fix: update log levels

Following [the guidelines](https://github.com/kubernetes/community/blob/master/contributors/devel/sig-instrumentation/logging.md#what-method-to-use),
the change reflects changing the verbosity levels to reflect significant
or extended state changes

Signed-off-by: Imran Pochi <[email protected]>

Author: ipochi

pkg/server/backend_manager.go

@@ -244,10 +244,10 @@ func containIDType(idTypes []header.IdentifierType, idType header.IdentifierType
 // addBackend adds a backend.
 func (s *DefaultBackendStorage) addBackend(identifier string, idType header.IdentifierType, backend *Backend) {
 	if !containIDType(s.idTypes, idType) {
-		klog.V(4).InfoS("fail to add backend", "backend", identifier, "error", &ErrWrongIDType{idType, s.idTypes})
+		klog.V(3).InfoS("fail to add backend", "backend", identifier, "error", &ErrWrongIDType{idType, s.idTypes})
 		return
 	}
-	klog.V(5).InfoS("Register backend for agent", "agentID", identifier)
+	klog.V(2).InfoS("Register backend for agent", "agentID", identifier)
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	_, ok := s.backends[identifier]
@@ -273,7 +273,7 @@ func (s *DefaultBackendStorage) removeBackend(identifier string, idType header.I
 		klog.ErrorS(&ErrWrongIDType{idType, s.idTypes}, "fail to remove backend")
 		return
 	}
-	klog.V(5).InfoS("Remove connection for agent", "agentID", identifier)
+	klog.V(2).InfoS("Remove connection for agent", "agentID", identifier)
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	backends, ok := s.backends[identifier]
@@ -347,7 +347,7 @@ func (s *DefaultBackendStorage) GetRandomBackend() (*Backend, error) {
 		return nil, &ErrNotFound{}
 	}
 	agentID := s.agentIDs[s.random.Intn(len(s.agentIDs))]
-	klog.V(5).InfoS("Pick agent as backend", "agentID", agentID)
+	klog.V(3).InfoS("Pick agent as backend", "agentID", agentID)
 	// always return the first connection to an agent, because the agent
 	// will close later connections if there are multiple.
 	return s.backends[agentID][0], nil

pkg/server/server.go

@@ -719,7 +719,7 @@ func (s *ProxyServer) Connect(stream agent.AgentService_ConnectServer) error {
 	}
 	agentID := backend.GetAgentID()
 
-	klog.V(5).InfoS("Connect request from agent", "agentID", agentID, "serverID", s.serverID)
+	klog.V(2).InfoS("Connect request from agent", "agentID", agentID, "serverID", s.serverID)
 	labels := runpprof.Labels(
 		"serverCount", strconv.Itoa(s.serverCount),
 		"agentID", agentID,
@@ -946,7 +946,7 @@ func (s *ProxyServer) serveRecvBackend(backend *Backend, agentID string, recvCh
 			klog.V(5).InfoS("Ignoring unrecognized packet from backend", "packet", pkt, "agentID", agentID)
 		}
 	}
-	klog.V(5).InfoS("Close backend of agent", "agentID", agentID)
+	klog.V(3).InfoS("Close backend of agent", "agentID", agentID)
 }
 
 func (s *ProxyServer) sendBackendClose(backend *Backend, connectID int64, random int64, reason string) {