167 lines
6.0 KiB
Python
167 lines
6.0 KiB
Python
# Copyright 2019 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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from charms import reactive
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import charmhelpers.contrib.network.ip as ch_net_ip
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import charmhelpers.core as ch_core
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class MySQLInnoDBClusterPeer(reactive.Endpoint):
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# MySQL InnoDB Cluster must have at least 3 units for viability
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minimum_cluster_size = 3
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.ingress_address = ch_net_ip.get_relation_ip(self.endpoint_name)
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def relation_ids(self):
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return [x.relation_id for x in self.relations]
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def set_ingress_address(self):
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for relation in self.relations:
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relation.to_publish_raw["ingress-address"] = self.ingress_address
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relation.to_publish_raw["private-address"] = self.ingress_address
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@property
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def peer_relation(self):
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# Get the first relation object as we only have one relation to peers
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for relation in self.relations:
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return relation
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def available(self):
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if len(self.all_joined_units) < (self.minimum_cluster_size - 1):
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return False
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for unit in self.all_joined_units:
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if not unit.received['cluster-address']:
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return False
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if not unit.received['cluster-user']:
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return False
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if not unit.received['cluster-password']:
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return False
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return True
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def set_or_clear_available(self):
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if self.available():
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reactive.set_flag(self.expand_name('{endpoint_name}.available'))
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else:
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reactive.clear_flag(self.expand_name('{endpoint_name}.available'))
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def clustered(self):
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if len(self.all_joined_units) < (self.minimum_cluster_size - 1):
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return False
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for unit in self.all_joined_units:
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if not unit.received['unit-clustered']:
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return False
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return True
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@reactive.when('endpoint.{endpoint_name}.joined')
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def joined(self):
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self.set_ingress_address()
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reactive.set_flag(self.expand_name('{endpoint_name}.connected'))
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self.set_or_clear_available()
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@reactive.when('endpoint.{endpoint_name}.changed')
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def changed(self):
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flags = (
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self.expand_name(
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'endpoint.{endpoint_name}.changed.cluster-address'),
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self.expand_name(
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'endpoint.{endpoint_name}.changed.cluster-user'),
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self.expand_name(
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'endpoint.{endpoint_name}.changed.cluster-password'),
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# Optimizers
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self.expand_name(
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'endpoint.{endpoint_name}.changed.unit-configure-ready'),
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self.expand_name(
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'endpoint.{endpoint_name}.changed.unit-clustered'),
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)
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if reactive.all_flags_set(*flags):
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for flag in flags:
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reactive.clear_flag(flag)
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self.set_or_clear_available()
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if self.clustered():
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reactive.set_flag(self.expand_name('{endpoint_name}.clustered'))
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else:
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reactive.clear_flag(self.expand_name('{endpoint_name}.clustered'))
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def remove(self):
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flags = (
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self.expand_name('{endpoint_name}.connected'),
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self.expand_name('{endpoint_name}.available'),
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)
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for flag in flags:
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reactive.clear_flag(flag)
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@reactive.when('endpoint.{endpoint_name}.departed')
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def departed(self):
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self.remove()
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@reactive.when('endpoint.{endpoint_name}.broken')
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def broken(self):
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self.remove()
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def set_cluster_connection_info(
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self, cluster_address, cluster_user, cluster_password):
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"""Send cluster connection information to peers.
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:param cluster_address: Cluster IP or hostname
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:type cluster_address: str
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:param cluster_user: User for cluster user
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:type cluster_user: str
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:param cluster_password: Password for cluster user
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:type cluster_password: str
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:side effect: Data is set on the relation
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:returns: None, this function is called for its side effect
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:rtype: None
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"""
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if not self.peer_relation:
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ch_core.hookenv.log(
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"No mysql-inndb-cluster peer relation: possibly departing.",
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"WARNING")
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return
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self.peer_relation.to_publish['cluster-address'] = cluster_address
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self.peer_relation.to_publish['cluster-user'] = cluster_user
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self.peer_relation.to_publish['cluster-password'] = cluster_password
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def set_unit_configure_ready(self):
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"""Indicate to the cluster peers this unit is ready for configuration.
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:side effect: Data is set on the relation
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:returns: None, this function is called for its side effect
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:rtype: None
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"""
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if not self.peer_relation:
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ch_core.hookenv.log(
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"No mysql-inndb-cluster peer relation: possibly departing.",
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"WARNING")
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return
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self.peer_relation.to_publish['unit-configure-ready'] = True
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def set_unit_clustered(self):
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"""Indicate to the cluster peers this unit is clustered.
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:side effect: Data is set on the relation
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:returns: None, this function is called for its side effect
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:rtype: None
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"""
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if not self.peer_relation:
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ch_core.hookenv.log(
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"No mysql-inndb-cluster peer relation: possibly departing.",
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"WARNING")
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return
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self.peer_relation.to_publish['unit-clustered'] = True
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