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docs: adopt the shared CueLABS Kafka bus in the system design - #263
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siyanbolagiggs1 wants to merge 4 commits into
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siyanbolagiggs1 wants to merge 4 commits into
siyanbolagiggs1 wants to merge 4 commits into
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Expendit, Apparule and Upstat share one Aiven Kafka service (boss, 2026-10-13), under the CueLABS delivery standard's shared-messaging.md: three lanes (cuelabs.uploads/requests/results), per-product event types, pointer-only payloads, no compacted topics, one Kafka user per product, and Expendit as the keep-alive owner. Added word for word in all three products' cross-cutting decisions.
The [Proposed] system design draft, awaiting the boss's ratification, with the 2026-10-13 shared-bus amendment (decisions.md X-11): this product's events on the CueLABS lanes (cuelabs.uploads/requests/results), pointer-only payloads, no compacted topics, and the sections that need rework before ratification.
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Summary
Upstat shares one Kafka service with Expendit and Apparule. This PR records
that decision and adds the proposed system design, amended to fit it.
docs/decisions.md: adds X-11 Shared message bus, identical inall three products. Expendit is the keep-alive owner; Upstat runs no
heartbeat or watchdog.
docs/system-design.md(new, [Proposed], awaiting ratification),with a shared-bus amendment:
ClickHouse, for traces, logs, metrics, product events and usage. The
Collector's persistent queue becomes the ClickHouse outage buffer.
upstat.config.changedreplace the7 compacted
config.*topics.upstat, consumer groupsupstat-<service>.gitignore: ignores local copies of the CueLABS skills and personalnotes.
main.Related issues
Closes #262
Type of change
Affected areas
api/common(Go)api/<service>webmobiledeploydocs/,.gitignoreChecklist
feat:,fix:,chore:…)..envfiles are committed.Rework needed before ratification (listed in the design's amendment): §5.3
ClickHouse loading, §6.1 monitor evaluation without 12-partition sharding,
§6.3–§6.4 ingest paths, §9.2 and §9.4 buffers and capacity, §10.1 Collector
scaling, and S-2, S-6, S-8.