Dash0 OpenTelemetry Python Distro

The Dash0 distribution of OpenTelemetry for Python: a small, opinionated layer on top of upstream OpenTelemetry that instruments a Python application with no code changes and exports over OTLP using a pure-Python protobuf implementation — no google.protobuf/grpcio native dependencies.

Removing the native dependency is the whole point: it makes the distribution safe to inject into an arbitrary process' PYTHONPATH (for example from a Kubernetes injector or operator) without risking ABI or version conflicts with the target application. It is the Python counterpart of the Dash0 OpenTelemetry distribution for Node.js.

This repository is a uv workspace containing the distribution and the pure-Python OTLP exporter packages it builds on.

What you get

• Zero-code instrumentation via opentelemetry-instrument (or an injector): the distribution's Dash0Distro and Dash0Configurator are discovered through OpenTelemetry entry points and wire up the SDK before your application starts.
• The full contrib instrumentation set built in: every upstream auto-instrumentation package (plus the X-Ray propagator) ships as a pinned dependency, so no opentelemetry-bootstrap step is needed and only instrumentations whose target library is installed activate.
• Pure-Python OTLP export with no google.protobuf/grpcio dependency: OTLP/HTTP (otlp_proto_http) selected by default for all three signals, OTLP/gRPC (otlp_proto_grpc) when OTEL_EXPORTER_OTLP_PROTOCOL=grpc (or a per-signal OTEL_EXPORTER_OTLP_<SIGNAL>_PROTOCOL) is set.
• Sensible, injection-friendly defaults: enable/disable gate, a required collector endpoint, a Kubernetes pod-UID resource detector, a service-name fallback, a telemetry.distro.name marker, an optional startup span, and graceful flushing on SIGTERM/SIGINT.
• An injector-ready bootstrap script: the wheel ships the sitecustomize.py that the OpenTelemetry injector triggers via PYTHONPATH (dash0/opentelemetry/injector/sitecustomize.py), with interpreter-version, double-instrumentation, and dependency-conflict guards and graceful self-deactivation; see the package README for the deployment contract.
• Defensive instrumentation loading: a single failing instrumentor is logged and skipped rather than aborting instrumentation of the whole process.

Architecture

packages/
  dash0-opentelemetry/                      the distribution (distro + configurator)
  dash0-opentelemetry-pyproto/                    pure-Python protobuf message classes
  dash0-opentelemetry-exporter-otlp-pyproto-common/   shared OTLP encoding
  dash0-opentelemetry-exporter-otlp-pyproto-http/     pure-Python OTLP/HTTP exporter (default)
  dash0-opentelemetry-exporter-otlp-pyproto-grpc/     pure-Python OTLP/gRPC exporter
examples/
  dash0-distro-flask/                       self-contained, Docker-based demo

The pyproto exporters are drop-ins for the upstream opentelemetry-exporter-otlp-proto-http and -grpc packages: they occupy the same import namespaces and register under the same otlp_proto_http / otlp_proto_grpc entry-point names. Because the distribution depends on the pyproto packages (and not the regular ones), the standard names resolve to the pure-Python implementations.

The directories keep their upstream names, but the packages are published as dash0-opentelemetry-pyproto and dash0-opentelemetry-exporter-otlp-pyproto-{common,http,grpc}: the opentelemetry-* distribution names belong to the upstream OpenTelemetry project, which has not released these packages yet. Once it does, the distribution will depend on the official releases and deprecate the renamed copies.

Quick start

The distribution is activated by opentelemetry-instrument; the application needs no OpenTelemetry code. At minimum, point it at a collector:

export DASH0_OTEL_COLLECTOR_BASE_URL=http://localhost:4318
opentelemetry-instrument python app.py

That is enough to auto-instrument installed libraries and export traces, metrics, and logs over OTLP/HTTP. To send directly to Dash0 instead of a local collector, use the Dash0 ingress URL and add the auth header:

export DASH0_OTEL_COLLECTOR_BASE_URL=https://ingress.<region>.<cloud>.dash0.com
export OTEL_EXPORTER_OTLP_HEADERS="Authorization=Bearer $DASH0_AUTH_TOKEN,Dash0-Dataset=default"
opentelemetry-instrument python app.py

See examples/dash0-distro-flask for a complete, runnable demo (local collector and Dash0 ingress), including how to view the data in the Dash0 UI.

Configuration

Environment variable	Effect
DASH0_OTEL_COLLECTOR_BASE_URL (required)	OTLP endpoint to export to. If unset, the distribution disables itself.
DASH0_DISABLE	true disables the distribution entirely (SDK becomes a no-op).
DASH0_AUTOMATIC_SERVICE_NAME	false opts out of the entrypoint-derived service.name fallback.
DASH0_BOOTSTRAP_SPAN	Emit a single span with this name once at startup.
DASH0_FLUSH_ON_SIGTERM_SIGINT	true flushes telemetry on SIGTERM/SIGINT before exiting.

Standard OTEL_* variables are honored as usual; the distribution only sets defaults (with setdefault) and never overrides values you provide.

Installation

Releases are published on public PyPI and on the Dash0 package index (a static PEP 503 simple index on GitHub Pages):

pip install dash0-opentelemetry

The Dash0 index hosts the full set of workspace packages (including the vendored pyproto exporters) and remains the authoritative source for production consumers that install with --require-hashes and --only-binary :all:; see the consumer contract in RELEASING.rst.

For development, consume the workspace directly:

uv sync --package dash0-opentelemetry

Development

See CONTRIBUTING.rst for local setup, running the tests, and linting. Release process and open publishing decisions live in RELEASING.rst.

License

Apache License 2.0. See LICENSE.