fix: create UnitPolicy for metrics

Author: Kimonas Sotirchos

src/charm.py

@@ -11,7 +11,7 @@
 from charmed_kubeflow_chisme.kubernetes import KubernetesResourceHandler
 from charmed_kubeflow_chisme.lightkube.batch import delete_many
 from charms.grafana_k8s.v0.grafana_dashboard import GrafanaDashboardProvider
-from charms.istio_beacon_k8s.v0.service_mesh import ServiceMeshConsumer
+from charms.istio_beacon_k8s.v0.service_mesh import AppPolicy, ServiceMeshConsumer, UnitPolicy
 from charms.istio_ingress_k8s.v0.istio_ingress_route import (
     BackendRef,
     HTTPPathMatch,
@@ -89,7 +89,7 @@ def __init__(self, *args):
         self._container_name = "kubeflow-dashboard"
         self._container = self.unit.get_container(self._name)
         self._configmap_name = self.model.config["dashboard-configmap"]
-        self._port = self.model.config["port"]
+        self._port = int(self.model.config["port"])
         self._registration_flow = self.model.config["registration-flow"]
         self._k8s_resource_handler = None
         self._configmap_handler = None
@@ -109,7 +109,12 @@ def __init__(self, *args):
         self.service_patcher = KubernetesServicePatch(self, [port])
 
         # Ambient Mesh integration
-        self._mesh = ServiceMeshConsumer(self)
+        self._mesh = ServiceMeshConsumer(
+            self,
+            policies=[
+                UnitPolicy(relation="metrics-endpoint", ports=[self._port]),
+            ],
+        )
         self.ingress = IstioIngressRouteRequirer(self, relation_name="istio-ingress-route")
         self._ambient_mesh_ingress()