154 lines
4.8 KiB
Python
154 lines
4.8 KiB
Python
# Copyright 2018 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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# The dragent handlers class
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# bare functions are provided to the reactive handlers to perform the functions
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# needed on the class.
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from __future__ import absolute_import
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import collections
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import charmhelpers.contrib.network.ip as ch_ip
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import charms_openstack.charm
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import charms_openstack.adapters as os_adapters
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PACKAGES = ['neutron-bgp-dragent', 'neutron-dynamic-routing-common',
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'python-neutron-dynamic-routing']
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NEUTRON_DIR = '/etc/neutron/'
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NEUTRON_CONF = NEUTRON_DIR + "neutron.conf"
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DRAGENT_CONF = NEUTRON_DIR + "bgp_dragent.ini"
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OPENSTACK_RELEASE_KEY = ('neutron-dynamic-routing-charm.'
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'openstack-release-version')
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# select the default release function
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charms_openstack.charm.use_defaults('charm.default-select-release')
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def render_configs(interfaces_list):
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"""Using a list of interfaces, render the configs and, if they have
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changes, restart the services on the unit.
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"""
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# Starting out with just amqp
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try:
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[i for i in interfaces_list]
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except TypeError:
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interfaces_list = [interfaces_list]
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DRAgentCharm.singleton.render_with_interfaces(interfaces_list)
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def assess_status():
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"""Just call the DRAgentCharm.singleton.assess_status() command to update
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status on the unit.
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"""
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DRAgentCharm.singleton.assess_status()
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@os_adapters.config_property
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def provider_ip(cls):
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return ch_ip.get_relation_ip('provider')
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@os_adapters.config_property
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def speaker_ip(cls):
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return ch_ip.get_relation_ip('speaker')
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class TransportURLAdapter(os_adapters.RabbitMQRelationAdapter):
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"""Add Transport URL to RabbitMQRelationAdapter
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TODO: Move to charms.openstack.adapters
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"""
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@property
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def transport_url(self):
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hosts = self.hosts or [self.host]
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if hosts:
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transport_url_hosts = ','.join([
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"{}:{}@{}:{}".format(self.username,
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self.password,
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host_,
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self.port)
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for host_ in hosts])
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return "rabbit://{}/{}".format(transport_url_hosts, self.vhost)
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@property
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def port(self):
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return self.ssl_port or 5672
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class DRAgentCharm(charms_openstack.charm.OpenStackCharm):
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"""DRAgentCharm provides the specialisation of the OpenStackCharm
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functionality to manage a dragent unit.
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"""
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release = 'pike'
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name = 'neutron-dynamic-routing'
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packages = PACKAGES
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default_service = 'neutron-bgp-dragent'
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services = ['neutron-bgp-dragent']
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# Note that the hsm interface is optional - defined in config.yaml
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required_relations = ['amqp']
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adapters_class = os_adapters.OpenStackRelationAdapters
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adapters_class.relation_adapters = {
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'amqp': TransportURLAdapter,
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}
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restart_map = {
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NEUTRON_CONF: services,
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DRAGENT_CONF: services,
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}
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# Package for release version detection
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release_pkg = 'neutron-dynamic-routing-common'
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# Package codename map for barbican-common
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package_codenames = {
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'neutron-dynamic-routing-common': collections.OrderedDict([
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('11', 'pike'),
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('12', 'queens'),
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('13', 'rocky'),
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]),
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}
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def install(self):
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self.configure_source()
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super().install()
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def get_amqp_credentials(self):
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"""Provide the default amqp username and vhost as a tuple.
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:returns (username, host): two strings to send to the amqp provider.
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"""
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return (self.config['rabbit-user'], self.config['rabbit-vhost'])
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def states_to_check(self, required_relations=None):
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"""Override the default states_to_check() for the assess_status
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functionality so that, if we have to have an HSM relation, then enforce
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it on the assess_status() call.
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If param required_relations is not None then it overrides the
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instance/class variable self.required_relations.
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:param required_relations: [list of state names]
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:returns: [states{} as per parent method]
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"""
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if required_relations is None:
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required_relations = self.required_relations
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return super(DRAgentCharm, self).states_to_check(
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required_relations=required_relations)
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