Workaround to use prometheus_client multiprocess mode (for e.g. gunicorn, celery) with opentelemetry, where this model currently is not supported, and not even employing an additional otel collector currently solves this.
This package provides a customized MeterProvider, that uses the native prometheus_client metrics implementations, and thus their mechanisms for exporting/exposition (and not the opentelemetry ones).
Usage
See Multiprocess Mode Documentation for details on how to operate this.
Set environment variable PROMETHEUS_MULTIPROC_DIR to a directory where prometheus_client can store its metrics state files (that are shared between processes via mmap).
Configure opentelemetry meter provider:
from opentelemetry.sdk.extension.prometheus_multiprocess import PrometheusMeterProvider import opentelemetry.metrics provider = PrometheusMeterProvider() opentelemetry.metrics.set_meter_provider(provider)
Set up prometheus metrics exposition, for example:
registry = prometheus_client.CollectorRegistry() prometheus_client.multiprocess.MultiProcessCollector(registry) prometheus_client.start_http_server(8080, registry=registry)
(The package also provides a MultiProcessRegistry to streamline this setup.)
Use opentelemetry metrics like normal:
meter = opentelemetry.metrics.get_meter('mypackage', 'myversion') HTTP_DURATION = metrics.create_histogram('http.client.duration', unit='ms') from timeit import default_timer start = default_timer() # perform request here duration = (default_timer() - start) * 1000 HTTP_DURATION.record(duration, {'http.response.status_code': 200})
Changelog
opentelemetry-sdk-extension-prometheus-multiprocess 1.4.0 (2026-04-17)
Changes
Prevent unbounded growth of label consistency check state (labels)
opentelemetry-sdk-extension-prometheus-multiprocess 1.3.0 (2026-04-13)
Changes
Ignore otel sdk internal metrics, they use async/observable collection, which we do not support (otel)
1.2.3 (2025-02-06)
Changes
More updates to otel 1.30 API (otel)
1.2.2 (2025-02-05)
Changes
More updates to otel 1.30 API (otel)
1.2.1 (2025-02-05)
Changes
Update to otel 1.30 API (otel)
1.2.0 (2024-12-20)
Changes
Support seconds as well as milliseconds in histogram buckets (histogram)
1.1.2 (2024-11-07)
Changes
otel: Update to otel 1.28 API (otel)
1.1.1 (2024-11-07)
Changes
Accept kw to make otel API forward-compatible (fwcompat)
1.1.0 (2024-06-25)
Changes
naming: Conform to prometheus metric name and unit conventions (naming)
1.0.0 (2024-04-26)
Changes
Initial release (initial)
1 maintainer
Metadata
1 maintainer
Release files for opentelemetry-sdk-extension-prometheus-multiprocess 1.4.0
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Release files / opentelemetry_sdk_extension_prometheus_multiprocess-1.4.0.tar.gz
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