improve: make check_nodes.sh more readable with colors and summary

cluster/check_nodes.sh

@@ -1,7 +1,76 @@
 #!/usr/bin/env bash
-# 用途：檢查叢集節點狀態
+# 用途：檢查 K3s 叢集節點狀態
 
 set -euo pipefail
 
-kubectl get nodes -o wide
+# 顏色定義
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
 
+echo "=========================================="
+echo "        K3s 叢集節點狀態"
+echo "=========================================="
+echo ""
+
+# 取得節點資訊
+NODES=$(kubectl get nodes --no-headers)
+
+# 統計
+NODE_TOTAL=$(echo "$NODES" | wc -l)
+NODE_READY=$(echo "$NODES" | grep -c " Ready " || true)
+NODE_NOT_READY=$(echo "$NODES" | grep -v " Ready " | wc -l)
+
+echo "📊 叢集概況"
+echo "------------------------------------------"
+echo "總節點數: $NODE_TOTAL"
+echo -e "  ${GREEN}Ready:     $NODE_READY${NC}"
+if [ $NODE_NOT_READY -gt 0 ]; then
+  echo -e "  ${RED}NotReady:  $NODE_NOT_READY${NC}"
+fi
+echo ""
+
+# 顯示每個節點的詳細資訊
+echo "🖥️  節點詳細資訊"
+echo "------------------------------------------"
+
+while read -r name status roles age version internal_ip os kernel runtime; do
+  # 顏色判斷
+  if [[ "$status" == "Ready"* ]]; then
+    STATUS_COLOR="$GREEN"
+    ICON="✓"
+  else
+    STATUS_COLOR="$RED"
+    ICON="✗"
+  fi
+
+  # 角色簡化
+  if [[ "$roles" == *"control-plane"* ]]; then
+    ROLE="${BLUE}[master]${NC}"
+  elif [[ "$roles" == "<none>" ]]; then
+    ROLE="[worker]"
+  else
+    ROLE="$roles"
+  fi
+
+  # 輸出
+  echo -e "${STATUS_COLOR}$ICON $name${NC} $ROLE"
+  echo "   狀態: $status"
+  echo "   IP:   $internal_ip"
+  echo "   OS:   $os $kernel"
+  echo ""
+done <<< "$NODES"
+
+# Pod 分佈
+echo "📦 Pod 分佈"
+echo "------------------------------------------"
+kubectl get pods -A -o jsonpath='{range .items[*]}{.metadata.namespace}{"\t"}{.metadata.name}{"\t"}{.spec.nodeName}{"\n"}' | awk '{print $1, $2, "→", $3}' | column -t | head -20
+
+POD_TOTAL=$(kubectl get pods -A --no-headers | wc -l)
+echo "..."
+echo "總 Pod 數: $POD_TOTAL"
+echo ""
+
+echo "=========================================="