diff --git a/api/http.go b/api/http.go
index 56c2f4f..444baf9 100644
--- a/api/http.go
+++ b/api/http.go
@@ -63,6 +63,7 @@ func (h *Handler) log(w http.ResponseWriter, req *http.Request) {
 	}
 }
 
+// NewHandler new api http handler
 func NewHandler(config *types.Config, workloadManager *workload.Manager) *Handler {
 	return &Handler{
 		config:          config,
diff --git a/manager/workload/log.go b/manager/workload/log.go
index 24906f9..cb1ee80 100644
--- a/manager/workload/log.go
+++ b/manager/workload/log.go
@@ -37,7 +37,7 @@ func (l *logBroadcaster) subscribe(app string, buf *bufio.ReadWriter) {
 	}
 
 	ID := coreutils.RandomString(8)
-	ctx, cancel := context.WithCancel(context.Background())
+	ctx, cancel := context.WithCancel(context.TODO())
 	defer cancel()
 
 	l.subscribers[app][ID] = &subscriber{buf, cancel}
diff --git a/manager/workload/manager.go b/manager/workload/manager.go
index 9a98327..2813ee4 100644
--- a/manager/workload/manager.go
+++ b/manager/workload/manager.go
@@ -118,6 +118,7 @@ func (m *Manager) Run(ctx context.Context) error {
 	}
 }
 
+// Subscribe subscribes logs
 func (m *Manager) Subscribe(app string, buf *bufio.ReadWriter) {
 	m.logBroadcaster.subscribe(app, buf)
 }