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provides.py
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provides.py
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#!/usr/bin/python
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from charms.reactive import RelationBase
from charms.reactive import hook
from charms.reactive import scopes
class EtcdProvider(RelationBase):
scope = scopes.GLOBAL
@hook('{provides:etcd-proxy}-relation-{joined,changed}')
def joined_or_changed(self):
''' Set state so the unit can identify it is connecting '''
self.set_state('{relation_name}.connected')
@hook('{provides:etcd-proxy}-relation-{broken,departed}')
def broken_or_departed(self):
''' Set state so the unit can identify it is departing '''
self.remove_state('{relation_name}.connected')
def set_client_credentials(self, key, cert, ca):
''' Set the client credentials on the global conversation for this
relation. '''
self.set_remote('client_key', key)
self.set_remote('client_ca', ca)
self.set_remote('client_cert', cert)
def set_cluster_string(self, cluster_string):
''' Set the cluster string on the convsersation '''
self.set_remote('cluster', cluster_string)
# Kept for backwords compatibility
def provide_cluster_string(self, cluster_string):
'''
@params cluster_string - fully formed etcd cluster string.
This is akin to the --initial-cluster-string setting to the
etcd-daemon. Proxy's will need to know each declared member of
the cluster to effectively proxy.
'''
self.set_remote('cluster', cluster_string)