9a2f8618de
Provides a mechanism to allow the central agent to be horizontally scaled out, such that each agent polls a disjoint subset of resources. This is achieved through the use of `tooz` library for distributed coordination. If a service wants to use work-load partitioning, it must first create a PartitionCoordinator object and call its `heartbeat` method periodically. To distribute a set of resources over multiple agents, use the `extract_my_subset` method of the PartitionCoordinator that filters an iterable, returning only the resources assigned to us. The `PartitionCoordinator` uses `tooz` to figure out which agents are in the same group and figures out which resources belong to the current agent. DocImpact Change-Id: I7adef87b03129f4f8b38109bf547c7403cc6adad Implements: blueprint central-agent-partitioning
60 lines
2.3 KiB
Python
60 lines
2.3 KiB
Python
#
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# Copyright 2012-2013 eNovance <licensing@enovance.com>
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#
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# Author: Julien Danjou <julien@danjou.info>
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from keystoneclient.v2_0 import client as ksclient
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from oslo.config import cfg
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from ceilometer import agent
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from ceilometer.openstack.common import log
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OPTS = [
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cfg.StrOpt('partitioning_group_prefix',
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default=None,
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help='Work-load partitioning group prefix. Use only if you '
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'want to run multiple central agents with different '
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'config files. For each sub-group of the central agent '
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'pool with the same partitioning_group_prefix a disjoint '
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'subset of pollsters should be loaded.'),
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]
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cfg.CONF.register_opts(OPTS, group='central')
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cfg.CONF.import_group('service_credentials', 'ceilometer.service')
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LOG = log.getLogger(__name__)
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class AgentManager(agent.AgentManager):
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def __init__(self):
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super(AgentManager, self).__init__(
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'central', group_prefix=cfg.CONF.central.partitioning_group_prefix)
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def interval_task(self, task):
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try:
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self.keystone = ksclient.Client(
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username=cfg.CONF.service_credentials.os_username,
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password=cfg.CONF.service_credentials.os_password,
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tenant_id=cfg.CONF.service_credentials.os_tenant_id,
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tenant_name=cfg.CONF.service_credentials.os_tenant_name,
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cacert=cfg.CONF.service_credentials.os_cacert,
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auth_url=cfg.CONF.service_credentials.os_auth_url,
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region_name=cfg.CONF.service_credentials.os_region_name,
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insecure=cfg.CONF.service_credentials.insecure)
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except Exception as e:
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self.keystone = e
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super(AgentManager, self).interval_task(task)
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