Add support for IPv6 addresses about k3sup HOT 10 OPEN

I would be also interested in this. Most of VPS servers are quite cheaper when paying for IPv6 only

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Hi, have you tried --host instead of --ip?

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With --host I get the same error.

I also tried --host with the <vmname>.mshome.net, but since this is from inside WSL2, the DNS doesn't resolve.

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I have no idea on the matter because I don't know much about the ssh library in go, but in a quick search I found this: kubernetes/minikube#625 and kubernetes/minikube#6110 they used to solve the same error in minikube

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Thanks for your interest @Charlio99

How cheap is your IPv6-only VPS?

DO and Scaleway have VMs for 3-5 EUR/USD/mo.

Is it cheaper than that? And is that the only driver here?

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Hello @alexellis,

The price difference it’s 1,7EUR/mo in the 1vCPU 2GB RAM config, the thing is that if I spin up 3 clusters with 3 workers 1 cp each, it’s 20EUR/month I could be having almost 2 clusters more for that.

Given that the main purpose of k3sup is to quickly spin up a k3s cluster, I think this is the ideal scenario.

I would be willing to help implement it but I never used go before.

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I'm not in the position to test right now, since I fully changed my k8s server setup to harvester/rancher, rather than Windows+hyperv/multipass/k3sup, but I didn't test back then if ipv6 worked if you put square brackets around the address, similar to how you go to ipv6 addresses in the browser.

@Charlio99 , could you test that?

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I tried that also, I did some more debugging today and it seems that github.com is a non IPv6 domain, so when get.k3s.io tried to fetch the last version, it can't...

$ nslookup github.com
Server:		2606:4700:4700::1111
Address:	2606:4700:4700::1111#53

Non-authoritative answer:
Name:	github.com
Address: 140.82.121.4

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I found a way around, I've created this PR, it's a simple change to the docs explaining how to do it, feel free to edit anything you want.

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Great work!

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