infra: drop OTel collector container — backend hosts OTLP directly (HOL-21) - #104
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…OL-21)
The OTel collector container was a SaaS-shaped multi-protocol relay
(fluentforward, syslog, AWS Firehose CloudWatch, OTLP gRPC/HTTP/HTTPS,
TCP log) that for self-hosted deployments only delivers OTLP HTTP value
the backend already provides natively.
The .NET backend has a complete OTLP HTTP receiver at /otel/v1/{logs,
traces,metrics}: JSON + protobuf, gzip + snappy decompression, CORS-
enabled, project-id resolution from resource attributes. Self-
instrumentation already targets it directly. SDKs just needed their
default OTLP endpoint pointed at it.
Removed:
- compose.yml + compose.hobby-dotnet.yml: collector service
- infra/docker/{collector.Dockerfile, collector.yml, configure-collector.sh}
- start-infra.sh: collector from SERVICES list
- .env.example: OTEL_COLLECTOR_* image vars
- env.sh: collector hostname rewrites
Updated SDK + frontend defaults from :4318 (collector) to :8082/otel
(backend):
- sdk/highlight-run/src/index.tsx: otlpEndpoint default
- compose.hobby-dotnet.yml + compose.dev-frontend.yml: REACT_APP_OTLP_ENDPOINT
- env.sh: OTLP_DOGFOOD_ENDPOINT, OTLP_ENDPOINT
Verified: docker compose ps now shows 7 HoldFast containers (was 9
before HOL-19+HOL-21). Smoke test passes end-to-end.
Subtask of HOL-17. Closes HOL-21.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Replaces #100 (auto-closed when its predecessor's base branch was deleted during the LEAN-stack merge train).
Summary
Drops the OTel collector container from the hobby compose. Backend now hosts the OTLP receiver directly at
/otel/v1/{logs,traces,metrics}. SDKs targethttp://backend:8082/otel.Closes HOL-21.
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