135 lines
4.4 KiB
Python
135 lines
4.4 KiB
Python
#!/usr/bin/python
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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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import base64
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from charms.reactive import RelationBase
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from charms.reactive import hook
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from charms.reactive import scopes
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from charmhelpers.core import hookenv
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class RabbitMQRequires(RelationBase):
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scope = scopes.GLOBAL
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# These remote data fields will be automatically mapped to accessors
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# with a basic documentation string provided.
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auto_accessors = ['password', 'private-address', 'ssl_port',
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'ssl_ca', 'ha_queues', 'ha-vip-only', 'clustered', 'vip']
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def vhost(self):
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return self.get_local('vhost')
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def username(self):
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return self.get_local('username')
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@hook('{requires:rabbitmq}-relation-joined')
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def joined(self):
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self.set_state('{relation_name}.connected')
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def update_state(self):
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if self.base_data_complete():
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self.set_state('{relation_name}.available')
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if self.ssl_data_complete():
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self.set_state('{relation_name}.available.ssl')
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else:
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self.remove_state('{relation_name}.available.ssl')
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else:
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self.remove_state('{relation_name}.available')
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self.remove_state('{relation_name}.available.ssl')
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if not self.rabbitmq_hosts():
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self.remove_state('{relation_name}.connected')
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@hook('{requires:rabbitmq}-relation-changed')
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def changed(self):
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self.update_state()
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@hook('{requires:rabbitmq}-relation-{broken,departed}')
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def departed(self):
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self.update_state()
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def base_data_complete(self):
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"""
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Get the connection string, if available, or None.
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"""
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data = {
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'hostname': self.private_address(),
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'vhost': self.vhost(),
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'username': self.username(),
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'password': self.password(),
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}
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if all(data.values()):
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return True
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return False
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def ssl_data_complete(self):
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"""
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Get the connection string, if available, or None.
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"""
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data = {
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'ssl_port': self.ssl_port(),
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'ssl_ca': self.ssl_ca(),
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}
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if all(data.values()):
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return True
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return False
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def request_access(self, username, vhost, hostname=None):
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"""
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Request access to vhost for the supplied username.
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"""
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if not hostname:
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try:
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hostname = hookenv.network_get_primary_address(
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self.conversation().relation_name
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)
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except NotImplementedError:
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hostname = hookenv.unit_private_ip()
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relation_info = {
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'username': username,
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'vhost': vhost,
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'private-address': hostname,
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}
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self.set_local(**relation_info)
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self.set_remote(**relation_info)
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def configure(self, username, vhost):
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"""
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DEPRECATED: use request_access instead
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Request access to vhost for the supplied username.
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"""
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self.request_access(username, vhost)
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def get_remote_all(self, key, default=None):
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"""Return a list of all values presented by remote units for key"""
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values = []
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for conversation in self.conversations():
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for relation_id in conversation.relation_ids:
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for unit in hookenv.related_units(relation_id):
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value = hookenv.relation_get(key,
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unit,
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relation_id) or default
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if value:
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values.append(value)
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return list(set(values))
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def rabbitmq_hosts(self):
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return self.get_remote_all('private-address')
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def get_ssl_cert(self):
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"""Return decoded CA cert from rabbit or None if no CA present"""
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if self.ssl_ca():
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return base64.b64decode(self.ssl_ca()).decode('utf-8')
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return None
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