feat(infra): install k3s to additional managers

infrastructure/README.md

@@ -34,6 +34,7 @@ No modules.
 | [hcloud_placement_group.kubernetes](https://registry.terraform.io/providers/hetznercloud/hcloud/latest/docs/resources/placement_group) | resource |
 | [hcloud_server.manager](https://registry.terraform.io/providers/hetznercloud/hcloud/latest/docs/resources/server) | resource |
 | [hcloud_ssh_key.server](https://registry.terraform.io/providers/hetznercloud/hcloud/latest/docs/resources/ssh_key) | resource |
+| [ssh_resource.additional_manager](https://registry.terraform.io/providers/loafoe/ssh/2.7.0/docs/resources/resource) | resource |
 | [ssh_resource.initial_manager](https://registry.terraform.io/providers/loafoe/ssh/2.7.0/docs/resources/resource) | resource |
 | [ssh_resource.server_ready](https://registry.terraform.io/providers/loafoe/ssh/2.7.0/docs/resources/resource) | resource |
 | [ssh_sensitive_resource.join_token](https://registry.terraform.io/providers/loafoe/ssh/2.7.0/docs/resources/sensitive_resource) | resource |

infrastructure/k3s.tf

@@ -115,3 +115,47 @@ resource "ssh_sensitive_resource" "kubeconfig" {
     ssh_resource.initial_manager
   ]
 }
+
+resource "ssh_resource" "additional_manager" {
+  count = var.k3s_manager_count - 1
+
+  host        = hcloud_server.manager[count.index + 1].ipv4_address
+  user        = local.machine_user
+  private_key = file(var.ssh_key)
+
+  commands = [
+    format(
+      "curl -sfL %s | INSTALL_K3S_EXEC=\"%s\" %s sh -",
+      var.k3s_download_url,
+      // Install configuration
+      join(" ", [
+        "server",
+        "--write-kubeconfig-mode=0644",
+        "--disable servicelb",
+        "--disable traefik",
+        format("--tls-san=%s", local.k3s_tls_san),
+        format("--node-name=%s", hcloud_server.manager[count.index + 1].name),
+        format("--node-external-ip=%s", hcloud_server.manager[count.index + 1].ipv4_address),
+        format("--node-ip=%s", tolist(hcloud_server.manager[count.index + 1].network)[0].ip),
+        format("--advertise-address=%s", tolist(hcloud_server.manager[count.index + 1].network)[0].ip),
+      ]),
+      // Other k3s configuration
+      join(" ", [
+        format("K3S_URL=%s", local.k3s_initial_manager_private_ip),
+        format("K3S_TOKEN=%s", local.k3s_join_token)
+      ])
+    )
+  ]
+
+  timeout     = "5m"
+  retry_delay = "5s"
+
+
+  triggers = {
+    always_run = timestamp()
+  }
+
+  depends_on = [
+    ssh_resource.initial_manager
+  ]
+}