Temporal Charm

Initial commit of a basic Temporal deployment that uses
MySQL/MariaDB with root for database creation

Change-Id: Id5ff1a1ea69a0e760efe07ffc233fb8041658dee
Signed-off-by: Mark Beierl <mark.beierl@canonical.com>
diff --git a/installers/charm/osm-nbi/src/charm.py b/installers/charm/osm-nbi/src/charm.py
index 23ab054..77c8a18 100755
--- a/installers/charm/osm-nbi/src/charm.py
+++ b/installers/charm/osm-nbi/src/charm.py
@@ -41,6 +41,7 @@
     check_service_active,
 )
 from charms.osm_nbi.v0.nbi import NbiProvides
+from charms.osm_temporal.v0.temporal import TemporalRequires
 from lightkube.models.core_v1 import ServicePort
 from ops.charm import ActionEvent, CharmBase, RelationJoinedEvent
 from ops.framework import StoredState
@@ -82,6 +83,7 @@
         )
         self.kafka = KafkaRequires(self)
         self.nbi = NbiProvides(self)
+        self.temporal = TemporalRequires(self)
         self.mongodb_client = MongoClient(self, "mongodb")
         self.prometheus_client = PrometheusClient(self, "prometheus")
         self.keystone_client = KeystoneClient(self, "keystone")
@@ -182,6 +184,8 @@
             # Action events
             self.on.get_debug_mode_information_action: self._on_get_debug_mode_information_action,
             self.on.nbi_relation_joined: self._update_nbi_relation,
+            self.on["temporal"].relation_changed: self._on_config_changed,
+            self.on["temporal"].relation_broken: self._on_required_relation_broken,
         }
         for relation in [self.on[rel_name] for rel_name in ["mongodb", "prometheus", "keystone"]]:
             event_handler_mapping[relation.relation_changed] = self._on_config_changed
@@ -215,6 +219,8 @@
             missing_relations.append("prometheus")
         if self.keystone_client.is_missing_data_in_app():
             missing_relations.append("keystone")
+        if not self.temporal.host or not self.temporal.port:
+            missing_relations.append("temporal")
 
         if missing_relations:
             relations_str = ", ".join(missing_relations)
@@ -289,6 +295,9 @@
                         "OSMNBI_SERVER_SSL_CERTIFICATE": "",
                         "OSMNBI_SERVER_SSL_PRIVATE_KEY": "",
                         "OSMNBI_SERVER_SSL_PASS_PHRASE": "",
+                        # Temporal configuration
+                        "OSMNBI_TEMPORAL_HOST": self.temporal.host,
+                        "OSMNBI_TEMPORAL_PORT": self.temporal.port,
                     },
                 }
             },