry Collector stack for centralized log collection and visualization, with optional Grafana Cloud Loki support. It wires the services into docker-compose, provides Loki and Grafana configuration, and documents how to enable/use the logging pipeline.

Changes:

• Add an OpenTelemetry Collector configuration to receive OTLP logs, enrich them with IDs and resource labels, and export them to Loki (local or Grafana Cloud).
• Add Loki and Grafana services (with provisioning for a Loki datasource and a “Collector Logs” dashboard) to docker-compose.yml, plus data directories and ignore rules.
• Extend .env.sample and README.md with Loki/Grafana-related environment variables and setup instructions for both local Loki and Grafana Cloud Loki.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
loki/otel-collector/config.yml	Defines OTEL Collector pipeline for logs, adding log_id and resource labels and exporting to Loki with optional Grafana Cloud auth.
loki/grafana/provisioning/datasources/loki.yml	Provisions a default Grafana Loki datasource pointing at the local Loki service.
loki/grafana/provisioning/dashboards/dashboards.yml	Configures Grafana to load dashboards from the mounted dashboards directory.
loki/grafana/provisioning/dashboards/collector-logs.json	Adds a prebuilt “Collector Logs” Grafana dashboard with table and log detail panels driven by Loki queries and a log_id filter.
loki/grafana/data/.gitkeep	Ensures the Grafana data directory is versioned while remaining empty by default.
loki/grafana/.gitignore	Ignores Grafana runtime data while keeping the .gitkeep placeholder.
loki/data/.gitkeep	Ensures Loki’s data directory exists in the repo.
loki/config/loki.yml	Adds a single-node Loki configuration using filesystem storage, TSDB schema v13, WAL, and basic retention settings.
loki/.gitignore	Ignores Loki runtime data while keeping the .gitkeep placeholder.
docker-compose.yml	Adds loki, otel-collector, and grafana services, wiring configs, ports, and volumes into the existing stack.
README.md	Documents the new logging stack, including local Loki vs Grafana Cloud Loki setup instructions and access details for Grafana.
.env.sample	Introduces Loki/Grafana-related environment variables and example values for local and Grafana Cloud Loki setups.

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