It uses MicroOS for rolling releases and auto-upgrades for less maintenance. I'm quite happy with it so far, and I like that it integrates with terraform.
[0] https://github.com/kube-hetzner/terraform-hcloud-kube-hetzne...
So, yes, it absolutely matters which OS you use, of course depending on your threat model and tolerance for "no, you don't get to ssh onto a Node and do whateverthehell you want"
However there is a gotcha. There are nearly infinite ways to setup your Pulumi codebase and there is no real prescribed structure outside of "create stacks". This can lead to a lot of time spent in architecting / implementing / testing different structures and abstractions which are not really a thing with Terraform. This can take time and can lead to refactors if you are not extremely intentional with your design.
The tool simply requires a small YAML config file and creates and configures everything that you need to get a fully functional cluster in a few minutes. It creates all the infrastructure resources (servers etc), it deploys kubernetes on all the nodes, and then installs some software that allows you to provision both load balancers and persistent volumes. It also installs a controller that makes upgrading to a new version easier.
What the tool does not install is other apps, because this would be too opinionated and depends from cluster to cluster.
- 3 masters with 3 cores and 4 GB of RAM each - load balancer for the masters (for the Kubernetes API) - 3 workers with faster AMD CPUs and 4 cores/8GB of RAM - around 200GB of storage in persistent volumes
I think it costs around 60-70 euros per month total! I can't remember the exact amount because I have many things with Hetzner and do tests creating and deleting stuff all the time so my bill is rather long lol.
Hetzner is very cheap, but I can voice for the performance and reliability as well. It's a very good provider and I highly recommend them. Now they even have 2 locations in the USA!