func replaceConfig(e *etcdm.EtcdManager, nc *cluster.NilConfig) error { lsi, _, err := e.GetLeaderSentinelInfo() if lsi == nil { return fmt.Errorf("leader sentinel info not available") } ncj, err := json.Marshal(nc) if err != nil { return fmt.Errorf("failed to marshall config: %v", err) } req, err := http.NewRequest("PUT", fmt.Sprintf("http://%s:%s/config/current", lsi.ListenAddress, lsi.Port), bytes.NewReader(ncj)) if err != nil { return fmt.Errorf("cannot create request: %v", err) } req.Header.Set("Content-Type", "application/json") client := &http.Client{} res, err := client.Do(req) if err != nil { return fmt.Errorf("error setting config: %v", err) } if res.StatusCode != http.StatusOK { return fmt.Errorf("error setting config: leader sentinel returned non ok code: %s", res.Status) } return nil }