81 lines
2.2 KiB
Python
81 lines
2.2 KiB
Python
# Copyright (c) 2011 OpenStack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Handles all processes within the Guest VM, considering it as a Platform
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The :py:class:`GuestManager` class is a :py:class:`nova.manager.Manager` that
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handles RPC calls relating to Platform specific operations.
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**Related Flags**
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"""
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import os
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from trove.openstack.common import log
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from itertools import chain
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from trove.common import cfg
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LOG = log.getLogger(__name__)
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defaults = {
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'mysql': 'trove.guestagent.datastore.mysql.manager.Manager',
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'percona': 'trove.guestagent.datastore.mysql.manager.Manager',
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'redis': 'trove.guestagent.datastore.redis.manager.Manager',
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'cassandra': 'trove.guestagent.datastore.cassandra.manager.Manager',
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}
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CONF = cfg.CONF
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def get_custom_managers():
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return CONF.datastore_registry_ext
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def datastore_registry():
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return dict(chain(defaults.iteritems(),
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get_custom_managers().iteritems()))
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def to_gb(bytes):
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if bytes == 0:
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return 0.0
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size = bytes / 1024.0 ** 3
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return round(size, 2)
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def get_filesystem_volume_stats(fs_path):
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try:
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stats = os.statvfs(fs_path)
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except OSError:
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LOG.exception("Error getting volume stats.")
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raise RuntimeError("Filesystem not found (%s)" % fs_path)
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total = stats.f_blocks * stats.f_bsize
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free = stats.f_bfree * stats.f_bsize
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# return the size in GB
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used_gb = to_gb(total - free)
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total_gb = to_gb(total)
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output = {
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'block_size': stats.f_bsize,
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'total_blocks': stats.f_blocks,
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'free_blocks': stats.f_bfree,
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'total': total_gb,
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'free': free,
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'used': used_gb
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}
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return output
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