Agent skill

NestJS Deployment

Docker builds, Memory tuning, and Graceful shutdown.

View SKILL.md on GitHub Repository
Stars 163
Forks 31

Install this agent skill to your Project

npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/deployment-hoangnguyen0403-agent-skills-standar-2

Metadata

Additional technical details for this skill

labels
nestjs deployment docker k8s
triggers 
{
    "files": [
        "Dockerfile",
        "k8s/**",
        "helm/**"
    ],
    "keywords": [
        "Dockerfile",
        "max-old-space-size",
        "shutdown hooks"
    ]
}

SKILL.md

Deployment & Ops Standards

Priority: P1 (OPERATIONAL)

Docker optimization and production deployment standards for NestJS applications.

Docker Optimization

  • Multi-Stage Builds: Mandatory.
    1. Build Stage: Install devDependencies, build NestJS (nest build).
    2. Run Stage: Copy only dist and node_modules (pruned), use node:alpine.
  • Security: Do not run as root.
    • Dockerfile: USER node.

Runtime Tuning (Node.js)

  • Memory Config: Container memory != Node memory.
    • Rule: Explicitly set Max Old Space.
    • Command: node --max-old-space-size=XXX dist/main
    • Calculation: Set to ~75-80% of Kubernetes Limit. (Limit: 1GB -> OldSpace: 800MB).
  • Graceful Shutdown:
    • Signal: Listen to SIGTERM.
    • NestJS: app.enableShutdownHooks() is mandatory.
    • Sleep: Add a "Pre-Stop" sleep in K8s (5-10s) to allow Load Balancer to drain connections before Node process stops accepting traffic.

Init Patterns

  • Database Migrations:
    • Anti-Pattern: Running migration in main.ts on startup.
    • Pro Pattern: Use an Init Container in Kubernetes that runs npm run typeorm:migration:run before the app container starts.

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