Alibaba Cloud Native

Sep 30, 2020 · Cloud Native

Kubernetes Cluster Upgrade Guide: Pre‑Checks, Methods & Step‑by‑Step

This article explains why Kubernetes clusters need regular upgrades, outlines the challenges, details essential pre‑upgrade health checks for core components, nodes and cloud resources, compares in‑place and replacement upgrade strategies with their pros and cons, and presents a three‑stage upgrade process covering master, worker and core system components.