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https://github.com/xcat2/confluent.git
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3c876566a6
The stock getaddrinfo can hang up all of confluent if misbehaving. Patch pyghmi and switch to using greendns in confluent internal lookups.
74 lines
3.0 KiB
Python
74 lines
3.0 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2015 Lenovo
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Utility library for interesting lookups of nodes.
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# Examples:
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# looking up a node by a hardwaremanagement.manager address
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# looking up a node by uuid (actually pretty straightforward
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# looking up a node by mac address
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# These are generally in the context of coming in from some unstructured
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# direction (alerts, PXE attempt) and for now will only look at the null
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# tenant (all baremetal tenants that are expected to receive alert/pxe
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# service should have a null tenant and a tenant entry that correlates)
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__author__ = 'jjohnson2'
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import confluent.config.configmanager as configmanager
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import itertools
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from eventlet.support import greendns
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manager_to_nodemap = {}
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def node_by_manager(manager):
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"""Lookup a node by manager
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Search for a node according to a given network address.
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Rather than do a simple equality, it uses getaddrinfo
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to allow name or ip and different forms of ip. For
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example, 'fe80::0001' will match 'fe80::01' and
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'127.000.000.001' will match '127.0.0.1'
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:param manager: The ip or resolvable name of the manager
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:returns: The node name (if any)
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"""
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manageraddresses = []
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for tmpaddr in greendns.getaddrinfo(manager, None):
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manageraddresses.append(tmpaddr[4][0])
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cfm = configmanager.ConfigManager(None)
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if manager in manager_to_nodemap:
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# We have a stored hint as to the most probably correct answer
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# put that node at the head of the list in hopes of reducing
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# iterations for a lookup in a large environment
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# However we don't trust the answer either, since
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# reconfiguration could have changed it and this mapping
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# is not hooked into getting updates
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check_nodes = itertools.chain(
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(manager_to_nodemap[manager],), cfm.list_nodes())
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else:
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check_nodes = cfm.list_nodes()
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hmattribs = cfm.get_node_attributes(check_nodes,
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('hardwaremanagement.manager',))
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for node in hmattribs:
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currhm = hmattribs[node]['hardwaremanagement.manager']['value']
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if currhm in manageraddresses:
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manager_to_nodemap[manager] = node
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return node
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for curraddr in greendns.getaddrinfo(currhm, None):
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curraddr = curraddr[4][0]
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if curraddr in manageraddresses:
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manager_to_nodemap[manager] = node
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return node |