Senior LevelNode JS
When should you use native Node.js Cluster mode versus Kubernetes Horizontal Pod Autoscaling (HPA)?
❓ Interview Prompt: Compare Node.js Cluster mode (process per CPU core in 1 container) vs Kubernetes HPA (1 process per container, multi-pod scaling).
Kubernetes Best Practice:
In Kubernetes, run 1 Node.js process per container (do NOT use Cluster mode inside pods!):
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Allows Kubernetes HPA (Horizontal Pod Autoscaler) to manage CPU scaling, memory limits, and pod evictions cleanly.
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Reserve Node.js 'cluster' mode for deployments on bare-metal VMs or large EC2 instances.
Code Implementation Example
javascript
console.log('Kubernetes best practice: 1 Node.js process per pod container');💡Kubernetes 1-process-per-container deployment architecture.
🎯 Interview Key Takeaway
Run 1 Node.js process per container in Kubernetes to allow HPA and cgroup resource limits to function accurately.
#Kubernetes#HPA#Cluster#Architecture#Senior
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