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75 lines
3.0 KiB
Python
75 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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currhm = currhm.split('/', 1)[0]
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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 |