prometheus / prometheus/client_python
prometheus_client.generate_latest()
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Description
Hi,
I use this method in combination with fastAPI in order to expose metrics over the API. The data come from a JSON file saved on Linux system (where the service runs).
When changing the values in the file in order to create metrics the metric value does not change, only when restarting the web server (Uvicorn).
Why are the changed values not recalculated?
For opening the file I use the standard command with open('filename.json', mode = 'r') as f:
Thank you in advance for the feedback!
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Research direction
Start with prometheus_client.generate_latest() and reproduce the reported behavior in the FastAPI/Uvicorn setup using values read from the JSON file on Linux. The issue does not name a source file or test; first determine whether changed file values should be reflected without restarting, then document the cause or add a focused fix and verification.
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Assessment
- Tech stack
- fastapi, prometheus, python
- Domain
- api, backend, observability
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100