Runbooks · verification gates

Deployment documentation for node-js services

These docs emphasize verification: what to check after each deploy so nodejs regressions surface in metrics before customers report them.

Pre-deploy checklist

Forward-only migrations with expand/contract pattern for zero-downtime.

Environment variables compared against previous release manifest.

Error ratio and latency slope watched for fixed observation window.

Drain old node pools gracefully; connection handling described with code samples in portal library.

Artifact digests tagged per release; database downgrades require explicit runbook.

Structured JSON logs with correlation IDs across node services simplify support—include build SHA, region, and request ID fields.