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feat(compat): add vendor compatibility translation edge
Adds compat/ package and docker-compose.compat.yml overlay that accepts telemetry from Datadog, Jaeger (legacy wire protocol), and Splunk HEC agents and forwards OTLP to the base observability-stack collector. Includes customer-facing documentation under docs/starlight-docs. Architecture: dedicated otel-collector-compat edge collector runs the upstream collector-contrib receivers for each vendor, batches, and forwards OTLP to the base collector — which handles all existing processor/exporter logic unchanged. No drift risk with the base config. Modern OTel-SDK apps (including Jaeger v1.42+) bypass the compat hop and send OTLP directly to the base collector. Activation uses the repo's existing INCLUDE_COMPOSE_* convention: echo 'INCLUDE_COMPOSE_COMPAT=docker-compose.compat.yml' >> .env docker compose up -d Pipelines wired into compat collector: - traces: [datadog, jaeger] - metrics: [datadog, statsd, splunk_hec] - logs: [datadog, splunk_hec] Public documentation added under /docs/send-data/from-vendor/: - index.md (overview + architecture + quickstart) - datadog.md, jaeger.md, splunk.md (per-vendor migration guides) - 'From Vendor Agents' sidebar entry added via astro.config.mjs - Link added from /docs/send-data/ overview Scope and framing: - This is protocol-compatible ingest, not a 1:1 vendor platform replacement. - We defer to upstream collector-contrib READMEs and vendor documentation for attribute schemas and translation behavior. The vendor pages here document only 3-5 canonical attributes per vendor and link out to the authoritative sources. - Component receivers have varying stability tiers upstream (alpha/beta/ development). Vendor pages document the specifics. SignalFx deliberately omitted — upstream signalfxreceiver was deprecated 2026-02-13 with explicit guidance to migrate to OTLP. Bundles Jaeger's hotrod demo on port 8080 as a built-in OTLP trace generator (Jaeger's canonical demo, pointed at the base collector). Validated: starlight-docs astro build passes with all internal links valid (115 pages built successfully). Signed-off-by: Kyle Hounslow <kylhouns@amazon.com>
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‎compat/README.md‎

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# Vendor Compatibility Overlay
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User-facing migration guides: https://observability.opensearch.org/docs/send-data/from-vendor/
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This overlay adds a dedicated OpenTelemetry Collector that accepts Datadog, Jaeger, and Splunk HEC wire protocols, translates them to OTLP, and forwards to the base collector. No application code changes are required — vendor agents are pointed at observability-stack by changing an endpoint URL.
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## Do I need this overlay?
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| If your apps emit... | Need this overlay? |
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|----------------------|--------------------|
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| OpenTelemetry OTLP (gRPC or HTTP) | No. Send directly to the base collector on 4317 or 4318. |
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| Datadog (dd-trace-*, DogStatsD) | Yes. |
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| Jaeger native wire protocol (`jaeger-client-*`) | Yes. |
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| Splunk HEC | Yes. |
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| Jaeger via modern OpenTelemetry SDK + OTLP | No. |
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## Architecture
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```
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vendor agents ──▶ otel-collector-compat ──OTLP──▶ otel-collector (base, unchanged) ──▶ Data Prepper / Prometheus ──▶ OpenSearch
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(this overlay)
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OTLP apps ─────────────────────────────────▶ (direct to base, no compat hop)
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```
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The compat collector uses upstream [`opentelemetry-collector-contrib`](https://github.com/open-telemetry/opentelemetry-collector-contrib) receivers. All enrichment and downstream routing happens in the base pipeline — the compat config is purely ingest + forward.
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## Activation
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```bash
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echo "INCLUDE_COMPOSE_COMPAT=docker-compose.compat.yml" >> .env
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docker compose up -d
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```
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Adds `otel-collector-compat` and the bundled Jaeger `hotrod` demo to the stack.
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### Verify it's running
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```bash
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docker compose ps otel-collector-compat
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curl -sI http://localhost:8126/info # HTTP 200 = Datadog receiver is live
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```
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## Supported vendors
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| Vendor | Receiver(s) | Default ports | Repo notes |
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|--------|-------------|---------------|------------|
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| Datadog | `datadogreceiver`, `statsdreceiver` | 8126/tcp, 8125/udp | [vendors/datadog/](vendors/datadog/) |
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| Jaeger (legacy wire protocol) | `jaegerreceiver` | 14250/tcp, 14268/tcp | [vendors/jaeger/](vendors/jaeger/) |
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| Splunk HEC | `splunkhecreceiver` | 8088/tcp | [vendors/splunk/](vendors/splunk/) |
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User-facing migration guides live at https://observability.opensearch.org/docs/send-data/from-vendor/.
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SignalFx is not supported. The upstream `signalfxreceiver` is deprecated with explicit guidance to migrate to OTLP.
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## Deployment modes
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Each vendor supports greenfield, side-by-side, and full-replacement modes. See the public migration guide for each vendor for specifics.
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## Port customization
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Ports are remappable via environment variables. Useful when a real vendor agent already occupies the default port on the host.
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| Variable | Default | Receiver |
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|----------|---------|----------|
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| `COMPAT_DATADOG_APM_PORT` | 8126 | Datadog trace-agent |
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| `COMPAT_DATADOG_STATSD_PORT` | 8125 | DogStatsD |
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| `COMPAT_JAEGER_GRPC_PORT` | 14250 | Jaeger gRPC |
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| `COMPAT_JAEGER_THRIFT_HTTP_PORT` | 14268 | Jaeger Thrift HTTP |
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| `COMPAT_SPLUNK_HEC_PORT` | 8088 | Splunk HEC |
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| `COMPAT_COLLECTOR_MEMORY_LIMIT` | 256M | Compat collector memory limit |
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## Attribute translation
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Each receiver translates vendor-specific data to the OpenTelemetry data model. Translation behavior is defined by the upstream receivers. For schema details, consult:
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- The upstream receiver READMEs under [`opentelemetry-collector-contrib/receiver/`](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver)
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- The vendor's own instrumentation and tagging documentation
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## Directory layout
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```
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compat/
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├── README.md ← this file
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├── collector/
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│ ├── config.compat.yaml ← compat collector config
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│ └── README.md ← compat collector design notes
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└── vendors/
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├── datadog/README.md ← developer notes + link to migration guide
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├── jaeger/README.md
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└── splunk/README.md
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docker-compose.compat.yml ← overlay service definitions
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```
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## Adding a vendor
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1. Create `vendors/<name>/README.md` with a link to the (forthcoming) public migration guide and developer notes (receiver used, config location, quick local test).
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2. Add the receiver stanza to `collector/config.compat.yaml` and wire it into the appropriate pipeline(s).
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3. Add port mappings to `docker-compose.compat.yml`.
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4. Add a page at `docs/starlight-docs/src/content/docs/send-data/from-vendor/<name>.md` with the user migration guide.
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5. Verify end-to-end: send vendor-format data → confirm it lands in OpenSearch.

