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LCORE-1826: Expose OpenTelemetry configuration in v1/config endpoint
Add observability configuration to the v1/config endpoint, exposing all OTEL_* environment variables to provide visibility into the active OpenTelemetry tracing setup. Signed-off-by: Anik Bhattacharjee <anbhatta@redhat.com>
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‎docs/devel_doc/openapi.json‎

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@@ -6753,6 +6753,14 @@
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}
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],
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"name": "lightspeed-stack",
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"observability": {
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"otel": {
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"OTEL_EXPORTER_OTLP_ENDPOINT": "",
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"OTEL_EXPORTER_OTLP_PROTOCOL": "",
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"OTEL_SDK_DISABLED": "true",
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"OTEL_SERVICE_NAME": ""
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}
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},
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"quota_handlers": {
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"enable_token_history": false,
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"limiters": [],
@@ -12367,6 +12375,11 @@
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"title": "Splunk configuration",
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"description": "Splunk HEC configuration for sending telemetry events."
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},
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"observability": {
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"$ref": "#/components/schemas/ObservabilityConfiguration",
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"title": "Observability configuration",
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"description": "OpenTelemetry and observability configuration collected from OTEL_* environment variables."
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},
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"deployment_environment": {
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"type": "string",
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"title": "Deployment environment",
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}
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],
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"name": "lightspeed-stack",
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"observability": {
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"otel": {
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"OTEL_EXPORTER_OTLP_ENDPOINT": "",
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"OTEL_EXPORTER_OTLP_PROTOCOL": "",
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"OTEL_SDK_DISABLED": "true",
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"OTEL_SERVICE_NAME": ""
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}
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},
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"quota_handlers": {
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"enable_token_history": false,
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"limiters": [],
@@ -15107,6 +15128,22 @@
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"title": "OAuthFlows",
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"description": "Defines the configuration for the supported OAuth 2.0 flows."
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},
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"ObservabilityConfiguration": {
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"properties": {
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"otel": {
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"additionalProperties": {
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"type": "string"
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},
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"type": "object",
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"title": "OpenTelemetry configuration",
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"description": "Active OpenTelemetry configuration from OTEL_* environment variables"
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}
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},
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"additionalProperties": false,
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"type": "object",
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"title": "ObservabilityConfiguration",
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"description": "OpenTelemetry observability configuration.\n\nThis configuration is automatically populated from OTEL_* environment variables\nto provide visibility into the active tracing setup.\n\nAttributes:\n otel: Dictionary of OTEL_* environment variables (excluding secrets)."
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},
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"OkpConfiguration": {
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"properties": {
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"rhokp_url": {

‎src/models/api/responses/successful/configuration.py‎

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@@ -87,6 +87,14 @@ class ConfigurationResponse(AbstractSuccessfulResponse):
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"scheduler": {"period": 1},
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"enable_token_history": False,
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},
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"observability": {
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"otel": {
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"OTEL_SDK_DISABLED": "true",
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"OTEL_EXPORTER_OTLP_ENDPOINT": "",
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"OTEL_EXPORTER_OTLP_PROTOCOL": "",
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"OTEL_SERVICE_NAME": "",
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}
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},
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}
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}
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]

