feat: make kubeadm workflows auto-scale with terraform outputs

nixos/kubeadm/scripts/reset-cluster-nodes.sh

@@ -6,7 +6,7 @@ INVENTORY_FILE="${1:-$SCRIPT_DIR/inventory.env}"
 
 if [ ! -f "$INVENTORY_FILE" ]; then
   echo "Missing inventory file: $INVENTORY_FILE"
-  echo "Copy $SCRIPT_DIR/inventory.example.env to $SCRIPT_DIR/inventory.env and edit IPs."
+  echo "Copy $SCRIPT_DIR/inventory.example.env to $SCRIPT_DIR/inventory.env and edit node mappings."
   exit 1
 fi
 
@@ -16,22 +16,57 @@ source "$INVENTORY_FILE"
 SSH_USER="${SSH_USER:-micqdf}"
 SSH_OPTS="${SSH_OPTS:- -o BatchMode=yes -o StrictHostKeyChecking=accept-new }"
 
-required=(CP_1 CP_2 CP_3 WK_1 WK_2 WK_3)
-for key in "${required[@]}"; do
-  if [ -z "${!key:-}" ]; then
-    echo "Missing required inventory variable: $key"
+declare -A NODE_IPS=()
+
+add_pair() {
+  local pair="$1"
+  local name="${pair%%=*}"
+  local ip="${pair#*=}"
+
+  if [ -z "$name" ] || [ -z "$ip" ] || [ "$name" = "$ip" ]; then
+    echo "Invalid node pair '$pair' (expected name=ip)."
     exit 1
   fi
-done
+
+  NODE_IPS["$name"]="$ip"
+}
+
+if [ -n "${CONTROL_PLANES:-}" ]; then
+  for pair in $CONTROL_PLANES; do
+    add_pair "$pair"
+  done
+else
+  while IFS= read -r var_name; do
+    idx="${var_name#CP_}"
+    add_pair "cp-$idx=${!var_name}"
+  done < <(compgen -A variable | grep -E '^CP_[0-9]+$' | sort -V)
+fi
+
+if [ -n "${WORKERS:-}" ]; then
+  for pair in $WORKERS; do
+    add_pair "$pair"
+  done
+else
+  while IFS= read -r var_name; do
+    idx="${var_name#WK_}"
+    add_pair "wk-$idx=${!var_name}"
+  done < <(compgen -A variable | grep -E '^WK_[0-9]+$' | sort -V)
+fi
+
+if [ "${#NODE_IPS[@]}" -eq 0 ]; then
+  echo "No nodes found in inventory."
+  exit 1
+fi
 
 reset_node() {
-  local node_ip="$1"
-  echo "==> Resetting $node_ip"
+  local node_name="$1"
+  local node_ip="$2"
+  echo "==> Resetting $node_name ($node_ip)"
   ssh $SSH_OPTS "$SSH_USER@$node_ip" "sudo kubeadm reset -f && sudo systemctl stop kubelet && sudo rm -rf /etc/kubernetes /var/lib/etcd /var/lib/cni /etc/cni/net.d"
 }
 
-for key in CP_1 CP_2 CP_3 WK_1 WK_2 WK_3; do
-  reset_node "${!key}"
-done
+while IFS= read -r node_name; do
+  reset_node "$node_name" "${NODE_IPS[$node_name]}"
+done < <(printf '%s\n' "${!NODE_IPS[@]}" | sort -V)
 
 echo "Cluster components reset on all listed nodes."