‎compat/collector/README.md‎

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# Compat Collector Config
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`config.compat.yaml` configures `otel-collector-compat`, an edge collector that runs when the compat overlay is active.
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## Role
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Accepts vendor wire protocols (Datadog, Jaeger, Splunk HEC) on their native ports, translates to the OTLP data model via upstream `opentelemetry-collector-contrib` receivers, and forwards OTLP to the base collector. All enrichment, filtering, and downstream routing (Data Prepper, Prometheus, etc.) happens in the base collector config.
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```
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vendor apps ──▶ otel-collector-compat ──OTLP──▶ otel-collector (base)
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[this config] [unchanged]
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```
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The compat collector config contains only receivers, the `batch` processor, and an OTLP exporter pointed at the base collector. No transforms.
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## Receivers
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| Receiver | Config key | Pipelines | Default port | Upstream stability |
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|----------|-----------|-----------|--------------|--------------------|
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| Datadog APM | `datadog` | traces, metrics, logs | 8126/tcp | alpha |
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| DogStatsD | `statsd` | metrics | 8125/udp | beta |
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| Jaeger | `jaeger` | traces | 14250/grpc, 14268/http | beta |
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| Splunk HEC | `splunk_hec` | logs, metrics | 8088/tcp | beta |
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`splunk_hec` is wired into both logs and metrics pipelines — the upstream receiver routes events to the correct signal type based on payload contents.
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SignalFx is not supported. The upstream `signalfxreceiver` is deprecated; SignalFx customers should migrate to OTLP.
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## Pipelines
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```yaml
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service:
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pipelines:
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traces:
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receivers: [datadog, jaeger]
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processors: [batch]
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exporters: [otlp_grpc, debug]
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metrics:
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receivers: [datadog, statsd, splunk_hec]
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processors: [batch]
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exporters: [otlp_grpc, debug]
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logs:
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receivers: [datadog, splunk_hec]
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processors: [batch]
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exporters: [otlp_grpc, debug]
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```
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The `batch` processor reduces RPC volume against the base collector. No other processing.
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## Activation
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```bash
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echo "INCLUDE_COMPOSE_COMPAT=docker-compose.compat.yml" >> .env
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docker compose up -d
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```
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Docker Compose's `include:` directive reads the env var and pulls in the overlay, which adds `otel-collector-compat` as a new service.
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## Resource usage
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Default memory limit: 256MB, configurable via `COMPAT_COLLECTOR_MEMORY_LIMIT`. Idle usage is typically under 100MB.

