Ok, great... I have a bunch of simple projects like that, one web instance running on a single host.
How do I safely upgrade it without downtime? Ensuring that the new version starts up properly and can receive traffic before sending it requests and stopping the old one?
With k8s: kubectl set image deployment/my-deployment mycontainer=myimage:1.9.1 (or just use kubectl apply -f)
That moves the goalposts a bit. We've gone from a simple service to a fleet of highly available services on multiple hosts with zero downtime requirements.
Still A single service on a single machine, how do I safely upgrade it?
A rolling deployment in k8s does work the same way on a single host with minikube as it does on a 1000 node cluster, but I'm still just asking about the single host case.