‎src/models/config.py‎

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@@ -2,6 +2,7 @@
22

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# pylint: disable=too-many-lines
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import os
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import re
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from enum import Enum
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from functools import cached_property
@@ -2830,6 +2831,38 @@ def compiled_patterns(self) -> CompiledPatterns:
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return list(self._compiled_patterns)
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class ObservabilityConfiguration(ConfigurationBase):
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"""OpenTelemetry observability configuration.
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This configuration is automatically populated from OTEL_* environment variables
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to provide visibility into the active tracing setup.
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Attributes:
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otel: Dictionary of OTEL_* environment variables (excluding secrets).
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"""
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otel: dict[str, str] = Field(
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default_factory=dict,
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title="OpenTelemetry configuration",
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description="Active OpenTelemetry configuration from OTEL_* environment variables",
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)
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@classmethod
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def from_environment(cls) -> "ObservabilityConfiguration":
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"""Collect all OTEL_* environment variables from the environment.
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Returns:
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ObservabilityConfiguration with otel dict populated from environment.
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"""
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otel_vars = {}
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for key, value in os.environ.items():
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if key.startswith("OTEL_"):
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# Exclude sensitive variables that might contain tokens or keys
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# Currently no secret OTEL_ vars are used, but this is future-proof
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otel_vars[key] = value
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return cls(otel=otel_vars)
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class Configuration(ConfigurationBase):
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"""Global service configuration."""
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@@ -2991,6 +3024,13 @@ class Configuration(ConfigurationBase):
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description="Splunk HEC configuration for sending telemetry events.",
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)
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observability: ObservabilityConfiguration = Field(
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default_factory=ObservabilityConfiguration.from_environment,
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title="Observability configuration",
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description="OpenTelemetry and observability configuration collected "
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"from OTEL_* environment variables.",
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)
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deployment_environment: str = Field(
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"development",
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title="Deployment environment",

‎tests/integration/endpoints/test_config_integration.py‎

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"""Integration tests for the /config endpoint."""
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import os
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from typing import cast
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import pytest
@@ -88,3 +89,79 @@ async def test_config_endpoint_fails_without_configuration(
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assert "response" in exc_info.value.detail
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detail = cast(dict[str, str], exc_info.value.detail)
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assert "configuration is not loaded" in detail["response"].lower()
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@pytest.mark.asyncio
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async def test_config_endpoint_includes_observability(
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current_config: AppConfig, # pylint: disable=unused-argument
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test_request: Request,
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test_auth: AuthTuple,
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) -> None:
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"""Test that config endpoint includes observability configuration.
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This integration test verifies:
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- Observability field is present in the configuration response
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- OTEL environment variables are correctly collected
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- Response structure includes observability.otel block
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Parameters:
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----------
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current_config (AppConfig): Loads root configuration
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test_request (Request): FastAPI request
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test_auth (AuthTuple): noop authentication tuple
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"""
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response = await config_endpoint_handler(auth=test_auth, request=test_request)
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# Verify observability field exists
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assert hasattr(response.configuration, "observability")
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assert response.configuration.observability is not None
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# Verify otel field exists
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assert hasattr(response.configuration.observability, "otel")
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assert isinstance(response.configuration.observability.otel, dict)
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@pytest.mark.asyncio
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async def test_config_endpoint_observability_collects_otel_vars(
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current_config: AppConfig, # pylint: disable=unused-argument
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test_request: Request, # pylint: disable=unused-argument
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test_auth: AuthTuple, # pylint: disable=unused-argument
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monkeypatch: pytest.MonkeyPatch,
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) -> None:
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"""Test that observability config collects OTEL_* environment variables.
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This integration test verifies:
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- OTEL_* environment variables are collected into observability.otel
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- Non-OTEL variables are not included
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- Environment variables set at runtime are reflected in config
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Parameters:
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----------
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current_config (AppConfig): Loads root configuration
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test_request (Request): FastAPI request
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test_auth (AuthTuple): noop authentication tuple
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monkeypatch (pytest.MonkeyPatch): Fixture to modify environment variables
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"""
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# pylint: disable=import-outside-toplevel
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from models.config import ObservabilityConfiguration
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# Set OTEL environment variables
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monkeypatch.setenv("OTEL_SDK_DISABLED", "true")
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monkeypatch.setenv("OTEL_SERVICE_NAME", "test-service")
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monkeypatch.setenv("OTEL_EXPORTER_OTLP_ENDPOINT", "http://localhost:4317")
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# Reload configuration to pick up new env vars
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updated_observability = ObservabilityConfiguration.from_environment()
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# Verify OTEL vars are present in the environment
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# (Note: The config is loaded at startup, so these may not be in the response
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# unless we reload the entire config. This test verifies the mechanism works.)
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assert "OTEL_SDK_DISABLED" in os.environ
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assert "OTEL_SERVICE_NAME" in os.environ
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assert "OTEL_EXPORTER_OTLP_ENDPOINT" in os.environ
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# Verify that when we call from_environment(), it picks up the vars
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assert "OTEL_SDK_DISABLED" in updated_observability.otel
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assert updated_observability.otel["OTEL_SDK_DISABLED"] == "true"
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assert "OTEL_SERVICE_NAME" in updated_observability.otel
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assert updated_observability.otel["OTEL_SERVICE_NAME"] == "test-service"

