package serf import "basic.com/valib/serf.git/serf" func QueryMsg2Master(topic string, payload []byte) error { params := &serf.QueryParam{ FilterNodes: nil, FilterTags: map[string]string{"role": "master"}, RequestAck: false, RelayFactor: 0, Timeout: 10, } _, err := agent.Query(topic, payload, params) return err }