139 lines
4.1 KiB
Python
139 lines
4.1 KiB
Python
#
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# Copyright (c) 2014 Wind River Systems, Inc.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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"""
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Cluster Services
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"""
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import sys
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from sysinv.cluster import cluster_xml as xml
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import logging
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from lxml import etree
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LOG = logging.getLogger(__name__)
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SERVICE_ACTIVITY_NOT_SET = ''
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SERVICE_ACTIVITY_UNKNOWN = 'unknown'
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SERVICE_ACTIVITY_ACTIVE = 'active'
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SERVICE_ACTIVITY_STANDBY = 'standby'
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SERVICE_STATE_NOT_SET = ''
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SERVICE_STATE_UNKNOWN = 'unknown'
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SERVICE_STATE_ENABLED = 'enabled'
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SERVICE_STATE_DISABLED = 'disabled'
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SERVICE_STATE_FAILED = 'failed'
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class ClusterServiceInstance(object):
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""" Cluster Service Instance information about the service running
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on a particular host in the cluster (state and activity)
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"""
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def __init__(self, name, host_name):
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self.name = name
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self.host_name = host_name
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self.activity = SERVICE_ACTIVITY_NOT_SET
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self.state = SERVICE_STATE_NOT_SET
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self.reason = []
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class ClusterService(object):
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""" Cluster Service contains information about the service running
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in the cluster (overall service state and service instances state)
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"""
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def __init__(self, service_name):
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self.name = service_name
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self.state = SERVICE_STATE_NOT_SET
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self.instances = []
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self.activity_follows = []
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self.resources = []
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self.migration_timeout = 0
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class ClusterServices(object):
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""" Cluster Services holds a listing of all services running
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in the cluster
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"""
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def __init__(self):
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self.list = []
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self.__cluster_data = ""
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self.__loaded = False
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def load(self, host_names):
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""" Load services
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"""
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if self.__loaded:
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if self.__cluster_data == xml.CLUSTER_DATA:
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return
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self.__cluster_data = ""
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self.__loaded = False
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self.list[:] = []
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try:
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xmlroot = etree.fromstring(xml.CLUSTER_DATA)
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if not etree.iselement(xmlroot):
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return
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if len(xmlroot) == 0:
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return
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xmlservices = xmlroot.find(".//services")
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if not etree.iselement(xmlservices):
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return
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for xmlservice in xmlservices.iterchildren():
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service = ClusterService(xmlservice.attrib["id"])
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# Hosts that the service runs on
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for host_name in host_names:
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instance = ClusterServiceInstance(xmlservice.attrib["id"],
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host_name)
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service.instances.append(instance)
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# Get migration attributes of a service
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xmlmigration = xmlroot.find(".//services/service[@id='%s']/"
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"migration"
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% xmlservice.attrib["id"])
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if not etree.iselement(xmlmigration):
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return
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service.migration_timeout = xmlmigration.attrib["timeout"]
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# Get resources that determine activity of service
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xmlactivity = xmlroot.find(".//services/service[@id='%s']/"
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"activity"
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% xmlservice.attrib["id"])
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if not etree.iselement(xmlactivity):
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return
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for xmlresource in xmlactivity.iterchildren():
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service.activity_follows.append(xmlresource.attrib["id"])
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# Get resources that make up service
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xmlresources = xmlroot.find(".//services/service[@id='%s']/"
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"resources"
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% xmlservice.attrib["id"])
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if not etree.iselement(xmlresources):
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return
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for xmlresource in xmlresources.iterchildren():
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service.resources.append(xmlresource.attrib["id"])
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self.list.append(service)
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self.__cluster_data = xml.CLUSTER_DATA
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self.__loaded = True
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except Exception:
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LOG.error("error:", sys.exc_info()[0])
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