-class PLACharm(CharmBase):
- state = StoredState()
-
- def __init__(self, framework, key):
- super().__init__(framework, key)
- self.state.set_default(spec=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)
-
- def _apply_spec(self):
- # Only apply the spec if this unit is a leader.
- if not self.framework.model.unit.is_leader():
- return
- new_spec = self.make_pod_spec()
- if new_spec == self.state.spec:
- return
- self.framework.model.pod.set_spec(new_spec)
- self.state.spec = new_spec
-
- def make_pod_spec(self):
- config = self.framework.model.config
-
- ports = [
- {"name": "port", "containerPort": config["port"], "protocol": "TCP",},
- ]
-
- kubernetes = {
- "readinessProbe": {
- "tcpSocket": {"port": config["port"]},
- "timeoutSeconds": 5,
- "periodSeconds": 5,
- "initialDelaySeconds": 10,
- },
- "livenessProbe": {
- "tcpSocket": {"port": config["port"]},
- "timeoutSeconds": 5,
- "initialDelaySeconds": 45,
- },
- }
- config_spec = {
- "OSMPLA_MESSAGE_DRIVER": "kafka",
- "OSMPLA_MESSAGE_HOST": config["kafka_host"],
- "OSMPLA_MESSAGE_PORT": config["kafka_port"],
- "OSMPLA_DATABASE_DRIVER": "mongo",
- "OSMPLA_DATABASE_URI": config["mongo_uri"],
- "OSMPLA_GLOBAL_LOG_LEVEL": config["log_level"],
- }
-
- spec = {
- "version": 2,
- "containers": [
- {
- "name": self.framework.model.app.name,
- "image": "{}".format(config["image"]),
- "ports": ports,
- "kubernetes": kubernetes,
- "config": config_spec,
- }
- ],
- }
-
- return spec
-
- def on_config_changed(self, event):
- """Handle changes in configuration"""
- unit = self.model.unit
- unit.status = MaintenanceStatus("Applying new pod spec")
- self._apply_spec()
- unit.status = ActiveStatus("Ready")
-
- def on_start(self, event):
- """Called when the charm is being installed"""
- unit = self.model.unit
- unit.status = MaintenanceStatus("Applying pod spec")
- self._apply_spec()
- unit.status = ActiveStatus("Ready")
-
- def on_upgrade_charm(self, event):
- """Upgrade the charm."""
- unit = self.model.unit
- unit.status = MaintenanceStatus("Upgrading charm")
- self.on_start(event)
+logger = logging.getLogger(__name__)
+
+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,
+ }
+ )
+
+ container = container_builder.build()
+ # Add container to pod spec
+ pod_spec_builder.add_container(container)
+ return pod_spec_builder.build()