Multi-zone demo

Refresh this page while draining or isolating a worker zone. Web requests continue on healthy stateless pods, and MongoDB reports the current replica set primary.

Web podweb-587cfd948d-xz82t

Web node10.75.193.137

Databaseconnected

MongoDB primarymongodb-1.mongodb.multizone-demo.svc.cluster.local:27017

Multi-zone demo

This page is rendered by stateless web pods and backed by a three-member MongoDB replica set.

Failure behavior

If a worker zone goes down, Kubernetes removes unhealthy web endpoints. MongoDB elects a new primary when the current primary is lost and a majority remains.

Database-backed content

This card, and every card on this page, is stored in MongoDB. With one replica in each zone, the content survives the loss of any one of the three zones while a majority remains online.