[#255] add filter priority to get_filtered_logs method

src/frostfs_testlib/hosting/docker_host.py

@@ -240,6 +240,7 @@ class DockerHost(Host):
         until: Optional[datetime] = None,
         unit: Optional[str] = None,
         exclude_filter: Optional[str] = None,
+        priority: Optional[str] = None
     ) -> str:
         client = self._get_docker_client()
         filtered_logs = ""

src/frostfs_testlib/hosting/interfaces.py

@@ -297,6 +297,7 @@ class Host(ABC):
         until: Optional[datetime] = None,
         unit: Optional[str] = None,
         exclude_filter: Optional[str] = None,
+        priority: Optional[str] = None
     ) -> str:
         """Get logs from host filtered by regex.
 
@@ -305,6 +306,8 @@ class Host(ABC):
             since: If set, limits the time from which logs should be collected. Must be in UTC.
             until: If set, limits the time until which logs should be collected. Must be in UTC.
             unit: required unit.
+            priority: logs level, 0 - emergency, 7 - debug. All messages with that code and higher. 
+            For example, if we specify the -p 2 option, journalctl will show all messages with levels 2, 1 and 0.
 
         Returns:
             Found entries as str if any found.

src/frostfs_testlib/steps/metrics.py

@@ -19,7 +19,7 @@ def check_metrics_counter(
         counter_act += get_metrics_value(cluster_node, parse_from_command, **metrics_greps)
     assert eval(
         f"{counter_act} {operator} {counter_exp}"
-    ), f"Expected: {counter_exp}, Actual: {counter_act} in node: {cluster_node}"
+    ), f"Expected: {counter_exp} {operator} Actual: {counter_act} in node: {cluster_node}"
 
 
 @reporter.step("Get metrics value from node: {node}")