salt-stack "No Top file or external nodes data matches found"解决

salt-stack在配置分组时提示如下信息:
No Top file or external nodes data matches found
后来在官网上找到如下提示，意思是需要重启master服务

Note
When adding or modifying nodegroups to a master configuration file, the master must be restarted for those changes to be fully recognized.
A limited amount of functionality, such as targeting with -N from the command-line may be available without a restart.

参考链接:http://docs.saltstack.com/en/latest/topics/targeting/nodegroups.html