‎compat/collector/config.compat.yaml‎

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# config.compat.yaml
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#
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# Edge collector config. Translates vendor wire protocols to OTLP and forwards
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# to the base collector, which handles enrichment and downstream export.
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#
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# vendor apps ──▶ otel-collector-compat ──OTLP──▶ otel-collector (base)
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# (this config) (unchanged)
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receivers:
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# Datadog trace-agent protocol. Also accepts metrics and logs endpoints;
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# all three are wired into the service pipelines below.
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# See: https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/datadogreceiver
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datadog:
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endpoint: 0.0.0.0:8126
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read_timeout: 60s
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trace_id_cache_size: 100
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# StatsD / DogStatsD over UDP.
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# See: https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/statsdreceiver
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statsd:
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endpoint: 0.0.0.0:8125
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aggregation_interval: 60s
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enable_metric_type: true
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is_monotonic_counter: false
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# Jaeger native wire protocol (Thrift HTTP + gRPC). For legacy
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# jaeger-client-* applications. Modern Jaeger apps emit OTLP and send
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# directly to the base collector on 4317/4318 without this hop.
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# See: https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/jaegerreceiver
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jaeger:
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protocols:
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grpc:
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endpoint: 0.0.0.0:14250
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thrift_http:
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endpoint: 0.0.0.0:14268
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# Splunk HTTP Event Collector (logs and metrics).
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# See: https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/splunkhecreceiver
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splunk_hec:
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endpoint: 0.0.0.0:8088
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processors:
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# Batch spans/events to reduce RPC volume against the base collector.
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batch:
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timeout: 10s
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send_batch_size: 1024
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exporters:
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# Forward to the base collector. Downstream routing (Data Prepper,
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# Prometheus, etc.) is configured there.
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otlp_grpc:
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endpoint: otel-collector:4317
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tls:
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insecure: true
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debug:
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verbosity: basic
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service:
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pipelines:
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traces:
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receivers: [datadog, jaeger]
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processors: [batch]
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exporters: [otlp_grpc, debug]
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metrics:
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receivers: [datadog, statsd, splunk_hec]
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processors: [batch]
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exporters: [otlp_grpc, debug]
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logs:
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receivers: [datadog, splunk_hec]
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processors: [batch]
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exporters: [otlp_grpc, debug]
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telemetry:
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logs:
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level: info

‎compat/vendors/datadog/README.md‎

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# Datadog
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Migration guide and user-facing documentation: https://observability.opensearch.org/docs/send-data/from-vendor/datadog/
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## Receivers used
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- [`datadogreceiver`](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/datadogreceiver) — traces, metrics, logs (8126/tcp)
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- [`statsdreceiver`](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/statsdreceiver) — DogStatsD (8125/udp)
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Config: [`../../collector/config.compat.yaml`](../../collector/config.compat.yaml) — `datadog:` and `statsd:` receiver blocks.
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## Quick local test
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```bash
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# DogStatsD metric
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echo "test.metric:1|c|#env:dev" | nc -u -w1 localhost 8125
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# HEC-style trace payload (msgpack) — see upstream receiver README for format details
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```
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Traces are best exercised by pointing a `dd-trace-*` SDK application at `localhost:8126`.

‎compat/vendors/jaeger/README.md‎

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# Jaeger
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Migration guide and user-facing documentation: https://observability.opensearch.org/docs/send-data/from-vendor/jaeger/
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Jaeger is an open-source CNCF project rather than a proprietary vendor. This directory exists because users migrating from Jaeger deployments typically look for it alongside other vendor integrations.
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## Receiver used
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- [`jaegerreceiver`](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/jaegerreceiver) — Jaeger native wire protocol (Thrift HTTP on 14268/tcp, gRPC on 14250/tcp)
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Config: [`../../collector/config.compat.yaml`](../../collector/config.compat.yaml) — `jaeger:` receiver block.
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Modern Jaeger apps emit OTLP natively and bypass this overlay. The bundled `hotrod` demo (port 8080) is configured this way and exercises the base collector directly.
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## Quick local test
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```bash
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# Trigger the bundled hotrod demo (OTLP path)
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curl http://localhost:8080/dispatch?customer=123
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# View traces at http://localhost:5601 → Trace Analytics
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```
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The legacy Thrift HTTP path is harder to exercise without a `jaeger-client-*` app. See the upstream receiver README for wire format details.