‎tests/unit/models/config/test_dump_configuration.py‎

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"max_content_length": constants.SAVED_PROMPTS_DEFAULT_MAX_CONTENT_LENGTH,
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}
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_DEFAULT_OBSERVABILITY_DUMP: dict[str, dict[str, str]] = {
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"otel": {},
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}
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_MCP_SERVER_DUMP_DEFAULTS: dict[str, Any] = {
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"authorization_headers": {},
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"headers": [],
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"quota_subject": None,
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},
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"splunk": None,
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"observability": _DEFAULT_OBSERVABILITY_DUMP,
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"deployment_environment": "development",
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"reranker": {
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"enabled": False,
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"quota_subject": None,
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},
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"splunk": None,
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"observability": _DEFAULT_OBSERVABILITY_DUMP,
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"deployment_environment": "development",
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"reranker": {
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"enabled": False,
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"quota_subject": None,
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},
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"splunk": None,
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"observability": _DEFAULT_OBSERVABILITY_DUMP,
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"deployment_environment": "development",
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"reranker": {
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"enabled": False,
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"quota_subject": None,
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},
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"splunk": None,
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"observability": _DEFAULT_OBSERVABILITY_DUMP,
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"deployment_environment": "development",
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"reranker": {
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"enabled": False,
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"quota_subject": None,
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},
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"splunk": None,
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"observability": _DEFAULT_OBSERVABILITY_DUMP,
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"deployment_environment": "development",
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"reranker": {
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"enabled": False,
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"quota_subject": None,
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},
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"splunk": None,
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"observability": _DEFAULT_OBSERVABILITY_DUMP,
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"deployment_environment": "development",
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"reranker": {
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"enabled": False,
@@ -1998,6 +2008,7 @@ def test_dump_configuration_allow_degraded_mode(tmp_path: Path) -> None:
19982008
"quota_subject": None,
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},
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"splunk": None,
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"observability": _DEFAULT_OBSERVABILITY_DUMP,
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"deployment_environment": "development",
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"reranker": {
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"enabled": False,
@@ -2226,6 +2237,7 @@ def test_dump_configuration_max_retries_settings(tmp_path: Path) -> None:
22262237
"quota_subject": None,
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},
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"splunk": None,
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"observability": _DEFAULT_OBSERVABILITY_DUMP,
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"deployment_environment": "development",
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"reranker": {
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"enabled": False,
@@ -2454,6 +2466,7 @@ def test_dump_configuration_retry_count_settings(tmp_path: Path) -> None:
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"quota_subject": None,
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},
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"splunk": None,
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"observability": _DEFAULT_OBSERVABILITY_DUMP,
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"deployment_environment": "development",
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"reranker": {
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"enabled": False,
@@ -2689,6 +2702,7 @@ def test_dump_configuration_specific_compaction_values(tmp_path: Path) -> None:
26892702
"quota_subject": None,
26902703
},
26912704
"splunk": None,
2705+
"observability": _DEFAULT_OBSERVABILITY_DUMP,
26922706
"deployment_environment": "development",
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"reranker": {
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"enabled": False,

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