lfarci / github-actions

Preparation resources for the GitHub Actions certification
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Diagnose a failed workflow run (i.e. using a workflow run history and its logs, determine why a workflow run may have failed) #35

Closed lfarci closed 4 months ago

lfarci commented 4 months ago

Diagnosing a failed workflow run involves checking the workflow run history and its logs to understand why the run may have failed. Here are the steps you can follow:

  1. Navigate to the Actions tab: In your GitHub repository, click on the "Actions" tab. This will show you a list of all workflow runs.

  2. Identify the failed run: Workflow runs that have failed will be marked with a red cross. Click on the name of the workflow run that you want to diagnose.

  3. Check the summary: On the workflow run page, you'll see a summary of the run. This includes the event that triggered the run, the commit that was checked out, and the jobs that were run. If a job failed, it will be marked with a red cross.

  4. Inspect the logs: Click on the name of the failed job. This will take you to a page with detailed logs for each step of the job. Steps that completed successfully will be marked with a green check, and steps that failed will be marked with a red cross. Click on the name of the failed step to expand the logs for that step.

  5. Read the error message: The logs for the failed step will usually include an error message that explains why the step failed. This could be a syntax error in your code, a missing dependency, a failed test, a network error, etc.

  6. Fix the issue: Once you've identified the cause of the failure, you can fix the issue. This might involve modifying your code, updating your dependencies, fixing your tests, etc. After you've made the necessary changes, you can commit and push your changes to trigger a new workflow run.

Remember, the logs are your best resource when diagnosing a failed workflow run. They provide detailed information about what happened at each step of the run, and they can help you identify the cause of the failure.