OpenStack Study: host_driver.py

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# Copyright 2013 OpenStack Foundation.

# All Rights Reserved.

#

# Licensed under the Apache License, Version 2.0 (the "License"); you may

# not use this file except in compliance with the License. You may obtain

# a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT

# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the

# License for the specific language governing permissions and limitations

# under the License.

import os

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class HostDriver(object):

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    def get_all_block_devices(self):

        """Get the list of all block devices seen in /dev/disk/by-path/."""

        files = []

        dir = "/dev/disk/by-path/"

        if os.path.isdir(dir):

            files = os.listdir(dir)

        devices = []

        for file in files:

            devices.append(dir + file)

        return devices