fix(iac): K3s - working on kubeconfig extraction using remote mode

Author: alhendrickson

deployment/terraform/modules/openstack-kubernetes-infra/kubeconfig-extraction.tf

@@ -17,12 +17,23 @@ EOT
   }
 }
 
-data "local_file" "kube_config_raw_file" {
-  filename = local.kubeconfig_file
-  depends_on = [ null_resource.copy_kubeconfig ]
-}
+# data "local_file" "kube_config_raw_file" {
+#   filename = local.kubeconfig_file
+#   depends_on = [ null_resource.copy_kubeconfig ]
+# }
+
+# output "kube_config_raw" {
+#   value = data.local_file.kube_config_raw_file
+#   description = "Kubeconfig for this cluster"
+# }
+
+# data "external" "extract_kubeconfig_file" {
+#   program = ["bash", "${path.module}/kubeconfig_extraction.sh"]
 
-output "kube_config_raw" {
-  value = data.local_file.kube_config_raw_file
-  description = "Kubeconfig for this clustr"
-}
+#   query = {
+#         PATH_ROOT=path.root
+#         SERVER_IP=openstack_compute_instance_v2.kubernetes_server.access_ip_v4
+#         SSH_KEY=local.ssh_keys.private_key_file
+#         # KUBECONFIG_FILE=local.kubeconfig_file
+#   }
+# }

deployment/terraform/modules/openstack-kubernetes-infra/kubeconfig_extraction.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# ==============================
+# Variables (from Terraform)
+# ==============================
+PATH_ROOT=${path.root}
+SERVER_IP=${openstack_compute_instance_v2.kubernetes_server.access_ip_v4}
+SSH_KEY=${local.ssh_keys.private_key_file}
+KUBECONFIG_FILE=${local.kubeconfig_file}
+
+# ==============================
+# Script Logic
+# ==============================
+
+# Create .build directory if it doesn't exist
+mkdir -p "${PATH_ROOT}/.build/"
+
+# Add server's SSH key to a custom known_hosts file
+ssh-keyscan -H "${SERVER_IP}" >> "${PATH_ROOT}/.build/.known_hosts_cogstack"
+
+# Securely copy the K3s kubeconfig file from the server
+scp \
+  -o UserKnownHostsFile="${PATH_ROOT}/.build/.known_hosts_cogstack" \
+  -o StrictHostKeyChecking=yes \
+  -i "${SSH_KEY}" \
+  "ubuntu@${SERVER_IP}:/etc/rancher/k3s/k3s.yaml" \
+  "${KUBECONFIG_FILE}"
+
+# Replace localhost with the actual server IP in the kubeconfig
+sed -i "s/127\.0\.0\.1/${SERVER_IP}/" "${KUBECONFIG_FILE}"
+
+echo "Kubeconfig successfully fetched and updated at: ${KUBECONFIG_FILE}"