Rolling Update

Definitions

1. A deployment strategy that gradually replaces old instances with new ones, maintaining availability throughout. Typically configured with maxSurge (extra instances during update) and maxUnavailable (instances that can be down). The default strategy in Kubernetes Deployments.

   In plain English: Updating your application one server at a time so the service never goes fully offline during deployment.

   Example: "Rolling updates mean zero downtime — Kubernetes replaces pods one by one, only killing old ones after new ones pass health checks."

Related Terms

• Canary Deployment
• Sidecar
• Helm Chart
• Init Container
• Blue/Green Deployment
• GitOps Pull Model
• Greedy Algorithm
• Divide and Conquer
• Replica Set
• Kustomize
• Config Map