Fix linting errors

2 files changed, 9 insertions, 2 deletions

diff --git a/robusta_krr/utils/configurable.py b/robusta_krr/utils/configurable.py
index 8954139..00c3a64 100644
--- a/robusta_krr/utils/configurable.py
+++ b/robusta_krr/utils/configurable.py
@@ -93,9 +93,9 @@ class Configurable(abc.ABC):
 
         self.echo(message, type="WARNING")
 
-    def error(self, message: str = "") -> None:
+    def error(self, message: str | Exception = "") -> None:
         """
         Echoes an error message to the user
         """
 
-        self.echo(message, type="ERROR")
+        self.echo(str(message), type="ERROR")
diff --git a/robusta_krr/utils/service_discovery.py b/robusta_krr/utils/service_discovery.py
index 42890d3..20138ed 100644
--- a/robusta_krr/utils/service_discovery.py
+++ b/robusta_krr/utils/service_discovery.py
@@ -1,4 +1,5 @@
 from typing import Optional
+from abc import ABC, abstractmethod
 
 from cachetools import TTLCache
 from kubernetes import client
@@ -82,3 +83,9 @@ class ServiceDiscovery(Configurable):
                 return ingress_url
 
         return None
+
+
+class MetricsServiceDiscovery(ServiceDiscovery, ABC):
+    @abstractmethod
+    def find_metrics_url(self, *, api_client: Optional[ApiClient] = None) -> Optional[str]:
+        pass