feat 添加删除node

kubernetes/mantaince/delete_node.md

@@ -0,0 +1,14 @@
+
+标记节点为不可调度
+
+```bash
+kubectl cordon node2 hp800g3
+```
+
+排空节点
+
+kubectl drain node2 hp800g3
+
+删除节点
+
+kubectl delete node node2 hp800g3