How do you do any deployments? It's common to have a load balancer, that routes traffic to nodes that are up. That part is mostly straightforward. It could be

How do you do any deployments? It's common to have a load balancer, that routes traffic to nodes that are up. That part is mostly straightforward. It could be the application's responsibility or the load balancer's. The tricky bit is maintenance on the load balancing parts.