What is a Telemetry Pipeline?
A telemetry pipeline (or observability pipeline) collects, transforms, filters, enriches, and routes logs, metrics, and traces between sources and destinations — controlling cost and data quality in flight.
A telemetry pipeline (also called an observability pipeline) is the processing layer that sits between the systems producing telemetry and the destinations consuming it. Instead of shipping raw logs, metrics, and traces straight to a backend, a pipeline lets you filter, transform, enrich, redact, sample, and route data while it is in flight.
What a telemetry pipeline does
Typical pipeline stages:
- Collect — receive data from agents, SDKs, syslog, cloud services, or message queues
- Parse & transform — turn unstructured text into structured fields, normalize formats, convert units
- Filter & sample — drop health-check noise, debug logs, or apply trace sampling before paying to store them
- Enrich — add Kubernetes metadata, GeoIP, service ownership tags
- Redact — mask PII, secrets, and tokens for compliance before data leaves your boundary
- Route — send security events to a SIEM, everything to cheap object storage, and a filtered subset to real-time analytics
Why pipelines matter
Two forces made pipelines a distinct product category. First, cost: with per-GB ingest pricing, dropping 40% of low-value logs before ingestion is the single fastest way to cut an observability bill. Second, control: compliance teams need PII scrubbed in flight, and platform teams want to switch backends without re-instrumenting every service — a pipeline decouples producers from consumers.
Building one
The open-source path is the OpenTelemetry Collector, whose receiver → processor → exporter chains are telemetry pipelines by construction. Alternatives include Vector, Fluent Bit, and Logstash, plus commercial routing products. The trade-off is operating another tier of infrastructure at ingest scale.
Pipelines in OpenObserve
OpenObserve builds pipelines into the platform: real-time and scheduled pipelines can parse, transform (using VRL functions), redact, and route streams between sources and destinations — including forwarding to external systems — without deploying separate pipeline infrastructure. See the setup guide to build one in a few minutes.
Frequently asked questions
What is the difference between a telemetry pipeline and an observability pipeline?
They are the same concept under different names. Vendors also call them data pipelines or routing layers. All refer to a processing tier between telemetry producers (apps, agents) and consumers (observability backends, SIEMs, archives) that transforms and routes data in flight.
Why not send telemetry directly to the backend?
Direct shipping works at small scale. A pipeline becomes valuable when you need to cut cost (drop noisy logs before paying to ingest them), meet compliance requirements (redact PII in flight), reshape data (parse, enrich, convert formats), or route the same stream to multiple destinations such as a backend plus cold archive.
Is the OpenTelemetry Collector a telemetry pipeline?
Yes — the Collector's receiver → processor → exporter architecture is a telemetry pipeline, and it is the most common open-source way to build one. Managed platforms like OpenObserve also provide built-in pipeline capabilities so you can transform data without operating separate infrastructure.
Related terms
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