Demo of CockroachDB's in-place rolling upgrades

In this demo I'm going to walk you through how an in-place rolling-upgrade works with CockroachDB and that it can be performed without any type of downtime. I've chosen to walk you through the "manual" approach, to be able to explain whats happening under the covers. Under normal circumstances you most likely going to automate all of that using tools like Terraform and/or Ansible, or "offload" the work and let the CockroachDB Kubernetes Operator do the heavy lifting for you, or don't even worry about it, if you chose to use CockroachDB via its managed Service, CockroachDB Cloud.