82 lines
2.4 KiB
Python
82 lines
2.4 KiB
Python
# Copyright(c) 2019 Canonical Ltd
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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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from xml.etree import ElementTree
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from oslo_log import log as oslo_logging
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LOG = oslo_logging.getLogger(__name__)
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class ParseCrmMonXml(object):
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"""ParseCrmMonXml class
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This class parses the crmmon xml.
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"""
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def __init__(self):
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self.crmmon_tag = None
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def set_crmmon_xml(self, crmmon_xml):
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"""Set xml.etree.ElementTree.Element object.
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This method receives string of crmmon xml, and convert it
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to xml.etree.ElementTree.Element object.
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:params crmmon_xml: String of crmmon xml
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"""
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# Convert xml.etree.ElementTree.Element object.
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self.crmmon_tag = ElementTree.fromstring(crmmon_xml)
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def _get_nodes(self):
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# status tag exists in the crmmon tag.
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if self.crmmon_tag is None:
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return None
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child_list = self.crmmon_tag.getchildren()
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for child in child_list:
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if child.tag == 'nodes':
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return child
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return None
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def _get_node_states(self, nodes_tag):
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node_state_tag_list = []
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# node_state tag exists in the status tag.
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child_list = nodes_tag.getchildren()
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for child in child_list:
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if child.tag == 'node':
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node_state_tag_list.append(child)
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return node_state_tag_list
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def get_node_state_tag_list(self):
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"""Get node_state tag list.
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This method gets node_state tag list from crmmon xml.
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:returns: node_state tag list
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"""
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# Get status tag.
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nodes_tag = self._get_nodes()
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if nodes_tag is None:
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LOG.error("crm_mon xml doesn't have nodes tag.")
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return []
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# Get node_state tag list.
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node_state_tag_list = self._get_node_states(nodes_tag)
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if len(node_state_tag_list) == 0:
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LOG.error("crm_mon xml doesn't have online tag.")
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return node_state_tag_list
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