Description
Our current Grafana dashboards provide a great overview of test suite health, including a panel for "Top failed tests." However, identifying which of these failures are due to legitimate bugs versus intermittent "flaky tests" is a manual, time-consuming process. These flaky tests erode trust in our test suites and slow down development.
This project aims to build a simple but powerful Python script that automates flaky test detection. The script will directly query our Prometheus instance for the historical data of each failed test, using the jenkins_build_test_case_failure_age metric. It will then format this data and send it to the Gemini API with a carefully crafted prompt, asking it to identify which tests show a flaky pattern.
The final output will be a clean JSON list of the most probable flaky tests, which can then be used to populate a new "Top Flaky Tests" panel in our existing Grafana test suite dashboard.
Goals
By the end of Hack Week, we aim to have a single, working Python script that:
- Connects to Prometheus and executes a query to fetch detailed test failure history.
- Processes the raw data into a format suitable for the Gemini API.
- Successfully calls the Gemini API with the data and a clear prompt.
- Parses the AI's response to extract a simple list of flaky tests.
- Saves the list to a JSON file that can be displayed in Grafana.
- New panel in our Dashboard listing the Flaky tests
Resources
- Jenkins Prometheus Exporter: https://github.com/uyuni-project/jenkins-exporter/
- Data Source: Our internal Prometheus server.
- Key Metric:
jenkins_build_test_case_failure_age{jobname, buildid, suite, case, status, failedsince}. - Existing Query for Reference:
count by (suite) (max_over_time(jenkins_build_test_case_failure_age{status=~"FAILED|REGRESSION", jobname="$jobname"}[$__range])). - AI Model: The Google Gemini API.
- Example about how to interact with Gemini API: https://github.com/srbarrios/FailTale/
- Visualization: Our internal Grafana Dashboard.
- Internal IaC: https://gitlab.suse.de/galaxy/infrastructure/-/tree/master/srv/salt/monitoring
Outcome
- Jenkins Flaky Test Detector: https://github.com/srbarrios/jenkins-flaky-tests-detector and its container
- IaC on MLM Team: https://gitlab.suse.de/galaxy/infrastructure/-/tree/master/srv/salt/monitoring/jenkinsflakytestsdetector?reftype=heads, https://gitlab.suse.de/galaxy/infrastructure/-/blob/master/srv/salt/monitoring/grafana/dashboards/flaky-tests.json?ref_type=heads, and others.
- Grafana Dashboard: https://grafana.mgr.suse.de/d/flaky-tests/flaky-tests-detection @ @ text
Looking for hackers with the skills:
This project is part of:
Hack Week 25
Activity
Comments
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2 months ago by oscar-barrios | Reply
The code of the flaky detector is here: https://github.com/srbarrios/jenkins-flaky-tests-detector
I also published a Docker container to use it here: https://github.com/srbarrios/jenkins-flaky-tests-detector/pkgs/container/jenkins-flaky-tests-detector
The plan now is to write a Salt state in our MLM internal infra, so it runs this container, it expose the results in a web server running on the container, and then I parse it on Grafana.
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2 months ago by oscar-barrios | Reply
I created the new Grafana dashboard for Uyuni here: https://grafana.mgr.suse.de/d/flaky-tests/flaky-tests-detection?orgId=1&from=now-6h&to=now&timezone=browser&refresh=1m
Next step now is to build it in a way that I can get the flaky tests for all the Jenkins job test results that we monitoring in MLM.
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2 months ago by oscar-barrios | Reply
Now we can select any of the running test suites, and get a list of the most probable flaky tests :)
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2 months ago by oscar-barrios | Reply
I will consider this hackweek done for now, to move to my second hackweek project. The outcome it has been good, I must admit that I also vibe coded some parts using Gemini 3. Also, the script analyzing the prometheus series is not relying only on a LLM call, but it also do a first triage based on a simple algorithm, saving resources to ask AI only for ambiguos and complex test failures.
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Project Charter
Description
Project Achievements during Hackweek
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Basic implementation
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Example execution
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Description
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If you're still curious about the AI in the title, it was just a way to grab your attention. Thanks for your understanding.
Nah, let's be honest
AI helped a lot to vibe code a good part of the Ruby methods of the Test framework, moving them to Typescript, along with the migration from Capybara to Playwright. I've been using "Cline" as plugin for WebStorm IDE, using Gemini API behind it.
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- My Template for CucumberJS + Playwright in TypeScript
- Started Hackweek Project