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Showing content from https://opentelemetry.io/docs/zero-code/python/configuration below:

Agent Configuration | OpenTelemetry

The agent is highly configurable, either by:

• Passing configuration properties from the CLI
• Setting environment variables

Here’s an example of agent configuration via configuration properties:

opentelemetry-instrument \
    --traces_exporter console,otlp \
    --metrics_exporter console \
    --service_name your-service-name \
    --exporter_otlp_endpoint 0.0.0.0:4317 \
    python myapp.py

Here’s an explanation of what each configuration does:

• traces_exporter specifies which traces exporter to use. In this case, traces are being exported to console (stdout) and with otlp. The otlp option tells opentelemetry-instrument to send the traces to an endpoint that accepts OTLP via gRPC. In order to use HTTP instead of gRPC, add --exporter_otlp_protocol http/protobuf. The full list of available options for traces_exporter, see the Python contrib OpenTelemetry Instrumentation.
• metrics_exporter specifies which metrics exporter to use. In this case, metrics are being exported to console (stdout). It is currently required for your to specify a metrics exporter. If you aren’t exporting metrics, specify none as the value instead.
• service_name sets the name of the service associated with your telemetry, and is sent to your Observability backend.
• exporter_otlp_endpoint sets the endpoint where telemetry is exported to. If omitted, the default Collector endpoint will be used, which is 0.0.0.0:4317 for gRPC and 0.0.0.0:4318 for HTTP.
• exporter_otlp_headers is required depending on your chosen Observability backend. For more information on OTLP exporter headers, see OTEL_EXPORTER_OTLP_HEADERS.

In some cases, configuring via environment variables is more preferred. Any setting configurable with a command-line argument can also be configured with an Environment Variable.

You can apply the following steps to determine the correct name mapping of the desired configuration property:

• Convert the configuration property to uppercase.
• Prefix environment variable with OTEL_

For example, exporter_otlp_endpoint would convert to OTEL_EXPORTER_OTLP_ENDPOINT.

There are some Python specific configuration options you can set by prefixing environment variables with OTEL_PYTHON_.

Comma-separated regular expressions representing which URLs to exclude across all instrumentations:

• OTEL_PYTHON_EXCLUDED_URLS

You can also exclude URLs for specific instrumentations by using a variable OTEL_PYTHON_<library>_EXCLUDED_URLS, where library is the uppercase version of one of the following: Django, Falcon, FastAPI, Flask, Pyramid, Requests, Starlette, Tornado, urllib, urllib3.

Examples:

export OTEL_PYTHON_EXCLUDED_URLS="client/.*/info,healthcheck"
export OTEL_PYTHON_URLLIB3_EXCLUDED_URLS="client/.*/info"
export OTEL_PYTHON_REQUESTS_EXCLUDED_URLS="healthcheck"

Comma-separated list of names that will be extracted from the request object and set as attributes on spans.

• OTEL_PYTHON_DJANGO_TRACED_REQUEST_ATTRS
• OTEL_PYTHON_FALCON_TRACED_REQUEST_ATTRS
• OTEL_PYTHON_TORNADO_TRACED_REQUEST_ATTRS

Examples:

export OTEL_PYTHON_DJANGO_TRACED_REQUEST_ATTRS='path_info,content_type'
export OTEL_PYTHON_FALCON_TRACED_REQUEST_ATTRS='query_string,uri_template'
export OTEL_PYTHON_TORNADO_TRACED_REQUEST_ATTRS='uri,query'

There are some configuration options used to control the logs that are outputted.

• OTEL_PYTHON_LOG_CORRELATION: to enable trace context injection into logs (true, false)
• OTEL_PYTHON_LOG_FORMAT: to instruct the instrumentation to use a custom logging format
• OTEL_PYTHON_LOG_LEVEL: to set a custom log level (info, error, debug, warning)
• OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED: to enable auto-instrumentation of logs. Attaches OTLP handler to Python root logger. For an example, see Logs Auto-Instrumentation.

Examples:

export OTEL_PYTHON_LOG_CORRELATION=true
export OTEL_PYTHON_LOG_FORMAT="%(msg)s [span_id=%(span_id)s]"
export OTEL_PYTHON_LOG_LEVEL=debug
export OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED=true

There are some more configuration options that can be set that don’t fall into a specific category.

• OTEL_PYTHON_DJANGO_INSTRUMENT: set to false to disable the default enabled state for the Django instrumentation
• OTEL_PYTHON_ELASTICSEARCH_NAME_PREFIX: changes the default prefixes for Elasticsearch operation names from “Elasticsearch” to whatever is used here
• OTEL_PYTHON_GRPC_EXCLUDED_SERVICES: comma-separated list of specific services to exclude for the gRPC instrumentation
• OTEL_PYTHON_ID_GENERATOR: to specify which IDs generator to use for the global Tracer Provider
• OTEL_PYTHON_INSTRUMENTATION_SANITIZE_REDIS: to enable query sanitization

Examples:

export OTEL_PYTHON_DJANGO_INSTRUMENT=false
export OTEL_PYTHON_ELASTICSEARCH_NAME_PREFIX=my-custom-prefix
export OTEL_PYTHON_GRPC_EXCLUDED_SERVICES="GRPCTestServer,GRPCHealthServer"
export OTEL_PYTHON_ID_GENERATOR=xray
export OTEL_PYTHON_INSTRUMENTATION_SANITIZE_REDIS=true

The Python agent by default will detect a Python program’s packages and instrument any packages it can. This makes instrumentation easy, but can result in too much or unwanted data.

You can omit specific packages from instrumentation by using the OTEL_PYTHON_DISABLED_INSTRUMENTATIONS environment variable. The environment variable can be set to a comma-separated list of instrumentations entry point names to exclude from instrumentation. Most of the time the entry point name is the same as the package name and it is set in the project.entry-points.opentelemetry_instrumentor table in the package pyproject.toml file.

For example, if your Python program uses the redis,kafka-python and grpc packages, by default the agent will use the opentelemetry-instrumentation-redis, opentelemetry-instrumentation-kafka-python and opentelemetry-instrumentation-grpc packages to instrument them. To disable this, you can set OTEL_PYTHON_DISABLED_INSTRUMENTATIONS=redis,kafka,grpc_client.

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