适配CM组件

Signed-off-by: coolany <kyosang@163.com>

support cgroup

追加合入

script/base_utils/common/exceptions.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+# -*- coding:utf-8 -*-
+#############################################################################
+# Copyright (c) 2020 Huawei Technologies Co.,Ltd.
+#
+# openGauss is licensed under Mulan PSL v2.
+# You can use this software according to the terms
+# and conditions of the Mulan PSL v2.
+# You may obtain a copy of Mulan PSL v2 at:
+#
+#          http://license.coscl.org.cn/MulanPSL2
+#
+# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OF ANY KIND,
+# EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+# MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+# See the Mulan PSL v2 for more details.
+# ----------------------------------------------------------------------------
+# Description  :
+#############################################################################
+
+
+# ------------------cmd util----------------------
+class CommandNotFoundException(Exception):
+    """
+    """
+
+    def __init__(self, cmd, paths):
+        """
+        function: constructor
+        """
+        self.cmd = cmd
+        self.paths = paths
+
+    def __str__(self):
+        """
+        function: str
+        input  : NA
+        output : str
+        """
+        return "Could not locate command: '%s' in this set of paths: %s" \
+               % (self.cmd, repr(self.paths))