Module 3 — Operations & Debugging

Module 3 — Operations & Debugging

30 min · Hands-on

What you actually do when CI is red at 2 AM.

Topics

Topic	Guide
Monitoring runs, logs & re-running jobs	monitoring-and-reruns.md
Artifacts: upload, download, share	artifacts.md
Debugging: step debug, annotations, summaries	debugging-guide.md

Hands-on

• Exercise: exercises/exercise.md
• Solution: solutions/03-debugging/

Quick wins to remember

# Re-run only the failed jobs of a workflow run
gh run rerun <run-id> --failed

# Watch a run in your terminal
gh run watch <run-id>

# Pull the failed log only
gh run view <run-id> --log-failed

# Add rich Markdown output to the run summary
- run: |
    echo "### 🧪 Test Results" >> $GITHUB_STEP_SUMMARY
    echo "| Suite | Passed |" >> $GITHUB_STEP_SUMMARY
    echo "|-------|--------|" >> $GITHUB_STEP_SUMMARY
    echo "| unit  | ✅ 142 |" >> $GITHUB_STEP_SUMMARY