Q: Your enterprise Backstage software catalog suddenly stops updating new services and entities. Logs reveal '403 API rate limit exceeded' from GitHub. How do you triage this immediately and redesign ingestion for scale?
Root cause isolation and architectural remediation when Spotify Backstage crashes or ceases catalog ingestion due to GitHub API rate-limiting across 2,000+ microservice repositories.
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🛠️ Production Runbook & Step-by-Step Resolution
Immediate Mitigation: Transition from Personal Access Token to GitHub App
Switch Backstage's GitHub authentication from a Personal Access Token (PAT) (5,000 req/hr) to a GitHub App installation. GitHub Apps provide 5,000 requests per hour per installation, scaling with organization repositories (up to 12,500 req/hr for enterprise organizations).
# app-config.yaml
integrations:
github:
- host: github.com
apps:
- appId: ${GITHUB_APP_ID}
clientId: ${GITHUB_CLIENT_ID}
clientSecret: ${GITHUB_CLIENT_SECRET}
webhookSecret: ${GITHUB_WEBHOOK_SECRET}
privateKey: ${GITHUB_PRIVATE_KEY}Shift from Full-Tree Polling to Event-Driven Webhook Ingestion
Disable recursive catalog scanning on 5-minute cron schedules. Configure GitHub Webhooks targeting Backstage's /api/catalog/github/webhook endpoint on push and repository events to trigger incremental entity refreshes only when catalog-info.yaml files change.
Tune Catalog Provider Batch Sizing & Schedule Frequency
In catalog.providers.github, adjust schedule.frequency from 5m to 120m for background safety scans, and set batch size to prevent burst concurrency.
catalog:
providers:
github:
organizationProvider:
organization: 'acme-enterprise'
schedule:
frequency: { minutes: 120 }
timeout: { minutes: 30 }
initialDelay: { seconds: 15 }- Switch authentication immediately from static PATs to GitHub Apps to gain dynamic enterprise rate limits.
- Deploy GitHub webhooks for push events so catalog refreshes trigger only on catalog-info.yaml commits.
- Increase background discovery poll interval from 5 minutes to 2 hours for reconciliation fallbacks.