Certificate addition support to mon and ro charms

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

diff --git a/installers/charm/ro/src/charm.py b/installers/charm/ro/src/charm.py
index 6851600..5b40c16 100755 (executable)
--- a/installers/charm/ro/src/charm.py
+++ b/installers/charm/ro/src/charm.py
@@ -22,26 +22,43 @@
 
 # pylint: disable=E0213
 
+import base64
 import logging
-from typing import NoReturn
+from typing import NoReturn, Optional
 
 from ops.main import main
 from opslib.osm.charm import CharmedOsmBase, RelationsMissing
 from opslib.osm.interfaces.kafka import KafkaClient
 from opslib.osm.interfaces.mongo import MongoClient
 from opslib.osm.interfaces.mysql import MysqlClient
-from opslib.osm.pod import (
-    ContainerV3Builder,
-    PodSpecV3Builder,
-)
+from opslib.osm.pod import ContainerV3Builder, FilesV3Builder, PodSpecV3Builder
 from opslib.osm.validator import ModelValidator, validator
 
-
 logger = logging.getLogger(__name__)
 
 PORT = 9090
 
 
+def _check_certificate_data(name: str, content: str):
+    if not name or not content:
+        raise ValueError("certificate name and content must be a non-empty string")
+
+
+def _extract_certificates(certs_config: str):
+    certificates = {}
+    if certs_config:
+        cert_list = certs_config.split(",")
+        for cert in cert_list:
+            name, content = cert.split(":")
+            _check_certificate_data(name, content)
+            certificates[name] = content
+    return certificates
+
+
+def decode(content: str):
+    return base64.b64decode(content.encode("utf-8")).decode("utf-8")
+
+
 class ConfigModel(ModelValidator):
     enable_ng_ro: bool
     database_commonkey: str
@@ -49,6 +66,7 @@ class ConfigModel(ModelValidator):
     vim_database: str
     ro_database: str
     openmano_tenant: str
+    certificates: Optional[str]
 
     @validator("log_level")
     def validate_log_level(cls, v):
@@ -56,6 +74,16 @@ class ConfigModel(ModelValidator):
             raise ValueError("value must be INFO or DEBUG")
         return v
 
+    @validator("certificates")
+    def validate_certificates(cls, v):
+        # Raises an exception if it cannot extract the certificates
+        _extract_certificates(v)
+        return v
+
+    @property
+    def certificates_dict(cls):
+        return _extract_certificates(cls.certificates) if cls.certificates else {}
+
 
 class RoCharm(CharmedOsmBase):
     """GrafanaCharm Charm."""
@@ -106,6 +134,15 @@ class RoCharm(CharmedOsmBase):
         if missing_relations:
             raise RelationsMissing(missing_relations)
 
+    def _build_cert_files(
+        self,
+        config: ConfigModel,
+    ):
+        cert_files_builder = FilesV3Builder()
+        for name, content in config.certificates_dict.items():
+            cert_files_builder.add_file(name, decode(content), mode=0o600)
+        return cert_files_builder.build()
+
     def build_pod_spec(self, image_info):
         # Validate config
         config = ConfigModel(**dict(self.config))
@@ -115,6 +152,9 @@ class RoCharm(CharmedOsmBase):
         pod_spec_builder = PodSpecV3Builder()
         # Build Container
         container_builder = ContainerV3Builder(self.app.name, image_info)
+        certs_files = self._build_cert_files(config)
+        if certs_files:
+            container_builder.add_volume_config("certs", "/certs", certs_files)
         container_builder.add_port(name=self.app.name, port=PORT)
         container_builder.add_http_readiness_probe(
             "/ro/" if config.enable_ng_ro else "/openmano/tenants",