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-rwxr-xr-xextensions/swift-storage-devices-validate.py60
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diff --git a/extensions/swift-storage-devices-validate.py b/extensions/swift-storage-devices-validate.py
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+++ b/extensions/swift-storage-devices-validate.py
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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Copyright © 2015 Codethink Limited
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+# This is used by the openstack-swift.configure extension
+# to validate any provided storage device specifiers
+# under SWIFT_STORAGE_DEVICES
+#
+
+
+'''
+ This is used by the swift-storage.configure extension
+ to validate any storage device specifiers specified
+ in the SWIFT_STORAGE_DEVICES environment variable
+'''
+
+from __future__ import print_function
+
+import yaml
+import sys
+
+EXAMPLE_DEVSPEC = '{device: sdb1, ip: 127.0.0.1, weight: 100}'
+REQUIRED_KEYS = ['ip', 'device', 'weight']
+
+def err(msg):
+ print(msg, file=sys.stderr)
+ sys.exit(1)
+
+if len(sys.argv) != 2:
+ err('usage: %s STRING_TO_BE_VALIDATED' % sys.argv[0])
+
+swift_storage_devices = yaml.load(sys.argv[1])
+
+if not isinstance(swift_storage_devices, list):
+ err('Expected list of device specifiers\n'
+ 'Example: [%s]' % EXAMPLE_DEVSPEC)
+
+for d in swift_storage_devices:
+ if not isinstance(d, dict):
+ err("Invalid device specifier: `%s'\n"
+ 'Device specifier must be a dictionary\n'
+ 'Example: %s' % (d, EXAMPLE_DEVSPEC))
+
+ if set(d.keys()) != set(REQUIRED_KEYS):
+ err("Invalid device specifier: `%s'\n"
+ 'Specifier should contain: %s\n'
+ 'Example: %s' % (d, str(REQUIRED_KEYS)[1:-1], EXAMPLE_DEVSPEC))