How would I setup a cluster including a bare metal server?

[if-mar]

Hi, I'm currently taking a closer look at hetzner-k3s and have already created and used a few test clusters. For productive use, however, I would like to add a bare-metal worker node with more resources than the cloud instances offer to the cluster.
I can reach the bare-metal server from the cloud network via a vSwitch.
How would I have to adapt the cluster-config yaml file to realise this? Thanks for any support!

[vitobotta]

Hey, currently, this feature isn’t supported out of the box, but I’m thinking about adding it in the future since it could be really useful.

For now, you can try to manually connect your dedicated server to the cluster. To do this, you need to have updated to hetzner-k3s version 2.0.9 (which is the latest one).

Here’s how you can do it:

1. First, clone the hetzner-k3s repository to your local machine and open it as a development container in VS Code. This is easier because it already has Crystal and other dependencies, and you’ll need Docker for this to work (see https://github.com/vitobotta/hetzner-k3s/blob/main/docs/Contributing_and_support.md#developing-with-vscode).
2. Then, open the src/kubernetes/installer.cr file and add the line puts install_script right after line 147.
3. After that, run the create command using hetzner-k3s like this:

crystal run src/hetzner-k3s.cr -- create --config <path to your cluster's yaml file>

The create command will not change anything in the cluster unless you have made changes to the configuration file. However, because of the line you added in step 2, it will print out the full command that hetzner-k3s uses to join a node to the cluster.

Lastly, run the join command on your dedicated server. If the dedicated server is in the same network as the cluster, it should work. Keep in mind that I haven’t tried this myself yet. Good luck, and let me know how it goes!

[if-mar]

Thank you for your instructions! I will try and keep you updated.