CharmHub and new kafka and zookeeper charms

[osm/devops.git] / installers / charm / pla / src / charm.py

diff --git a/installers/charm/pla/src/charm.py b/installers/charm/pla/src/charm.py
index 4f463bf..2663763 100755 (executable)
--- a/installers/charm/pla/src/charm.py
+++ b/installers/charm/pla/src/charm.py
@@ -24,24 +24,18 @@
 
 
 import logging
-from typing import NoReturn
+from typing import NoReturn, Optional
 
+from charms.kafka_k8s.v0.kafka import KafkaEvents, KafkaRequires
 from ops.main import main
-
 from opslib.osm.charm import CharmedOsmBase, RelationsMissing
-
+from opslib.osm.interfaces.mongo import MongoClient
 from opslib.osm.pod import (
     ContainerV3Builder,
+    PodRestartPolicy,
     PodSpecV3Builder,
 )
-
-from opslib.osm.validator import (
-    ModelValidator,
-    validator,
-)
-
-from opslib.osm.interfaces.kafka import KafkaClient
-from opslib.osm.interfaces.mongo import MongoClient
+from opslib.osm.validator import ModelValidator, validator
 
 
 logger = logging.getLogger(__name__)
@@ -51,7 +45,10 @@ PORT = 9999
 
 class ConfigModel(ModelValidator):
     database_commonkey: str
+    mongodb_uri: Optional[str]
     log_level: str
+    image_pull_policy: str
+    security_context: bool
 
     @validator("log_level")
     def validate_log_level(cls, v):
@@ -59,14 +56,35 @@ class ConfigModel(ModelValidator):
             raise ValueError("value must be INFO or DEBUG")
         return v
 
+    @validator("mongodb_uri")
+    def validate_mongodb_uri(cls, v):
+        if v and not v.startswith("mongodb://"):
+            raise ValueError("mongodb_uri is not properly formed")
+        return v
+
+    @validator("image_pull_policy")
+    def validate_image_pull_policy(cls, v):
+        values = {
+            "always": "Always",
+            "ifnotpresent": "IfNotPresent",
+            "never": "Never",
+        }
+        v = v.lower()
+        if v not in values.keys():
+            raise ValueError("value must be always, ifnotpresent or never")
+        return values[v]
+
 
 class PlaCharm(CharmedOsmBase):
+
+    on = KafkaEvents()
+
     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.kafka = KafkaRequires(self)
+        self.framework.observe(self.on.kafka_available, self.configure_pod)
+        self.framework.observe(self.on.kafka_broken, self.configure_pod)
 
         self.mongodb_client = MongoClient(self, "mongodb")
         self.framework.observe(self.on["mongodb"].relation_changed, self.configure_pod)
@@ -75,9 +93,9 @@ class PlaCharm(CharmedOsmBase):
     def _check_missing_dependencies(self, config: ConfigModel):
         missing_relations = []
 
-        if self.kafka_client.is_missing_data_in_unit():
+        if not self.kafka.host or not self.kafka.port:
             missing_relations.append("kafka")
-        if self.mongodb_client.is_missing_data_in_unit():
+        if not config.mongodb_uri and self.mongodb_client.is_missing_data_in_unit():
             missing_relations.append("mongodb")
 
         if missing_relations:
@@ -86,12 +104,35 @@ class PlaCharm(CharmedOsmBase):
     def build_pod_spec(self, image_info):
         # Validate config
         config = ConfigModel(**dict(self.config))
+
+        if config.mongodb_uri and not self.mongodb_client.is_missing_data_in_unit():
+            raise Exception("Mongodb data cannot be provided via config and relation")
+
         # Check relations
         self._check_missing_dependencies(config)
+
         # Create Builder for the PodSpec
-        pod_spec_builder = PodSpecV3Builder()
+        pod_spec_builder = PodSpecV3Builder(
+            enable_security_context=config.security_context
+        )
+
+        # Add secrets to the pod
+        mongodb_secret_name = f"{self.app.name}-mongodb-secret"
+        pod_spec_builder.add_secret(
+            mongodb_secret_name,
+            {
+                "uri": config.mongodb_uri or self.mongodb_client.connection_string,
+                "commonkey": config.database_commonkey,
+            },
+        )
+
         # Build Container
-        container_builder = ContainerV3Builder(self.app.name, image_info)
+        container_builder = ContainerV3Builder(
+            self.app.name,
+            image_info,
+            config.image_pull_policy,
+            run_as_non_root=config.security_context,
+        )
         container_builder.add_port(name=self.app.name, port=PORT)
         container_builder.add_envs(
             {
@@ -100,18 +141,31 @@ class PlaCharm(CharmedOsmBase):
                 "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,
+                "OSMPLA_MESSAGE_HOST": self.kafka.host,
+                "OSMPLA_MESSAGE_PORT": self.kafka.port,
                 # Database configuration
                 "OSMPLA_DATABASE_DRIVER": "mongo",
-                "OSMPLA_DATABASE_URI": self.mongodb_client.connection_string,
-                "OSMPLA_DATABASE_COMMONKEY": config.database_commonkey,
             }
         )
 
+        container_builder.add_secret_envs(
+            secret_name=mongodb_secret_name,
+            envs={
+                "OSMPLA_DATABASE_URI": "uri",
+                "OSMPLA_DATABASE_COMMONKEY": "commonkey",
+            },
+        )
+
         container = container_builder.build()
+
+        # Add Pod restart policy
+        restart_policy = PodRestartPolicy()
+        restart_policy.add_secrets(secret_names=(mongodb_secret_name))
+        pod_spec_builder.set_restart_policy(restart_policy)
+
         # Add container to pod spec
         pod_spec_builder.add_container(container)
+
         return pod_spec_builder.build()