intercept netplugin std error

containernetworking · Dec 19, 2019 · bdd126b · bdd126b
1 parent 46b9d6f
commit bdd126b
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/pkg/invoke/raw_exec.go b/pkg/invoke/raw_exec.go
@@ -44,10 +44,14 @@ func (e *RawExec) ExecPlugin(ctx context.Context, pluginPath string, stdinData [
 }
 
 func pluginErr(err error, output []byte) error {
-	if _, ok := err.(*exec.ExitError); ok {
+	if exitError, ok := err.(*exec.ExitError); ok {
 		emsg := types.Error{}
 		if len(output) == 0 {
-			emsg.Msg = "netplugin failed with no error message"
+			if len(exitError.Stderr) == 0 {
+				emsg.Msg = "netplugin failed with no error message"
+			} else {
+				emsg.Msg = fmt.Sprintf("netplugin failed: %q", string(exitError.Stderr))
+			}
 		} else if perr := json.Unmarshal(output, &emsg); perr != nil {
 			emsg.Msg = fmt.Sprintf("netplugin failed but error parsing its diagnostic message %q: %v", string(output), perr)
 		}