[tmaier]

Sure!

First of all, GK3 would create new nodes when one of them gets killed.

Second, builidng “cloud-native” applications means to build stateless applications, e.g. using 12-factor. So it does not really matter if your application gets killed, restarted or horizontally scaled.

For databases, i always recommend to use a PaaS offering to have an easy and worry-free life

[donmcronald]

What if all 3 nodes get killed at the same time? Can you use the always free instance + 2 preemptible instances?

[DuskStar]

You can set GKE up to use multiple groups of nodes, yes. In this case you'd want to configure one group with a single non-preemptible micro node, and a second with two preemptible micro nodes. It's not something I'd really worry about for a hobby project though.