Hao Liang's Blog

Embrace the World with Cloud Native and Open-source

Implementation of zero-disruption rolling updates in Kubernetes

In a Kubernetes cluster, businesses usually use Deployment + LoadBalancer type Service to provide external services. The typical deployment architecture is shown in Figure 1. This architecture is very simple to deploy and operate, but service interruptions may occur when applications are updated or upgraded, causing online problems. Today we will analyze in detail why this architecture will cause service interruption when updating applications and how to avoid service interruption.