-
-class PLACharm(CharmBase):
- state = StoredState()
-
- def __init__(self, framework, key):
- super().__init__(framework, key)
- self.state.set_default(spec=None)
- self.state.set_default(kafka_host=None)
- self.state.set_default(kafka_port=None)
- self.state.set_default(mongodb_uri=None)
- self.state.set_default(mysql_host=None)
- self.state.set_default(mysql_port=None)
-
- # Observe Charm related events
- self.framework.observe(self.on.config_changed, self.on_config_changed)
- self.framework.observe(self.on.start, self.on_start)
- self.framework.observe(self.on.upgrade_charm, self.on_upgrade_charm)
-
- # Relations
- self.framework.observe(
- self.on.kafka_relation_changed, self.on_kafka_relation_changed
- )
- self.framework.observe(
- self.on.mongo_relation_changed, self.on_mongo_relation_changed
- )
- self.framework.observe(
- self.on.mysql_relation_changed, self.on_mysql_relation_changed
- )
-
- def _apply_spec(self):
- # Only apply the spec if this unit is a leader.
- unit = self.model.unit
- if not unit.is_leader():
- unit.status = ActiveStatus("Ready")
- return
- if not self.state.kafka_host or not self.state.kafka_port:
- unit.status = WaitingStatus("Waiting for Kafka")
- return
- if not self.state.mongodb_uri:
- unit.status = WaitingStatus("Waiting for MongoDB")
- return
- if not self.state.mysql_host or not self.state.mysql_port:
- unit.status = WaitingStatus("Waiting for MySQL")
- return
-
- unit.status = MaintenanceStatus("Applying new pod spec")
-
- new_spec = self.make_pod_spec()
- if new_spec == self.state.spec:
- unit.status = ActiveStatus("Ready")
- return
- self.framework.model.pod.set_spec(new_spec)
- self.state.spec = new_spec
- unit.status = ActiveStatus("Ready")
-
- def make_pod_spec(self):
- config = self.framework.model.config
-
- mysql_uri = "mysql://root:{}@{}:{}/{}".format(
- self.state.mysql_root_password,
- self.state.mysql_host,
- self.state.mysql_port,
- self.state.mysql_database,
- )
- ports = [
- {"name": "port", "containerPort": config["port"], "protocol": "TCP",},
- ]
-
- config_spec = {
- "OSMPLA_MESSAGE_DRIVER": "kafka",
- "OSMPLA_MESSAGE_HOST": self.state.kafka_host,
- "OSMPLA_MESSAGE_PORT": self.state.kafka_port,
- "OSMPLA_DATABASE_DRIVER": "mongo",
- "OSMPLA_DATABASE_URI": self.state.mongodb_uri,
- "OSMPLA_GLOBAL_LOG_LEVEL": config["log_level"],
- "OSMPLA_SQL_DATABASE_URI": mysql_uri,
- "OSMPLA_DATABASE_COMMONKEY": config["database_common_key"],
- }
-
- spec = {
- "version": 2,
- "containers": [
- {
- "name": self.framework.model.app.name,
- "image": config["image"],
- "ports": ports,
- "config": config_spec,
- }
- ],
- }
-
- return spec
-
- def on_config_changed(self, event):
- """Handle changes in configuration"""
- self._apply_spec()
-
- def on_start(self, event):
- """Called when the charm is being installed"""
- self._apply_spec()
-
- def on_upgrade_charm(self, event):
- """Upgrade the charm."""
- unit = self.model.unit
- unit.status = MaintenanceStatus("Upgrading charm")
- self.on_start(event)
-
- def on_kafka_relation_changed(self, event):
- unit = self.model.unit
- if not unit.is_leader():
- return
- self.state.kafka_host = event.relation.data[event.unit].get("host")
- self.state.kafka_port = event.relation.data[event.unit].get("port")
- self._apply_spec()
-
- def on_mongo_relation_changed(self, event):
- unit = self.model.unit
- if not unit.is_leader():
- return
- self.state.mongodb_uri = event.relation.data[event.unit].get(
- "connection_string"
+PORT = 9999
+
+
+class ConfigModel(ModelValidator):
+ database_commonkey: str
+ log_level: str
+
+ @validator("log_level")
+ def validate_log_level(cls, v):
+ if v not in {"INFO", "DEBUG"}:
+ raise ValueError("value must be INFO or DEBUG")
+ return v
+
+
+class PlaCharm(CharmedOsmBase):
+ def __init__(self, *args) -> NoReturn:
+ super().__init__(*args, oci_image="image")
+
+ self.kafka_client = KafkaClient(self, "kafka")
+ self.framework.observe(self.on["kafka"].relation_changed, self.configure_pod)
+ self.framework.observe(self.on["kafka"].relation_broken, self.configure_pod)
+
+ self.mongodb_client = MongoClient(self, "mongodb")
+ self.framework.observe(self.on["mongodb"].relation_changed, self.configure_pod)
+ self.framework.observe(self.on["mongodb"].relation_broken, self.configure_pod)
+
+ def _check_missing_dependencies(self, config: ConfigModel):
+ missing_relations = []
+
+ if self.kafka_client.is_missing_data_in_unit():
+ missing_relations.append("kafka")
+ if self.mongodb_client.is_missing_data_in_unit():
+ missing_relations.append("mongodb")
+
+ if missing_relations:
+ raise RelationsMissing(missing_relations)
+
+ def build_pod_spec(self, image_info):
+ # Validate config
+ config = ConfigModel(**dict(self.config))
+ # Check relations
+ self._check_missing_dependencies(config)
+ # Create Builder for the PodSpec
+ pod_spec_builder = PodSpecV3Builder()
+ # Build Container
+ container_builder = ContainerV3Builder(self.app.name, image_info)
+ container_builder.add_port(name=self.app.name, port=PORT)
+ container_builder.add_envs(
+ {
+ # General configuration
+ "ALLOW_ANONYMOUS_LOGIN": "yes",
+ "OSMPLA_GLOBAL_LOG_LEVEL": config.log_level,
+ # Kafka configuration
+ "OSMPLA_MESSAGE_DRIVER": "kafka",
+ "OSMPLA_MESSAGE_HOST": self.kafka_client.host,
+ "OSMPLA_MESSAGE_PORT": self.kafka_client.port,
+ # Database configuration
+ "OSMPLA_DATABASE_DRIVER": "mongo",
+ "OSMPLA_DATABASE_URI": self.mongodb_client.connection_string,
+ "OSMPLA_DATABASE_COMMONKEY": config.database_commonkey,
+ }