‎compat/vendors/splunk/README.md‎

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# Splunk HEC
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Migration guide and user-facing documentation: https://observability.opensearch.org/docs/send-data/from-vendor/splunk/
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## Receiver used
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- [`splunkhecreceiver`](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/splunkhecreceiver) — Splunk HTTP Event Collector (8088/tcp)
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Config: [`../../collector/config.compat.yaml`](../../collector/config.compat.yaml) — `splunk_hec:` receiver block.
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Wired into the logs and metrics pipelines. Traces are not wired in the default compat config.
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## Quick local test
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```bash
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curl -X POST http://localhost:8088/services/collector \
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-H "Authorization: Splunk any-token" \
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-H "Content-Type: application/json" \
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-d '{"event":"hello","sourcetype":"manual","source":"curl"}'
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# {"text": "Success", "code": 0}
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```
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Events land in OpenSearch under `logs-otel-v1-*`. View via Discover Logs in OpenSearch Dashboards.

‎docker-compose.compat.yml‎

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# docker-compose.compat.yml
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#
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# Vendor compatibility overlay. Adds an edge OTel Collector that accepts
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# Datadog, Jaeger, and Splunk HEC wire protocols and forwards OTLP to the
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# base collector.
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#
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# Activation:
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# echo "INCLUDE_COMPOSE_COMPAT=docker-compose.compat.yml" >> .env
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# docker compose up -d
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#
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# vendor apps ──▶ otel-collector-compat ──OTLP──▶ otel-collector (base)
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# (this overlay) (unchanged)
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services:
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otel-collector-compat:
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image: otel/opentelemetry-collector-contrib:${OTEL_COLLECTOR_VERSION}
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container_name: otel-collector-compat
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pull_policy: always
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command: ["--config=/etc/otelcol-config.yml"]
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volumes:
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- ./compat/collector/config.compat.yaml:/etc/otelcol-config.yml
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ports:
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# Datadog trace-agent (datadogreceiver)
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- "${COMPAT_DATADOG_APM_PORT:-8126}:8126"
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# DogStatsD (statsdreceiver, UDP)
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- "${COMPAT_DATADOG_STATSD_PORT:-8125}:8125/udp"
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# Jaeger native wire protocol. Modern Jaeger apps emit OTLP and should
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# send directly to the base collector on 4317/4318 instead of this hop.
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- "${COMPAT_JAEGER_GRPC_PORT:-14250}:14250"
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- "${COMPAT_JAEGER_THRIFT_HTTP_PORT:-14268}:14268"
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# Splunk HEC
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- "${COMPAT_SPLUNK_HEC_PORT:-8088}:8088"
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networks:
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- observability-stack-network
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restart: unless-stopped
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depends_on:
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- otel-collector
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deploy:
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resources:
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limits:
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memory: ${COMPAT_COLLECTOR_MEMORY_LIMIT:-256M}
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# Jaeger hotrod demo app. Emits OTLP directly to the base collector, so it
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# does not exercise the compat collector. Included as a built-in trace
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# generator for verifying the base pipeline end-to-end.
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#
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# http://localhost:8080 hotrod UI
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# http://localhost:5601 OpenSearch Dashboards → Trace Analytics
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hotrod:
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image: jaegertracing/example-hotrod:1.60
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container_name: hotrod
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environment:
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- OTEL_EXPORTER_OTLP_ENDPOINT=http://otel-collector:4318
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command: ["all"]
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networks:
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- observability-stack-network
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ports:
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- "8080:8080"
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depends_on:
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- otel-collector

‎docker-compose.yml‎

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- path: ${INCLUDE_COMPOSE_AGENT_EVAL_LLM:-docker-compose/util/docker-compose.empty.yml}
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- path: ${INCLUDE_COMPOSE_LOCAL_OPENSEARCH:-docker-compose/util/docker-compose.empty.yml}
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- path: ${INCLUDE_COMPOSE_LOCAL_OPENSEARCH_DASHBOARDS:-docker-compose/util/docker-compose.empty.yml}
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- path: ${INCLUDE_COMPOSE_COMPAT:-docker-compose/util/docker-compose.empty.yml}
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x-default-logging: &logging
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driver: "json-file"

‎docs/starlight-docs/astro.config.mjs‎

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label: 'Infrastructure',
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autogenerate: { directory: 'send-data/infrastructure' },
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},
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{
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label: 'From Vendor Agents',
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autogenerate: { directory: 'send-data/from-vendor' },
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},
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{
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label: 'Data Pipeline',
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autogenerate: { directory: 'send-data/data-pipeline' },

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