Chunk 2.0

In this chunk, the assistant focused on debugging and enhancing the test cluster for the horizontally scalable S3 architecture. After identifying that both Kuri nodes were crashing due to a Go 1.22 HTTP route conflict between `HEAD /` and `GET /healthz`, the assistant replaced the standard `ServeMux` with a custom handler. The web UI container (port 9010) was fixed by replacing a placeholder with an Nginx reverse proxy to kuri-1, and a second proxy was added for kuri-2 on port 9011. The S3 proxy (port 8078) initially returned internal server errors because the S3Objects table lacked the `node_id` column; the assistant manually created the corrected table in YugabyteDB and updated the `docker-compose.yml` db-init to ensure proper schema creation. The proxy was also updated to auto-inject the `X-Amz-Content-Sha256` header for unsigned PUT requests. The assistant then implemented real cluster monitoring metrics. A new `ClusterMetrics` collector in `rbstor/cluster_metrics.go` tracks throughput, latency, error rates, active requests, and I/O bytes with a rolling 10‑minute window. The `ClusterTopology` RPC was upgraded to parse `FGW_BACKEND_NODES` and perform health checks on each storage node. JSON tags were added to all cluster monitoring structs to ensure camelCase serialization (matching the React frontend expectations). Finally, the frontend was enhanced: `ClusterTopology.js` now visually distinguishes S3 frontend proxies (blue) from Kuri storage nodes (green), a new `IOThroughputChart.js` component displays I/O bytes over time, and the `Cluster.js` layout was restructured with a two‑column grid for better data presentation. Both web UIs now return live metrics, and the cluster monitoring dashboard is fully functional. Themes include debugging container/infrastructure issues (route conflicts, missing columns, proxy header handling), implementing a scalable multi‑node monitoring system with real‑time metrics, and improving frontend UX to clearly differentiate node roles and visualize I/O performance. The overall progress moves the test cluster from a broken state to a working, observable distributed S3 gateway.

From Broken Containers to Living Dashboard: The Full Arc of Debugging and Observability in a Distributed S3 Cluster 3802 words

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