Complete RCA investigation with documentation and workflow #2
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| name: Post ArgoCD RCA to Issue | ||
| # This workflow posts the Root Cause Analysis for the ArgoCD deployment failure | ||
| # Trigger it manually after investigation is complete | ||
| on: | ||
| workflow_dispatch: | ||
| inputs: | ||
| issue_number: | ||
| description: 'Issue number to post RCA comment to' | ||
| required: true | ||
| type: number | ||
| default: 12 | ||
| permissions: | ||
| issues: write | ||
| contents: read | ||
| jobs: | ||
| post-rca: | ||
| runs-on: ubuntu-latest | ||
| steps: | ||
| - name: Post Root Cause Analysis Comment | ||
| uses: actions/github-script@v7 | ||
| with: | ||
| script: | | ||
| const issueNumber = ${{ github.event.inputs.issue_number }}; | ||
| const rcaComment = `## 🔍 Root Cause Analysis | ||
| I've investigated the ArgoCD deployment failure for \`2-broken-apps\` and identified the root cause. | ||
| ### Issue Summary | ||
| **Problem:** Invalid Kubernetes manifest syntax in the source repository | ||
| **Location:** \`apps/broken-aks-store-all-in-one.yaml\` in the source repository | ||
| **Commit:** \`8cd04df204028ff78613a69fdb630625864037c6\` | ||
| **Error Type:** Malformed \`apiVersion\` field | ||
| ### Detailed Findings | ||
| The deployment is failing because of an **intentionally broken** Kubernetes manifest in the source repository (\`https://github.com/dcasati/argocd-notification-examples.git\`). | ||
| #### The Specific Error: | ||
| In the \`order-service\` Deployment manifest (line 178), the \`apiVersion\` field is malformed: | ||
| \`\`\`yaml | ||
| apiVersion: apps/v # ❌ INVALID - missing version number | ||
| kind: Deployment | ||
| metadata: | ||
| name: order-service | ||
| \`\`\` | ||
| **Expected:** | ||
| \`\`\`yaml | ||
| apiVersion: apps/v1 # ✅ CORRECT | ||
| kind: Deployment | ||
| metadata: | ||
| name: order-service | ||
| \`\`\` | ||
| This was introduced in commit \`8cd04df204028ff78613a69fdb630625864037c6\` with the commit message: **"break apiVersion formatting in deployment YAML"** | ||
| ### Why ArgoCD Failed | ||
| When ArgoCD attempts to sync this application: | ||
| 1. **Validation Stage:** ArgoCD's application controller validates the manifest | ||
| 2. **Error Detection:** The controller detects that \`apiVersion: apps/v\` is not a valid Kubernetes API version | ||
| 3. **Sync Failure:** ArgoCD marks the synchronization as invalid and fails after the configured retry limit (2 attempts) | ||
| 4. **Result:** Application status becomes \`Degraded\` and \`OutOfSync\` | ||
| The error message **"one or more synchronization tasks are not valid"** is ArgoCD's way of indicating that the manifests failed validation before they could even be applied to the cluster. | ||
| --- | ||
| ## 🛠️ Remediation Recommendations | ||
| ### Option 1: Fix the Source Repository (Recommended) | ||
| This application appears to be a **test/demo application** designed to trigger failures for testing ArgoCD notifications. If you want the application to deploy successfully: | ||
| **Steps:** | ||
| 1. Fork or update the source repository: \`https://github.com/dcasati/argocd-notification-examples.git\` | ||
| 2. Fix the malformed \`apiVersion\` in \`apps/broken-aks-store-all-in-one.yaml\`: | ||
| \`\`\`bash | ||
| # Navigate to the repository | ||
| cd /path/to/argocd-notification-examples | ||
| # Fix the apiVersion (line 178) | ||
| sed -i 's/apiVersion: apps\\\\/v$/apiVersion: apps\\\\/v1/' apps/broken-aks-store-all-in-one.yaml | ||
| # Commit and push | ||
| git commit -am "Fix apiVersion for order-service deployment" | ||
| git push | ||
| \`\`\` | ||
| 3. ArgoCD will automatically detect the change and retry the sync | ||
| ### Option 2: Update to Use a Valid Application Repository | ||
| If you need a working AKS Store demo application: | ||
| **Steps:** | ||
| 1. Update the ArgoCD Application manifest (\`Act-3/argocd-test-app.yaml\`) to point to a valid repository: | ||
| \`\`\`yaml | ||
| source: | ||
| # Use the official AKS store demo repository | ||
| repoURL: https://github.com/Azure-Samples/aks-store-demo.git | ||
| targetRevision: main | ||
| path: charts/aks-store-demo # Or appropriate path | ||
| \`\`\` | ||
| 2. Apply the updated manifest: | ||
| \`\`\`bash | ||
| kubectl apply -f Act-3/argocd-test-app.yaml | ||
| \`\`\` | ||
| ### Option 3: Accept This as Expected Behavior (If Testing Notifications) | ||
| If this application (\`2-broken-apps\`) is **intentionally broken** to test the ArgoCD notification system: | ||
| **Action:** No fix needed! The system is working as designed: | ||
| - ✅ ArgoCD detects the failure | ||
| - ✅ ArgoCD Notifications sends webhook to GitHub | ||
| - ✅ GitHub Actions workflow creates this issue automatically | ||
| - ✅ Issue contains detailed error information | ||
| **Recommendation:** Add a label like \`wontfix\` or \`expected-failure\` to this issue to document that this is intentional behavior for testing purposes. | ||
| --- | ||
| ## 📊 Additional Context | ||
| ### What Makes This Error Difficult to Debug | ||
| 1. **Generic Error Message:** "one or more synchronization tasks are not valid" doesn't immediately point to the specific field | ||
| 2. **Validation Failure:** The error occurs during manifest validation, not during actual deployment | ||
| 3. **No Kubernetes Events:** Since the manifest never reaches the cluster, there are no pod-level events to inspect | ||
| ### Validation Test Performed | ||
| I validated the YAML file and confirmed the error: | ||
| \`\`\` | ||
| Document 8: order-service Deployment | ||
| apiVersion: apps/v | ||
| ❌ ERROR: Invalid apiVersion! | ||
| Expected: apps/v1 | ||
| Found: apps/v | ||
| \`\`\` | ||
| ### Similar Issues to Watch For | ||
| This type of error ("one or more synchronization tasks are not valid") can also be caused by: | ||
| - Missing required fields in manifests | ||
| - Invalid Kubernetes resource API versions | ||
| - Malformed YAML syntax | ||
| - Resources not available in the target Kubernetes version | ||
| - RBAC permission issues (less common with this specific error) | ||
| --- | ||
| ## 🎯 Recommended Next Steps | ||
| 1. **Determine Intent:** Clarify whether this application is meant to fail (for testing) or should be fixed | ||
| 2. **Take Action:** Based on intent, choose one of the three options above | ||
| 3. **Monitor:** After any fix, watch the ArgoCD application status: \`argocd app get 2-broken-apps\` | ||
| 4. **Close Issue:** Once resolved (or marked as expected), close this issue with appropriate labels | ||
| --- | ||
| **Investigation Completed:** ${new Date().toISOString()} | ||
| **Analyst:** GitHub Copilot Agent`; | ||
| await github.rest.issues.createComment({ | ||
| owner: context.repo.owner, | ||
| repo: context.repo.repo, | ||
| issue_number: issueNumber, | ||
| body: rcaComment | ||
| }); | ||
| console.log(`✅ Posted RCA comment to issue #${issueNumber}`); | ||
