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# Copyright (c) 2013 Red Hat, Inc.
#
# 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.
from ConfigParser import ConfigParser
from swift.common.ring import ring
from swift.common.utils import search_tree
from gluster.swift.common.Glusterfs import SWIFT_DIR
reseller_prefix = "AUTH_"
conf_files = search_tree(SWIFT_DIR, "proxy-server*", 'conf')
if conf_files:
conf_file = conf_files[0]
_conf = ConfigParser()
if conf_files and _conf.read(conf_file):
if _conf.defaults().get("reseller_prefix", None):
reseller_prefix = _conf.defaults().get("reseller_prefix")
else:
for key, value in _conf._sections.items():
if value.get("reseller_prefix", None):
reseller_prefix = value["reseller_prefix"]
break
if not reseller_prefix.endswith('_'):
reseller_prefix = reseller_prefix + '_'
class Ring(ring.Ring):
def _get_part_nodes(self, part):
seen_ids = set()
nodes = [dev for dev in self._devs \
if dev['device'] == self.acc_name \
and not (dev['id'] in seen_ids \
or seen_ids.add(dev['id']))]
if not nodes:
nodes = [self.false_node]
return nodes
def get_part_nodes(self, part):
"""
Get the nodes that are responsible for the partition. If one
node is responsible for more than one replica of the same
partition, it will only appear in the output once.
:param part: partition to get nodes for
:returns: list of node dicts
See :func:`get_nodes` for a description of the node dicts.
"""
return self._get_part_nodes(part)
def get_nodes(self, account, container=None, obj=None):
"""
Get the partition and nodes for an account/container/object.
If a node is responsible for more than one replica, it will
only appear in the output once.
:param account: account name
:param container: container name
:param obj: object name
:returns: a tuple of (partition, list of node dicts)
Each node dict will have at least the following keys:
====== ===============================================================
id unique integer identifier amongst devices
weight a float of the relative weight of this device as compared to
others; this indicates how many partitions the builder will try
to assign to this device
zone integer indicating which zone the device is in; a given
partition will not be assigned to multiple devices within the
same zone
ip the ip address of the device
port the tcp port of the device
device the device's name on disk (sdb1, for example)
meta general use 'extra' field; for example: the online date, the
hardware description
====== ===============================================================
"""
self.false_node = {'zone': 1, 'weight': 100.0, 'ip': '127.0.0.1', 'id': 0, \
'meta': '', 'device': 'volume_not_in_ring', \
'port': 6012}
if account.startswith(reseller_prefix):
self.acc_name = account.replace(reseller_prefix, '', 1)
else:
self.acc_name = account
part = 0
return part, self._get_part_nodes(part)
def get_more_nodes(self, part):
"""
Generator to get extra nodes for a partition for hinted handoff.
:param part: partition to get handoff nodes for
:returns: generator of node dicts
See :func:`get_nodes` for a description of the node dicts.
Should never be called in the swift UFO environment, so yield nothing
"""
yield self.false_node
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