show me how to deploy a k3s cluster in hetzner cloud

To deploy a K3s cluster in Hetzner Cloud using Pulumi, you can use the hcloud provider. Below is a TypeScript program that sets up a K3s cluster on Hetzner Cloud.

First, make sure you have the Pulumi CLI installed and configured, and the @pulumi/hcloud package installed.

import * as pulumi from "@pulumi/pulumi";
import * as hcloud from "@pulumi/hcloud";

// Create a new SSH key
const sshKey = new hcloud.SshKey("my-ssh-key", {
    publicKey: "<your-public-ssh-key-here>",
});

// Create a new Hetzner Cloud network
const network = new hcloud.Network("my-network", {
    ipRange: "10.0.0.0/16",
});

// Create a subnet within the network
const subnet = new hcloud.Subnet("my-subnet", {
    networkId: network.id,
    type: "cloud",
    networkZone: "eu-central",
    ipRange: "10.0.1.0/24",
});

// Create a firewall to allow traffic to the K3s cluster
const firewall = new hcloud.Firewall("my-firewall", {
    rules: [
        {
            direction: "in",
            protocol: "tcp",
            port: "6443",
            sourceIps: ["0.0.0.0/0"],
        },
        {
            direction: "in",
            protocol: "tcp",
            port: "80",
            sourceIps: ["0.0.0.0/0"],
        },
        {
            direction: "in",
            protocol: "tcp",
            port: "443",
            sourceIps: ["0.0.0.0/0"],
        },
    ],
});

// Create a server for the K3s master node
const master = new hcloud.Server("k3s-master", {
    serverType: "cx21",
    image: "ubuntu-20.04",
    sshKeys: [sshKey.name],
    networks: [network.id],
    firewallIds: [firewall.id],
    userData: `#!/bin/bash
curl -sfL https://get.k3s.io | sh -`,
});

// Create two servers for the K3s worker nodes
const worker1 = new hcloud.Server("k3s-worker-1", {
    serverType: "cx21",
    image: "ubuntu-20.04",
    sshKeys: [sshKey.name],
    networks: [network.id],
    firewallIds: [firewall.id],
    userData: `#!/bin/bash
curl -sfL https://get.k3s.io | K3S_URL=https://${master.ipv4Address}:6443 K3S_TOKEN=<your-k3s-token> sh -`,
});

const worker2 = new hcloud.Server("k3s-worker-2", {
    serverType: "cx21",
    image: "ubuntu-20.04",
    sshKeys: [sshKey.name],
    networks: [network.id],
    firewallIds: [firewall.id],
    userData: `#!/bin/bash
curl -sfL https://get.k3s.io | K3S_URL=https://${master.ipv4Address}:6443 K3S_TOKEN=<your-k3s-token> sh -`,
});

// Export the master node's IP address
export const masterIp = master.ipv4Address;

This program creates a Hetzner Cloud network, a subnet, a firewall, and three servers (one master and two workers) for the K3s cluster. The master node installs K3s, and the worker nodes join the cluster using the master's IP address and a shared token. Replace <your-public-ssh-key-here> and <your-k3s-token> with your actual SSH public key and K3s token, respectively.